Page 1 Brother Color Laser MFC SERVICE MANUAL MODEL: DCP-L8400CDN/L8450CDW MFC-L8600CDW/L8650CDW MFC-L8850CDW/L9550CDW Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. March 2014 SM-FAX157 8CE5* Confidential...
Page 2 Each company whose software title is mentioned in this manual has a Software License Agreement specific to its proprietary programs. Any trade names and product names of companies appearing on Brother products, related doc- uments and any other materials are all trademarks or registered trademarks of those respective companies.
Page 3 OPEN SOURCE LICENSING REMARKS This product includes open-source software. Please visit the Brother Solutions Center at http://solutions.brother.com/ to view the Open Source Licensing Remarks and Copyright information. COPYRIGHT AND LICENSE ©2014 Brother Industries, Ltd. All rights reserved. This product includes software developed by the following vendors: ©1983-1998 PACIFIC SOFTWORKS, INC.
Page 4: Table Of Contents
CONTENTS SAFETY INFORMATION ..............I CHAPTER 1 SUPPLEMENTAL SPECIFICATIONS 1.1 General ........................1-1 1.2 Network Connectivity ....................1-3 1.3 Service Information..................... 1-4 1.4 Supplies ........................1-5 1.5 Paper .......................... 1-7 1.5.1 Media specifications for ADF................1-7 1.6 Telephone ........................1-7 1.7 FAX (Only for the models with FAX function) .............
Page 5 3.3 Communications Error Code ..................2-35 4. TROUBLESHOOTING ................2-39 4.1 Error Cause and Remedy ..................2-39 4.2 Troubleshooting for Paper Feeding Problems ............2-87 4.2.1 No paper feeding from paper tray 1..............2-87 4.2.2 No paper feeding from T2 paper tray unit............2-88 4.2.3 No paper feeding from MP tray ...............
Page 6 4.11.1 No feeding ....................2-123 4.11.2 Double feeding..................... 2-123 4.11.3 Paper jam ....................2-124 4.11.4 Document becomes wrinkled............... 2-126 4.11.5 Document size cannot be correctly detected ..........2-126 4.12 Scanning Image Defect Troubleshooting.............. 2-127 4.12.1 Image defect examples ................2-127 4.12.2 Troubleshooting image defect ..............
Page 7 9.6 Cord Hook ........................ 3-40 9.7 Side Cover L ......................3-41 9.8 Side Cover R ......................3-45 9.9 Duplex Tray ......................3-49 9.10 MP Cover ASSY/MP Paper Guide ASSY ............... 3-50 9.11 MP Link L/MP Link R ....................3-53 9.12 Front Cover......................3-54 9.13 Front Cover Release Button/Front Cover Release Button Spring ......
Page 8 9.43 Back Cover Upper (A4 Model Only) ..............3-133 9.44 Joint Cover USB ASSY ..................3-134 9.45 Wireless LAN PCB ....................3-136 9.46 Main PCB ASSY ....................3-137 9.47 Laser Unit Flat Cable/Laser Unit ................3-139 9.48 Front Cover Sensor ....................3-143 9.49 Process Drive Unit/Fuser Drive Gear Z25 ............
Page 9 CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT 1. IF YOU REPLACE THE MAIN PCB ASSY ..........4-1 1.1 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware) ..................4-2 1.1.1 Checking firmware version ................4-2 1.1.2 Installing the firmware..................
Page 10 7. IF YOU REPLACE THE LASER UNIT .............4-12 7.1 Continuous Adjustments of Density and Registration Sensor (Function code 73)....................4-12 7.2 Counter Reset of Laser Unit (Reset Counters for Parts (Function code 88)) ... 4-12 8. IF YOU REPLACE THE FIRST SIDE CIS UNIT, DOCUMENT SCANNER UNIT ..............4-13 8.1 Acquisition of White Level Data (Function code 55) ..........
Page 11 1.3.15 Changing return value of USB No./Switching Dither Pattern/ Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color/ Switching of timing to execute Auto Registration/ Adjusting left-end print start position on second side in duplex printing/ Change of the transfer current setting/Change of ghost reduction setting (Function code 45)..................
Page 12 CHAPTER 6 WIRING DIAGRAM 1. WIRING DIAGRAM ..................6-1 CHAPTER 7 PERIODICAL MAINTENANCE 1. SAFETY PRECAUTIONS ................7-1 2. PERIODICAL REPLACEMENT PARTS ............7-2 2.1 Procedures to Replace Periodical Replacement Parts..........7-2 2.1.1 Fuser unit......................7-3 2.1.2 Laser unit......................7-12 2.1.3 PF kit 1 ......................7-42 2.1.4 PF kit 2 ......................
Page 13: Safety Information
SAFETY INFORMATION  Definitions of Warnings, Cautions, Notes and Memos The following conventions are used in this manual: Mark Contents WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injuries. CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injuries.
Page 14  To use the Machine Safely Please keep these instructions for later reference and read them before attempting any maintenance. If you do not follow these safety instructions, there is a possibility of a fire, electrical shock, burn or suffocation. WARNING ELECTRICAL HAZARDS Failure to follow the warnings in this section may create the risk of an electrical shock.
Page 15 Doing so may cause the cord to become worn or frayed. - Brother strongly recommends that you DO NOT use any type of extension cord. (MFC only) Use caution when installing or modifying telephone lines. Never touch telephone wires or terminals that are not insulated unless the telephone line has been unplugged from the wall jack.
Page 16 DO NOT attempt to operate this product when a paper jam or stray pieces of paper are inside the product. Prolonged contact of the paper with the fuser unit could cause a fire. DO NOT use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner dust to ignite inside the vacuum cleaner, potentially starting a fire.
Page 17 (DCP-L8400CDN/MFC-L8600CDW/MFC-L8650CDW ONLY) Some areas of the product can cause injury if covers (shaded) are closed with force. Take care when placing your hand in the areas shown in the illustrations, and DO NOT close the covers with force. (MFC and DCP only)
Page 18  Caution for Laser Product (WARNHINWEIS für Laserdrucker ) CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To prevent direct exposure to the laser beam, do not try to open the enclosure of the laser unit. ACHTUNG: Im Falle von Störungen der Lasereinheit muß...
Page 19 If you have questions about what will disable alarm equipment, call your telephone company or a qualified installer. If you are not able to solve a problem with your product, contact Brother Customer Service (see Basic User's Guide: Brother numbers).
Page 20 - This equipment may not be used on coin service lines provided by the telephone company or connected to party lines. - Brother cannot accept any financial or other responsibilities that may be the result of your use of this information, including direct, special or consequential damages. There are no warranties extended or granted by this document.
Page 21: Chapter 1 Supplemental Specifications
Two-sided One-sided Two-sided Two-sided Two-sided     Model DCP-L8400CDN DCP-L8450CDW Warm-up From Sleep Less than 31 seconds at 73.4F (23 °C/50 %) time mode From Power Less than 33 seconds at 73.4F (23 °C/50 %) OFF →ON First print...
Page 22 MFC- MFC- MFC- MFC- Model L8600CDW L8650CDW L8850CDW L9550CDW Warm-up From Sleep Less than 31 seconds at 73.4F (23 °C/50 %) time mode From Power Less than 33 seconds at 73.4F (23 °C/50 %) OFF →ON First print From Ready Monochrome/Full Color: Monochrome/ Monochrome/...
Page 23: Network Connectivity
Network Connectivity Model DCP-L8400CDN DCP-L8450CDW Wired Network NC-8600h type2 network node type Wireless Network NC-8200w type2 network node type Specifications are subject to change without prior notice. MFC- MFC- MFC- MFC- Model L8600CDW L8650CDW L8850CDW L9550CDW Wired Network NC-8600h type2...
Page 24: Service Information
Service Information Model DCP-L8400CDN DCP-L8450CDW Machine life 200,000 pages (A4/Letter size) or 5 years Part life (ADF) Up to 50,000 pages or 5 years Part life Up to 50,000 pages or 5 years (Document Scanner Unit) MTBF 4,000 hours MTTR 0.5 hours...
