Lexmark X734de Service Manual
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Lexmark X734de Service Manual

Lexmark X734de Service Manual

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Table of Contents

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See also: Administrator's Manual , Service Manual
Revised: June 9, 2009
™
Lexmark
X734de, X736de,
X738de, X738dte MFP
7526
• Table of contents
• Start diagnostics
• Safety and notices
• Trademarks
• Index
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.

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Summary of Contents for Lexmark X734de

  • Page 1 X734de, X736de, X738de, X738dte MFP 7526 • Table of contents • Start diagnostics • Safety and notices • Trademarks • Index Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
  • Page 2 Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. PrintCryption is a trademark of Lexmark International, Inc.

  • Page 3: Table Of Contents

    7526 Table of contents Notices and safety information ......... . . xi Laser notice .
  • Page 4 7526 160.xx, 161.xx—Motor Error (option tray 2) service check ......2-60 162.xx, 163.xx—Motor (option tray 3) error service check .
  • Page 5 7526 920.14—POST—Cartridge motor 2 not connected error service check ....2-115 920.15, 920.20—POST—Bad transfer module NVRAM data error service check ..2-116 920.16—POST error service check .
  • Page 6 7526 Panel Menus ..............3-34 PPDS Emulation .
  • Page 7 7526 Left cover removal ............. . 4-23 Left door cover removal .
  • Page 8 7526 Waste toner assembly removal ........... 4-186 Wireless network antenna removal .
  • Page 9 7526 Connector locations ..............Locations—printer base .
  • Page 10 7526 Service Manual...

  • Page 11: Notices And Safety Information

    7526 Notices and safety information Laser notice The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR Subchapter J for Class I (1) laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 60825-1.
  • Page 12 7526 Avisos sobre el láser Se certifica que, en los EE.UU., esta impresora cumple los requisitos para los productos láser de Clase I (1) establecidos en el subcapítulo J de la norma CFR 21 del DHHS (Departamento de Sanidad y Servicios) y, en los demás países, reúne todas las condiciones expuestas en la norma IEC 60825-1 para productos láser de Clase I (1).
  • Page 13 7526 Laserilmoitus Tämä tulostin on sertifioitu Yhdysvalloissa DHHS 21 CFR Subchapter J -standardin mukaiseksi luokan I (1) - lasertuotteeksi ja muualla IEC 60825-1 -standardin mukaiseksi luokan I lasertuotteeksi. Luokan I lasertuotteita ei pidetä haitallisina. Tulostimen sisällä on luokan IIIb (3b) laser, joka on nimellisteholtaan 5 mW:n galliumarsenidilaser ja toimii 770 - 795 nanometrin aallonpituuksilla.
  • Page 14 7526 Avís sobre el Làser Segons ha estat certificat als Estats Units, aquesta impressora compleix els requisits de DHHS 21 CFR, apartat J, pels productes làser de classe I (1), i segons ha estat certificat en altres llocs, és un producte làser de classe I que compleix els requisits d’IEC 60825-1.
  • Page 15 7526 Notices and safety information...
  • Page 16 7526 Service Manual...

  • Page 17: Lithium Warning

    7526 Lithium warning CAUTION This product contains a lithium battery. THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE. Discard used batteries according to the battery manufacturer’s instructions and local regulations. Safety information • The safety of this product is based on testing and approvals of the original design and specific components.
  • Page 18 7526 Sicherheitshinweise • Die Sicherheit dieses Produkts basiert auf Tests und Zulassungen des ursprünglichen Modells und bestimmter Bauteile. Bei Verwendung nicht genehmigter Ersatzteile wird vom Hersteller keine Verantwortung oder Haftung für die Sicherheit übernommen. • Die Wartungsinformationen für dieses Produkt sind ausschließlich für die Verwendung durch einen Wartungsfachmann bestimmt.
  • Page 19 7526 Informació de Seguretat • La seguretat d'aquest producte es basa en l'avaluació i aprovació del disseny original i els components específics. El fabricant no es fa responsable de les qüestions de seguretat si s'utilitzen peces de recanvi no autoritzades. •...

  • Page 20: Preface

    7526 Preface This manual contains maintenance procedures for service personnel. It is divided into the following chapters: General information contains a general description of the MFP and the maintenance approach used to repair it. Special tools and test equipment, as well as general environmental and safety instructions, are discussed.

  • Page 21: General Information

    Including the base machine capacity of 650 sheets, the MFP supports up to 3,200 sheets. The Lexmark C73xde options are compatible with the Lexmark X73xde MFP, but not with any other Lexmark printers. No other options are supported by the X73xde.

  • Page 22: Memory Options

    The following table contains the dimensions and weight for each of the respective printer models. This does not include packaging. Height Width Depth Weight Lexmark X734de, X736de, X738de Basic printer (cartridges only) 787 mm 546 mm 622 mm 44kg (31 in) (21.5 in)

  • Page 23: Clearances

    - flatbed Scan Area - flatbed Maximum 8.5" x 14" (216 mm x 356 mm) ADF scanner ADF type X734de—Simplex ADF with C-shaped path X736de, X738de, X738dte—Duplex scan, recirculating (RADF), C-shaped path Optical resolution ADF Maximum 600 x 600 dpi...

  • Page 24: Memory

    7526 ADF scanner (continued) Scanner media weight Maximum: 32 lb. (120 g/m Minimum: 14 lb. (52g/m Scan area - ADF Maximum: 8.5 in. x 14 in. (216 mm x 355 mm) SEF Minimum: 4.1 in. x 5.8 in. (105 mm x 148 mm) SEF Printer Print technology Belt fuser...

  • Page 25: Environment Specifications

    7526 Environment specifications Environment Specifications Operating Air temperature—Operating 15.6° to 32.2° C (60° to 90° F) Air temperature—Power off 10° to 40° C (50° to 104° F) Air Relative Humidity 8% to 80% Wet Bulb Temperature—Operating 22.8° C (73.0° F) Maximum Web Bulb Temperature—Power off 26.7°...

  • Page 26: Electrical And Power Specifications

    The following table specifies nominal average power requirements for the basic printer configurations. All power levels are shown in Watts (W). Maximum current is given in Amperes (A). Lexmark X738de, Printing states Lexmark X734de Lexmark X736de X738dte Printing states Power Saver...

  • Page 27: Acoustic Specifications

    Scanning Standby mode Lexmark has implemented features in the X73xde Series MFPs that allow our customers to easily select various operating modes in order to reach their sustainability goals related to environmental and noise pollution. These new features are Eco Mode and Quiet Mode.

  • Page 28: Media Specifications

    7526 Media specifications Paper designed for use with xerographic copiers should provide satisfactory print quality and feed reliability. Other types of media may be suitable. It is recommended that users test any particular brand for suitability to their applications. Refer to the printer User's Guide for additional media specifications. Paper Follow the media guidelines below for successful printing: •...
  • Page 29 7526 Using recycled paper and other office papers Recycled office paper produced specifically for use in laser (electrophotographic) printers may be used in your printer. However, no blanket statement can be made that all recycled paper will feed well. Generally, the following property guidelines apply to recycled paper. •...

  • Page 30: Input And Output Capacities

    Capacity may vary and is subject to media specifications and printer operating environment. The capacities are based on plain paper at 75g/m Support by model Function Lexmark X734de, Lexmark X738dte X736de, X738de Standard input sources Primary tray capacity (sheets)

  • Page 31: Input And Output Sizes And Types

    7526 Input and output sizes and types Media Sizes Paper sizes ✓ ✓ ✓ ✓ ✓ ✓ A4 210 x 297 mm ✓ ✓ ✓ ✓ ✓ A5 148 x 210 mm ✓ ✓ A6 105 x 148 mm ✓ ✓...
  • Page 32 7526 Media Sizes (continued) Envelopes ✓ ✓ C6 Envelope 114 x 162 mm ✓ ✓ B6 Envelope 125 x 176 mm ✓ ✓ C65 Envelope 114 x 229 mm ✓ ✓ C5 Envelope 162 x 229 mm ✓ ✓ B5 Envelope 176 x 250 mm ✓...

  • Page 33: Paper Guidelines

    7526 Media weight, primary tray and option tray Size Type Weight Letter, Legal, A4 Xerographic and bond Long grain 60 g/m –162.7 g/m (16 lb–43 lb) Short grain 162.7 g/m –198.9 g/m (43 lb–53.2 lb) Recycled Long grain 75 g/m –177 g/m (20 lb–47 lb) Short grain...
  • Page 34 7526 Grain direction—Grain refers to the alignment of the paper fibers in a sheet of paper. Grain is either grain long, running the length of the paper, or grain short, running the width of the paper. For 60 to 135 g/m (16 to 36 lb bond) paper, grain long paper is recommended.

  • Page 35: Tools Required For Service

    7526 Storing paper Use these paper storage guidelines to help avoid jams and uneven print quality: • For best results, store paper where the temperature is 21°C (70°F) and the relative humidity is 40%. Most label manufacturers recommend printing in a temperature range of 18 to 24°C (65 to 75°F) with relative humidity between 40 and 60%.
  • Page 36 7526 Gigabyte HCIT High-Capacity Input Tray HCOF High-Capacity Output Finisher HVPS High-Voltage Power Supply Internal Solutions Port Image Transfer Unit Black LASER Light Amplification by Stimulated Emission of Radiation Liquid Crystal Display Light-Emitting Diode Long-Edge Fed LVPS Low-Voltage Power Supply Magenta Multipurpose Feeder MROM...

  • Page 37: Diagnostic Information

    7526 2. Diagnostic information Start CAUTION Remove the power cord from the electrical outlet before you connect or disconnect any cable or electronic card or assembly for personal safety and to prevent damage to the printer. Use the service error code, user status message, user error message, symptom table, service checks, and diagnostic aids in this chapter to determine the corrective action necessary to repair a malfunctioning printer.

  • Page 38: Operator Panel And Menus

    7526 Operator panel and menus Operator panel The operator panel consists of these items: USB port Numeric keypad Home button Adjustable angle Stop button Start button Indicator touchscreen light Buttons, icons, and light description Button or light Function Display The display shows messages and pictures that communicate the status of the printer.
  • Page 39 7526 Button or light Function USB direct port Insert a USB flash drive to send data to the printer. Insert a USB cable from a digital camera to print photos with a PictBridge- enabled digital camera. Numeric keypad Consists of the numbers 0–9, a backspace button, and a pound (#) button. Touch Select functions as a select button.

  • Page 40: Administrative Menu

    7526 Button or light Function Press to return to the previous screen. Note: This button is only active if it appears on the bottom right of the screen. Continue. Administrative Menu Note: Some menu items may not be available based on the printer model or the options installed. Touch Menu ( ) on the display to access these menus.

  • Page 41: Power-On Self Test (Post) Sequence

    7526 Power-on self test (POST) sequence When you turn the printer on, it performs a Power-On Self Test. Check for correct POST functioning of the base printer by observing the following: The LED turns on. The main fan turns on. The operator panel turns on.

  • Page 42: Symptom Tables

    7526 Symptom tables Printer symptom table Symptom Action Dead printer Go to “Dead printer service check” on page 2-140. Operator panel—one or more buttons do Go to “One or more operator panel buttons fail” on not work. page 2-145. Operator panel—display is blank. Printer Go to “Operator panel display blank, five beeps, and LED is sounds five beeps.

  • Page 43: User Status And Attendance Messages

    7526 User status and attendance messages Error code Action Close Front Door If you continuously get this error, then either 24 V interlock switch or 5 V interlock switch is bad. Go to “5 V interlock switch service check” on page 2-131 “24 V interlock switch removal”...
  • Page 44 7526 Error code Action Load Manual <size> If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, touching Select indicates to the printer it should search for a source with the proper size. Additional messages may include: •...
  • Page 45 7526 Error code Action 3x through 8x attendance messages 31 Defective or Missing • Reseat the specified toner cartridge. <color> Cartridge • Inspect the smart chip card contacts (A) for damage, contamination or positioning error. If damaged, contact your next level of service. •...
  • Page 46 7526 Error code Action 37 Insufficient memory • Touch Continue to print the portion of the job already stored and begin collating the rest to collate job of the job. • Cancel the current job. • If this does not fix the problem, replace the system board. See “System board removal”...
  • Page 47 7526 Error code Action 53 Unformatted Flash • Touch Continue to clear the message and continue printing. • Format the flash memory before storing any resources on it. If the error message remains, replace the flash memory. • If this does not fix the problem, replace the system board. See “System board removal”...
  • Page 48 7526 Error code Action 58 Too Many Flash Too many flash options are installed. To continue: Options 1. Turn off and unplug the printer. 2. Remove the excess flash memory. 3. Plug in the printer, and turn it on. If this does not fix the problem, replace the system board. See “System board removal”...
  • Page 49 7526 Error code Action 80 Fuser Life Warning • Touch Continue to clear the message and continue printing. • Show Me, View Supplies, and Tell Me More displays additional information. • Order a replacement fuser. When print quality is reduced, install the new fuser using the instruction sheet that comes with the replacement fuser.
  • Page 50 7526 Error code Action 82 Replace Waste • Replace the waste toner box using the instruction sheet that comes with the replacement Toner waste toner box. • Ensure that there is no interference between the waste toner box and the printer. •...
  • Page 51 7526 Error code Action 84 <color> PC Unit • Scroll down the operator panel to see if the printer is showing that all four of the PC units Missing are missing. If so, check the HVPS cable between the system board and the HVPS. Ensure that the cable is not plugged in backwards on the HVPS.
  • Page 52 7526 Error code Action • Show Me, View Supplies, and Tell Me More displays additional information. 88 <color> Cartridge • Replace the specified toner cartridge. • Touch Continue to clear the message and continue printing. • If the problem persists, replace the system board. See “System board removal”...

  • Page 53: Error Codes And Messages

    7526 Error codes and messages Error code Description Action 1xx service error codes 110.01–110.07 Mirror A mirror motor error has occurred. • POR the printer. Motor • If the error message persists, go to “110.xx— Mirror motor service check” on page 2-40.
  • Page 54 7526 Error code Description Action 146.01–146.08 Duplex motor has failed. • POR the printer. Motor Error • If the error message persists, go to “146.xx, 148.xx—Motor (MPF/duplex) error service check” on page 2-53. 147.09–147.25 Aligner motor has failed. • POR the printer. Motor Error •...
  • Page 55 7526 Error code Description Action 168.xx HCIT elevator motor error. • POR the printer. Motor Error • If the message persists, go to “168.xx—Motor (HCIT elevator) error service check” on page 2-64. 199.xx Unrecoverable RIP software error. • POR the printer. Software Error •...
  • Page 56 7526 Error code Description Action 200.25 Input sensor is made when tray 1 is • Fan media, and stack flat in the tray or installed. multipurpose feeder. • Properly set media restraints in the paper tray. Possible causes: • If clearing a paper jam does not fix the problem, •...
  • Page 57 7526 Error code Description Action 201.08 Exit sensor is never made. • Check for anything in the paper path that might cause the paper to jam. Possible causes: • The fuser exit sensor may not be functioning • Improper loading properly.
  • Page 58 7526 Error code Description Action 202.02 Exit sensor is made when printer tries • Check for anything in the paper path that might to print from an idle state. cause the paper to jam. • The fuser exit sensor may not be functioning Possible causes: properly.
  • Page 59 7526 Error code Description Action 203.09 During duplex printing retract, the exit • Check for anything in the paper path that might sensor is never made. cause the paper to jam. • The fuser exit sensor may not be functioning Possible causes: properly.
  • Page 60 7526 Error code Description Action 230.21 Duplex motor stalled. • Check for anything in the duplex paper path that might cause the paper to jam. This includes the Possible causes: paper guides in tray 1. • Obstructed duplex path • If clearing a paper jam does not fix the problem, go to “146.xx, 148.xx—Motor (MPF/duplex) •...
  • Page 61 7526 Error code Description Action 242.05 Tray 2 picked, but page failed to reach • Ensure proper media is set for the type of paper the option sensor in time. used in tray 2. • Fan media, and stack flat in tray 2. Possible causes: •...
  • Page 62 7526 Error code Description Action 242.29 Tray 2 is not ready or missing while • Make sure that tray 2 is correctly inserted. printing. • If the problem persists, go to “242.29—Paper Jam service check” on page 2-79. Possible cause is paper tray 2 assembly failure: 243.02 Tray 3 pass thru sensor made at...
  • Page 63 7526 Error code Description Action 243.17 Tray 3 detected a jam from idle. • Clear away anything in the paper path that might cause the media to jam. Possible causes: • If the problem persists, go to “243.17—Paper • Paper jam leaving page over Jam service check”...
  • Page 64 7526 Error code Description Action 244.05 Tray 4 picked, but page failed to reach • Ensure proper media is set for the type of paper the option sensor in time. used in tray 4. • Fan media, and stack flat in tray 4. Possible causes: •...
  • Page 65 7526 Error code Description Action 244.29 Tray 4 is not ready, or missing while • Make sure that tray 4 is correctly inserted. printing. • If the problem persists, go to “244.29—Paper Jam service check” on page 2-91. Possible cause is paper tray 4 assembly failure.
  • Page 66 7526 Error code Description Action 245.17 Tray 5 detected a jam from idle. • Clear away anything in the paper path that might cause the paper to jam. Possible causes: • If the problem persists, go to “245.17—Paper • Paper jam leaves a page over the Jam service check”...
  • Page 67 7526 Error code Description Action 290.02 Scanner ADF feed jam. • Remove all media present in the media path. • Check for obstructions in the media path. • If the problem persists, go to “290.01, 290.02— Scanner ADF pickup/feed jam service check” on page 2-97 290.10 Scanner static jam—scanning sensor.
  • Page 68 7526 Error code Description Action Scanner flatbed CCD carrier module Unlock the scanner flatbed CCD carrier module lock locked in home position. (scanner lock). 8xx service error messages 840.01 Scanner disabled Enable the Scanner: Scanner Error 1. Enter the Configuration Menu (press and hold 2 and 6, turn on the MFP, and release the buttons when the progress bar displays).
  • Page 69 7526 Error code Description Action 843.04 Pic roller disengage failure POR the printer, and then an 843.02 error code Scanner Failure appears. Go to “843.01, 843.02—Scanner Failure service check” on page 2-102. 844.00 Front scan module output level error. Go to “844.xx—Scanner Error—scan module Scanner Error output level error service check”...
  • Page 70 7526 Error code Description Action 902.01–902.99 Unrecoverable system software • POR the printer. Engine Software Error errors. • If the error message persists, replace the (except 902.59 and system board. See “System board removal” 902.60) on page 4-148. 902.59 RIP NVRAM MGR problem. •...
  • Page 71 7526 Error code Description Action 920.07 Narrow media sensor not connected. • POR the printer. POST Error • If the error message persists, go to “920.07— POST error service check” on page 2-109. 920.08 Exit sensor not connected. • POR the printer. POST Error •...
  • Page 72 7526 Error code Description Action 920.20 Incompatible transfer module. • POR the printer. POST Error • If the error message persists, go to “920.15, 920.20—POST—Bad transfer module NVRAM data error service check” on page 2-116. 920.21 +24 V power supply failure. •...
  • Page 73 7526 Error code Description Action 925.04 Blower has stalled. • POR the printer. Blower Error • If the error message persists, go to “925.02, 925.04, 925.06—Blower error service check” on page 2-127. 925.05 Fan has stalled. • POR the printer. Fan Error •...
  • Page 74 7526 Error code Description Action 952.01–952.99 CRC error has occurred. This is Perform a POR to clear the error. NVRAM Error recoverable. 953.01–953.99 Operator panel assembly NVRAM • POR the printer. NVRAM Failure failure. • Replace the operator panel assembly if the error message persists.
  • Page 75 7526 Error code Description Action 963.00–963.99 Memory failure. • POR the printer. Memory Failure • If the error message persists, replace the system board. See “System board removal” on page 4-148. 964.00–964,88 Download emulation CRC error. • POR the printer. Emulation Error •...