Page 25: Supplies
Supplies Model DCP-L8400CDN DCP-L8450CDW Toner Starter Black Approximately 2,500 pages (except for China) cartridge Toner Approximately 4,000 pages (for China) Cyan, Approximately 1,500 pages (except for China) Magenta, Approximately 3,500 pages (for China) Yellow Standard Black Approximately 2,500 pages (except for China)
Page 26 MFC- MFC- MFC- MFC- Model L8600CDW L8650CDW L8850CDW L9550CDW Toner Starter Black Approximately 2,500 pages (except for China) Approximately cartridge Toner Approximately 4,000 pages (for China) 6,000 pages (except for Asia) Approximately 2,500 pages (for Asia) Cyan, Approximately 1,500 pages (except for China) Approximately Magenta, Approximately 3,500 pages (for China)
Page 27: Paper
All Models Model Drum unit Life expectancy: Approximately 25,000 pages (1 page/job) The life expectancy varies according to the use condition. Shelf life: 2 years The shelf life of toner cartridge and drum unit is guaranteed under the normal condition as below; (Temperature) Normal condition: 0 to 40 °C * Storage condition at the temperature of 40 to 50 °C: Up to 5 days * Storage condition at the temperature of -20 to 0 °C: Up to 5 days...
Page 28: Fax (Only For The Models With Fax Function)
FAX (Only for the models with FAX function) Model DCP-L8400CDN DCP-L8450CDW Modem Speed Transmission speed ITU-T group Color FAX Sending Receiving Internet FAX (ITU T.37 simple mode) Specifications are subject to change without prior notice. MFC- MFC- MFC- MFC- Model...
Page 29: Copy
Copy Model DCP-L8400CDN DCP-L8450CDW Copy Speed (A4/Letter) Monochrome/Full Color: Monochrome/Full Color: Up to 28/30 ppm Up to 30/32 ppm First copy From Ready Monochrome/Full Color: Less than 18/20 seconds out time mode and Paper tray From Sleep Monochrome/Full Color: Less than 39/41 seconds...
Page 30: Scanner
Scanner Model DCP-L8400CDN DCP-L8450CDW Resolution Maximum scanning 1,200 (main scanning) x 2,400 dpi (Optical) (sub scanning) Maximum scanning 1,200 (main scanning) x 600 dpi (sub scanning) Resolution (Interpolated) Maximum scanning 19,200 (main scanning) x 19,200 dpi (sub scanning) Scanning Monochrome 1.99 seconds (Letter)/ 1.68 seconds (Letter)/...
Page 31: Chapter 2 Error Indication And Troubleshooting
CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING INTRODUCTION Troubleshooting is the countermeasure procedures that the service personnel should follow if an error or malfunction occurs with the machine. It is impossible to anticipate all of the possible troubles which may occur in future and determine the troubleshooting procedures, so this chapter covers some sample troubles.
Page 32 WARNING DO NOT use any flammable spray or flammable solvent such as alcohol, benzine, or thinner in or around the machine. Otherwise a fire or electric shock may result. (5) Check again that the portions and parts repaired or removed during the repair work function properly when the repair is completed.
Page 33: Checks Before Commencing Troubleshooting
Checks before Commencing Troubleshooting Check the following items before attempting to repair the machine. ■ Operating environment (1) The machine is placed on a flat, stable surface. (2) The machine is used in a clean environment where the temperature is between 10 °C (50 °F) and 32.5 °C (90.5 °F) and the relative humidity is maintained between 20 % and 80 %.
Page 34 ■ Cleaning Use a soft dry lint-free cloth. WARNING DO NOT use any flammable spray or flammable solvent such as alcohol, benzine, or thinner to clean the machine. DO NOT use these articles near the machine. Confidential...
Page 35: Overview
OVERVIEW Cross-section Drawing 2.1.1 Printer part Exposure drum (Yellow) Exposure drum (Cyan) <Back side> <Front side> Eject roller 3 Exposure drum (Magenta) Exposure drum (Black) Eject roller 2 Registration rear actuator Registration roller MP registration front actuator Eject roller 1 MP separation roller Eject actuator MP paper pick-up roller...
Page 36: Scanning Part
2.1.2 Scanning part <Left side> <Right side> Second side CIS unit (Duplex scanning model only) ADF separation pad Document detection actuator Second side Document separate roller document hold Document pick-up roller Flap ADF ADF cover Document feed Document Document pick-up roller holder roller ASSY1 pinch roller ADF document support...
Page 37: Paper Feeding
Paper Feeding 2.2.1 Printer part Duplex path <Back side> <Front side> Paper eject from the back side. Paper feed from the MP tray. Paper tray 1 path T2 paper tray unit path Fig. 2-3 Confidential...
Page 38: Scanning Part
2.2.2 Scanning part <Left side> <Right side> Document scanning feed path [Face up] Fig. 2-4 Confidential...
Page 39: Operation Of Each Part
Operation of Each Part Part name Operation T1 paper pick-up roller Feed the paper from the paper tray 1 to T1 separation roller. T1 separation roller, Separates the paper fed from paper tray 1 into single sheets. T1 separation pad T1 paper feed actuator Detect whether or not the paper tray 1 is installed (open or (T1 paper feed sensor)
Page 40 Part name Operation T2 separation roller, Separates the paper fed from T2 paper tray unit into single T2 separation pad sheets. T2 paper feed actuator Detect whether or not the T2 paper tray unit is installed (T2 paper feed sensor) (open or closed).
Page 41: Block Diagram
Block Diagram Control panel ASSY Laser unit LD SUB BD sensor PCB ASSY PCB ASSY NFC PCB ASSY Key PCB ASSY Panel control Polygon motor LD PCB ASSY PCB ASSY Touch panel Front cover sensor Color LCD Back cover sensor ASSY USB host relay PCB ASSY High-voltage power Waste toner...
Page 42: Main Components
Main Components <Legal model> <A4 model> ADF unit ADF unit Toner cartridge Document Control panel scanner unit ASSY Control panel ASSY Document scanner unit Joint cover top Joint cover top Back cover upper Drum unit Joint cover Joint cover base ASSY base ASSY Belt unit Wireless LAN...
Page 43: Error Indications
ERROR INDICATIONS This machine includes a self-diagnosis function. If the machine does not work normally it judges that an error has occurred, and indicates the corresponding error message on the LCD, which in turn helps the service personnel to quickly find out the problem. Error Codes The shaded errors hardly occur under normal use.
Page 44 Error Refer Error Refer Description Description Codes Codes 050C When the temperature of the 2-42 1004 The registration mark sensor L 2-45 center thermistor of the fuser is dirty and cannot normally unit is higher than the idle receive reflected light. temperature, the side thermistor of the fuser unit detected a 1100...
Page 45 Error Refer Error Refer Description Description Codes Codes 2301 2A03 2302 2B01 2401 2B02 2402 2C01 2403 2C02 2404 2D01 2405 2E01 2408 2E02 2409 2E03 2501 2E04 2502 2E05 2503 2E06 2504 2E07 2601 2E08 2602 2E0A 2603 2F01 2604 2F02 2605...
Page 46 Error Refer Error Refer Description Description Codes Codes 3701 4600 Number of pages printed with 2-48 the laser unit has reached the 3702 upper limit. 3703 3801 Temperature error occurred in 2-47 4700 The waste toner sensor 2-49 the external temperature/ detected that the waste toner humidity sensor.
Page 47 Error Refer Error Refer Description Description Codes Codes 4C05 During printing, dot counter of 2-50 5902 color toner cartridge or develop 5A02 roller counter has reached the upper limit was detected. 5B02 4D01 5C02 4E01 6001 The front cover sensor detected 2-53 that the front cover was open.
Page 48 Error Refer Error Refer Description Description Codes Codes 6400 The registration mark sensor 2-56 6E00 The develop release sensor 2-59 detected that no belt unit was detected the developer roller set. disengagement or engagement failure. 6602 6F00 Machine detected that supplied 2-59 power was unstable.
Page 49 Error Refer Error Refer Description Description Codes Codes 7400 In the case of printing by feeding 2-62 8505 The T1 paper feed sensor 2-64 paper from the T2 paper tray detected that the paper tray 1 is unit, after the T2 paper feed open in 2-sided printing or sensor detects paper pass, the printing by feeding paper from...
Page 50 Error Refer Error Refer Description Description Codes Codes 8D02 The paper size which is not 2-66 9303 When paper was fed from the T2 2-69 supported by the output tray is paper tray unit, the T2 paper set for printing from the printer feed sensor detected that no driver.