  • Page 76: Service Checks

    7526 Service checks 110.xx—Mirror motor service check CAUTION—POTENTIAL EYE INJURY: Laser Radiation—Avoid eye exposure to the beam. Always point the printhead laser down into the packaging as shown. The laser can cause damage to your eyesight or the eyesight of others.

  • Page 77: Xx, 112.Xx, 113.Xx, And 114.Xx-Printhead Error Service Check

    7526 Step Questions / actions Perform the printhead verification to check Replace the printhead. See Replace the system board. whether the new printhead will solve the “Printhead removal, “System board problem. See “Printhead verification” on installation, and removal” on page 4-148.

  • Page 78: Xx-Fuser Error Service Check

    7526 Step Questions / actions Measure the resistance across fuse F13 (A) Replace the system board. Go to step 4. on the system board. “System board removal” on page 4-148. JBIN1 JFUSER1 JFUSER1 JHVPS1 JBLW1 JSB1 JFAN1 JBOR1 JMIRR1 JOPP1 JCVR1 JCVR1 JLVPS2...
  • Page 79 7526 Step Questions / actions 1. Remove the fuser. See “Fuser assembly Replace the appropriate Go to step 3 removal” on page 4-94. cable (either the fuser AC or the fuser DC cable). See 2. Check the AC and DC autoconnects on “Fuser AC cable both the fuser and the MFP for damage.
  • Page 80 7526 Step Questions / actions Remove the rear frame cover. See “Rear Replace the fuser DC Go to step 6. frame cover removal” on page 4-38. Check cable. See “Fuser DC the cable in connector JFUSER1 (fuser DC cable removal” on cable) for proper connection to the system page 4-97.
  • Page 81 7526 Step Questions / actions Check for the following continuity between the Go to step 9. Replace the fuser DC DC autoconnect and JFUSER1 on the system cable. See “Fuser DC board. cable removal” on page 4-97. DC auto- JFUSER1 connect Pin 9 Pin 9...

  • Page 82: Xx, 920.02-Autocomp (Tray 1) Motor Error Service Check

    7526 140.xx, 920.02—Autocomp (tray 1) motor error service check Step Questions / actions 1. Turn the printer off. Replace the paper pick Go to step 2. mechanism. See “Paper 2. Remove the rear frame cover. See “Rear pick mechanism frame cover removal” on page 4-38.

  • Page 83: Xx, 906.01-906.04-Motor (Fuser) Error Service Check

    7526 142.xx, 906.01–906.04—Motor (fuser) error service check Step Questions / actions Turn the printer off, and then remove the rear Replace the cartridge Go to step 2. frame cover. See “Rear frame cover motor1/fuser motor cable. removal” on page 4-38. Check the cables in “Cartridge motor 1/ connectors JCARTP1 (A) and JCARTS1 (B) fuser cable removal”...

  • Page 84: Xx-Motor (Ep Drive Assembly Top Cartridge) Error Service Check

    7526 Step Questions / actions Measure the resistance across fuse F6 on the Replace the system board. Replace the EP drive system board. “System board assembly. See removal” on page 4-148. “Electrophotographic (EP) drive assembly removal” on page 4-70. JBIN1 JFUSER1 JHVPS1 JBLW1...
  • Page 85 7526 Step Questions / actions Remove the right cover. See “Right cover Replace the cartridge Go to step 3. removal” on page 4-39. Check the cartridge motor 1/fuser motor cable. motor 1/fuser motor cable for proper “Cartridge motor 1/ connection to the EP drive assembly, for fuser cable removal”...

  • Page 86: Xx-Motor (Ep Drive Assembly Middle Cartridge) Error Service Check

    7526 144.xx—Motor (EP drive assembly middle cartridge) error service check Step Questions / actions 1. Turn the printer off. Replace cartridge motor 2/ Go to step 2. 3 cable. See “Cartridge 2. Remove the rear frame cover. See “Rear motor 2/3 cable removal” frame cover removal”...

  • Page 87: Xx-Motor (Ep Drive Assembly Bottom Cartridge) Error Service Check

    7526 Step Questions / actions Measure the resistance across fuse F9 on the Replace the system board. Replace the EP drive system board. “System board assembly. See removal” on page 4-148. “Electrophotographic (EP) drive assembly removal” on page 4-70.. JBIN1 JFUSER1 JHVPS1 JBLW1...
  • Page 88 7526 Step Questions / actions Check the cartridge motor 2/3 cable for Replace the cartridge Go to step 3. proper connection to the EP drive assembly, motor 2/3 cable. See pinch points for the cable, and damage to the “Cartridge motor 2/3 cable or connector (A).

  • Page 89: Xx, 148.Xx-Motor (Mpf/Duplex) Error Service Check

    7526 146.xx, 148.xx—Motor (MPF/duplex) error service check Step Questions / actions Remove the front access cover assembly. Replace the front door Go to step 2. “Front access cover assembly assembly. See “Front removal. door assembly removal” on page 4-83. Is the front door assembly damaged? Is the multipurpose feeder damaged? Replace input tray.
  • Page 90 7526 Step Questions / actions Remove the right cover. See “Right cover Replace the MPF/duplex Go to step 5. removal” on page 4-39. Check the MP motor cable. See feeder/duplex motor cable for proper “Multipurpose feeder connection to the MPF/duplex motor, pinch (MPF)/duplex motor points for the cable, and damage to the cable cable removal”...

  • Page 91: Xx, 920.01-Motor (Aligner) Error Service Check

    7526 147.xx, 920.01—Motor (aligner) error service check Step Questions / actions 1. Turn the printer off. Replace the paper pick Go to step 2. mechanism. See “Paper 2. Remove the rear frame cover. See “Rear pick mechanism frame cover removal” on page 4-38.

  • Page 92: Xx-Cam Motor Error Service Check

    7526 155.xx—Cam motor error service check Step Questions / actions Turn the printer off, and then remove the rear Replace the motor driver Go to step 2. frame cover. See “Rear frame cover cable. See “Motor driver removal” on page 4-38.
  • Page 93 7526 Step Questions / actions Check the transport motor cable (A) from the Replace the transport Go to step 4. cam motor to the motor driver card (B) for motor cable. See poor connections or damage. “Transport cable removal” on page 4-170.

  • Page 94: Xx-Cod (Color On Demand) Motor Error Service Check

    7526 156.xx—COD (Color On Demand) motor error service check Step Questions / actions Turn the printer off, and then remove the rear Replace the COD Go to step 2. frame cover. See “Rear frame cover assembly. See “Color on removal” on page 4-38.
  • Page 95 7526 2-59 Diagnostic information...

  • Page 96: Xx, 161.Xx-Motor Error (Option Tray 2) Service Check

    7526 160.xx, 161.xx—Motor Error (option tray 2) service check Step Questions / actions 1. Turn the printer off. Problem resolved. Go to step 2. 2. Reseat option tray 2. 3. Bring the printer up in Diagnostics Menu (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the progress bar displays).

  • Page 97: Xx, 163.Xx-Motor (Option Tray 3) Error Service Check

    7526 162.xx, 163.xx—Motor (option tray 3) error service check Step Questions / actions 1. Turn the printer off. Problem resolved. Go to step 2. 2. Reseat option tray 3. 3. Bring the printer up in Diagnostics Menu (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the progress bar displays).

  • Page 98: Xx, 165.Xx-Motor Error (Option Tray 4) Service Check

    7526 164.xx, 165.xx—Motor Error (option tray 4) service check Step Questions / actions 1. Turn the printer off. Problem resolved. Go to step 2. 2. Reseat option tray 4. 3. Bring the printer up in Diagnostics Menu (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the progress bar displays).

  • Page 99: Xx, 167.Xx-Motor Error (Option Tray 5) Service Check

    7526 166.xx, 167.xx—Motor Error (option tray 5) service check Step Questions / actions 1. Turn the printer off. Problem resolved. Go to step 2. 2. Reseat option tray 5. 3. Bring the printer up in Diagnostics Menu (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the progress bar displays).

  • Page 100: Xx-Motor (Hcit Elevator) Error Service Check

    7526 168.xx—Motor (HCIT elevator) error service check Step Questions / actions Is the paper properly loaded in the high- Go to step 2. Fan the media, and then capacity input tray (HCIT)? stack flat in the HCIT drawer. 1. Turn the printer off. Problem resolved.

  • Page 101: 250.03-Paper Jam Error Service Check

    7526 200.11, 250.03—Paper Jam error service check Step Questions / actions Open the front access door. Turn the Go to step 2. Replace the transport belt. transport belt gear clockwise. “Transfer module removal” on page 4-168. Did the transport belt move? 1.

  • Page 102: 201.31-Paper Jam Error Service Check

    7526 201.06, 201.31—Paper Jam error service check Step Questions / actions Open the front access door. Turn the Go to step 2. Replace the transport belt. transport belt gear clockwise. “Transfer module removal” on page 4-168. Did the transport belt move? Bring the printer up in Diagnostics Menu (turn Go to step 3.
  • Page 103 7526 Step Questions / actions Remove the rear frame cover. See “Rear Replace the fuser DC Go to step 7. frame cover removal” on page 4-38. cable. See “Fuser DC cable removal” on Check the fuser DC cable in the connector page 4-97.
  • Page 104 7526 Step Questions / actions 1. Replace the fuser. Problem resolved. Replace the system board. “System board 2. Bring the printer up in the Diagnostics removal” on page 4-148. menu (turn off the printer, press and hold 3 and 6, turn on the printer.) 3.

  • Page 105: Paper Jam Error Service Check

    7526 203.09—Paper Jam error service check Step Questions / actions Open the front access door. Turn the Go to step 2. Replace the transport belt. transport belt gear clockwise. “Transfer module removal” on page 4-168. Did the transport belt move? Turn the printer off, and then remove the Replace the fuser.
  • Page 106 7526 Step Questions / actions Remove the rear frame cover. See “Rear Replace the fuser DC Go to step 6. frame cover removal” on page 4-38. cable. See “Fuser DC cable removal” on Check the fuser DC cable in the connector page 4-97.

  • Page 107: 230.05-Paper Jam Error Service Check

    7526 Step Questions / actions 1. Replace the fuser. Problem resolved. Replace the system board. “System board 2. Bring the printer up in the Diagnostics removal” on page 4-148. menu (turn off the printer, press and hold 3 and 6, turn on the printer.) 3.
  • Page 108 7526 Step Questions / actions Measure the resistance across fuse F13 on Replace the system board. Go to step 4. the system board. “System board removal” on page 4-148. JBIN1 JFUSER1 JFUSER1 JHVPS1 JBLW1 JSB1 JFAN1 JBOR1 JMIRR1 JOPP1 JCVR1 JCVR1 JLVPS2 JCARTP1...

  • Page 109: Paper Jam Error Service Check

    7526 242.02—Paper Jam error service check Step Questions / actions Has paper been fed from an input option Go to step 4. Go to step 2. before? 1. Turn the printer off. Replace the option cable. Go to step 3. “Option cable 2.

  • Page 110: 242.11-Paper Jam Service Check

    7526 Step Questions / actions Replace the option tray 2. Problem resolved. Replace the system board. “System board Does the error clear? removal” on page 4-148. 242.03, 242.11—Paper Jam service check Step Questions / actions 1. Bring the printer up in Diagnostics Menu Problem resolved.

  • Page 111: Paper Jam Service Check

    7526 242.05—Paper Jam service check Step Questions / actions Has the paper been fed from an input option Go to step 5. Go to step 2. before? 1. Bring the printer up in Diagnostics Menu Problem resolved. Go to step 3. (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the...

  • Page 112: Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the option, and lay Replace the option cable. Go to step 5. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Is tray 2 a high-capacity input tray (2,000- Go to step 7.

  • Page 113: Paper Jam Service Check

    7526 242.17—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 4. Go to step 2. before? Turn the printer off, and then remove the rear Replace the option cable. Go to step 3. frame cover.

  • Page 114: Paper Jam Service Check

    7526 Step Questions / actions Is tray 2 an high-capacity input tray (HCIT)? Replace the HCIT top Replace the complete plate. See “Top plate tray 2 option. assembly removal” on page 4-264. 242.26—Paper Jam service check Step Questions / actions 1.

  • Page 115: Paper Jam Service Check

    7526 Step Questions / actions 1. Turn the printer off. Go to step 3. Replace the transport belt. “Transfer module 2. Open the front access door. removal” on page 4-168. 3. Turn the transport belt gear clockwise. Did the transport belt move? 1.
  • Page 116 7526 Step Questions / actions 1. Turn the printer off. Replace the option cable. Go to step 3. “Option cable 2. Remove the rear frame cover. See “Rear removal” on page 4-115. frame cover removal” on page 4-38. 3. Remove the right cover. See “Right cover removal”...

  • Page 117: 243.11-Paper Jam Service Check

    7526 243.03, 243.11—Paper Jam service check Step Questions / actions 1. Bring the printer up in Diagnostics Menu Problem resolved. Go to step 2. (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the progress bar displays).

  • Page 118: Paper Jam Service Check

    7526 243.05—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 5. Go to step 2. before? 1. Bring the printer up in Diagnostics Menu Problem resolved. Go to step 3. (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the...

  • Page 119: Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the option, and lay Replace the option cable. Go to step 5. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Is tray 3 a high-capacity input option (2,000- Go to step 7.

  • Page 120: Paper Jam Service Check

    7526 243.17—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 4. Go to step 2. before? Turn the printer off, and then remove the rear Replace the option cable. Go to step 3. frame cover.

  • Page 121: Paper Jam Service Check

    7526 Step Questions / actions Is tray 3 an high-capacity input tray (HCIT)? Replace the HCIT top Replace the complete plate. See “Top plate tray 3 option. assembly removal” on page 4-264. 243.26—Paper Jam service check Step Questions / actions 1.

  • Page 122: Paper Jam Service Check

    7526 Step Questions / actions Is tray 3 a high-capacity input tray (2,000- Replace the HCIT elevator- Replace the complete sheet feeder)? up sensor. See “HCIT tray 3 option. elevator motor with sensor removal” on page 4-257. 244.02—Paper Jam service check Step Questions / actions Has paper been fed from an input option...

  • Page 123: 244.11-Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the options, and lay Replace the option cable. Go to step 4. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Replace the complete tray 4 option.

  • Page 124: Paper Jam Service Check

    7526 244.05—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 5. Go to step 2. before? 1. Bring the printer up in Diagnostics Menu Problem resolved. Go to step 3. (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the...

  • Page 125: Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the option, and lay Replace the option cable. Go to step 5. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Is tray 4 a high-capacity input option (2,000- Go to step 7.

  • Page 126: Paper Jam Service Check

    7526 244.17—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 4. Go to step 2. before? Turn the printer off, and then remove the rear Replace the option cable. Go to step 3. frame cover.

  • Page 127: Paper Jam Service Check

    7526 Step Questions / actions Is tray 4 an high-capacity input tray (HCIT)? Replace the HCIT top Replace the complete plate. See “Top plate tray 4 option. assembly removal” on page 4-264. 244.26—Paper Jam service check Step Questions / actions 1.

  • Page 128: Paper Jam Service Check

    7526 Step Questions / actions Is tray 4 a high-capacity input tray (2,000- Replace the HCIT elevator- Replace the complete sheet feeder)? up sensor. See “HCIT tray 4 option. elevator motor with sensor removal” on page 4-257. 245.02—Paper Jam service check Step Questions / actions Has paper been fed from an input option...

  • Page 129: 245.11-Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the options, and lay Replace the option cable. Go to step 4. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Replace the complete tray 5 option.

  • Page 130: Paper Jam Service Check

    7526 245.05—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 5. Go to step 2. before? 1. Bring the printer up in Diagnostics Menu Problem resolved. Go to step 3. (turn the multifunction printer off, press and hold 3 and 6, turn the MFP on, and then release the buttons when the...

  • Page 131: Paper Jam Service Check

    7526 Step Questions / actions Carefully lift the printer off the option, and lay Replace the option cable. Go to step 5. the printer on its back. “Option cable removal” on page 4-115. Check the option connector for damage. Is the connector damaged? Is tray 5 a high-capacity input option (2,000- Go to step 7.

  • Page 132: Paper Jam Service Check

    7526 245.17—Paper Jam service check Step Questions / actions Has paper been fed from an input option Go to step 4. Go to step 2. before? Turn the printer off, and then remove the rear Replace the option cable. Go to step 3. frame cover.

  • Page 133: Paper Jam Service Check

    7526 Step Questions / actions Is tray 5 an high-capacity input tray (HCIT)? Replace the HCIT top Replace the complete plate. See “Top plate tray 5 option. assembly removal” on page 4-264. 245.29—Paper Jam service check Step Questions / actions 1.

  • Page 134: Scanner Adf Cover Open Jam Service Check

    7526 Step Questions / actions 1. Remove the ADF motor side cover. See Replace the front case Reseat the cable. “ADF motor side cover removal” on assembly. See “ADF case page 4-194. assembly removal” on page 4-213. 2. Remove the ADF front side cover. See “ADF front side cover removal”...
  • Page 135 7526 Step Questions / actions Check the covers where the ADF top cover Replace the damaged Go to step 4. latches hook. cover. For the ADF motor side cover, see “ADF motor side cover removal” on page 4-194. For the ADF front side cover, see “ADF front side cover removal”...
  • Page 136 7526 Step Questions / actions Tighten the screws on the grounding cable. Go to step 7. Replace the grounding cable. Measure the resistance between the feed shaft and the ADF upper case cover metal bar. Does the resistance measure 0 ohms? Check the cabling (ADF front assembly to Go to step 8.

  • Page 137: Flatbed Cover Open Jam Service Check

    7526 Step Questions / actions Check the cabling (scanner MDC card to Replace the UICC card. Replace the cable. See scanner UICC card). “UICC card removal” “UICC cable removal” on on page 4-174 page 4-178. Is the cable damaged? 293.02—Flatbed cover open jam service check Step Questions / actions Replace the scanner ICC card.

  • Page 138: Scanner Failure-Carriage Failed To Move Service Check

    7526 Step Questions / actions Replace the scanner MDC card. See Problem resolved. Replace the system board. “Scanner ICC cable removal” on “System board page 4-245. removal” on page 4-148. Is the problem fixed? 843.00—Scanner Failure—Carriage failed to move service check Step Questions / actions Check the flatbed motor cables.

  • Page 139: Xx-Scanner Error-Scan Module Output Level Error Service Check

    7526 844.xx—Scanner Error—scan module output level error service check Step Questions / actions Check the flatbed lamp. Go to step 2. Replace the flatbed lamp. “Flatbed CCD lamp Is the lamp on brightly? assembly removal” on page 4-232. Remove the left cover. See “Left cover Go to step 3.

  • Page 140: Xx-Front Calibration Strip Error Service Check

    7526 846.xx—Front calibration strip error service check Step Questions / actions Remove the flatbed with glass cover See Replace the flatbed CCD Replace the flatbed with “Flatbed with glass cover removal” on carrier module. See glass cover. See “Flatbed page 4-201.

  • Page 141: Engine Software Error, Nvram Mgr Problem

    7526 902.59—Engine software error, NVRAM MGR problem Step Questions / actions Has the system board been recently Replace with a new Go to step 2. replaced? printhead that has never been used before. See “System board removal” on page 4-148. Has the transfer module been recently Replace with a new Go to step 3.

  • Page 142: 920.25-Transfer Module Missing Error Service Check

    7526 920.03, 920.25—Transfer Module Missing error service check Step Questions / actions Open the front access door. Reseat the Problem resolved. Go to step 2. transport cable. Does the error clear? Turn the printer off, and then remove the rear Problem resolved.

  • Page 143: Post Error Service Check

    7526 Step Questions / actions Replace the transport belt assembly. See Problem resolved. Replace the system board. “Transfer module removal” on page 4-168. “System board removal” on page 4-148. Does the error clear? 920.04—POST error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved.

  • Page 144: Post-Printhead Motor Not Connected Error Service Check

    7526 920.05—POST—printhead motor not connected error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the cables in connectors JMIRR1 (A) and JPH1 (B).

  • Page 145: Post Error Service Check

    7526 920.07—POST error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the cable in connector JTRAY1. JBIN1 JFUSER1 JFUSER1...

  • Page 146: Post-Four Toner Sensor Not Connected Error Service Check

    7526 920.09—POST—Four toner sensor not connected error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the cable in connector JHVPS1. JBIN1 JFUSER1 JHVPS1...

  • Page 147: Post-Three Toner Sensors Not Connected Error Service Check

    7526 920.10—POST—Three toner sensors not connected error service check Step Questions / actions Check all toner level sensor cables (A) If one or two of the toner Go to step 2. connected to the rear of the HVPS. level sensor are damaged: •...

  • Page 148: Post-Two Toner Sensors Not Connected Error Service Check

    7526 920.11—POST—Two toner sensors not connected error service check Step Questions / actions Check all toner level sensor cables connected If only one toner level Go to step 2. to the rear of the HVPS. sensor is damaged: • Disconnect the sensor. •...

  • Page 149: Post-One Sensor Not Connected Error Service Check

    7526 920.12—POST—One sensor not connected error service check Step Questions / actions Check all toner level sensor cables connected Replace the damaged Go to step 2. to the rear of the HVPS. sensor. See “Toner level sensor removal” on Are any of the cables damaged? page 4-157.
  • Page 150 7526 Step Questions / actions Remove the right cover. See “Right cover Replace the cartridge Go to step 4. removal” on page 4-39. motor 1/fuser cable. See “Cartridge motor 1/fuser Check for the cartridge 1/fuser motor cable for cable removal” on proper connection to the EP drive assembly, page 4-55.

  • Page 151: Post-Cartridge Motor 2 Not Connected Error Service Check

    7526 920.14—POST—Cartridge motor 2 not connected error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the cables in connector JCARTP2 (A) and JCARTS2 (B).

  • Page 152: 920.20-Post-Bad Transfer Module Nvram Data Error Service Check

    7526 920.15, 920.20—POST—Bad transfer module NVRAM data error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the transport cable in connector JTPS1 (A) JBIN1 JFUSER1...

  • Page 153: Post Error Service Check

    7526 920.16—POST error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the large printhead cable in connector JPH1.

  • Page 154: Post Error Service Check

    7526 920.17—POST error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the bin full sensor cable in connector JBIN1.

  • Page 155: Post-Cartridge Motor 3 Not Connected Error Service Check

    7526 920.18—POST—Cartridge motor 3 not connected error service check Step Questions / actions Turn the printer off and remove the rear frame Problem resolved. Go to step 2. cover. See “Rear frame cover removal” on page 4-38. Reseat the cables in connectors JCARTP2 and JCARTS2.

  • Page 156: Post-Transfer Module Stepper Motor Not Connected Error Service Check

    7526 Step Questions / actions Measure the resistance across the fuser F10 Replace the system board. Replace the EP drive on the system board. “System board assembly. See removal” on page 4-148. “Electrophotographic (EP) drive assembly removal” on page 4-70. JBIN1 JFUSER1 JHVPS1...
  • Page 157 7526 Step Questions / actions Measure the resistance across fuses F12 and Replace the system board. Go to step 4. F13 on the system board. “System board removal” on page 4-148. Is either fuse blown? Check the transport motor cable for pinch Replace the transport Go to step 5.

  • Page 158: Post Error Service Check

    7526 920.21—POST error service check Step Questions / actions Check the input voltage switch on the back of Go to step 2. Set the switch for the the low-voltage power supply (LVPS). Some proper country voltage. power supplies do not have the switch, and automatically switch.
  • Page 159 7526 Step Questions / actions Measure the resistance across fuses F5, F6, Replace the system board. Replace the low-voltage F7, F9, F10, F12, and F13 on the system “System board power supply. See “Low- board. removal” on page 4-148. voltage power supply (LVPS) removal”...

  • Page 160: Post Error Service Check

    7526 920.23—POST error service check Step Questions / actions Turn the printer off, and then remove the rear Problem resolved. Go to step 2. frame cover. See “Rear frame cover removal” on page 4-38. Reseat the cable in connector JDX1. JBIN1 JFUSER1 JHVPS1...

  • Page 161: Post Service Check

    7526 920.26—POST service check Step Questions / actions Open the top access cover. Replace the top cover Go to step 2. sensor. Is the top cover sensor damaged? 1. Turn the printer off. Replace the top cover Go to step 3. sensor.

  • Page 162: 920.28, 920.29-Post (Power On Self Test) Service Check

    7526 920.27, 920.28, 920.29—POST (power on self test) service check Step Questions / actions Is the specified option the 550-sheet tray? Replace the 550-sheet tray Go to step 2. with a new 550-sheet tray option. Is the specified option the special media tray? Replace the special media Go to step 3.

  • Page 163: 925.04, 925.06-Blower Error Service Check

    7526 925.02, 925.04, 925.06—Blower error service check Step Questions / actions Turn the printer off, and remove the rear Replace the blower. See Go to step 2. frame cover. See “Rear frame cover “Cartridge cooling fan removal” on page 4-38. removal”...

  • Page 164: Xx, 947.Xx-Transfer Roll Error Service Check

    7526 945.xx, 947.xx—Transfer roll error service check Step Questions / actions Replace the transfer module. See “Transfer Problem resolved. Replace the original module removal” on page 4-168. POR the transfer module. printer. Go to step 2. Did the error clear? Turn the printer off, and then remove the rear Replace the HVPS cable.
  • Page 165 7526 Step Questions / actions Remove the HVPS. See “High-voltage Go to step 5. Replace the transfer power supply (HVPS) removal” on contact assembly. page 4-100. Check for continuity between the contacts (yellow1 and yellow2, cyan1 and cyan2, magenta1 and magenta2, or black1 and black2) on the transfer contact assembly.

  • Page 166: 950.29-Eprom Mismatch Failure

    7526 950.00–950.29—EPROM mismatch failure Warning: When replacing any one of the following components: • Scanner MDC card or flatbed scanner • System board Replace only one component at a time or the MFP will be rendered inoperable. Replace the required component, and bring the MFP up in Diagnostic Menu (see “Accessing test and diagnostic procedure menus”...

  • Page 167: Xx-System Board Failure Service Check

    7526 956.xx—System board failure service check Step Questions / actions Turn the printer off, and remove the rear Replace the system board. Reseat the cable. frame cover. See “Rear frame cover “System board removal” on page 4-38. removal” on page 4-148.
  • Page 168 7526 Step Questions / actions Turn the printer off, and remove the rear Replace the 5 V interlock Go to step 3. frame cover. See “Rear frame cover switch. See “5 V interlock removal” on page 4-38. switch cable removal” on page 4-48.

  • Page 169: Interlock Switch Removal

    7526 24 V interlock switch removal Step Questions / actions Is the 24 V switch damaged? Replace the 24 V interlock Go to step 2. switch. See “24 V interlock switch removal” on page 4-50. Turn the printer off, and remove the rear Replace the 24 V interlock Go to step 3.

  • Page 170: Adf Exit Sensor Service Check

    7526 ADF exit sensor service check Step Questions / actions Make sure the mirror is clean: Go to step 2. Slightly dampen a soft, lint- free cloth with water, and 1. Turn the printer off. clean the mirror. 2. Open the ADF front cover. 3.

  • Page 171: Adf Input Sensor Service Check

    7526 ADF input sensor service check Step Questions / actions 1. Turn the printer off. Replace the ADF case Go to step 2. assembly. See “ADF case 2. Open the ADF front cover. assembly removal” on page 4-213. Is the flag (A) damaged? 1.

  • Page 172: Adf Jam Sensor Service Check

    7526 ADF jam sensor service check Step Questions / actions 1. Turn the printer off. Replace the ADF case Go to step 2. assembly. See “ADF case 2. Open the ADF front cover. assembly removal” on 3. Turn the wheel. page 4-213.

  • Page 173: Adf Skew Sensor Service Check

    7526 ADF skew sensor service check Step Questions / actions 1. Turn the printer off. Replace the ADF case Go to step 2. assembly. See “ADF case 2. Open the ADF front cover. See “ADF assembly removal” on front cover removal” on page 4-190.

  • Page 174: Adf Scanning Sensor Service Check

    7526 ADF scanning sensor service check Step Questions / actions Remove the ADF motor side cover. See Replace the ADF. See Reseat connector. “ADF motor side cover removal” on “ADF removal (entire)” page 4-194. on page 4-210. Are the connectors seated correctly? Bubble sensor service check Step Questions / actions...
  • Page 175 7526 Step Questions / actions Place a voltmeter between fuser DC Go to step 5. Go to step 4. autoconnect pin 3, and ground (pin 6). Does the meter read +5 V dc? Place a voltmeter between the JFUSER1, pin Replace the system board.

  • Page 176: Dead Printer Service Check

    7526 Dead printer service check A dead printer is a condition where the display is blank, the LED on the operator panel is off, no fans turn, no motors turn, and the fuser lamp does not come on. If a 550-sheet option assembly is installed, remove the option, and check the base printer for correct operation. If the base printer operates correctly, replace the 550-sheet option assembly.

  • Page 177: Exit Sensor Service Check

    7526 Step Questions / actions 1. Turn the printer off. Contact your next level of Go to step 7. support. Replace the faulty 2. Disconnect cables J5, JCARTS1. part. JCARTS2, JDVR1, JFDPCK1, JFUSER1, JINT1, JOPT1, and JTLB%1. 3. Connect the JLVPS2 cable to the system board.
  • Page 178 7526 Step Questions / actions Place a voltmeter between the fuser DC Go to step 6. Go to step 5. autoconnect pin 8 and ground (pin 6). Does the meter rear +5 V dc? Place a voltmeter between the connector Go to step 6.

  • Page 179: Input Sensor Service Check

    7526 Input sensor service check Step Questions / actions Is the input sensor flag damaged? Replace the paper pick Go to step 2. mechanism. See “Paper pick mechanism assembly removal” on page 4-117. Turn the printer off, and then remove the rear Replace the paper pick Go to step 3.

  • Page 180: Networking Service Check

    Have the network administrator verify that the device is using the correct SSID, and wireless security protocols. For more network troubleshooting information, consult the Lexmark Network Setup Guide. Step...

  • Page 181: Operator Panel Service Check

    7526 Step Questions / actions Try using a different ethernet cable. Problem resolved. Go to step 14. Did this remedy the situation? Have the network administrator check the Replace the system board. Contact the network network drop for activity. “System board administrator.
  • Page 182 7526 Operator panel display blank, five beeps, and LED is off Service tip: The printer has detected a problem with the system board, the operator panel assembly cable (part of the top cover access assembly), or the operator panel assembly if POST does not complete. The printer emits five beeps, and then sticks in a continuous pattern until the printer is turned off.

  • Page 183: Print Quality Service Check

    7526 Operator panel display all diamonds, five beeps Step Questions / actions Check the operator panel assembly cable. Replace the top access Go to step 2. cover assembly. See “Top Is the cable damaged? access cover assembly removal” on page 4-41.
  • Page 184 7526 Print quality—background Service tip: Some background problems can be caused by rough papers, non-Lexmark toner cartridges or if the media texture is set to the rough setting. Some slick or coated papers may also cause background problems. Some problems occur with printers that run a large amount of graphics in a humid environment.
  • Page 185 7526 Print quality—blank page Step Questions / actions Is all the packing material for the Go to step 2. Remove the packing photoconductor unit in question removed? material. Replace the photoconductor unit for the color Problem resolved. Go to step 3. in question.
  • Page 186 7526 Step Questions / actions Turn off the printer and check the continuity of Go to step 7. Replace the cable the HVPS cable. assembly. Pin 23 Pin 1 Pin 24 Pin 23 Pin 2 Pin 24 Pin 2 Pin 1 Is there continuity? Replace the HVPS.
  • Page 187 7526 Print quality—horizontal line The photoconductor unit is defective. Replace the photoconductor unit. Print quality—insufficient fusing Step Questions / actions Is the fuser properly installed? Go to step 2. Install the fuser properly. Replace the fuser. See “Fuser assembly Problem resolved. Replace the LVPS.
  • Page 188 7526 Print quality—residual image Service tip: Install a new print cartridge if available before doing this service check. Residual image can be caused by the photoconductor, cleaning blade, and other parts inside the print cartridge. Step Questions / actions Is there any toner contamination on the fuser Replace the fuser.
  • Page 189 7526 Step Questions / actions Turn the printer off, and then check the Go to step 4. Replace the cable continuity of the HVPS cable. assembly. Pin 23 Pin 1 Pin 24 Pin 23 Pin 2 Pin 24 Pin 2 Pin 1 Is there continuity? Replace the HVPS.
  • Page 190 7526 2-154 Service Manual...

  • Page 191: Diagnostic Aids

    7526 3. Diagnostic aids This chapter explains the tests and procedures to identify printer failures and verify repairs have corrected the problem. Accessing test and diagnostic procedure menus There are different test and diagnostic menus that can be accessed during POR to identify problems with the multiple function printer.
  • Page 192 7526 Network SE menu While in Network/Ports Menu (Menus—Network/ The Network SE menu contains Ports—Standard Network—STD NET SETUP), advanced network menu tools. press and hold 9, 7, and 6. Fax SE menu From the HomePrime screen, press **411 SE menu From a browser, add “/se”...

  • Page 193: Diagnostics Menu

    7526 Diagnostics menu Diagnostics menu structure When the Diagnostics menu is entered, each item displays on the operator panel. When a diagnostic test is selected from the main menu, a sub menu displays and each individual test displays in the order shown. Any options that are referred to in the menus are displayed when the option is installed.
  • Page 194 7526 MOTOR TESTS (order differs depending upon model) Align Motor Test “General motor tests procedures” on page 3-12. Cart 1 Cart 2 Cart 3 DUPLEX Transfer Belt Tray 1 PRINT TESTS Tray 1 “Input source tests” on page 3-13. Tray 2 (if installed) Tray 3 (if installed) Tray 4 (if installed) Tray 5 (if installed)
  • Page 195 7526 PRINTER SETUP Defaults “Defaults” on page 3-23. Prt Color Page Count “Page Counts” on page 3-24. Prt Mono Page Count Perm Page Count Serial Number “Serial Number” on page 3-24. Engine Setting 1 through 4 “Engine Setting 1 through 4” on page 3-24.

  • Page 196: Registration

    7526 Registration Note: If you need to perform alignment or registration, see “Printhead alignment” on page 4-9. The following information is meant to explain the uses for the menu items. Print registration makes sure the black printing is properly aligned on the page. This is one of the steps in aligning a new printhead.
  • Page 197 7526 Print registration To set print registration: Touch REGISTRATION from the Diag Menu. Touch Quick Test. The message Quick Test Printing… appears on the display. Note: Retain this page to determine the changes you need to make to the margin settings. Touch the green arrow next to the margin setting you need to change.
  • Page 198 7526 Quick Test The Quick Test contains the following information: • Print registration settings • Alignment diamonds at the left, right, top and bottom • Horizontal lines to check for skew • General printer information, including current page count, installed memory, serial number, and code level. To print the Quick Test page: Note: Print the Quick Test Page on letter or A4 paper.

  • Page 199: Scanner Tests

    7526 Scanner Tests ASIC Test This test initiates a scan of the scanner ASIC memory. Touch SCANNER TESTS in Diag Menu. Touch ASIC Test. The results will be displayed as either ASIC Test Passed or ASIC Test Failed. To clear the results, press Stop ( Feed Test The feed test scans and feeds continuously from either the ADF or the flatbed, depending on whether or not paper is placed in the ADF.

  • Page 200: Sensor Tests

    7526 Sensor Tests Tests to evaluate the scanner sensors in the ADF and the flatbed (FB). To view the sensor states: Touch SCANNER TESTS in Diag Menu. Touch Sensor Test. A screen similar to the one below will display. ADF Paper Present FB Cover Open Home Sensor Skew Sensor...

  • Page 201: Alignment Menu

    7526 Sensor Test descriptions (under Scanner Tests) Sensor State Description Paper FB Long Legal paper is not present on the flatbed, or the scanner is not closed Legal paper is present on the flatbed, is covering the third length sensor, and the scanner cover is closed Paper ADF Long Paper not present in the ADF, or positioned over the ADF bin sensor...

  • Page 202: Motor Tests

    7526 Look at the coarse and fine adjustments on the top left of the page, and then enter the best number for the top adjustment in the T space. Transfer this number over to the computation area for Z. On the touch panel, select Top Margin. Use to decrease or to increase the computed value for T, and then touch Submit.

  • Page 203: Print Tests

    7526 Setup requirements Values in Motor test Notes Top cover Lower door menu position position Not applicable Closed* Reverse Multipurpose feeder—Remove the optional tray to avoid paper jams while performing this test. *If this test is run with the lower door open, perform the following actions in order to activate the motor power: Remove the right side cover and...
  • Page 204 7526 To run the Print Test Page: Touch PRINT TESTS from the Diag Menu. Select the media source by touching the green arrow next to one of the items below: Tray 1 Tray 2 (if installed) Tray 3 (if installed) Tray 4 (if installed) Tray 5 (if installed) Multi-Purpose Feeder (if installed)

  • Page 205: Hardware Tests

    7526 This test may be printed from either Configuration Menu or the Diagnostics Menu. To run the print quality pages from the Diagnostics mode, select PRINT TESTS and Print Quality Pgs from the menu. Once the test is started, it cannot be canceled. When the test pages print, the printer returns to the original screen. To run the Print Quality Test Pages, select Prt Quality Pgs from PRINT TESTS, and then touch Back.

  • Page 206: Dram Test

    7526 DRAM Test This test checks the validity of DRAM, both standard and optional. The test writes patterns of data to DRAM to verify that each bit in memory can be set and read correctly. To run the DRAM Test: Touch DRAM Test from HARDWARE TESTS in Diag.
  • Page 207 7526 Any of the following explanations for a serial wrap test failure may display: • Receive Status Interrupt Error • Status Error • Receive Data Interrupt Error • Transmit Data Interrupt Error • Transmit Empty Error • Threshold Error • Receive Data Ready Error •...

  • Page 208: Duplex Tests

    7526 Duplex Tests Quick Test (duplex) Note: Before you set the duplex top margin, be sure to set the skew and alignment. See “Printhead alignment” on page 4-9. This test prints a duplex version of the Quick Test that can be used to verify the correct placement of the top margin on the back side of a duplex page.