Page 51 Error Refer Error Refer Description Description Codes Codes 9801 Error occurred with the value 2-72 A200 During document scanning, the 2-76 measured during color density first side document scanning adjustment performed from the position sensor detected that the control panel. document length was 90 cm or more.
Page 52 Error Refer Error Refer Description Description Codes Codes B000 The first or second side CIS flat 2-80 C004 The current time necessary for 2-82 cable was detected to be not user authentication is inserted correctly. unavailable due to time not being obtained.
Page 53 Error Refer Description Codes E701 Operation failure of the file 2-85 system of the flash ROM on the main PCB. E702 Error occurred during reading 2-85 from the flash ROM on the main PCB. E900 NFC PCB initialization failed. 2-86 EC00 Overcurrent was caused 2-86...
Page 54: Error Message
Error Message The error messages displayed on the LCD of the machine and their description are shown in the table below. Error Message Error Refer State Codes Upper line Middle line Access Function Locked. In the case of PC-print, 4.14.1 Denied authentication of print restricted 4.14.1...
Page 55 Error Message Error Refer State Codes Upper line Middle line The internal temperature sensor 6801 2-57 Cooling Wait for a while or side thermistor of the fuser unit Down detected a temperature higher than the specified value. The ADF cover sensor detected A400 2-77 Cover is...
Page 56 Error Message Error Refer State Codes Upper line Middle line After the registration rear sensor 7000 2-59 Jam Inside Open the Front detects paper pass, the eject Cover, pull out all sensor does not detect paper four drum and pass. toner cartridge assemblies and remove the...
Page 57 Error Message Error Refer State Codes Upper line Middle line User authentication is C002 2-82 Log Access Authentication unavailable due to incorrect user Error error, contact your name, incorrect password, or administrator. asynchronous date and time between the machine and server. Access to a file is unavailable C003 2-82...
Page 58 Error Message Error Refer State Codes Upper line Middle line USB HOST HUB connection 4.14.2 No HUB error Support When paper was fed from the MP 9301 2-68 No Paper Reload paper in MP tray, the MP paper empty sensor Tray.
Page 59 Error Message Error Refer State Codes Upper line Middle line While the T2 paper tray unit is 8402 2-63 No Tray The paper tray open state, print or adjustment cannot be operation was attempted. detected, re-install Tray2. The T1 paper feed sensor 8505 2-64 The paper tray...
Page 60 Error Message Error Refer State Codes Upper line Middle line Dot counter or develop roller 9A02 2-74 Registration Registration failed. counter of color toner has Insufficient Toner reached the upper limit during for Registration. auto color registration performed from the control panel. Error occurred during patch data 9A03 2-75...
Page 61 Error Message Error Refer State Codes Upper line Middle line The white level value obtained BB00 2-80 Scanner with function code 55 was Error outside the specified range. The black level value obtained BD00 2-81 with function code 55 was outside the specified range.
Page 62 Error Message Error Refer State Codes Upper line Middle line The size of paper loaded in the 9002 2-67 Reload correct Size paper tray 1 and the one paper in Tray1, mismatch specified from the driver are not then press [Retry]. same when paper is fed from the paper tray 1.
Page 63 Error Message Error Refer State Codes Upper line Middle line Number of pages printed with the 4300 2-48 Belt End Soon Supplies belt unit will reach the upper limit soon. Number of the drum unit rotations 4000 2-47 Drum End Soon. reaches the upper limit soon.
Page 64 Error Message Error Refer State Codes Upper line Middle line An USB device that did not meet 4.14.2 Unusable the specifications was inserted Device into the USB port. Overcurrent was caused EC00 2-86 Remove the because a USB device that did Device.
Page 65: Communications Error Code
Communications Error Code Code 1 Code 2 Cause Refer to: No document loaded at the time of outgoing call for 4.11.1 document transmission. Wrong FAX number called. 4.13.1 No dial tone detected before start of dialing. 4.13.1 Busy tone detected before dialing. 4.13.1 2nd dial tone not detected.
Page 66 Code 1 Code 2 Cause Refer to: Carrier was OFF for 200 ms or longer. 4.13.4 Abort detected (“1” in succession for 7 bits or more). 4.13.4 Overrun detected. 4.13.4 A frame for 3 seconds or more received. 4.13.4 CRC error in answerback. 4.13.4 Echo command received.
Page 67 Code 1 Code 2 Cause Refer to: Polled while not ready. 4.13.4 No document to send when polled. 4.11.1 Nation code or manufacturer code not correct. 4.13.1 Group number not registered in relay broadcasting 4.13.1 was selected or the total of broadcast destinations exceeded the allowed maximum destinations.
Page 68 Code 1 Code 2 Cause Refer to: Decoding error continued on 500 lines or more. 4.13.4 Decoding error continued for 15 seconds or more. 4.13.4 Time-out: 13 seconds or more for one-line 4.13.4 transmission. RTC not found or carrier OFF detected for 6 seconds. 4.13.4 RTC found but no command detected for 60 seconds 4.13.4...
Page 69: Troubleshooting
TROUBLESHOOTING Error Cause and Remedy ■ Error code 0100 Print Unable 01 Turn the power off and then back on again. ASIC error or motor driver error occurred. Step Cause Remedy Main PCB failure Replace the main PCB ASSY. ■ Error code 0201 Print Unable 02 Turn the power off and then back on again.
Page 70 ■ Error code 0300 Print Unable 03 Turn the power off and then back on again. The Lock signal of the polygon motor of the laser unit cannot be detected. Error code 0401 Print Unable 04 Turn the power off and then back on again. BD sensor 1 damaged.
Page 71 ■ Error code 0501 Print Unable 05 Turn the power off and then back on again. The center thermistor of the fuser unit does not reach the specified temperature within the specified time. Error code 0502 Print Unable 05 Turn the power off and then back on again. After the temperature of the fuser unit rises to a certain level, the temperature of the center thermistor does not reach the specified temperature within the specified period of time in the next step.
Page 72 ■ Error code 050A Print Unable 05 Turn the power off and then back on again. The center thermistor or side thermistor of the fuser unit detected some temperature error in the hardware. Error code 050B Print Unable 05 Turn the power off and then back on again. When the temperature of the center thermistor of the fuser unit is lower than the idle temperature, the side thermistor of the fuser unit detected a temperature higher than the specified value.
Page 73 ■ Error code 0800 Print Unable 08 Turn the power off and then back on again. Error occurred in the internal temperature sensor. Step Cause Remedy Connection failure of the internal Reconnect the internal temperature temperature sensor harness sensor harness. Main PCB failure Replace the main PCB ASSY.
Page 74 ■ Error code 0A02 Print Unable 0A Turn the power off and then back on again. The fuser fan failure was detected. Step Cause Remedy Connection failure of the fuser Reconnect the fuser fan harness. fan harness Connection failure of the Reconnect the high-voltage power supply high-voltage power supply PCB PCB harness.
Page 75 ■ Error code 0E00 Print Unable 0E Turn the power off and then back on again. Communication error occurred in the high-voltage power supply PCB ASSY. Step Cause Remedy Connection failure of the Reconnect the high-voltage power supply high-voltage power supply PCB PCB harness.
Page 76 ■ Error code 1400 Condensation Leave switched ON. Fully open the Front Cover. Wait 30 minutes, switch OFF and close cover, then switch ON. Condensation occurred in the machine. < User Check > - Open the front and back covers and leave them for 30 minutes or more with the power ON. After that, close the front and back covers and turn OFF and ON the power switch.
Page 77 ■ Error code 3801 Print Unable 38 Turn the power off and then back on again. Temperature error occurred in the external temperature/humidity sensor. Error code 3802 Print Unable 38 Turn the power off and then back on again. Humidity error occurred in the external temperature/humidity sensor. Step Cause Remedy...
Page 78 ■ Error code 4300 Supplies Belt End Soon Number of pages printed with the belt unit will reach the upper limit soon. (90%) Error code 4400 Supplies Replace Belt Number of pages printed with the belt unit has reached the upper limit. (Printing is not stopped.） <...
Page 79 ■ Error code 4700 Supplies WT Box End Soon The waste toner sensor detected that the waste toner box is almost full. Error code 4800 Replace WT Box Replace the Waste Toner Box inside the machine. After the waste toner sensor detected that the waste toner box was almost full, pages more than the specified number have been printed.
Page 80 ■ Error code 4C01 Replace Toner Open the Top Cover, replace Toner Cartridge. Black (BK). Dot counter of the toner cartridge (Black) or develop roller counter has reached the upper limit was detected. Error code 4C02 Replace Toner Open the Top Cover, replace Toner Cartridge. Yellow (Y). Dot counter of the toner cartridge (Yellow) or develop roller counter has reached the upper limit was detected.
Page 81 ■ Error code 4F01 Cartridge Error Put the Toner Cartridge back in. The new toner sensor of the toner cartridge (Black) could not detect a new cartridge properly. Error code 4F02 Cartridge Error Put the Yellow #C Toner Cartridge back in. The new toner sensor of the toner cartridge (Yellow) could not detect a new cartridge properly.
Page 82 ■ Error code 5001 Maintenance Replace PF Kit MP Number of used pages for the PF kit MP has reached the upper limit. (Printing is not stopped.) Step Cause Remedy The PF kit MP is at the end of life Replace the PF kit MP.
Page 83 ■ Error code 6001 Cover is Open Close the Front Cover. The front cover sensor detected that the front cover was open. < User Check > - Close the front cover. Step Cause Remedy Connection failure of the front Reconnect the front cover sensor cover sensor harness harness.
Page 84 ■ Error code 6101 No Toner Open the Front Cover, then install Toner Cartridge. Black (BK). The toner sensor detected that no toner cartridge (Black) was set. Error code 6102 No Toner Open the Front Cover, then install Toner Cartridge. Yellow (Y). The toner sensor detected that no toner cartridge (Yellow) was set.
Page 85 ■ Electrodes location of main body Charging (Corona wire) Developer roller Grid Cleaning roller Erase lamp lens Belt transfer roller Belt cleaning roller Paper dust cleaner Waste toner cleaner shaft Waste toner cleaner roller Fig. 2-7 ■ Electrodes location of the drum unit Erase lamp lens Fig.
Page 86 ■ Error code 6300 No Waste Toner Install the Waste Toner Box. The waste toner sensor detected that no waste toner box was set. < User Check > - Re-insert the waste toner box in the correct position. Step Cause Remedy High-voltage power supply PCB Replace the high-voltage power supply...
Page 87 ■ Error code 6801 Cooling Down Wait for a while The internal temperature sensor or side thermistor of the fuser unit detected a temperature higher than the specified value. < User Check > - Decrease the room temperature. - Place the machine away from a heater. Step Cause Remedy...
Page 88 ■ Error code 6A00 Drum ! Slide the Blue tab on Drum Unit. Electric discharge that may be caused by dirt on the corona wire of the drum unit was detected. Error code 6B01 Drum Stop Replace the Drum Unit. Electric discharge was detected when the number of the drum unit rotations had become more than twice of the upper limit.
Page 89 ■ Error code 6E00 Toner Error One or more Toner Cartridges are not detected. Pull out and reinsert all 4 Toner Cartridges. The develop release sensor detected the developer roller disengagement or engagement failure. Step Cause Remedy Connection failure of the develop Reconnect the develop release sensor release sensor harness harness.
Page 90 ■ Error code 7100 Jam Rear Open the Back Cover and remove the jammed paper, then press [Start]. After the registration rear sensor detects the end of paper pass and the specified period of time has passed, the eject sensor continues to detect paper pass. <...
Page 91 ■ Error code 7200 Jam MP Tray Remove the jammed paper from MP Tray and press [Retry]. When the paper is fed from the MP tray, after the MP registration front sensor detects paper pass, the registration rear sensor does not detect paper pass after a set period of time. <...
Page 92 ■ Error code 7300 Jam Tray 1 Pull the paper tray1 completely out of the machine and remove the jammed paper. In the case of printing by feeding paper from the paper tray 1, after the T1 paper feed sensor detects paper pass, the registration front sensor does not detect paper pass after a set period of time.
Page 93 ■ Error code 7700 Jam 2-sided Pull the paper tray completely out of the machine. Check inside the machine towards the rear. Or open the Back Cover to remove the jammed paper. After the first side is printed in 2-sided printing mode, the registration front sensor does not detect paper pass after a set period of time.
Page 94 ■ Error code 8501 No Tray The paper tray cannot be detected, re-install Tray1. The T1 paper feed sensor detected that the paper tray 1 is open in 2-sided printing or printing by feeding paper from the T2 paper tray unit. (before the registration of printing in the engine) Error code 8505 No Tray The paper tray cannot be detected, re-install Tray1.
Page 95 ■ Error code 8A01 Size Error 2-sided Specify the correct paper. The registration rear sensor detected that the fed paper was larger or smaller than the specified size in 2-sided printing. Error code 8A02 2-sided Disabled Reload paper, then press Start. The registration rear sensor detected that the length of the paper is too long and it may hit within the machine in 2-sided printing.
Page 96 ■ Error code 8D02 Small paper Open the Back Cover and then press [Retry]. The paper size which is not supported by the output tray is set for printing from the printer driver. < User Check > - The size of paper actually loaded and the one specified from the driver shall be the one within the specified range.
Page 97 ■ Error code 9001 Size mismatch Reload correct paper in MP Tray, then press [Retry]. The size of paper loaded in the MP tray and the one specified from the driver are not same when paper is fed from the MP tray. Error code 9002 Size mismatch Reload correct paper in Tray1,then press [Retry].
Page 98 ■ Error code 9301 No Paper Reload paper in MP Tray. When paper was fed from the MP tray, the MP paper empty sensor detected that no paper was in the MP tray. < User Check > - Load paper to the MP tray. Step Cause Remedy...
Page 99 ■ Error code 9303 No Paper Reload paper in Tray 2. When paper was fed from the T2 paper tray unit, the T2 paper feed sensor detected that no paper was in the T2 paper tray unit. < User Check > - Load paper to the paper tray.
Page 100 ■ Error code 9307 No Paper Load paper in Tray. Upon receiving a fax or printing a list or report, the machine detected that paper tray empty of paper. < User Check > - Load paper to any tray. Step Cause Remedy MP paper empty actuator caught...
Page 101 ■ Error code 9701 Size Error 2-sided Press [OK]. Specify the correct paper and load the same size paper as the Printer driver setting. For 2-sided printing, the tray whose paper size was not supported by 2-sided printing was selected. Error code 9702 Size Error Specify the correct paper size for Tray 1.
Page 102 ■ Error code 9801 Calibration Calibration failed. Turn the power off and then back on again. Error occurred with the value measured during color density adjustment performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 103 ■ Error code 9803 Calibration Calibration failed. Press [Retry], and try again. Density patch measurement ended unsuccessfully during color density adjustment performed from the control panel. Error code 9804 Calibration Calibration failed. Press [Retry], and try again. Error occurred with the value measured during density sensor sensitivity calibration. <...
Page 104 ■ Error code 9A01 Registration Registration failed. Turn the power off and then back on again. Error occurred with the value measured during auto color registration performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 105 ■ Error code 9A03 Registration Registration failed. Press [Retry], and try again. Error occurred during patch data printing in auto color registration performed from the control panel. < User Check > - Check if the toner cartridges are set in the correct order of colors. - Replace the toner cartridge.
Page 106 ■ Error code A200 Document Jam Clear the scanner jam, then press the Stop Key. During document scanning, the first side document scanning position sensor detected that the document length was 90 cm or more. < User Check > - Use documents equal to or smaller than A4 size. - Remove the jammed paper.
Page 107 ■ Error code A400 Cover is Open Close the ADF Cover. / Close the ADF Cover, then press Stop[X]. The ADF cover sensor detected that the ADF cover was opened. < User Check > - Firmly close the ADF cover. Step Cause Remedy...
Page 108 ■ Error code A700 Print Unable A7 Turn the power off and then back on again. The ROM color parameter does not match the first side CIS or second side CIS. Error code A900 Scan Unable A9 When an image was scanned and processed, a scanning error occurred. Step Cause Remedy...