  • Page 209: Print Test (Duplex)

    7526 Print Test (duplex) This test provides service personnel with a way to verify the function of the printer’s duplex hardware. After the user selects this test, the device automatically executes a continuous print test that generates a duplexed, color output page.
  • Page 210 7526 Top Margin (duplex) This setting controls the offset between the first scan line on the front of the duplex page and the first scan line on the back of the page. Therefore, be sure to set the top margin in REGISTRATION before setting the duplex top margin.

  • Page 211: Sensor Tests

    7526 Sensor Tests There are two groups of sensors tests, static sensors and dynamic sensors. To run the Sensor Test: Touch SENSOR TESTS in Daig Menu. Select either Static Sensors or Dynamic Sensors. Sensor Tests Static Sensors Dynamic Sensors • For static sensors—view the current status.

  • Page 212: Printhead Tests

    7526 Sensors (continued) Sensor type Sensor name Possible values Sensor activation M Toner Open/Closed Remove the magenta toner cartridge. Shine a flashlight on the toner level sensor. The sensor should change state. C Toner Open/Closed Remove the cyan toner cartridge. Shine a flashlight on the toner level sensor.

  • Page 213: Printer Setup

    7526 Disk Test/Clean Warning: This test destroys all data on the disk and should not be attempted on a good disk. This test may run approximately 1½ hours depending on the disk size. To run the Disk Test/Clean Test: Touch DEVICE TESTS in the Daig Menu. Touch Disk Test/Clean.

  • Page 214: Page Counts

    7526 Page Counts You can view, but not change any of the three counts displayed under PAGE COUNTS. The view the Prt Color Pg Count, the Prt Mono Pg Count, or the Perm Page Count: Touch PRINTER SETUP in Diag Menu. The Printer Color Pg Count, Prt Mono Pg Count, and then the Perm Page Count are displayed.
  • Page 215 7526 Configuration ID The two configuration IDs are used to communicate information about certain areas of the printer that cannot be determined using hardware sensors. The configuration IDs are originally set at the factory when the printer is manufactured. However, the servicer may need to reset Configuration ID 1 or Configuration ID 2 whenever the system board is replaced.

  • Page 216: Ep Setup

    7526 Reset color calibration (Reset Color Cal) The Reset Color Cal enables the alignment of the color planes using pre-programed values. Automatic Color Adjust Calibration may be more effective. Touch PRINTER SETUP in the Diag Menu. Touch Reset Color Cal. Resetting displays.

  • Page 217: Reports

    7526 Fuser temperature (Fuser Temp) This adjustment can be used to help solve some customer problems with paper curl on low grade papers and problems with letterheads on some types of media. To adjust the fuser temperature: Touch EP SETUP from Diag Menu. Touch the left or right arrows beside Fuser Temp to toggle between Low, Normal, or High.

  • Page 218: Event Log

    Page counts for most errors • Additional debug information in some cases The printed event log can be faxed to Lexmark or your next level of support for verification or diagnosis. To print the event log: Touch EVENT LOG from Diag Menu.

  • Page 219: Exit Diagnostics

    7526 Clear Log Use Clear Log to remove the current information in the Event Log. This affects both the viewed log and the printed log information. Touch EVENT LOG in Diag Menu. Touch Clear Log. Touch YES to clear the Event Log or touch NO to exit the Clear Log menu. If YES is selected, Deleting EVENT LOG displays on the screen.

  • Page 220: Configuration Menu (Config Menu)

    7526 Configuration menu (CONFIG MENU) Available tests The tests display on the operator panel in the order shown. Not all menus appear, depending upon the configuration of your multiple function printer. For example, if you do not have a hard disk installed, then Disk Encryption and Wipe Disk will not appear.

  • Page 221: Reset Fuser Count

    7526 Require Standby “Require Standby” on page 3-46. LES Applications “LES Applications” on page 3-46. Key Repeat Initial Delay “Key Repeat Initial Delay” on page 3-46. Key Repeat Rate “Key Repeat Rate” on page 3-46. Clear Custom Status “Pel Blurring” on page 3-47.

  • Page 222: Color Lock Out

    7526 Color Lock Out Select On when printing for extended periods with only black toner. This saves the color toner cartridges (cyan, magenta, and yellow) and photoconductor units from excessive wear. In addition to setting the values, the cyan, magenta, and, yellow toner cartridges and their matching photoconductor units must be removed from the printer.

  • Page 223: Color Trapping

    7526 Event Log This menu item lets the system support person print a limited set of the information contained in the Diagnostics mode version of the printed Event Log. For a sample of a Diagnostics Menu Event Log printout, see “Event Log”...

  • Page 224: Panel Menus

    7526 Panel Menus Lets the system support person lock users from Administrative menus. The Menu icon will not appear on the operator pane Selecting On (the default) prevents users from accessing menus. Off allows users to access the menus. The default value is set to On. Menus secured by password access are blocked, but the security access settings are retained if Panel Menus is set to On.

  • Page 225: Factory Defaults

    7526 Factory Defaults This menu item resets the majority of printer values back to their factory default settings. Warning: This selection cannot be reversed, so this operation should only be used as a last resort to fix any printer problem. When factory default settings are restored: •...

  • Page 226: Numpad Job Assist

    7526 NumPad Job Assist This setting determines whether or not a user can configure and initiate a job using the operator panel buttons. When this is set to On, a user can choose a function, such as copy, fax, or so forth, and then enter specific values for a limited number of settings and initiate the job with a series of key presses.

  • Page 227: Fax Storage Location

    7526 Fax Storage Location This setting only appears if a hard disk is installed. Selections are NAND or Disk. Touch Fax Storage Location on the Config Menu. Touch the left arrow or the right arrow to toggle between NAND and Disk. Touch Submit.

  • Page 228: Scanner Manual Registration

    7526 Scanner Manual Registration This item is used to manually register the flatbed and ADF on the MFP scanner unit. Registration should be performed whenever the ADF unit, flatbed unit, or controller card are replaced. To manually adjust the scanner: Touch Scanner Manual Registration.
  • Page 229 7526 Touch ADF Front. ADF Front Horizontal Adjust Top Margin Adjust the Left Margin and/or the Top Margin to match the original. Selection Effect Horizontal Adjust • Decrease the value to move the margin to the left • Increase the value to move the margin to the right Top Margin •...

  • Page 230: Disable Scanner

    7526 Disable Scanner If a scanner is not working, the scanner can be disabled, allowing the user to continue using the printer portion of the multiple function printer. Disable disables the entire scanner (ADF and flatbed), and then users attempting to use the scanner function receive Scanner disabled by administrator message.

  • Page 231: Enforce Color Order

    7526 Enforce Color Order This setting gives the system support person the ability to enforce where the color cartridges may be placed, and if messages appear when cartridges are in the wrong location. When On (default) is selected, the printer lets users place each toner cartridge in only its specified slot. For instance, the Magenta toner cartridge must be in the Magenta slot.

  • Page 232: Motor Calibration

    7526 Motor Calibration This setting synchronizes the aligner and fuser motor speeds with the transfer belt speed to ensure that the output is printed correctly. Note: This test should be run at 600 dpi resolution and with duplex disabled. To run the Motor Calibration: Touch Motor Calibration in the Config Menu.

  • Page 233: Action For Prompts

    7526 To change the settings for Env Prompts: Touch Envelope Prompts in the Config Menu. Touch the left or right arrow to toggle between Auto, Multi-Purpose Feeder, and Manual Envelope. Touch Submit. Submitting changes… is displayed. You are automatically returned to the Configuration main menu. Action for Prompts This setting gives the user the option of having the printer resolve change prompt situations without requiring any user assistance.

  • Page 234: Disk Encryption

    7526 Disk Encryption Controls whether the printer encrypts the information that it writes to the hard disk. Warning: When the value for Disk Encryption, the printer completely formats the hard disk which means that all information on the disk is deleted. If an encrypted disk is removed from the printer and another disk is installed, the Disk Corrupted.

  • Page 235: Wipe Disk

    7526 Touch Yes. Warning: To prevent damage to your disk, do not turn the MFP off while the following displays. Encrypting Disk DO NOT POWER OFF Touch Back to return to the main menu. A graphic appears, showing: The message Encrypting Disk or Formatting Disk •...

  • Page 236: Font Sharpening

    Touch the left or right arrow to toggle between On and Off. Touch Submit. LES Applications Enables or disables Lexmark Embedded Solutions (LES) applications. The default is Enable. To change the setting: Touch LES Applications in the Config Menu. Touch the left or right arrow to toggle between Enable and Disable.

  • Page 237: Clear Custom Status

    7526 Clear Custom Status Executing this operation erases any strings that have been defined by the user for the Default or Alternate custom messages. To clear custom strings: Touch Clear Custom Status in the Config Menu. Touch Clear Custom Status again to confirm. Clear Custom Status...

  • Page 238: Service Engineer (Se) Menu

    To enter the SE Menus: From browser, add “/se” to device’s IP address (for example: http://123.456.7.8/se). Print SE Menus General Copyright Displays copyright information. Lexmark Forms Mode On or Off Code Revision Info Network Code Level Displays network code level. Network Compile Info Display network compile information.

  • Page 239: Front Cover Locked In Place

    7526 Front cover locked in place The front door locks during certain Busy events, and unlocks when those events are complete. This is a normal function. You can hear the door lock into place when one of these events take place. However, if the printer is turned off, or has an error while the front door is locked (for example, while printing or calibrating), the front door may not unlock.
  • Page 240 7526 Open the top cover. Remove the screw (C) from the inside left cover. Press the waste toner release latch (D), swing the front of the waste toner assembly away from the printer, and remove. Remove the two screws (E). Press the locking tab (F), slide the cover down.
  • Page 241 7526 Grasp the side at the point shown, and disconnect the tab on the upper edge. Push down with your thumb on the outside while pulling up with the fingers to remove the cover. Warning: Be careful not to damage the two small locking tabs (G). Lift the rear of the left cover out, and rotate it out of position toward the front.

  • Page 242: Printhead Verification

    7526 Printhead verification Before you begin, you can verify that the printhead is the failing FRU by following this procedure: Turn the printer off, remove the power cord from the outlet, then remove all cords and cables from the printer before beginning. Locate the printer on a corner of a work area so the front and back can be accessed.
  • Page 243 7526 Remove the rear frame cover. Loosen the eight screws (A). Lift the rear frame cover, and remove. 3-53 Diagnostic aids...
  • Page 244 7526 If present, remove the hard disk. Remove the two screws (B), and disconnect the hard disk from the system board (C). Pull the hard disk straight out to pop the hard disk standoffs free of the system board. 3-54 Service Manual...
  • Page 245 7526 Carefully disconnect the printhead ribbon (D) and the mirror motor cables (E) from the system board, and carefully connect the printhead ribbon and mirror motor cables from the new printhead into the system board. 3-55 Diagnostic aids...
  • Page 246 7526 Use the packaging that came with the printhead FRU to prop the printhead up. Note: It is important to position the laser in the printhead facing down into the packaging as shown. CAUTION—POTENTIAL EYE INJURY: Laser Radiation—Avoid eye exposure to the beam. Always point the printhead laser down into the packaging as shown.

  • Page 247: Paper Jams

    7526 Paper Jams Error jam locations The following illustration shows the location and error codes generated for specific paper jams and the corresponding locations of these jams. ADF and flatbed scanner 3-57 Diagnostic aids...
  • Page 248 7526 Printer base 3-58 Service Manual...

  • Page 249: Clearing Jams

    7526 Clearing jams By carefully selecting paper and loading it properly, you can avoid most jams. If jams do occur, follow the steps outlined in this section. To clear a jam message and resume printing, clear the entire paper path, and then touch Continue.
  • Page 250 7526 Message See: 24x Paper jam, check [area name] “24x paper jam” on page 3-67 24x Paper jam, [x] pages jammed 250 Paper jam, check [area name] “250 paper jam” on page 3-68 250 Paper jam, [x] pages jammed 290 Scanner jam, remove all originals from the “290–294 paper jams”...
  • Page 251 7526 Pull the jammed paper up and out to remove it from behind the toner cartridge area. Note: Make sure all paper fragments are removed. Close the lower front door. Close the upper front door. Touch Continue. 200–201 paper jams Open the upper front door.

  • Page 252: Paper Jam

    7526 201 paper jam Open the upper front door, and then open the lower front door. Warning: Potential Damage—To avoid overexposing the photoconductors, do not leave the front doors open for more than 10 minutes. CAUTION—HOT SURFACE: The inside of the printer might be hot. To reduce the risk of injury from a hot component, allow the surface to cool before touching.
  • Page 253 7526 202 paper jam If the paper is visible in the standard exit bin, then grasp the paper and pull it away from the bin. Paper jam under the fuser Open the upper front door, and then open the lower front door. Warning: Potential Damage—To avoid overexposing the photoconductors, do not leave the front doors open for more than 10 minutes.
  • Page 254 7526 Paper jam behind the fuser Open the upper front door, and then open the lower front door. Warning: Potential Damage—To avoid overexposing the photoconductors, do not leave the front doors open for more than 10 minutes. CAUTION—HOT SURFACE: The inside of the printer might be hot. To reduce the risk of injury from a hot component, allow the surface to cool before touching.
  • Page 255 7526 203 paper jam Grasp paper that is visible in the standard exit bin, and pull it away from the bin. Open the upper front door. CAUTION—HOT SURFACE: The inside of the printer might be hot. To reduce the risk of injury from a hot component, allow the surface to cool before touching.
  • Page 256 7526 Pull the jam straight up to remove it. Pull out on the release tabs to allow the front door to split. Pull straight out to remove any jammed paper. Close the lower front door, and then close the upper front door. Reinsert Tray 1.
  • Page 257 7526 24x paper jam Paper jammed in Tray 1 Open Tray 1, and then pull the jammed pages straight up and out. After removing the tray, the front door may need to be opened to access the jam. Close Tray 1. Touch Continue.
  • Page 258 7526 Paper jammed in one of the optional trays Open the specified tray, and then pull the jammed pages out. After removing the tray, the tray above may need to be opened to access the jam. Close the tray. Touch Continue. 250 paper jam Press the paper release lever, and then remove the jammed pages from the multipurpose feeder.
  • Page 259 7526 290–294 paper jams Remove all original documents from the ADF. Open the ADF cover, and then remove any jammed paper. Close the ADF cover. Open the duplex cover, and then remove any jammed paper. Open the scanner cover, and then remove any jammed pages. Close the scanner cover.
  • Page 260 7526 3-70 Service Manual...

  • Page 261: Repair Information

    7526 4. Repair information CAUTION—POTENTIAL INJURY: The printer weight is greater than 97 lbs (44kg), and requires three or more trained personnel to lift safety. CAUTION—POTENTIAL INJURY When you see this symbol, there is a danger from hazardous voltage in the area of the product where you are working.

  • Page 262: Handling Esd-Sensitive Parts

    7526 Handling ESD-sensitive parts Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent damage to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such as turning off power before removing electronic cards: •...

  • Page 263: Screw And Retainer Identification Table

    7526 Screw and retainer identification table The following table contains screw types and retainers, locations, and quantities necessary to service the printer. Pay careful attention to each screw type location when doing removals. You must install the correct screw type in each location during reassembly. Sizes are as close to actual as possible, as long as the printout is not scaled or resized.
  • Page 264 7526 Screw identification table (continued) Screw type Location 18B0832 Taptite M3 L6 5 V interlock switch to rightside frame PANHD Card support plate to upper plate Card support plate to lower plate Card support plate (and printhead ground) to leftside frame Card support plate to rightside frame Cartridge left guide assembly to leftside [late (interior side of plate assembly)
  • Page 265 7526 Screw identification table (continued) Screw type Location 18B1236 Plastite panhead ADF open sensor to ADF M3x6 CCD belt to flatbed Sliding rod 18B2302 Machine M2.6 MP feeder/duplex drive motor to rightside plate L3-3.5 18B2315 Machine M3 Printhead PANHD L35 27S2836 Taptite M3 L6 Rear cover frame to frame...
  • Page 266 7526 Screw identification table (continued) Screw type Location 88A0003 Machine M3X0.5- Printhead 6G 8L 88A0095 M2.5x10 Machine 5 V interlock switch actuator assembly 24 V interlock switch and shield to rightside frame 88A0133 Plastite M3x8 ADF front cover ADF handle cover ADF motor cover ADF upper front cover Cave LED lens...
  • Page 267 7526 Screw identification table (continued) Screw type Location 88A0234 Taptite M3x10 Motor assembly to ADF 88A0293 Plastite M2.2 L5 Contact spring cap to left guide assembly 88A0312 Plastite M2.9 L6 Backup springs to reference edge plate assembly Cartridge cooling fan duct to top cover Cartridge left guide assembly to leftside plate assembly (exterior side of plate assembly) Cover mount to rightside plate...
  • Page 268 7526 Screw identification table (continued) Screw type Location 88A0324 M3.5X1.34 PANHD Door cap to door assembly EP drive to rightside plate 88A0412 M2.9x5.2 Plastite Door links to top access door cover Fuser retract link to top access door GS COD bellcranks to guide NGS COD bellcranks to guide Top cover links to top access door links Top cover links to top cover...

  • Page 269: Adjustments

    7526 Adjustments Printhead alignment Overview When aligning the printhead, it is important to keep in mind that the printhead mounting screws should be initially loose enough to just hold the printhead in the printer. This allows the pages to be printed that will be used to align the black plane to the printer frame and also allows skew adjustment with the printhead alignment screw.
  • Page 270 7526 Remove the toner cartridges. Loosen the printhead mounting screws (D). Reinstall the transfer module with the photoconductor units still attached. Reconnect the transfer module cable. Replace the toner cartridges. Close the front access door. Close the top access door. Connect the electrical cord into the printer.
  • Page 271 7526 Touch Quick Test. A page similar to this one prints: 4-11 Repair information...
  • Page 272 7526 Adjust the printhead alignment screw (F) to adjust the skew and straighten the image on the printout. If the top right alignment marks are lower than the top left alignment marks, rotate the alignment screw counterclockwise a full revolution, and print the Quick Test page. Repeat adjusting the screw and printing the Quick Test page until the top alignment marks are the same distance from the top of the media.
  • Page 273 7526 When the top right and top left alignment marks are both showing and are even on the page, the skew is aligned. Straight Skewed Tighten the printhead mounting screws. Turn off the printer. Disconnect the power cord from the electrical outlet. Disconnect the transfer module cable.
  • Page 274 7526 Registration (black) Top Margin Reconnect the power cord to the electrical outlet, but do not turn on the printer yet. Enter Diagnostic mode (press and hold 3 and 6, turn on the printer, and release the buttons when the progress bar appears).
  • Page 275 7526 Bottom Margin Adjust the bottom margin until the points of the bottom margin alignment marks are visible and touching the edge of the paper. • The right arrow increases the value and moves the bottom alignment marks up the page. •...
  • Page 276 7526 Alignment (cyan, yellow, and magenta) Touch Back until you reach the top menu, and touch Alignment Menu. Select Cyan. Cyan Top Margin Left Margin Right Margin Skew Quick Test Touch the left or right arrows to set Top Margin to zero. Do the same for Left Margin, Right Margin, Bottom Margin, Skew, and Bow.
  • Page 277 7526 Determine the line under Fine Adjustment that is closest. If the value is beyond the Fine Adjustment scale, use either of the Coarse Adjustment scales. Enter the number determined from the Fine Adjustment scale or the Coarse Adjustment scales on the part of the page for the “T”...
  • Page 278 7526 Repeat this process for skew (Z). Don't forget to subtract the T value and add the current cyan Z value to obtain the new skew (Z) value. An example is shown below: Continue to follow the directions on the bottom of the first page to find the Cyan Top Margin (T), the Skew (Z), and on the second page of the Quick Test page, the Left Margin (L), Right Margin (R), and Bow (P).