Page 109 ■ Error code AD00 Scan Unable Remove the original document. Turn the power off, then on again. First side scanned data cannot be output with the required number of pixels, and image processing cannot be completed successfully. Step Cause Remedy First side CIS unit calibration Perform “Function code...
Page 110 ■ Error code B000 SCANNER ERROR FB / SCANNER ERROR ADF The first or second side CIS flat cable was detected to be not inserted correctly. Step Cause Remedy Connection failure of the first Reconnect the first side CIS flat cable. side CIS flat cable Connection failure of the second Reconnect the second side CIS flat cable.
Page 111 ■ Error code BC00 Scan Unable BC Turn the power off and then back on again. Though a fax was scanned again after AC00 error, the second side white or black calibration data was not within the normal range. Step Cause Remedy Second side CIS unit calibration...
Page 112 ■ Error code C001 Log Access Error. Server Timeout, contact your administrator. Timeout occurred with access request sent to server due to incorrect server address, network disconnection, or inactive server. Error code C002 Log Access Error. Authentication Error, contact your administrator. User authentication is unavailable due to incorrect user name, incorrect password, or asynchronous date and time between the machine and server.
Page 113 ■ Error code C700 Out of Memory Press Stop Key The memory is insufficient to expand the data of PC-Print. Error code C800 Print Data Full Print Data is full. Press Stop[X] Key and delete the previously stored data. The memory used to store secure print data exceeded the memory size for secure print data. <...
Page 114 ■ Error code D800 Touchscreen initialization failed Remove any material which is on the touchscreen. Error occurred during touch panel initialization. Error code D900 Communication between the panel PCB and main PCB is unavailable during touch panel initialization. Error code DA00 After the initialization of the panel PCB, no response was sent from the panel PCB for a period of time.
Page 115 ■ Error code E000 Print Unable E0 Turn the power off and then back on again. Some ROM checksum error occurred. Error code E100 Print Unable E1 Turn the power off and then back on again. Program error. < User Check > - Install the latest firmware.
Page 116 ■ Error code E900 Print Unable E9 Turn the power off and then back on again. NFC PCB initialization failed. Step Cause Remedy Connection failure of the NFC Reconnect the NFC PCB flat cable. PCB flat cable Connection failure of the panel Reconnect the panel PCB harness.
Page 117: Troubleshooting For Paper Feeding Problems
Troubleshooting for Paper Feeding Problems Problems related to paper feeding are end user recoverable if following the User Check items. If the same problem occurs again, follow each procedure in the order of the number described in the Step column in the tables below. 4.2.1 No paper feeding from paper tray 1 <...
Page 118: No Paper Feeding From T2 Paper Tray Unit
4.2.2 No paper feeding from T2 paper tray unit < User Check > - Check if the paper is loaded into the paper tray correctly. - Check that too much paper is not loaded in the paper tray. - Turn back the paper loaded in the paper tray or change the orientation of the paper by 180°. - Check if the thickness of the paper is 60 to 105 g/m - Check whether the MP tray or paper tray 1 is specified for the paper feeding tray.
Page 119: No Paper Feeding From Mp Tray
4.2.3 No paper feeding from MP tray < User Check > - Check if the paper is loaded all the way into the MP tray. - Check that too much paper is not loaded in the MP tray. - Check if the machine is used with the MP tray support and MP flap are in closed state. - Check if the thickness of the paper is 60 to 163 g/m - Check whether the paper tray 1 or T2 paper tray unit is specified for the paper feeding tray.
Page 120: Multiple Sheets Of Paper Are Fed
4.2.4 Multiple sheets of paper are fed < User Check > - Check that too much paper is not loaded in any paper tray. - Check if the paper is loaded into each paper tray correctly. - Turn back the paper loaded in each paper tray or change the orientation of the paper by 180°.
Page 121: Paper Curls
4.2.7 Paper curls < User Check > - Check if the size of paper specified from the driver is matched with the one actually loaded. - Select “Reduce Paper Curl” in the driver. - Check if the paper is loaded into each paper tray correctly. - Print with the envelope lever is lowered.
Page 122: Paper Jam
4.2.9 Paper jam ■ Paper jam at the paper tray 1 < User Check > - Check if the paper is loaded into the paper tray 1 correctly. - Turn back the paper loaded in the paper tray 1 or change the orientation of the paper by 180°. - Adjust the paper guide corresponding to the paper size.
Page 123 ■ Paper jam at the T2 paper tray unit < User Check > - Check if the paper is loaded into the T2 paper tray unit correctly. - Turn back the paper loaded in the T2 paper tray unit or change the orientation of the paper by 180°.
Page 124 ■ Paper jam at the MP tray < User Check > - Check if the paper is loaded into the MP tray correctly. - Turn back the paper loaded in the MP tray or change the orientation of the paper by 180°. - Adjust the paper guide corresponding to the paper size.
Page 125 ■ Paper jam at the eject section < User Check > - Check if the paper is loaded into each paper tray correctly. - Turn back the paper loaded in each paper tray or change the orientation of the paper by 180°. - Adjust each paper guide in accordance with the paper size.
Page 126: Troubleshooting For Image Defects
Troubleshooting for Image Defects 4.3.1 Image defect examples Light on the whole One color is light (2-98) Faulty registration (2-99) Dark (2-100) page (2-97) Poor fixing (2-100) Completely blank Image distortion (2-101) All one color (2-102) (2-101) Dirt on back side of paper (2-103) Vertical streaks (2-104) Vertical streaks in a dark background (2-105) Horizontal...
Page 127: Troubleshooting Image Defect
4.3.2 Troubleshooting image defect Image defect related problems are end user recoverable if following the User Check items. If the same problem occurs again, follow each procedure in the order of the number described in the Step column in the tables below. ■...
Page 128 ■ One color is light < User Check > - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Adjust the color calibration from the control panel. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 129 ■ Electrodes location of belt unit Fig. 2-11 ■ Faulty registration < User Check > - Check whether appropriate paper type is selected on the driver. Step Cause Remedy Registration rear actuator Re-assemble the registration rear actuator. coming off Laser unit failure Replace the laser unit.
Page 130 ■ Dark < User Check > - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - After a new toner cartridge is detected, check if other toner cartridge is not inserted.
Page 131 ■ Completely blank < User Check > - Clean the corona wire of all four colors on the drum unit. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one. - Install the latest firmware. Step Cause Remedy...
Page 132 ■ All one color < User Check > - Clean the corona wire of all four colors on the drum unit. - Replace the drum unit with a new one. Step Cause Remedy Dirt on the electrodes of the Clean the electrodes of the main body and main body and the drum unit the drum unit.
Page 133 ■ Dirt on back side of paper < User Check > - This symptom might stop occurring after making several prints. - Replace the toner cartridge with a new one. - Replace the belt unit. - Replace the waste toner box. Step Cause Remedy...
Page 134 ■ Vertical streaks < User Check > - Clean the corona wire of all four colors on the drum unit. - Return the cleaning tab of the corona wire to the position. - This symptom might stop occurring after making several prints.
Page 135 ■ Vertical streaks in a dark background < User Check > - Clean the corona wire of all four colors on the drum unit. - This symptom might stop occurring after making several prints. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Leave the machine for a while as the power remains ON.
Page 136 ■ Light vertical steaks and bands on one color image < User Check > - Clean the corona wire of all four colors on the drum unit. - Check if dust adheres to the area of the toner cartridge corresponding to the location where the white vertical streak appears.
Page 137 ■ Faint print < User Check > - Check that the machine is set on a level surface. - Wipe the scanner windows of the laser unit with a soft, lint-free cloth. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 138 ■ White spots on one color image < User Check > - Check if the fuser fan and/or blower are not blocked. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Replace the drum unit with a new one.
Page 139 ■ One color spots or dirt < User Check > - Check if damp paper is used. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab. - Replace the drum unit with a new one. - Replace the toner cartridge with a new one.
Page 140 ■ One color band < User Check > - Clean the corona wire of all four colors on the drum unit. - Return the cleaning tab of the corona wire to the position. - This symptom might stop occurring after making several prints. - Refer to the User’s guide and remove the dirt on the exposure drum using a cotton swab.
Page 141 ■ Ghost < User Check > - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Check whether appropriate paper type is selected on the driver. - Select “Improve Toner Fixing Mode” in the driver. - Make a print in the color mode.