  • Page 279: Printer Removal Procedures

    7526 Printer removal procedures Precautions to take before maintenance work Do not implement any operation, removal, or modification and so on, which is not presented in this manual. Turn the printer power off and unplug the power cable from the outlet prior to starting removals or checks.

  • Page 280: Multifunction Printer Removals

    7526 Multifunction printer removals Front access cover assembly removal See Front access cover assembly for the part number for the models you need on page 7-3. Remove the paper tray. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access door cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
  • Page 281 7526 Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side. 4-21 Repair information...
  • Page 282 7526 Close the front access door assembly. Remove the two screws (G) that attach the pivot pin to the front access door cover assembly. Remove the bracket (H). Remove the front access cover assembly. 4-22 Service Manual...

  • Page 283: Left Cover Removal

    7526 Left cover removal “Left cover” on page 7-3 for the part number. Remove the left cover with the left door cover attached. Remove the rear cover. See “Rear cover removal” on page 4-37. Remove the waste toner assembly. See “Waste toner assembly removal”...
  • Page 284 7526 Remove the two screws (B). Press the locking tab (C), slide the cover down. Grasp the side at the point shown, and disconnect the tab on the upper edge. Push down with your thumb on the outside while pulling up with the fingers to remove the cover. Warning: Be careful not to damage the two small locking tabs (D).

  • Page 285: Left Door Cover Removal

    7526 Left door cover removal Open the left door cover. Lift up to disengage the hinges. Remove the left door cover. 4-25 Repair information...

  • Page 286: Operator Panel Assembly Removal

    7526 Operator panel assembly removal “Operator panel assembly, with card” on page 7-3 for the part number. Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-41. Place the top access assembly on a soft link-free cloth with the touchscreen facing down. Remove the six smaller screws (A) securing the position guide.
  • Page 287 7526 Remove the five larger screws (B) and the two smaller screws (C). 4-27 Repair information...
  • Page 288 7526 Lift the position guide, so you can access the cables. Flip open the lock (D) on the wide ribbon cable, and remove the cable from the connector. Disconnect the display cable (E) by pulling it straight out. Remove the screw (F) and disconnect the ground cable. 4-28 Service Manual...
  • Page 289 7526 Remove the position guide. Turn the position guide cover over. Remove the bezel. See “Operator panel bezel removal” on page 4-31. Rotate the operator panel up, and gently pull the display ribbon cable to the back the through the toroid (G).
  • Page 290 7526 Remove four screws (H). Note: Make sure to note the position of the ground cable (J) on the upper right. Remove the operator panel (touchscreen). 4-30 Service Manual...

  • Page 291: Operator Panel Bezel Removal

    7526 Operator panel bezel removal See Operator panel bezel on page 7-3 for the part number. Rotate the operator panel to its highest position. Using a flathead screwdriver or similar tool, unsnap the locking tabs on the upper left and the upper right of the bezel.

  • Page 292: Operator Panel Buttons Removal

    7526 Operator panel buttons removal Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-41. Place the top access assembly on a soft link-free cloth with the touchscreen facing down. Remove the six smaller screws (A) securing the position guide. 4-32 Service Manual...
  • Page 293 7526 Remove the five larger screws (B) and the two smaller screws (C). 4-33 Repair information...
  • Page 294 7526 Lift the position guide, so you can access the cables. Flip open the lock (D) on the wide ribbon cable, and remove the cable from the connector. Disconnect the display cable (E) by pulling it straight out. Remove the screw (F) and disconnect the ground cable. 4-34 Service Manual...
  • Page 295 7526 Remove the three screws (G) from the operator panel card. Move the UICC card out of the way to access the buttons. Remove the button or buttons that you need to replace. 4-35 Repair information...

  • Page 296: Output Bin Extension Cover Removal

    7526 Output bin extension cover removal “Output bin extension cover” on page 7-3 for the part number. Lift to remove the output bin extension cover. 4-36 Service Manual...

  • Page 297: Rear Cover Removal

    7526 Rear cover removal Remove the four screws (A). Lift up to disengage the two tabs (B). Note: If you are removing the rear cover to access another part, leave the cooling fan filter in place, and you are done. If you need to replace the rear cover continue with the next step to remove the separate cooling fan filter. Remove the cooling fan filter.

  • Page 298: Rear Frame Cover Removal

    7526 Rear frame cover removal “Rear frame cover” on page 7-3 for the part number. Loosen the eight screws (A). Lift the rear frame cover, and remove. 4-38 Service Manual...

  • Page 299: Right Cover Removal

    7526 Right cover removal “Right cover” on page 7-3 for the part number. Remove the rear cover. See “Rear cover removal” on page 4-37. Open the top access cover. Open the front access cover. Remove the plastic screw on the front (A). Remove the two black screws on the front (B).
  • Page 300 7526 Remove the three screws (C). Pull up on the rear of the right cover, and then press down at the indicated location to disengage the tab. 4-40 Service Manual...

  • Page 301: Top Access Cover Assembly Removal

    7526 Top access cover assembly removal “Top access cover assembly” on page 7-3 for the part number. Remove the right cover. See “Right cover removal” on page 4-39. Remove the rear frame cover. See “Rear frame cover removal” on page 4-38.
  • Page 302 7526 Open the three clips on the toroid to remove it from the USB cable. Note: Be sure to re-install the toroid when the top access cover is replaced. Remove the cables through the openings (E) in the system board frame. 4-42 Service Manual...
  • Page 303 7526 Remove the UICC cable from the two cable clamps (F), and the USB cable from the two clamps (G) above the system board. Open the two clips on the toroid (H) on the UICC. Note: Be sure to retain the toroid, and reinstall it on the cable when you install the top access cover. Remove the cables through the frame, over the cartridge fan, through the cable clamps (J), and through the frame towards the front of the MFP.
  • Page 304 7526 Remove one screw (K) on the left side and two screws (L) on the right side, that secure the links. Rotate the left and right pivots (M) until they are upright, and then remove them. Note: If you are removing the top access cover to access another part, leave the top access cover and the operator panel bezel attached, and you are done.

  • Page 305: Top Cover Assembly Removal

    7526 Top cover assembly removal Remove the top access cover. See “Top access cover assembly removal” on page 4-41. Remove the flatbed scanner. See “Flatbed scanner removal” on page 4-240. Remove the LVPS. Note: Make sure you note the routing of the cable for reinstallation. The cable should pass through the cable restraint (A) 4-45 Repair information...
  • Page 306 7526 Disconnect the cables in connectors JBIN1 (A), JFDS1 (B), JFAN1 (C), and JFUSER1 (D), on the system board. Remove the output bin sensor cable (A) and the feed through sensor cable (B) through the side of the frame (E). Remove the six screws (F).
  • Page 307 7526 Remove the screw (G) in front. Remove the ground screw (H) on the right side, and remove the ground cable from the cable restraint (J). Note: If you are removing the top cover to access another part, leave the cooling fan in the top cover, and you are done.

  • Page 308: Interlock Switch Cable Removal

    7526 5 V interlock switch cable removal “5 V interlock switch” on page 7-7 for the part number. Remove the EP drive assembly. See “Electrophotographic (EP) drive assembly removal” on page 4-70. Disconnect the cable in connector at JINT1 (A) on the system board. Open the front access door cover, and remove the screw (B).
  • Page 309 7526 Remove the cable from the two cable retainers (C). Remove the 5 V interlock switch and bracket from the printer. Remove the screw (D), and remove the 5 V interlock switch cable from the bracket. 4-49 Repair information...

  • Page 310: Interlock Switch Removal

    7526 24 V interlock switch removal See for the part number. Remove the LVPS. See “24 V interlock switch” on page 7-7. Disconnect the connector at JCVR1 (A) at system board. Remove the screw (B), and the bracket separates from the 24 V interlock switch. 4-50 Service Manual...
  • Page 311 7526 Installation notes: Observe the routing of the 24 V interlock switch cable (A). 4-51 Repair information...

  • Page 312: Bin Full Sensor Assembly Removal

    7526 Bin full sensor assembly removal Remove the top cover assembly. See “Top cover assembly removal” on page 4-45. Remove the cable from the openings, including the loop through the frame (A). Press up on the tab (B) to remove the flag. Installation notes: With the top cover assembly upside down, install the flag with the triangular shape (A) pointing down.

  • Page 313: Cartridge Cooling Fan Removal

    7526 Cartridge cooling fan removal Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Disconnect JBLW1 (A). Open the three clips holding the toroid on the cable, and remove the toroid. Note: Retain the toroid to reinstall later. Remove the right cover.
  • Page 314 7526 Remove the two screws (C). Remove the cartridge cooling fan. 4-54 Service Manual...

  • Page 315: Cartridge Motor 1/Fuser Cable Removal

    7526 Cartridge motor 1/fuser cable removal Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-104. Disconnect the connectors in JCARTP1 (A) and JCARTS1 (B) on the system board. Disconnect the connectors from the cartridge motor 1 (C) and the fuser motor (D). 4-55 Repair information...
  • Page 316 7526 Disconnect the camshaft cable connector (E) from the motor card and unwind the two cables. Remove the cable from the six retainers (F). Installation notes: • Make sure you wrap the camshaft cable around the cartridge motor 1/fuser cable, as shown, to prevent the cables from interfering with the motors or the motors damaging the cables.

  • Page 317: Cartridge Motor 2/3 Cable Removal

    7526 Cartridge motor 2/3 cable removal Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-104. Disconnect the connectors in JCARTP2 (A) and JCARTS2 (B) on the system board. Disconnect the connectors from the cartridge motor 2 (C) and cartridge motor 3 (D). 4-57 Repair information...
  • Page 318 7526 Remove the cable from the seven retainers (E). Installation notes: Note the routing of the cables and the cable retainers. 4-58 Service Manual...

  • Page 319: Color On Demand Assembly Removal

    7526 Color on demand assembly removal Remove the print cartridges. Remove the top cover assembly. See “Top cover assembly removal” on page 4-45. Disconnect the connector at JBOR1 (A) on the system board. Remove the five screws (B). Remove the COD assembly. 4-59 Repair information...
  • Page 320 7526 Installation notes: Push the actuators (A) all the way down. Turn the printer around, and verify the actuators are in the correct location by looking inside the front of the printer. The actuators (B) should be visible in the triangular holes in the frame, as shown. 4-60 Service Manual...
  • Page 321 7526 Rotate the large COD gear until the stop (C) on the gear is against the housing. Engage the gears on the left side of the COD. 4-61 Repair information...
  • Page 322 7526 Engage the gears (D) on the right side of the COD. Replace the five screws (E). Verify the actuators can be seen by looking inside the printer at the triangular holes, as in step 2. Check to make sure you can rotate the large COD gear from stop to stop. Reconnect the cable connector to JBOR1 connector on the system board.

  • Page 323: Contact Springs Removal

    7526 Contact springs removal See for the part number. Remove all the toner cartridges. Remove the screw (A) and the spring cap (B) of the appropriate contact spring. Press the lower half (C, D) of the springs and remove the springs. 4-63 Repair information...
  • Page 324 7526 Installation notes: When installing, make sure the top half (E) of the spring is under the straight spring (F). This is typical for both types of springs. Also make sure the bottom half (D,G) of both springs are compressed and locked by the appropriate locking tabs (H, I).

  • Page 325: Cooling Fan Removal

    7526 Cooling fan removal Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Remove the rear cover. See “Rear cover removal” on page 4-37. Disconnect the cable at the connector JFAN1 (A) on the system board. Remove the two screws (B).

  • Page 326: Cooling Fan Filter Removal

    7526 Cooling fan filter removal Remove the rear cover. See “Rear cover removal” on page 4-37. Turn the cover over. Squeeze the right side of the filter, and remove it from the tabs (A). 4-66 Service Manual...

  • Page 327: Duplex Reference Edge Guide Assembly Removal

    7526 Duplex reference edge guide assembly removal Remove the paper tray. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access door cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 328 7526 Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side. Close the front access door assembly.
  • Page 329 7526 Remove the two screws (G). Remove the duplex reference edge guide assembly. 4-69 Repair information...

  • Page 330: Electrophotographic (Ep) Drive Assembly Removal

    7526 Electrophotographic (EP) drive assembly removal See for the part number. Remove the paper tray. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access door cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 331 7526 Disconnect the cartridge 1/fuser motor cable (two connectors) (D), and remove the cables from the cable retainers (E). Disconnect the camshaft/transport cable connector (F), and remove the cable from the cable clamp (G). 4-71 Repair information...
  • Page 332 7526 Unwind the camshaft/transport cable and the cartridge 1/fuser cables (H). Note: Be sure to rewind the camshaft/transport cable around the other cables with about four twists to keep them from interfering with or being damaged by the motors. Disconnect the cartridge 2/cartridge 3 motor cable (two connectors) (J), and remove the cable from the cable clamps (K).
  • Page 333 7526 Disconnect the motor drive cable connector (L), and remove the cable from the cable clamps (M) .Remove the three screws (N) on the front. Remove the two screws (O) on the inside. 4-73 Repair information...
  • Page 334 7526 Remove the seven screws (P). securing the EP drive. 4-74 Service Manual...
  • Page 335 7526 Remove the 5 V interlock switch cable from the restraint (R) on the backside of the EP drive. Remove the EP drive. Installation notes: The EP drive assembly for the single-function printers and the multiple-function printers (MFP) are the same, except for the fuser retract link.
  • Page 336 7526 Install the new fuser retract link (C), the follower cam (D), and the E-clip (E). Note: Be sure to orient the follower cam so that the smaller diameter side is against the fuser retract link, and the larger diameter is next to the E-clip. 4-76 Service Manual...
  • Page 337 7526 To install the EP drive: Push the actuator rack all the way to the right (A). Pull the link all the way up (B). Note: After installing the EP drive assembly, be sure to test the link by moving it up and down. It should move freely and not rub against any motor cables.
  • Page 338 7526 Fasten the 5 V interlock cable into the cable retainer (C) on the bottom of the EP drive. Align the gear so the first gear tooth (D) of the top cover camshaft meshes with the first two gear teeth (E) after the flat area in the EP drive actuator rack, and then seat the right side of the top cover camshaft into the boss (F) on the EP drive.
  • Page 339 7526 Hold the drive in place while replacing the first of the seven screws, then continue replacing the rest of the screws (G). 4-79 Repair information...
  • Page 340 7526 Replace the two screws (H) from the inside. Replace the three screws (J) on front. Wind the camshaft cable (K) around the cartridge 1/fuser cables about four times to make sure they do not interfere with or are damaged by the fuser motor. Connect the cartridge 1/fuser motor cable (two connectors) (L), and place the cables in the cable retainers (M).
  • Page 341 7526 Connect the cartridge 2/cartridge 3 motor cable (two connectors) (N), and make sure the cable is in the cable clamps (O). Connect the camshaft/transport cable connector (P), and make sure the cable is in the cable clamps (R). 4-81 Repair information...

  • Page 342: Fax Modem Removal

    7526 Connect the motor drive cable connector (S), and make sure the cable is in the cable clamps (T). Reinstall the low-voltage power supply (LVPS). Replace the right and rear covers. Replace the transport belt module and developer units. Replace the cartridges and the fuser. Replace the paper tray.

  • Page 343: Front Door Assembly Removal

    7526 Front door assembly removal See the part number for the Front door assembly for the specific model you need on. Remove the front access cover assembly. See “Front access cover assembly removal” on page 4-20. Remove the LVPS. See “Low-voltage power supply (LVPS) removal”...
  • Page 344 7526 Open the front door assembly. Unwrap and remove the cable from the left and right pulleys (C). Close the front door assembly, and remove the mounting screw (D) and the cap (F). 4-84 Service Manual...
  • Page 345 7526 Open the front door assembly, slide it to the right, and remove. You need to press firmly to slide the front door assembly to the right. Installation note: See “Front door assembly front cable (left) removal” on page 4-86 “Front door assembly front cable (right) removal”...

  • Page 346: Front Door Assembly Front Cable (Left) Removal

    7526 Front door assembly front cable (left) removal Remove the paper tray. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access door cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 347 7526 Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side. 4-87 Repair information...
  • Page 348 7526 Remove the left cover. See “Left cover removal” on page 4-23. Close the front access door assembly. Release the cable spring (G) from the front door assembly. Note: In order to access the springs, make sure the top access cover is closed. Remove the end of the cable (J) from the frame.
  • Page 349 7526 Open the front door assembly, and using a flathead screwdriver, rotate the top cover camshaft clockwise to raise the front door locking mechanism (J). Installation note: Note: The longer cable installs on the left side of the printer. 4-89 Repair information...

  • Page 350: Front Door Assembly Front Cable (Right) Removal

    7526 Front door assembly front cable (right) removal Remove the paper tray. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access door cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 351 7526 Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side. 4-91 Repair information...
  • Page 352 7526 Close the front access door assembly. Release the spring (G) from the front door assembly. Note: In order to access the springs, make sure the top access cover is closed. Remove the end of the cable (H) from the frame. Remove the right restraint cable.
  • Page 353 7526 Installation notes: The shorter restraint cable installs on the right side of the printer. 4-93 Repair information...

  • Page 354: Fuser Assembly Removal

    7526 Fuser assembly removal “Fuser assembly, 115 V”, “Fuser assembly, 230 V”, or “Fuser assembly, 100 V” on page 7-5 for the part number. CAUTION The fuser can be extremely hot. Use care when handling to avoid burns. Turn off the printer. Open the top access door.

  • Page 355: Fuser Ac Cable Removal

    7526 Fuser AC cable removal Note: The LVPS to fuser AC cable is black. Remove the top cover assembly. See “Top cover assembly removal” on page 4-45. Turn the top cover assembly over. Slide the connector down, and remove the connector from the keyed hole (A). 4-95 Repair information...
  • Page 356 7526 Remove the cable from the cable openings (B). Note: Observe the routing of the cable for reinstallation. Remove the cable from the cable restraint (C) on the right side, and remove the cable. 4-96 Service Manual...

  • Page 357: Fuser Dc Cable Removal

    7526 Fuser DC cable removal Note: The fuser to system board autoconnect cable is red. Remove the top cover assembly. See “Top cover assembly removal” on page 4-45. Turn the top cover assembly over. Remove the connector (A) from the top cover assembly. Warning: You will damage the old connector in the process.

  • Page 358: Hard Drive Assembly Removal

    7526 Hard drive assembly removal Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Press the locking tab (A) as you disconnect the hard disk cable from the system board (B). Open the left cover door, and remove the two screws (C). 4-98 Service Manual...
  • Page 359 7526 Pull the hard disk straight out to pop the hard disk standoffs free of the system board. 4-99 Repair information...

  • Page 360: High-Voltage Power Supply (Hvps) Removal

    7526 High-voltage power supply (HVPS) removal “High-voltage power supply” on page 7-11 for the part number. Remove the left cover. See “Left cover removal” on page 4-23. Remove the six mounting screws (A). Release the locking tab (B) from the front, lower corner of the HVPS. 4-100 Service Manual...
  • Page 361 7526 Disconnect the five connectors (C) from the HVPS. Installation notes: Be sure to replace the spring when replacing the HVPS. See the illustration for proper orientation. 4-101 Repair information...