Page 142 ■ Unstable color density < User Check > - Make a print on a different type of paper. - Replace the belt unit with a new one. - Replace the waste toner box with a new one. - Replace the toner cartridge with a new one. - Replace the drum unit with a new one.
Page 143 ■ Print crease < User Check > - Check the machine’s environment. High temperature and high humidity or low temperature and low humidity conditions can cause this problem. - Change the paper to thick paper. - Check if paper is not damp. - Check if the thickness of the paper is properly set in the driver.
Page 144: Troubleshooting For Software Problems
(3)Select [USB] under the [Hardware] in [Contents] on the left side. (4)Select the machine [DCP-XXXX or MFC-XXXX] from [USB Device Tree]. (5)Check [Product ID] in [DCP-XXXX] or [MFC-XXXX]. ■ Product ID (Hexadecimal) DCP-L8400CDN: 030Fh DCP-L8450CDW: 0310h MFC-L8600CDW: 0311h MFC-L8650CDW: 0312h MFC-L8850CDW: 0313h...
Page 145: Troubleshooting For Network Problems
Troubleshooting for Network Problems 4.5.1 Cannot make a print through network connection < User Check > - Check the descriptions in the network User’s guide. - Check the network connection. - Perform network reset. (Refer to User's guide.) - Check the LAN cable. Step Cause Remedy...
Page 146: Troubleshooting For Control Panel Problems
Troubleshooting for Control Panel Problems 4.6.1 Nothing is displayed on the LCD < User Check > - Turn the power OFF/ON. Step Cause Remedy The version of the panel Install the latest panel firmware and main firmware and the main firmware.
Page 147: Unable To Perform Panel Operation
4.6.2 Unable to perform panel operation < User Check > - Turn the power OFF/ON. Step Cause Remedy The version of the panel Install the latest panel firmware and main firmware and the main firmware. firmware do not match. Deviated adjustment of touch Refer to “1.3.21 Adjustment of touch panel panel...
Page 148: The Machine Does Not Enter The Ready State When The Power Is Turned On
4.6.3 The machine does not enter the ready state when the power is turned ON DISABLE the function selection mode at startup by following the procedures below. (1) Pull out the power cord and insert it again. (2) Hold down the Home key for about 5 seconds while the machine is in the ready state. The screen shown below is displayed on the LCD.
Page 149: Troubleshooting For Toner Cartridge And Drum Unit Problems
Troubleshooting for Toner Cartridge and Drum Unit Problems 4.7.1 New toner not detected < User Check > - Check if the supplied toner cartridge is installed. - Be sure to set a new toner cartridge. - Install a genuine toner cartridge. Step Cause Remedy...
Page 150: Drum Error
4.7.4 Drum error < User Check > - Clean the corona wire. - Replace the drum unit with a new one. Step Cause Remedy Dirt on the GRID terminals or Clean the GRID terminals and CHG CHG terminals of the main terminals of the main body and the drum unit.
Page 151: Troubleshooting For Fuser Unit Problems
Troubleshooting for Fuser Unit Problems 4.8.1 Fuser unit failure Step Cause Remedy Connection failure of the Reconnect the center thermistor harness. center thermistor harness Connection failure of the side Reconnect the side thermistor harness. thermistor harness Connection failure of the Reconnect the heater harness.
Page 152: Troubleshooting For Pcb Problems
4.10 Troubleshooting for PCB Problems 4.10.1 Main PCB failure < User Check > - Turn the power OFF/ON. - Install the latest firmware. - Check if PC-print is not prohibited. - Check the print restricted ID. - Replace the damaged DIMM. - Check if print data is not damaged.
Page 153: Document Feeding Problems
4.11 Document Feeding Problems 4.11.1 No feeding < User Check > - Load the document all the way, and check that the LCD display is changed. - Check whether the number of loaded documents exceed the specified number. - Check whether the ADF cover is properly closed. Step Cause Remedy...
Page 154: Paper Jam
4.11.3 Paper jam ■ Paper jam in the ADF cover < User Check > - Check whether the document is thinner or thicker than the specifications. - Check whether the document is smaller or larger than the specifications. - Check whether the ADF cover is properly closed. - Check whether the number of loaded documents exceed the specified number.
Page 155 ■ Paper jam in the ADF < User Check > - Check whether the document is thinner or thicker than the specifications. - Check whether the document is smaller or larger than the specifications. - Check whether the document is wet or wrinkled. Step Cause Remedy...
Page 156: Document Becomes Wrinkled
■ Paper jam in the ADF eject section < User Check > - Check whether the document is thinner or thicker than the specifications. Step Cause Remedy Foreign object ADF eject Remove the foreign object. section First side document scanning Re-assemble the first side document position actuator caught on scanning position actuator.
Page 157: Scanning Image Defect Troubleshooting
4.12 Scanning Image Defect Troubleshooting 4.12.1 Image defect examples Light on the page Faulty registration (2-128) Dark (2-128) (2-126) Completely blank Vertical streaks (2-129) White vertical streaks (2-130) (2-129) Fig. 2-16 4.12.2 Troubleshooting image defect ■ Light on the page <...
Page 158 ■ Faulty registration - First side (Document scanner unit) Step Cause Remedy Fine adjustment of scan start Perform the fine adjustment of scan start position misalignment position. (Function code First side document scanning Re-assemble the first side document position actuator caught on scanning position actuator.
Page 159 ■ Completely blank < User Check > - Check if the first side and second side of the document are reversed. Step Cause Remedy White level calibration data Perform the acquisition of white level data. failure (Function code Second side CIS flat cable Replace the second side CIS flat cable.
Page 160 ■ White vertical streaks < User Check > - Clean the first side CIS glass or document glass. - Clean the second side CIS glass. Step Cause Remedy Foreign object inside the Remove the foreign object. document scanner unit Foreign object inside the Remove the foreign object.
Page 161: Troubleshooting Of Fax Functions
4.13 Troubleshooting of FAX Functions 4.13.1 FAX can't send it < User Check > - Check whether the line cord is correctly inserted into the socket. - Check whether the dialing function setting (tone/pulse) is correct. - Check whether the FAX document is correctly loaded on the ADF. Step Cause Remedy...
Page 162: Fax Cannot Be Received
4.13.2 FAX cannot be received < User Check > - Check whether the line cord is correctly inserted into the socket. - Check the reception mode settings are correct. Step Cause Remedy Connection failure of the Reconnect the modem PCB flat cable. modem PCB flat cable Disconnection of line cord Replace the line cord.
Page 163: Receive Buffer Full During Receiving Into Memory
4.13.5 Receive buffer full during receiving into memory < User Check > - Print the print data stored in the memory. - Divide the print data and print it. Step Cause Remedy Main PCB failure Replace the main PCB ASSY. 4.14 Troubleshooting for Other Problems 4.14.1 Cannot make print <...
Page 164: Cannot Update Firmware
4.14.3 Cannot update firmware < User Check > - Check if other function is being in process. - Turn the power OFF/ON. Step Cause Remedy Firmware version does not Reinstall the latest versions of all the match firmwares in the order of the sub firmware, panel firmware, main firmware, and high-voltage firmware.
Page 165: Chapter 3 Disassembly And Assembly
CHAPTER 3 DISASSEMBLY AND ASSEMBLY SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. WARNING Some parts inside the machine are extremely hot immediately after the machine is used. When opening the front cover or back cover to access any parts inside the machine, never touch the shaded parts shown in the following figures.
Page 166: Packing
L Polystyrene pad ASSY Polystyrene Polystyrene pad ASSY pad ASSY Drum Develop stopper stopper R Drum stopper L Silica gel Silica gel sheet Cleaner lock R Machine Machine Cleaner lock L Polystyrene pad ASSY Polystyrene pad ASSY Carton Brother Confidential...
Page 167: Screw Catalogue
SCREW CATALOGUE Taptite bind B Taptite flat B Taptite bind B Taptite flat B M3x8 M3x10 Taptite bind B M3x10 Taptite pan Taptite bind B Taptite pan B M4x14 M4x10 Taptite bind B M4x12 Screw pan (S/P washer) Screw pan (S/P washer) Taptite cup B M3x6 Taptite cup B...