  • Page 362: High-Voltage Power Supply (Hvps) Cable Removal

    7526 High-voltage power supply (HVPS) cable removal Remove the top cover assembly. See “Top cover assembly removal” on page 4-45. Disconnect the cable connector at JHVPS1 (A) on the system board, and extract the cable through the opening (B) in the frame. Disconnect the cable connector (C) from the back of the HVPS.

  • Page 363: Left Bellcrank Assembly Removal

    7526 Left bellcrank assembly removal See for the part number. Remove the left cover. See “Left cover removal” on page 4-23. Remove the C-clip (A). Remove the left bellcrank assembly. 4-103 Repair information...

  • Page 364: Low-Voltage Power Supply (Lvps) Removal

    7526 Low-voltage power supply (LVPS) removal “Low-voltage power supply” on page 7-7 for the part number. Remove the right cover. See “Right cover removal” on page 4-39. Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Disconnect the connector at JLVPS1 connector (A) and at JLVPS2 (B) on the system board.
  • Page 365 7526 Press the latch and pull back to disconnect the power AC cable from the LVPS (F). Installation note: • When installing the new LVPS, make sure the voltage switch (A) is set for the proper value (115 V or 230 V), depending on the country.

  • Page 366: Motor Driver Cable Removal

    7526 Motor driver cable removal Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-104. Disconnect the connector in JDVR1 (A) on the system board. Disconnect the connector on the motor driver card (B). Remove the cable from the cable from the four cable retainers (C). Installation notes Note the routing of the cable and the cable retainers.

  • Page 367: Motor Driver Card Removal

    7526 Motor driver card removal Remove the right cover. See “Right cover removal” on page 4-39. Disconnect the three cables (A). Remove the two screws (B), and remove the motor driver card. 4-107 Repair information...

  • Page 368: Multipurpose Feeder (Mpf)/Duplex Gear And Housing Removal

    7526 Multipurpose feeder (MPF)/duplex gear and housing removal See the multipurpose feeder/duplex gear and housing kit on for the part number. Remove the paper pick mechanism assembly. See “Paper pick mechanism assembly removal” on page 4-117. Remove the two E-clips (A) from the gears. Remove the three screws (B).
  • Page 369 7526 Slide a flathead screwdriver up and under the front cover. Slide the remaining two gears and housings off. 4-109 Repair information...

  • Page 370: Multipurpose Feeder (Mpf)/Duplex Motor Assembly Removal

    7526 Multipurpose feeder (MPF)/duplex motor assembly removal “MP feeder/duplex motor” on page 7-7 for the part number. Remove the low-voltage power supply (LVPS). See “Low-voltage power supply (LVPS) removal” on page 4-104. Remove the multipurpose feeder/duplex gear and housing. See “Multipurpose feeder (MPF)/duplex gear and housing removal”...
  • Page 371 7526 Slide the motor out of the housing. Disconnect the connector (D) from the motor. Installation notes: Connect the cable (A) at the motor. Slide the cable tie (B) onto the motor. 4-111 Repair information...
  • Page 372 7526 Insert the motor into the frame. Replace the screws (C). 4-112 Service Manual...
  • Page 373 7526 Slide the housing onto the motor, making sure the four tabs of the housing slide under the cable tie. 4-113 Repair information...

  • Page 374: Multipurpose Feeder (Mpf)/Duplex Motor Cable Removal

    7526 Multipurpose feeder (MPF)/duplex motor cable removal Remove the multipurpose feeder/duplex motor. See “Multipurpose feeder (MPF)/duplex motor cable removal” on page 4-114. Disconnect the connector from JDX1 (A) on the system board. Remove the cable from the cable retainers (B). 4-114 Service Manual...

  • Page 375: Option Cable Removal

    7526 Option cable removal Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-104. Disconnect the cable connector at JOPT2 (A) on the system board. Replace the rear frame cover to protect the system board. Position the printer on its back Remove the two screws (B).
  • Page 376 7526 Press the tabs together to remove the option cable connector. Note: Be sure to note the cable routing for reinstallation. 4-116 Service Manual...

  • Page 377: Paper Pick Mechanism Assembly Removal

    7526 Paper pick mechanism assembly removal See for the part number. Remove the paper tray. Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Disconnect the connector in JFDPCK1 (A) and JTRAY1 (B) on the system board. Open the latch (C) to remove the toroids from the cables.
  • Page 378 7526 Open the front access cover. Disconnect the transfer module cable (D). Press the two tabs (E) to release the front access cover assembly. Press the two tabs (F) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 379 7526 Remove the four screws (G) from the bottom pan. With one hand, disengage the gear (H), then grasp the paper pick assembly, and pull forward and downward to disengage the assembly until the front (J) and rear locking tabs release (not visible). 4-119 Repair information...
  • Page 380 7526 Lower the paper pick mechanism, and remove through the front of the printer. Note: Make sure the JTRAY1 and JTRAY2 connectors do not bind when passing through the frame access hole. Installation notes: Remove the waste toner assembly. See “Waste toner assembly removal”...
  • Page 381 7526 Tape the ADF (scanner) cover to the flatbed scanner. Turn the printer on its back. Slide the paper pick assembly toward the back of the printer, and down to engage the tabs (A). Slide the tabs (A), and engage the gear (B). Reach into the printer, and replace the front right screw (C) to secure the paper pick assembly.
  • Page 382 7526 Secure the remaining three screws (D). Remove the rear frame cover. Route the cables through the hole in the frame, and connect them to JFDPCK1 (E) and JTRAY1 (F). 4-122 Service Manual...
  • Page 383 7526 Reattach the toroids (G) to the cables. Replace the rear frame cover. Replace the waste toner assembly. Replace the toner cartridges. Replace the transfer module with the photoconductor units. Close the front access cover. Replace the paper tray. Open the ADF (scanner) cover and slide the scanner lock to the open postion. 4-123 Repair information...

  • Page 384: Photoconductor Unit Removal

    7526 Photoconductor unit removal Not a FRU Warning: To avoid damaging the photoconductor drum, hold the photoconductor units by their handle and place the photoconductor units on a clean surface. See “Handing the photoconductor unit” on page 4-2 for additional information. Open the front access door.

  • Page 385: Pick Tires Removal And Replacement

    7526 Pick tires removal and replacement See for the part number. The autocompensator pick roll tires are located in the base printer. There are also tires in all input options. If you have additional input options, and you are having problems with media picking, replace these tires also. Always replace the pick tires in pairs.

  • Page 386: Printer Pad Removal

    7526 Installation notes: Install the new rubber tires with the surface texture turning in the direction as shown. Note: Feel the rubber surface to verify it turns properly in the direction shown. Printer pad removal Slide the corner of the printer containing the damaged pad over the corner of the table. Remove the side cover that corresponds to the damaged pad so you can see if the pad fully seats in the installation holes.
  • Page 387 7526 Pull the pad (A) from the bottom of the printer. There are two rubber connectors. Installation note: Verify that the pad fully seats in the installation holes. 4-127 Repair information...

  • Page 388: Printhead Removal, Installation, And Adjustment

    7526 Printhead removal, installation, and adjustment “Printhead assembly” on page 7-9 for the part number. Service tip—Testing the new printhead “Printhead verification” on page 3-52 for quick way to verify that the NVRAM on a printhead is good before you install the printhead. Printhead removal Turn the printer off.
  • Page 389 7526 period of time. You can place a clean, dry cloth over the transfer module and photoconductor units until they are required. Remove all of the toner cartridges. Remove the four screws (D). Lift the rear cover and remove it. 4-129 Repair information...
  • Page 390 7526 Remove the rear frame cover. Loosen the eight screws (E). Lift the rear frame cover, and remove. Remove the right cover. See “Right cover removal” on page 4-39. Remove the left cover with the left door cover attached. See “Left cover removal”...
  • Page 391 7526 Warning: Secure the printhead when loosening the printhead alignment screw. Failure to do this allows the printhead to fall out of the printer, potentially damaging the printhead. 4-131 Repair information...
  • Page 392 7526 Install the printhead and replace parts Warning: • When reinstalling the printhead, it is important to keep in mind that the printhead mounting screws should be initially tightened just enough to hold the printhead in the printer. The printer parts are installed with the printhead mounting screws loose so you can print the pages that will be used to align the black plane to the printer frame.
  • Page 393 7526 Lightly tighten the alignment screw (C). Feed the ground cable through the hole in bottom left side of the frame. 4-133 Repair information...
  • Page 394 7526 Replace the system board support shield. Loosely attache the two mounting screws (D2). Set the system board shield in place. Note: Check that the ribbon cables do not rub against the edges of the frame. Replace the remaining system board shield screws (D) in the following order: •...
  • Page 395 7526 Replace the system board. Place the system board in position. Note: Check that the mirror motor cable, printhead, and UICC cables do not rub against the edges of the frame. Replace the nine screws (E) in the system board in the following order: •...
  • Page 396 7526 Replace the ground strap (F) on the screw (G), and tighten the screw. Replace the two screws (H) for the hard disk shield. 4-136 Service Manual...
  • Page 397 7526 Reconnect all the connectors to the system board. Use the diagram below for a guideline. Warning: Be careful reconnecting the printhead ribbon cable (J) and the UICC cable (K). Ribbon cables can be damaged easily and should be handled carefully. Replace the fax modem card and/or the hard disk, if appropriate.
  • Page 398 7526 Printhead alignment Note: The printhead mounting screws should be initially tightened just enough to hold the printhead in the printer. There is one printhead that houses the four color planes. The black plane is aligned to the printer, and the color planes are internally aligned to black.
  • Page 399 7526 Touch Quick Test. A page similar to this one prints: 4-139 Repair information...
  • Page 400 7526 Adjust the printhead alignment screw (A) to adjust the skew and straighten the image on the printout. If the top right alignment marks are lower than the top left alignment marks, rotate the alignment screw counterclockwise a full revolution, and print the Quick Test page. Repeat adjusting the screw and printing the Quick Test page until the top alignment marks are the same distance from the top of the media.
  • Page 401 7526 Tighten the printhead mounting screws. Turn off the printer. Disconnect the power cord from the electrical outlet. Disconnect the transfer module cable. Press the two tabs on either side of the transfer module, and lift out the transfer module with the photoconductor units in place.
  • Page 402 7526 Registration (black) Top Margin Reconnect the power cord to the electrical outlet, but do not turn on the printer yet. Enter Diagnostic mode (press and hold 3 and 6, turn on the printer, and release the buttons when the progress bar appears).
  • Page 403 7526 Bottom Margin Adjust the bottom margin until the points of the bottom margin alignment marks are visible and touching the edge of the paper. • The right arrow increases the value and moves the bottom alignment marks up the page. •...
  • Page 404 7526 Alignment (cyan, yellow, and magenta) Touch Back until you reach the top menu, and touch Alignment Menu. Select Cyan. Cyan Top Margin Left Margin Right Margin Skew Quick Test Touch the left or right arrows to set Top Margin to zero. Do the same for Left Margin, Right Margin, Bottom Margin, Skew, and Bow.
  • Page 405 7526 Determine the line under Fine Adjustment that is closest. If the value is beyond the Fine Adjustment scale, use either of the Coarse Adjustment scales. Enter the number determined from the Fine Adjustment scale or the Coarse Adjustment scales on the part of the page for the “T”...
  • Page 406 7526 Repeat this process for skew (Z). Don't forget to subtract the T value and add the current cyan Z value to obtain the new skew (Z) value. An example is shown below: Continue to follow the directions on the bottom of the first page to find the Cyan Top Margin (T), the Skew (Z), and on the second page of the Quick Test page, the Left Margin (L), Right Margin (R), and Bow (P).

  • Page 407: Right Bellcrank Assembly Removal

    7526 Right bellcrank assembly removal See for the part number. Remove the right cover. See “Right cover removal” on page 4-39. Remove the C-clip (A). Remove the right bellcrank assembly. 4-147 Repair information...

  • Page 408: System Board Removal

    7526 System board removal See the system board part number for the model you need on page 7-9. CAUTION This product contains a lithium battery. THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE. Discard used batteries according to the battery manufacturer’s instructions and local regulations.
  • Page 409 7526 Remove any toroids by uncliping the fasteners. Note: Be sure to note where you have removed the toroids, and replace them during installation. Disconnect all the cables from the system board. Warning: Do not use tools to remove the UICC cable (B) or the printhead ribbon cable (C). Flat ribbon cables can be damaged and should be removed gently by hand.
  • Page 410 7526 Remove the nine screws (D) from the system board. Remove the system board. 4-150 Service Manual...
  • Page 411 7526 Installation notes: Place the system board in position. Note: Check that the mirror motor cable and the printhead cable do not rub against the edges of the frame. Replace the nine screws (A) in the system board in the following order: •...
  • Page 412 7526 Replace all the screws (B) from the left side of the printer, including: • Ethernet port connector (1 screws) • Modem shield (1 screws) • Hard disk shield (2 screws) • Ground screw (1 screw) Note: Be sure to attach the ground wire (C) to the ground screw. 4-152 Service Manual...
  • Page 413 7526 c. Reconnect all the connectors to the system board. Use the diagram below for a guideline. Warning: Be careful reconnecting the printhead ribbon cable (D) and the MDC cable (E). Ribbon cables can be damaged easily and should be handled carefully. Install the toroids, hard disk, modem, and wireless network card, if appropriate.

  • Page 414: System Board Support Shield Removal

    7526 System board support shield removal “System board support shield” on page 7-9 for the part number. Remove the system board. See “System board removal” on page 4-148. Remove the right cover. See “Right cover removal” on page 4-39. Pull the cables through the access holes on the right side of the printer. Remove the five mounting screws (A) from the outer left side of the printer.
  • Page 415 7526 Remove the five mounting screws (D) from the top and bottom of the support shield. Note: Only the ribbon and mirror motor cables come through the access holes in the system board support shield. Lower and remove the support shield. Note: Be careful not to damage the ribbon cables that route through the top and bottom frame of the printer.
  • Page 416 7526 Installation notes: Loosely attach the two mounting screws (A). Set the system board shield in place. Note: Check that the ribbon cables do not rub against the edges of the frame. Replace the remaining system board shield screws in the following order: •...

  • Page 417: Toner Level Sensor Removal

    7526 Toner level sensor removal “Toner level sensor” on page 7-11 for the part number. Note the locations of the toner sensors. 4-157 Repair information...
  • Page 418 7526 Remove the HVPS. See “High-voltage power supply (HVPS) cable removal” on page 4-102. For the upper two sensors: These sensors are more difficult to reach because the toner is difficult to reach: It is difficult to press both locking tabs at the same time. Using a spring hook, press the locking tab (A), and disengage the sensor on that side.

  • Page 419: Top Access Cover Links Removal

    7526 Top access cover links removal Links come two in a package and fit either the right or the left. Lower links Open the top access cover. Remove the side cover that corresponds to the link you need to replace. For example, if you are replacing the right lower link, remove the right cover.

  • Page 420: Top Access Cover Sensor Removal

    7526 Top access cover sensor removal This cable is gray. Remove the rear frame cover. See “Rear frame cover removal” on page 4-38 Disconnect the cable in connector JFDS1, and remove the cable through the top left frame. Remove the right cover. See “Right cover removal”...
  • Page 421 7526 Installation notes: Turn over the top access cover. Snap the sensor into place. Note: Make sure the sensor is replaced with the slot (A) in the center aligned with the gap in the top cover frame. Also note the placement of the cable connector. Route the cable through the opening (B), and through the openings in the other side of the top cover assembly.

  • Page 422: Top Cover Camshaft Assembly Removal

    7526 Top cover camshaft assembly removal See for the part number. Remove the top access cover. See “Top access cover assembly removal” on page 4-41. Remove the fuser. See “Fuser assembly removal” on page 4-94. Remove the top screw (A), and loosen the other screw (B). This will allow you to flex the EP drive. 4-162 Service Manual...
  • Page 423 7526 Remove the two screws (C). Rotate the camshaft up using the camshaft actuator handle (D) so you can access the other two screws (E), and remove them. 4-163 Repair information...
  • Page 424 7526 Flex the EP drive assembly to remove the right side of the camshaft from the boss (F) and lift to remove the camshaft. 4-164 Service Manual...
  • Page 425 7526 Installation notes: On the left side, align the mark on the idler gear (A) with the mark on the camshaft gear (B), and slide the camshaft into place, meshing the gears on the left side. 4-165 Repair information...
  • Page 426 7526 Rotate the camshaft up using the camshaft actuator handle (C), and make sure the gears on the right side mesh so the first gear tooth of the camshaft aligns with the first two gear teeth of the EP drive actuator rack (D).
  • Page 427 7526 Rotate the camshaft using the camshaft actuator handle, and replace the two screws (H). Replace the screw in the EP drive that allowed you to flex the EP drive, and tighten the other screw (see step 4 of the removal). Replace the top access cover assembly Replace the fuser, the cartridges, and close the covers.

  • Page 428: Transfer Module Removal

    7526 Transfer module removal “Transfer module” on page 7-5 for the part number. Open the top access cover. Open the front access door. Disconnect the transfer module cable (A). Press the two tabs (B) to release the front access cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
  • Page 429 7526 Remove the photoconductor units. Lift the right end handle (D) of the photoconductor unit, releasing from the mount. Lift the unit up and away from the left side of printer, ensuring the left end of the photoconductor is released from the holding pin (E).

  • Page 430: Transport Cable Removal

    7526 Transport cable removal Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-104. Disconnect the transfer module cable (transport cable) (A). Press the two tabs (B) to release the front access cover assembly. Press the two tabs (C) on either side of the transfer module, and lift out the transfer module. Note: Leave the photoconductor units on the transport belt when removing.
  • Page 431 7526 Disconnect the transport cable from the system board at JTPS1 connector (D). Note: The cable connector on the system board end of the cable is smaller than the connector on the front access door, and it may be easier to get that end through the openings. Extract the cable through the opening in the frame to the right side of the printer (E).
  • Page 432 7526 Remove the six screws (H) from the cable shield. Remove the cable through the cable channel (J). 4-172 Service Manual...

  • Page 433: Transport Motor Cable Removal

    7526 Transport motor cable removal Remove the right cover. See “Right cover removal” on page 4-39. Disconnect the cable from the transport motor drive (A). Disconnect the cable from the transport motor (B). Remove the cable. 4-173 Repair information...

  • Page 434: Uicc Card Removal

    7526 UICC card removal Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-41. Place the top access assembly on a soft link-free cloth with the touchscreen facing down. Remove the six smaller screws (A) securing the position guide. 4-174 Service Manual...
  • Page 435 7526 Remove the five larger screws (B) and the two smaller screws (C). 4-175 Repair information...
  • Page 436 7526 Lift the position guide, so you can access the cables. Flip open the lock (D) on the wide ribbon cable, and remove the cable from the connector. Carefully pull the display cable (E) straight out to disconnect it. Remove the screw (F) and disconnect the ground cable. 4-176 Service Manual...
  • Page 437 7526 Remove the position guide. Disconnect the UICC cable (F). Remove the three screws (G) from the operator panel card. Remove the UICC card. 4-177 Repair information...

  • Page 438: Uicc Cable Removal

    7526 UICC cable removal Remove the top access cover assembly. See “Top access cover assembly removal” on page 4-41. Place the top access assembly on a soft link-free cloth with the touchscreen facing down. Remove the six smaller screws (A) securing the position guide. 4-178 Service Manual...
  • Page 439 7526 Remove the five larger screws (B) and the two smaller screws (C). Lift the position guide, so you can access the cables. 4-179 Repair information...
  • Page 440 7526 Flip open the lock (D) on the wide ribbon cable, and remove the cable from the connector. Disconnect the display cable (E) by pulling it straight out. Remove the screw (F) and disconnect the ground cable. Remove the position guide. 4-180 Service Manual...
  • Page 441 7526 Disconnect the UICC cable (G), and remove the cable from the cable retainers (H). Remove the UICC card. 4-181 Repair information...