Page 168: Screw Torque List
SCREW TORQUE LIST Note: For verifying the shape of each screw, refer to “3. SCREW CATALOGUE” in this chapter. Tightening torque Location of screw Screw type Q' ty · · m (kgf Fuser cover L Taptite bind B M4x12 0.8±0.1 (8±1) Fuser cover R Taptite bind B M4x12 0.8±0.1 (8±1)
Page 169 Tightening torque Location of screw Screw type Q' ty · · m (kgf Joint cover top Taptite bind B M4x12 0.8±0.1 (8±1) Modem FG harness Screw pan (S/P washer) M3.5x6 0.5±0.05 (5±0.5) Modem ground harness Screw pan (S/P washer) M3.5x6 0.5±0.05 (5±0.5) Modem shield cover Taptite bind B M4x12...
Page 170 Tightening torque Location of screw Screw type Q' ty · · m (kgf Registration front/ Taptite bind B M3x10 0.5±0.1 (5±1) rear sensor PCB holder MP drive frame Taptite bind B M3x10 0.5±0.1 (5±1) High-voltage power Taptite pan B M3x10 0.5±0.1 (5±1) supply PCB ASSY T2 cover rear...
Page 171: Lubrication
LUBRICATION The kind of the lubricating oil Lubrication point Quantity of lubrication (Maker name) PG661 (W) (TORAY) Joint cover base 1.0 to 1.5 mm dia. ball ASSY PG1.0 to 1.5 BDX-313 (A) (Kanto Kasei) Hinge ASSY L 2.0 mm dia. ball BDX2.0 Hinge R (thin rib) 2.0 mm dia.
Page 172 BDX3.0 Hinge R BDX3.0 BDX2.0 BDX2.0 ADF unit (thin rib) BDX2.0: BDX-313 (A) (2.0 mm dia. ball) (thick rib) BDX3.0: BDX-313 (A) (3.0 mm dia. ball) Back cover BDX2.0 BDX2.0 BDX2.0: BDX-313 (A) (2.0 mm dia. ball) Confidential...
Page 173: Overview Of Gears
OVERVIEW OF GEARS When ordering spare parts, please refer to Parts reference list. ■ Main frame L ASSY <Layout view> <Development view> <Name of gears> LY0299 Pinch roller drive gear Z21M05 LY1816 Registration gear Z26-23 LY0164 PF drive gear 21 LY0166 PP gear 14 55 LY6128...
Page 174: Harness Routing
HARNESS ROUTING Laser Unit Laser unit Front Main PCB ASSY Laser unit flat cable Wireless LAN cable rack A view Polygon motor harness (WH) “A” <A view> Main PCB ASSY “A” Hook Hook Hole Core Hook Wireless LAN cable rack Front Harness colors may be changed for any reason.
Page 175 Process Drive Unit, Front Cover Sensor, Main Drive Unit Front cover Wireless LAN sensor harness cable rack Front cover sensor (RD, WH) Main PCB Hook Hook Hook ASSY Front CN12 Develop Hook clutch harness CN16 (BK) CN18 Process drive unit CN19 CN45 PF cable rack...
Page 176 Paper Eject ASSY Paper eject origin sensor Hook Hook Hook “D” Paper eject ASSY “A” Switch back solenoid Hook “B” Main frame L ASSY “C” High-voltage main harness ASSY (WH) Front “D” Paper eject origin sensor harness (WH) Hole Hook Paper eject ASSY High-voltage power Hook...
Page 177 Back Cover Sensor ASSY Hole C Hole “A” Hook Front A view “A” Hook D Hook Back cover Hook D sensor ASSY Hook Joint cover Hole C Paper “B” base ASSY eject ASSY <A view> Front B view <B view> Front Hook Main PCB...
Page 178 Registration Mark Sensor Unit A view <A view> Front Front Registration mark sensor Hole Main PCB ASSY R PCB harness Hook (RD, WH, BL) “A” Registration mark sensor unit CN43 “A” CN44 Hole Main frame L ASSY Registration mark sensor L PCB harness (GY) Fuser Fan, Power Fan Front...
Page 179 Low-voltage Power Supply PCB Unit Front Fuser unit B view “A” Hook LVPS-heater harness ASSY Hook Guide Hook A view Hole Low-voltage power Hook supply PCB unit Core Inlet harness ASSY FG harness of the Inlet harness ASSY <A view> <B view>...
Page 180 MP Paper Empty/Registration Front Sensor PCB ASSY MP upper cover ASSY MP paper empty/ registration front sensor PCB ASSY MP paper empty/ Hook MP sensor harness registration front ASSY Hook sensor PCB ASSY (RD, WH, BL, YL) Hole Hook Front Registration/pinch roller gear bushing MP upper cover ASSY...
Page 181 Paper Feed Unit Hook Hook Hook T1 paper feed sensor PCB ASSY Registration front/ rear sensor PCB ASSY Paper feed unit Registration front/ rear sensor PCB ASSY Front T1 paper feed sensor PCB ASSY MP solenoid Hook Hole “A” “B” “C”...
Page 182 Blower, Waste Toner Sensor Front High-voltage power supply PCB ASSY Hook Blower harness (RD, WH, BL) Hook Hook Blower Waste toner sensor harness ASSY Hook (YL) Harness colors may be changed for any reason. 3-18 Confidential...
Page 183 ADF (A4 model) Front ADF cover/document detection sensor PCB ASSY Second side CIS unit Second side document scanning Front position sensor PCB ASSY Hook ADF motor Upper ADF chute harness Hole Hook Drive frame Document cover ASSY ASSY Hook “A” Hole ADF earth First side document...
Page 184 ADF (Legal model) Front ADF cover/document detection sensor PCB ASSY Second side CIS unit Second side document scanning Front position sensor PCB ASSY Hook ADF motor harness Upper ADF chute Hole Hook Drive frame Document cover ASSY ASSY Hole Hook “A”...
Page 185 Document Scanner Unit (A4 model) Double-sided Double-sided adhesive tape adhesive tape First side CIS flat cable Document scanner unit Document scanner unit First side CIS unit “A” Double-sided adhesive tape Front Hook Document scanner unit Joint cover top Document scanner “A”...
Page 186 Document Scanner Unit (Legal model) Double-sided Double-sided adhesive tape adhesive tape Document scanner unit First side CIS flat cable Document scanner unit Double-sided adhesive tape “A” First side CIS unit Front Hook Document scanner unit Hook “A” Joint cover top Hook Document scanner motor...
Page 187 Control Panel ASSY (A4 model) Control panel ASSY Document scanner unit Panel USB harness (CN20) Panel PCB harness (CN27) Core Hook Main PCB ASSY Panel FG harness (BK) Main shield cover plate ASSY Screw bind M3x8 Front Control Panel ASSY (Legal model) Control panel ASSY Document scanner unit Core...
Page 188 Modem PCB ASSY (A4 model) Front Modem ground harness (GR) Hole Modem shield cover Back cover upper Hook Flat Hook core Back cover upper Modem ground harness (GR) Hole Modem FG harness (YL) Hook Flat core Screw pan Screw pan (S/P washer) (S/P washer) M3.5x6...
Page 189 USB-Host Front Joint cover top Main USB host harness ASSY Main PCB ASSY Joint cover Hook Hook USB ASSY Hole Core Main USB host harness ASSY CN11 Hole Hook Joint cover USB ASSY Wireless LAN PCB Core Front Wireless LAN PCB Main PCB ASSY Main body Hook...
Page 190: Disassembly Flow
DISASSEMBLY FLOW Disassembly / Re-Assembly (second) 9.13 Front Cover Release Button/ Front Cover 9.1 Lift Gear 46/ Release Button 9.8 Side Cover R 9.6 Cord Hook 9.14 Support Flap Gear Z19M10 Spring 45/45 10/10 25/25 9.2 Back Cover/ Back Cover Stopper Arm L/ Back Cover 9.7 Side Cover L...
Page 191 9.21 9.20 Gear Cover ADF Cover ASSY 10/10 9.28 ADF Cover/Document Detection Sensor PCB ASSY/ 9.22 First Side Document Scanning Position Separation Roller Sensor PCB ASSY/Second Side Document Scanning Position Sensor PCB ASSY (Duplex Scanning Model Only) 60/60 9.23 ADF Separation 9.29 Document Pad Holder Feed Roller ASSY 2...