  • Page 442: Usb Connector Cable Removal (Front Panel)

    7526 USB connector cable removal (front panel) Remove the top access cover. See “Top access cover assembly removal” on page 4-41. Place the top access assembly on a soft link-free cloth with the touchscreen facing down. Remove the six smaller screws (A) securing the position guide. 4-182 Service Manual...
  • Page 443 7526 Remove the five larger screws (B) and the two smaller screws (C). Lift the position guide, so you can access the cables. 4-183 Repair information...
  • Page 444 7526 Flip open the lock (D) on the wide ribbon cable, and remove the cable from the connector. Disconnect the display cable (E) by pulling it straight out. Remove the screw (F) and disconnect the ground cable. Remove the position guide. 4-184 Service Manual...
  • Page 445 7526 Disconnect the USB ground cable (G). Note: Take note of the routing of the ground cable. Remove the two screws (H) that secure the USB connector. Remove the USB connector cable, the ground cable, and the connector. 4-185 Repair information...

  • Page 446: Waste Toner Assembly Removal

    7526 Waste toner assembly removal Not a FRU. Press the waste toner release latch (A). Swing the front of the waste toner assembly away from the printer and remove. 4-186 Service Manual...

  • Page 447: Wireless Network Antenna Removal

    7526 Wireless network antenna removal Remove the wireless network card. see “Wireless network card removal” on page 4-188. Disconnect the wireless network antenna cable (A) from the wireless network card. With pliers, squeeze the inner tabs (B), and pull the antenna out. Pull the cable through, and remove the antenna with the cable.

  • Page 448: Wireless Network Card Removal

    7526 Wireless network card removal Remove the rear frame cover. See “Rear frame cover removal” on page 4-38. Squeeze the connector (A) to disconnect the wireless cable from the system board at J5. Open the left door cover. Remove the two screws (B) that secure the card into place. 4-188 Service Manual...
  • Page 449 7526 Pop the posts (C) on the card from the sockets (holes) in the system board. Note: If you are removing the wireless network card to access another part, leave the antenna attached to the card, and you are done. If you need to replace the wireless network card FRU, continue with the next step to remove the separate wireless network antenna FRU.

  • Page 450: Scanner Flatbed And Automatic Document Feeder (Adf)

    7526 Scanner flatbed and automatic document feeder (ADF) ADF front cover removal Open the ADF front cover. Remove the two screws (A). Close the ADF front cover. Separate the cover from the ADF case assembly by pressing on the release and cover. 4-190 Service Manual...
  • Page 451 7526 Lift the cover from the ADF. 4-191 Repair information...

  • Page 452: Adf Front Side Cover Removal

    7526 ADF front side cover removal Remove the input tray. See “Input tray removal” on page 4-204. Open the ADF front cover. Remove the screw (A). Lift the cover to remove. 4-192 Service Manual...

  • Page 453: Adf Handle Cover Removal

    7526 Installation notes: Insert the tab into the slot, and lower it into place. ADF handle cover removal Open the ADF. Remove the two screws (A) in the handle cover. Remove the handle cover. 4-193 Repair information...

  • Page 454: Adf Motor Side Cover Removal

    7526 ADF motor side cover removal Remove the input tray. See “Input tray removal” on page 4-204. Remove the ADF front cover. See “ADF front cover removal” on page 4-190. Open the ADF case assembly. Remove the two screws (A). 4-194 Service Manual...
  • Page 455 7526 Lift the ADF motor side cover, and disconnect the tray connector (B). Note: If you are removing the ADF motor side cover to access another part, leave the cable attached, and you are done. If you need to replace the ADF motor side cover FRU, continue with the next step to remove the separate left door cover FRU.
  • Page 456 7526 Remove the screw (D) to remove the cable from the ADF motor side cover. Installation notes: • Install the cable from the old FRU in the new FRU. • Be sure to route the cable through the hole. The smaller connector goes through the hole. •...

  • Page 457: Adf Upper Case Cover Removal

    7526 ADF upper case cover removal Open the ADF cover. Remove the two screws (A). 4-197 Repair information...
  • Page 458 7526 Lift the ADF upper case cover up to access the ground screw, and remove the ground screw (B). Note: If you are removing the ADF upper case cover to access another part, leave the cable attached, and you are done. If you need to replace the ADF upper case cover, continue with the next step to remove the separate cable.

  • Page 459: Flatbed Cave Led Card And Cover Removal

    7526 Flatbed cave LED card and cover removal The flatbed cave LED card and the flatbed cave LED cover are separate FRUs. The removal for each is the same. Remove the screw (A). Pull the assembly down. Disconnect the cable (B). 4-199 Repair information...
  • Page 460 7526 Pinch each of the two clear posts (C), separate the flatbed cave LED cover from the flatbed cave LED card. Separate the FRU you need to replace. 4-200 Service Manual...

  • Page 461: Flatbed With Glass Cover Removal

    7526 Flatbed with glass cover removal Remove the ADF. See “ADF removal (entire)” on page 4-210. Disconnect the two cables (A). Remove the scanner left cover. See “Scanner left cover removal” on page 4-206. Remove the scanner right cover. See “Scanner right cover removal”...
  • Page 462 7526 Remove the four screws (C) from the right and left sides. Remove the two screws (D) from the top. 4-202 Service Manual...
  • Page 463 7526 Lift up and extract the two cables (E) through the frame. Remove the flatbed with glass cover. 4-203 Repair information...

  • Page 464: Input Tray Removal

    7526 Input tray removal Lift the input tray. Remove the screw (A) securing the cable cover. Disconnect the cable connector (B). Lift the left front side, and ease the rear right edge out. 4-204 Service Manual...

  • Page 465: Scanner Front Cover Removal

    7526 Disengage the cable from the channel, and remove the tray. Note: Observe the routing for re-installation. Scanner front cover removal Open the ADF. Grasp the front cover and the top right, and pull to remove the scanner front cover. 4-205 Repair information...

  • Page 466: Scanner Left Cover Removal

    7526 Scanner left cover removal Remove the scanner front cover. See “Scanner front cover removal” on page 4-205. Remove the left cover. See “Left cover removal” on page 4-23. Remove the three screws (A). Pull the bottom out, and slide it toward the front. Lift the left cover away.

  • Page 467: Scanner Rear Cover Removal

    7526 Scanner rear cover removal Remove the six screws (A). Remove the scanner rear cover. Note: Make sure the flatbed filter does not get lost. 4-207 Repair information...

  • Page 468: Scanner Right Cover Removal

    7526 Scanner right cover removal Remove the scanner front cover. See “Scanner front cover removal” on page 4-205. Remove the right cover. See “Right cover removal” on page 4-39. Remove the screw (A). Slide the cover toward the front of the multifunction printer. 4-208 Service Manual...
  • Page 469 7526 Grasp the cover on the lower right, and pull up. 4-209 Repair information...

  • Page 470: Adf Removal (Entire)

    7526 ADF removal (entire) Remove the left cover. See “Left cover removal” on page 4-23. Remove the ground screw (A) secured to the MDC card. Disconnect the cable (B). Remove the scanner rear cover. See “Scanner rear cover removal” on page 4-207 4-210 Service Manual...
  • Page 471 7526 Remove the screw (C) that secures the ground cable. Remove the cable from the cable restraint (D). LIft the ADF until it has resistance, press the release tabs (D), and complete removing the ADF. Note: It may be easier to release the tab closest to the left side first. 4-211 Repair information...
  • Page 472 7526 Installation note: Be sure to attach the ground cable to the screw (see step 6 above). Warning: Whenever you replace the ADF (entire), the flatbed scanner, or the MDC card, perform the “Scanner Manual Registration” in Configuration menu. To enter Config Menu: Turn off the multifunction printer.

  • Page 473: Adf Case Assembly Removal

    7526 ADF case assembly removal Remove the ADF front cover. See “ADF front cover removal” on page 4-190. Disconnect the sensor cable (A). Rotate the ADF case assembly until the flattened shaft ends come out of the opening. 4-213 Repair information...
  • Page 474 7526 Remove the sensor cable from the narrow retainer by untwisting the cable wires and easing them out individually. Remove the ADF case assembly. 4-214 Service Manual...

  • Page 475: Adf Closed Cover Flag Removal

    7526 ADF closed cover flag removal Remove the ADF front cover. See “ADF front cover removal” on page 4-190. Remove the screw (A). Lift the sensor (B) out of the way. Remove the closed cover flag (C). 4-215 Repair information...

  • Page 476: Adf Exit Sensor (With Cable) Removal

    7526 ADF exit sensor (with cable) removal Remove the ADF motor side cover. See “ADF motor side cover removal” on page 4-194. Disconnect the output sensor cable. Push the cable and connector through the opening (B) in the ADF frame. 4-216 Service Manual...
  • Page 477 7526 Remove the ADF pressure plate cover. See “ADF pressure plate cover removal” on page 4-226 Use a flat-blade screwdriver to open the latch (C) the output sensor card. Remove the ADF exit sensor and cable. 4-217 Repair information...

  • Page 478: Adf Hinge (Left And Right) Removal

    7526 ADF hinge (left and right) removal The hinges are removed in a similar manner. Only one hinge is shown in this removal. Remove the ADF. See “ADF removal (entire)” on page 4-210. Turn the ADF over. Remove the four screws (A) of the hinge you want to remove. Remove the hinge.

  • Page 479: Adf Motor Gear Train Removal

    7526 ADF motor gear train removal Remove the ADF motor side cover. See “ADF motor side cover removal” on page 4-194. Disconnect the three connectors (A). Remove the two screws (B), and the two ground screw (C). Remove the ADF motor gear train. Note: Be sure to note the routing of the clutch motor cable.
  • Page 480 7526 Installation notes: Place the ADF motor gear train assembly over the clutch motor, and make sure the clutch motor cable (A) is through the housing. Make sure the fork of the clutch assembly (B) is up, and the gear (C) is up. Slide the left side of the ADF motor gear train assembly into place, and then press down on the lever (D) with your finger to make sure the arm of the motor gear assembly slides in below the ledge.
  • Page 481 7526 Slide the right side of the ADF motor gear train assembly into place, making sure that the fork (E) engages the plate (F). Rotate the gear arm (G) down until the spring (H) latches into the frame. 4-221 Repair information...
  • Page 482 7526 Route the clutch assembly cable through the cable retainers (J). Replace the four screws (K), making sure that the ground cable (L) is attached to the indicated screw. Reconnect the cables. Replace the covers and ADF input tray. 4-222 Service Manual...

  • Page 483: Adf Paper Stop Removal

    7526 ADF paper stop removal Pull the paper stop all the way out, and slide out. ADF pick pad removal Open the ADF cover. Lift the pick pad (A), and remove the pad. Note: Although the spring is not part of the ADF pick pad FRU, be careful not to lose the spring. 4-223 Repair information...

  • Page 484: Adf Pick Pad Spring Removal

    7526 ADF pick pad spring removal Remove the ADF pick pad. See “ADF pick pad removal” on page 4-223. Lift out the spring (A). ADF pick roller assembly removal Open the ADF. Rotate the locking lever (A), and remove the ADF pick roller assembly. 4-224 Service Manual...
  • Page 485 7526 Installation notes: Install the left side of the ADF pick roller assembly first. Push the assembly flat into the ADF, while turning the gear on the right (A). When the assembly clicks into position, then rotate the locking lever until it is flat against the ADF. 4-225 Repair information...

  • Page 486: Adf Pressure Plate Cover Removal

    7526 Verify that the installation was correct by pressing the ADF pick roller into the ADF door, then pulling the door down until the ADF pick roller assembly smoothly falls forward, without falling out. ADF pressure plate cover removal Open the ADF. Use a flatblade screwdriver to release the tabs.
  • Page 487 7526 Pull the pressure plate cover down, and remove it. Installation note: Set the pressure plate face down over the glass of the flatbed, and close the ADF. The ADF pressure pad will snap into place as the ADF is lowered. 4-227 Repair information...

  • Page 488: Adf Separator Pad Removal

    7526 ADF separator pad removal Open the ADF cover. Lift the ADF separator pad (A), and remove the pad. Note: Cover the separator pad with your other hand to prevent the pad from flying away and getting lost or hitting someone. 4-228 Service Manual...

  • Page 489: Carriage Transport Belt With Clip Removal

    7526 Carriage transport belt with clip removal Remove the flatbed CCD carrier module. See “Flatbed CCD carrier module removal” on page 4-235. Remove the two screws (A) on either end of the carriage transport belt. Remove the cable from the posts. Installation notes: •...

  • Page 490: Esd Brush Removal

    7526 • Be sure to face the toothed edge (A) on the cable as shown. ESD brush removal Remove the ADF upper case cover. See “ADF upper case cover removal” on page 4-197. Gently pry the brush off the two posts with a flat-bladed screwdriver. Note: One post firmly holds the brush, and the other post is a alignment guide.

  • Page 491: Flatbed Air Filter Removal

    7526 Flatbed air filter removal Press the tab (A) and remove the filter door cover. Remove the filter. 4-231 Repair information...

  • Page 492: Flatbed Ccd Lamp Assembly Removal

    7526 Flatbed CCD lamp assembly removal Remove the flatbed with glass cover. See “Flatbed with glass cover removal” on page 4-201. Remove the three screws (A). Lift the cover (B) and pull it back. 4-232 Service Manual...
  • Page 493 7526 Release the two latches (C). Rotate the lamp assembly, and disconnect the cable (D). 4-233 Repair information...
  • Page 494 7526 Warning: Do not touch the lamp with your hand. Hold it only by the ends, as shown. Remove the lamp assembly. Installation notes: • Make sure the four springs (A) are in place. 4-234 Service Manual...

  • Page 495: Flatbed Ccd Carrier Module Removal

    7526 Flatbed CCD carrier module removal Remove the flatbed with glass cover. See “Flatbed with glass cover removal” on page 4-201. Remove the two screws (A), and remove the cover. 4-235 Repair information...
  • Page 496 7526 Disconnect the two CCD cables (B). Warning: Be careful disconnecting and reconnecting the ribbon cables. Ribbon cables can be damaged easily and should be handled carefully. Loosen the ground screw (C), and remove the screw (D). 4-236 Service Manual...
  • Page 497 7526 Rotate the clip (E). Lift rod and slide the flatbed CCD carrier module off the rod. 4-237 Repair information...
  • Page 498 7526 Installation note: Be sure to route the carriage transport belt correctly. 4-238 Service Manual...

  • Page 499: Flatbed Cooling Fan Removal

    7526 Flatbed cooling fan removal Remove the flatbed with glass cover. See “Flatbed with glass cover removal” on page 4-201. Remove the four (A) screws. Remove the fan. 4-239 Repair information...

  • Page 500: Flatbed Scanner Removal

    7526 Flatbed scanner removal Remove the ADF. See “ADF removal (entire)” on page 4-210. Remove the right cover. See “Right cover removal” on page 4-39. Remove the two screws (A) and the smaller screw (B) on the right side. 4-240 Service Manual...
  • Page 501 7526 Disconnect the two cables (C) at the connectors on the MDC card (ribbon cable). Note: Be careful disconnecting and reconnecting the ribbon cables. Ribbon cables can be damaged easily and should be handled carefully. Remove the 3 long screws (D) and the two short screws (E).. 4-241 Repair information...
  • Page 502 7526 Slide the flatbed scanner forward, and lift it up to remove it. Warning: Whenever you replace the ADF (entire), the flatbed scanner, or the MDC card, perform the “Scanner Manual Registration” in Configuration menu. To enter Config Menu: Turn off the multifunction printer. Press and hold 2 and 6.

  • Page 503: Paper Present Led Card Removal

    7526 Paper present LED card removal Remove the input tray. See “Input tray removal” on page 4-204. Remove the six screws (A) securing the underside of the input tray. Disconnect the cable at the connector (B). Note: Observe the routing of the cable for re-installation. Remove the screw (C) securing the LED to the input tray, and removal the paper present LED card.

  • Page 504: Scanner Icc Card Removal

    7526 Scanner ICC card removal Remove the ADF. See “ADF removal (entire)” Turn the ADF over. Be sure to brace the ADF to prevent damage. Remove the three screws (A) securing the MDC cable cover, and remove the cover. Disconnect the ICC cable (B) from the scanner ICC card. Turn the ADF over.

  • Page 505: Scanner Icc Cable Removal

    7526 Remove the two screws (C), and the ground cables from the screws (D). Note: Be sure to reconnect the ground cables when you reinstall the card. Remove the card. Scanner ICC cable removal Remove the ADF. See “ADF removal (entire)” Turn the ADF over.
  • Page 506 7526 Remove the screw (C) securing the cable tie-down, and remove the cable from the tie-down. Remove the cable from the cable restraints (D), and note the routing. Open the clips (E) on the toroid, and set it aside for reinstallation later. Turn the ADF over.

  • Page 507: Scanner Mdc Card Removal

    7526 Scanner MDC card removal Warning: When replacing any one of the following components: • Scanner MDC card • System board Only replace one component at a time. Replace the required component, and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable.
  • Page 508 7526 Disconnect the eight cables (C) from the MCD card Warning: Be careful disconnecting and reconnecting the ribbon cables. Ribbon cables can be damaged easily and should be handled carefully. Remove the three screws (D) from the MDC card cage. Remove the MDC card cage.
  • Page 509 7526 Remove the three screws (E) securing the MDC card, and remove the MDC card. Warning: Whenever you replace the ADF (entire), the flatbed (entire), or the MDC card, perform the “Scanner Manual Registration” in Configuration menu. To enter Config Menu: Turn off the multifunction printer.

  • Page 510: High-Capacity Input Tray (Hcit) Option Removals

    7526 High-capacity input tray (HCIT) option removals HCIT media tray assembly removal Note: When removing the high-capacity input tray (HCIT) media tray assembly, it is not necessary to remove it from the base machine and the caster base. Open the HCIT media tray assembly (A) until it reaches a stop. Press the latches (B) on the left and right side of the HCIT tray slides.

  • Page 511: Hcit Front Tray Cover Removal

    7526 HCIT front tray cover removal Note: When removing the high-capacity input tray (HCIT) front tray cover, it is not necessary to remove the HCIT media tray assembly from the base machine and the caster base. Remove the HCIT media tray assembly. See “HCIT media tray assembly removal”...

  • Page 512: Hcit Rear Cover Removal

    7526 HCIT rear cover removal Remove the four screws (A) securing the HCIT rear cover to the drawer. Remove the HCIT rear cover. 4-252 Service Manual...

  • Page 513: Hcit Right Cover Removal

    7526 HCIT right cover removal Carefully remove the printer or multifunction printer from the high-capacity input tray (HCIT) and remove the HCIT from the caster base. Remove the HCIT media tray assembly. See “HCIT media tray assembly removal” on page 4-250.

  • Page 514: Hcit Left Cover Removal

    7526 HCIT left cover removal Carefully remove the printer or multifunction printer from the high-capacity input tray (HCIT) and remove the HCIT from the caster base. Remove the HCIT media tray assembly. See “HCIT media tray assembly removal” on page 4-250.

  • Page 515: Feed With Bushing Roller Removal

    7526 Feed with bushing roller removal Remove the high-capacity input tray (HCIT) top plate assembly. See “Top plate assembly removal” on page 4-264. Remove the four screws (A) securing the pass thru sensor bracket to the top plate assembly. Note: The bushing may come off when removing the pass thru sensor bracket. Remove the screw (B) securing the 46T gear (C) to the top plate assembly.

  • Page 516: Hcit Controller Board Assembly Removal

    7526 HCIT controller board assembly removal Remove the HCIT right cover. See “HCIT right cover removal” on page 4-253. Disconnect the seven connectors (A) from the HCIT controller board. Remove the ground screw (B) from the HCIT controller board. Remove the two screws (C) securing the HCIT controller board to the card mount option. Remove the HCIT controller board.

  • Page 517: Hcit Drawer Slide Assembly Removal

    7526 HCIT drawer slide assembly removal The left and right drawer slide assemblies are the same, and only one is in a package. The instructions below are for removing the left slide, but removing the right slide is similar. Remove the HCIT media tray assembly. See “HCIT media tray assembly removal”...
  • Page 518 7526 Release the hooks (B) securing the pass thru sensor to the top plate assembly. Remove the pass thru sensor from the top plate assembly. Release the harness from the clamps (C). Remove the eight screws (D) securing the elevator motor with sensor to the side frame. Remove the elevator motor with sensor.

  • Page 519: Hcit Pick Tires Removal

    7526 HCIT pick tires removal Remove the high-capacity input tray (HCIT) media tray assembly. See “HCIT media tray assembly removal” on page 4-250. Pull the autocompensator pick arm (A) down. Remove the pick tire (B) from the pick roll assembly (C). Repeat for the other pick tire (D).

  • Page 520: Hcit Slide Assembly With Spring Removal

    7526 HCIT slide assembly with spring removal Remove the HCIT controller board assembly. See “HCIT controller board assembly removal” on page 4-256. Disconnect the two springs (A) from the frame. Note: Leave the springs attached to the cam size sensing plate (B) and the actuator switch. Slide the cam size sensing plate (B) through the access hole in the rear side frame.
  • Page 521 7526 Remove the four screws (E) securing the card mount option to the frame. Remove the card mount option. Installation note: Place the card mount option into position, and secure it with the four screws. Reinstall the media size actuator to the card mount option. Reinstall the actuator switch with spring through the inside of the drawer.

  • Page 522: Photointerrupter Sensor With Cable Assembly Removal

    7526 Photointerrupter sensor with cable assembly removal Remove the high-capacity input tray (HCIT) right cover. See “HCIT right cover removal” on page 4-253. Disconnect the photointerrupter sensor cable connector (A) from the HCIT controller board. Turn the drawer rear side down, and use 4.0 mm wrench to remove the four allen screws (B) securing the counterweight to the rear frame.
  • Page 523 7526 Remove the screw (C) securing the sensor to the rear frame, and then release the hooks (D). Note: Remove the cable from the restraint, and observe the routing for reinstallation. Remove the photointerrupter sensor with cable assembly. 4-263 Repair information...

  • Page 524: Top Plate Assembly Removal

    7526 Top plate assembly removal Remove the high-capacity input tray (HCIT) right cover. See “HCIT right cover removal” on page 4-253. Disconnect the five connectors (A) from the HCIT controller board. 4-264 Service Manual...
  • Page 525 7526 Release the hooks (B) securing the pass thru sensor from the top plate assembly. Remove the fourteen screws (C) securing the top plate assembly to the frame. Remove the top plate assembly. 4-265 Repair information...
  • Page 526 7526 4-266 Service Manual...

  • Page 527: Connector Locations

    7526 5. Connector locations Locations—printer base Connector locations...

  • Page 528: Connectors

    7526 Connectors System board Service Manual...
  • Page 529 7526 System board listing “System board” on page 5-2. Connector Pin # Signal Pin # Signal Ground FBR_LVDS_MCLK+ AIO motor driver control (MDC) FBR_LVDS_MCLK- Ground FBR_LVDS_RXCLK- FBR_LVDS_RXCLK+ Ground FBR_LVDS_RXIN2+ FBR_LVDS_RXIN2- Ground FBR_LVDS_RSIN1+ FBR_LVDS_RXIN1- Ground FBR_LVDS_RXIN0- FBR_LVDS_RXIN0+ Ground FBR_AFE_NRST_R Ground FBR_AFE_SDIO-R FBR_AFE_SCK_R FBR_AFE_SEN_ FBR_AFE_SH_R...
  • Page 530 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal Ground Internal Service Port (ISP) USBOUT+ USBOUT- Ground USBIN+ USBIN- Ground RESET +5 V dc I2C_DAT +5 V dc I2C_CLK +5 V dc Ground Feedback Vortext UART MDC MDC_RXD...
  • Page 531 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal D_PHY_TX+ Network D_PHY_TX- D_PHY_RD+ V_ANA2.5 V_ANA2.5 D_PHY_RD V_BOBSMITH +2.5V_PHY_I PHYLED0 +2.5V_PHY_I PHYLED1 PHYLED0 +2.5V_PHY_I PHYLED1 +2.5V_PHY_I +5 V dc +5 V dc or Ground FANSENSE JBIN1 VS12_BF...
  • Page 532 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JCARTP1 V48_CART1_WIND_W Cartridge 1/fuser motors V48_CART1_WIND_V V48_CART1_WIND_U V24_FUSER2_W V24_FUSER2_V V24_FUSER2_U JCARTP2 V48_CART3_WIND_W Cartridge 2/cartridge 3 motors V48_CART3_WIND_V V48_CART3_WIND_U V48_CART2_WIND_W V48_CART2_WIND_V V48_CART2_WIND_U JCARTS1 TG_CART1_FG TG_CART1_HALL_U Cartridge 1/fuser motors +5V_SW...
  • Page 533 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JDX1 VS12_DUP_ENC_LED Duplex / MFP BDC motor drive S_DUP_MPF_ENC Ground V24_DUP_MPF_M- V24_DUP_MPF_M+ JFAN1 Ground System fan V18_FAN_MTR S_FAN_FG JFDPCK1 VS12_FEED_ENC V24_PICK_M+ Paper Feed/Waste Toner Motor S_FEED_ENC V24_PICK_M- and Tray 1 Pick...
  • Page 534 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JHVPS1 Ground +25VD High-voltage power supply C-DEVPWM M-DEVPWM Y-DEVPWM K-DEVPWM Ground +5V_SW TONER_C TONER_M TONER_Y TONER_K GD_HV_CHRG_PWM V_SNS GD_HV_XFR_PWM_C C_SRVO_OUT GD_HV_XFR_PWM_M M_SRVO_OUT GD_HV_XFR_PWM_Y Y_SRVO_OUT PC_SNS +5V_HVPS...
  • Page 535 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JOPP1 I2C_DATA Operator panel (12C) V12_PANEL+5V I2C_CLK Ground TG_OP_IRQ- +3.3 V dc Ground JOPT1 +25VE Ground Option port S_OPT_RXR Ground S_INPUT_FDT VS24_OPT_5V Ground S_OPT_TXR JPH1 VDO_SYNC_C...
  • Page 536 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JPH1 D_VDO_B+ Printhead D_VDO_B- (continued) Ground D_VDO_A2+ D_VDO_A2- Ground D_VDO_A+ D_VDO_A- Ground I2C_CLK_PH TG_VDO_LADJ_CD I2C_DATA_PH TG_VDO_LADJ_AB JSB1 S_SB_Y Cartridge SB Ground S_SB_C Ground S_SB_M Ground S_SB_K...
  • Page 537 7526 System board listing (continued) “System board” on page 5-2. Connector Pin # Signal Pin # Signal JTPS1 V12_LED_ON VS12_3_3V Toner Patch Sensor GD_TPS_SNS GD_TPS_PWM1 GD_TPS_SNS_RTN GD_TPS_TNR_SNS Ground I2C_CLK_TB I2C_DATA_TB GD_TPS_THERM_SNS JTRAY1 Ground Tray 1 input, NMT sensors S_TRAY_INPUT VS12_TRAY_INPT_LED VS12_TRAY+5V_NMT S_TRAY_NMT Ground...
  • Page 538 7526 5-12 Service Manual...

  • Page 539: Preventive Maintenance

    Damaged, missing, or altered covers, especially in the area of the top cover and the power supply cover • Possible safety exposure from any non-Lexmark attachments Lubrication specifications Lubricate only when parts are replaced or as needed, not on a scheduled basis. Use of lubricants other than those specified can cause premature failure.

  • Page 540: Maintenance

    7526 Maintenance Cleaning the scanner glass Clean the scanner glass if you encounter print quality problems, such as streaks on copied or scanned images. Slightly dampen a soft, lint-free cloth or paper towel with water. Open the scanner cover. White underside of the ADF cover White pressure plate cover Scanner glass ADF glass...

  • Page 541: Cleaning The Adf Parts

    7526 Cleaning the ADF parts Clean the ADF parts periodically to maintain optimal printing performance. Residue on the ADF parts may cause print quality issues and false 290–294 paper jam messages. Turn the printer off. Slightly dampen a soft, lint-free cloth with water. Open the ADF cover.
  • Page 542 7526 Wipe the entire surface under the ADF cover, including the two small white rollers. Wipe the separator pad, and then wipe the pick pad. Pull the flap up as shown, and then wipe the sensor behind it. Close the flap, and then close the ADF cover. Service Manual...

  • Page 543: Cleaning The Printhead Lenses

    7526 Cleaning the printhead lenses Clean the printhead lenses when you encounter print quality problems. Turn the printer off, and disconnect the power cord. Open the upper front door, and then open the lower front door. Warning: Potential Damage—To avoid overexposing the photoconductors, do not leave the front doors open for more than 10 minutes.
  • Page 544 7526 Service Manual...

  • Page 545: Parts Catalog

    • Model information used in the parts catalog: Abbreviation Machine Model name Description used type/model 7526-235 Lexmark X734de 4-in-1 Color MFP 7526-275 Lexmark X734de 4-in-1 Color MFP, with fax modem 7526-295 Lexmark X734de 4-in-1 Color MFP, with fax modem 7526-436...

  • Page 546: Assembly 1: Covers-Printer

    7526 Assembly 1: Covers—printer Service Manual...
  • Page 547 7526 Assembly 1: Covers—Printer Units/ Units/ Index Description mach 1—1 40X5164 Output bin extension cover 40X5175 Top cover assembly 40X5174 Rear cover 40X5121 Top access cover sensor Parts package (top access cover) (P/N 40X5180), including A—Link (top access cover) (2) B—Link (top cover) (2) D—Top access cover links (slider cam) (1) C—Top access door link spring (2)

  • Page 548: Assembly 2: Front

    7526 Assembly 2: Front Service Manual...
  • Page 549 7526 Assembly 2: Front Units/ Units/ Index Description mach 2—1 40X5093 Fuser assembly, 115 V 40X5094 Fuser assembly, 230 V 40X5095 Fuser assembly, 100 V Printer pad, included in parts packet, screws (P/N 40X5136) 40X1446 Right bellcrank assembly, with spring 40X5132 Parts packet, MP feeder/duplex drive, including: •...

  • Page 550: Assembly 3: Right

    7526 Assembly 3: Right Service Manual...
  • Page 551 7526 Assembly 3: Right Units/ Units/ Index Description mach 3–1 40X5125 EP drive assembly 40X5182 Low-voltage power supply 40X5126 Motor driver card 40X5131 MP feeder/duplex motor 40X5128 24 V interlock switch 40X5127 5 V interlock switch Parts catalog...

  • Page 552: Assembly 4: Rear

    7526 Assembly 4: Rear Service Manual...
  • Page 553 7526 Assembly 4: Rear Units/ Units/ Index Description mach 4—1 40X5123 Printhead assembly 40X5107 System board support shield 40X5200 System board (network), 235, 275, 295 40X5271 System board (network), 436, 476, 496, 636, 676 40X0269 Power cord—USA, Canada, Bolivia, Peru 40X0288 Power cord (8 ft.)—Argentina 40X0301...

  • Page 554: Assembly 5: Left

    7526 Assembly 5: Left (4 places) (4 places) (4 places) (4 places) (4 places) (4 places) (8 places) 7-10 Service Manual...
  • Page 555 7526 Assembly 5: Left Units/ Units/ Index Description mach 5—1 40X5137 Contact springs kit, including: • A—Torsion PCD contact spring • B—Torsion CR contact spring • C—Contact spring cap • D—Charge roll contact spring • E—HVPS TAR contact spring • F—HVPS doctor/developer contact spring •...

  • Page 556: Assembly 6: Top

    7526 Assembly 6: Top Units/ Units/ Index Description mach 6—1 40X5109 Cooling fan 40X5122 Color on demand assembly 40X5130 Top cover camshaft assembly 40X5108 Cartridge cooling fan 7-12 Service Manual...

  • Page 557: Assembly 7: Cable Parts Packet

    7526 Assembly 7: Cable parts packet Units/ Units/ Index Description mach 7—NS 40X5183 Cables, including • MPF/duplex motor cable (1) • High-voltage power supply • Cartridge motor 1/fuser cable (1) • Cartridge motor 2 /3 • Motor driver cable • Option cable (1) •...

  • Page 558: Assembly 8: Covers-Scanner

    7526 Assembly 8: Covers—scanner 7-14 Service Manual...
  • Page 559 7526 Assembly 8: Covers—Scanner Units/ Units/ Index Description mach 8—1 40X5196 ADF front case cover 40X5202 ADF upper motor side cover 40X5192 ADF document input tray 40X5193 ADF paper stop 40X5194 Pressure plate cover 40X5198 Flatbed filter door cover 40X5218 Flatbed air filter 40X5207 Scanner rear cover...

  • Page 560: Assembly 9: Automatic Document Feeder (Adf)

    7526 Assembly 9: Automatic document feeder (ADF) 7-16 Service Manual...
  • Page 561 7526 Assembly 9: Automatic document feeder (ADF) Units/ Units/ Index Description mach 9—1 40X5190 ADF, complete Parts packet—cables (40X5217) A—ADF input tray cable B—ADF case cable Note: Additional cables listed in assembly 10 (5 total). 40X5210 Paper present LED card 40X5209 ADF hinge (left or right) 40X5166...

  • Page 562: Assembly 10: Flatbed Scanner

    7526 Assembly 10: Flatbed scanner 7-18 Service Manual...
  • Page 563 7526 Assembly 10: Flatbed scanner Units/ Units/ Index Description mach 10—1 40X5167 Flatbed scanner, complete 40X5215 Cave LED card 40X5216 Flatbed cave LED cover (clear) 40X5213 Flatbed CCD lamp assembly 40X5212 Flatbed CCD carrier module, including lamp assembly 40X5214 Carriage transport belt with clip 40X5219 Scanner MDC card 40X5199...

  • Page 564: Assembly 11: Optional 550-Sheet Media Drawer And Tray

    7526 Assembly 11: Optional 550-sheet media drawer and tray Units/ Units/ Index Description 11—1 40X5140 550-sheet tray option (drawer and tray assembly) 40X5168 Pick tire (550-sheet tray) 40X5141 550-sheet tray assembly 7-20 Service Manual...

  • Page 565: Assembly 12: Optional Special Media Tray Assembly

    7526 Assembly 12: Optional special media tray assembly Units/ Units/ Index Description opt. 12—1 40X5142 Special media assembly, including tray 40X5152 Pick tire (550-sheet drawer) 40X5143 Special media tray assembly 7-21 Parts catalog...

  • Page 566: Assembly 13: Optional High-Capacity Input Option (Hcit)

    7526 Assembly 13: Optional high-capacity input option (HCIT) 7-22 Service Manual...
  • Page 567 7526 Assembly 13: Optional high-capacity input option (HCIT) Units/ Units/ Index Description option 13—1 40X5157 Top plate assembly 40X5168 HCIT pick tire 40X5156 Feed with bushing 40X5149 HCIT rear cover 40X4585 Tray latch with spring 40X5159 HCIT controller card assembly 40X4587 Slide assembly with springs 40X5147...

  • Page 568: Assembly 14: Options And Features

    7526 Assembly 14: Options and features 7-24 Service Manual...
  • Page 569 Traditional Chinese font card 40X5970 Simplified Chinese font card 40X5972 Japanese font card 40X0047 Bar code and Forms card 40X5952 Lexmark PrintCryption™ card 40X4826 MarkNet™ N8120 10/1000 40X4827 MarkNet N8130 10/100 fiber 40X4823 Parallel 1284-B interface card adapter 40X4819 Serial interface card adapter 40X4822 80.0 GB hard drive assembly...
  • Page 570 7526 7-26 Service Manual...

  • Page 571: Index

    7526 Index Numerics bezel parts catalog 2-17 2-19 1xx service error codes – 4-31 removal 24 V interlock switch 4-52 bin full sensor assembly, removal 4-50 removal 3-32 Black Only Mode 2-19 2-30 2xx paper jam codes – black only retract (BOR), see color on demand assembly 2-16 3x–8x attendance messages –...
  • Page 572 7526 3-32 Color Lock Out Event Log 3-33 3-29 Color Trapping Clear Log 3-44 3-28 Disk Encryption Display Log 3-34 3-28 Download Emuls Print Log 3-43 3-29 Duplex Gloss exit diagnostics 3-35 Energy Conserve Hardware Tests 3-41 3-15 Enforce Color Order Button Test 3-42 3-16...
  • Page 573 7526 4-114 duplex motor cable, removal front access cover assembly 4-67 4-20 duplex reference edge guide removals 3-49 front cover locks front door assembly E-clip identification 4-86 left front cable removal electrophotographic (EP) drive assembly parts catalog 4-75 fuser retract link 4-83 removal parts catalog...
  • Page 574 7526 3-34 lamp, flatbed CCD lamp assembly Panel Menus 4-232 3-15 removal Panel Test 4-159 links, top access cover paper xvii 4-148 lithium battery See media 3-57 lock paper jams, error locations 2-32 4-120 flatbed lock paper path 3-49 front cover locked diagram 3-49 front cover locks...
  • Page 575 7526 2-152 4-32 solid color page operator panel buttons 2-153 4-36 vertical banding output bin extension cover 4-37 printer pads rear cover 4-38 parts catalog rear frame cover 4-126 4-39 removal right cover 4-41 printhead top access cover assembly 4-45 clean lenses top cover assembly parts catalog...
  • Page 576 7526 4-250 HCIT media tray assembly separator pad HCIT photointerrupter sensor with cable assembly spare 4-262 serial number 4-259 3-24 HCIT pick tires viewing 4-252 HCIT rear cover service checks 4-253 2-40 HCIT right cover 110.xx—Mirror motor 4-260 2-41 HCIT slide assembly with spring 111.xx–114.xx—printhead error 4-264 2-42...
  • Page 577 7526 supplies, ADF supply space symptoms print quality printer system board parts catalog 4-148 removal system board support shield parts catalog 4-154 removal test pages 3-14 3-32 print quality test pages Quick Test 3-18 quick test (duplex) toner level sensor 7-10 parts catalog 4-157...
  • Page 578 7526 Service Manual...

  • Page 579: Part Number Index

    7526 Part number index Description Page 40X0047 Bar code and Forms card - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-25 40X0088 Card for IPDS and SCS/TNe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 580 7526 40X5128 24 V interlock switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40X5129 High-voltage power supply - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-11...
  • Page 581 Lexmark PrintCryption card - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 582 7526 I-12 Service Manual...

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