Page 192: Disassembly Procedure
DISASSEMBLY PROCEDURE ■ Preparation Prior to proceeding with the disassembly procedure, (1) Unplug - the AC cord, - the telephone line, - the USB cable, if connected, - the LAN cable, if connected, and - USB flash memory drive, if connected. (2) Remove - the Paper tray, - the Toner cartridge,...
Page 193: Lift Gear 46/Gear Z19M10
Lift Gear 46/Gear Z19M10 (1) Lift up the Plate. Release the Hook and remove the Lift gear 46 from the Plate up plate. Plate Lift gear 46 Paper tray 1 Hook Plate up plate Fig. 3-1 (2) Remove the Gear Z24M10Z14M75 from the Paper tray 1. (3) Remove the Gear Z19M10 from the Paper tray 1.
Page 194: Back Cover/Back Cover Stopper Arm L/Back Cover Stopper Arm R
Back Cover/Back Cover Stopper Arm L/ Back Cover Stopper Arm R (1) Open the Back cover. Main body Back cover <Back side> Fig. 3-3 (2) Remove the Back cover stopper arm L/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover stopper arm R Back cover...
Page 195 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 3-5 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 196 (5) Remove the Back cover stopper arm L from the Back cover. (6) Remove the Back cover stopper arm R from the Back cover. Back cover stopper arm L Back cover stopper arm R Back cover Back cover stopper arm R Back cover Center Fig.
Page 197: Fuser Cover Assy
Fuser Cover ASSY (1) Open the Back flapper holder. Release the two Pins and remove the Back flapper holder from the Main body. Main body <Back side> Back flapper holder Fig. 3-8 (2) Remove the two Taptite bind B M4x12 screws from the Fuser cover L. (3) Release the one Hook and one Pin and remove the Fuser cover L from the Main body.
Page 198 (4) Release the lock of the Fuser cover lock lever L/R to open the Fuser cover ASSY. Main body Fuser cover lock lever L Fuser cover ASSY <Back side> Fuser cover lock lever R Fig. 3-10 (5) Slide the Fuser cover ASSY in the direction of the arrow 5a and remove it to the front. Main body Fuser cover ASSY <Back side>...
Page 199: Cleaner Pinch Roller S Assy
Cleaner Pinch Roller S ASSY (1) Remove the Cleaner roller spring from the Hook of the Fuser cover ASSY. Hook Fuser cover ASSY Cleaner roller spring Cleaner pinch roller S ASSY Fig. 3-12 (2) Remove the Cleaner roller spring from the two Pins of the Fuser cover ASSY. Remove the Cleaner pinch roller S ASSY and Cleaner roller spring from the Fuser cover ASSY.
Page 200 (3) Remove the Cleaner pinch roller S ASSY from the Cleaner roller spring. Cleaner roller spring Cleaner pinch roller S ASSY Fig. 3-14 (4) Remove the other three Cleaner pinch roller S ASSYs in the same way. 3-36 Confidential...
Page 201: Fuser Unit
Fuser Unit (1) Remove the two Taptite bind B M4x12 screws from the Fuser cover R. (2) Release the two Hooks and remove the Fuser cover R from the Main body. Main body Hook Fuser cover R <Back side> Taptite bind B M4x12 Fig.
Page 202 (4) Disconnect the Electrode terminal of the Main body from the Electrode terminal of the Fuser unit. Fuser unit Electrode terminal of the Fuser unit Electrode terminal of the Main body Main body <Back side> Fig. 3-17 (5) Remove the two Taptite pan B M4x14 screws to remove the Fuser unit from the Main body. Main body Taptite pan B M4x14 Fuser unit...
Page 203 Note: - Do not apply a physical impact or vibration to the Fuser unit. - Do not touch the roller and electrodes as shown in the figure below to prevent breakage of the Fuser unit. Fuser unit Fig. 3-19 Harness routing: Refer to “...
Page 204: Cord Hook
Cord Hook (1) Rotate the Cord hook in the direction of the arrow 1a and remove it from the Main body. Main body Cord hook Cord hook Fig. 3-20 (2) Remove the other Cord hook in the same way. 3-40 Confidential...
Page 205: Side Cover L
Side Cover L (1) Open the Front cover. Main body Front cover Fig. 3-21 (2) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover L. (3) Remove the Taptite bind B M4x12 screw from the side of the Side cover L. Main body Side cover L Taptite B 3x6...
Page 206 (4) Remove the two Taptite bind B M4x12 screws from the back of the Side cover L. Side cover L Taptite bind B M4x12 <Back side> Fig. 3-23 3-42 Confidential...
Page 207 ■ A4 model (5) Release the Hooks 1 to 8 in numerical order. Move the Side cover L in the direction of the arrow 5a and release the other Hooks and remove Side cover L from the Main body. Hook Hook Hook Hook...
Page 208 ■ Legal model (5) Release the Hooks 1 to 8 in numerical order. Move the Side cover L in the direction of the arrow 5a and release the other Hooks and remove Side cover L from the Main body. Main body Hook Hook Hook 8...
Page 209: Side Cover R
Side Cover R (1) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover R. Taptite B 3x6 Side cover R <Front side> Taptite bind B M4x12 Fig. 3-28 (2) Remove the two Taptite bind B M4x12 screws from the back of the Side cover R.
Page 210 ■ A4 model (3) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 3a and release the other Hooks and remove Side cover R from the Main body. Hook Hook Main body Hook...
Page 211 ■ Legal model (3) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 3a and release the other Hooks and remove Side cover R from the Main body. Main body Hook Hook Hook 7...
Page 212 Note: As the Spacer tends to come off, be careful not to lose it. Spacer High-voltage power supply PCB ASSY Spacer Spacer Spacer <Right side> <Right side> Fig. 3-34 3-48 Confidential...
Page 213: Duplex Tray
Duplex Tray (1) Remove the two Taptite cup B M3x12 screws and remove the Duplex tray from the Main body. Taptite cup B M3x12 Main body <Back side> Duplex tray Taptite cup B M3x12 Fig. 3-35 3-49 Confidential...
Page 214: Mp Cover Assy/Mp Paper Guide Assy
9.10 MP Cover ASSY/MP Paper Guide ASSY (1) Close the Front cover. (2) Open the MP cover ASSY. Front cover MP cover ASSY Fig. 3-36 (3) Release the Pin of the MP link L from the MP cover ASSY. (4) Release the Pin of the MP link R from the MP cover ASSY. MP link R MP cover ASSY MP link L/MP link R...
Page 215 (5) Release the Pin of the MP link L from the MP paper guide ASSY. (6) Release the Pin of the MP link R from the MP paper guide ASSY. MP link R MP paper guide ASSY MP paper guide ASSY MP link L MP link L/MP link R Fig.
Page 216 (8) Release the two Pins and remove the MP cover ASSY from the Front cover. Front cover MP cover ASSY Fig. 3-40 3-52 Confidential...
Page 217: Mp Link L/Mp Link R
9.11 MP Link L/MP Link R (1) Remove the MP link L from the Front cover. (2) Remove the MP link R from the Front cover. MP link L Front cover MP link R MP link L Fig. 3-41 3-53 Confidential...
Page 218: Front Cover
9.12 Front Cover (1) Remove the Front cover damper spring from the Spring hook of the Main frame R ASSY. (2) Remove the Taptite B 3x6 screw and remove the Front cover damper spring from the Front cover. Spring hook Front cover Taptite B 3x6 Main frame R ASSY...
Page 219 (5) Release the three Bosses and remove the Front cover from the Main body. Boss Main body Front cover Boss Fig. 3-44 3-55 Confidential...
Page 220: Front Cover Release Button/Front Cover Release Button Spring
9.13 Front Cover Release Button/ Front Cover Release Button Spring (1) Release the Hook, tilt the Front cover release button in the direction of the arrow 1b, and remove it from the Boss. Assembling Note: Align the Hole of the Front cover release button to the Boss of the Front cover and insert it into the Hole.
Page 221 (3) Remove the Front cover release button spring from the Front cover. Front cover Boss Front cover release button spring Fig. 3-47 Assembling Note: When assembling the Front cover release button spring, attach “A” of the Front cover release button spring to the cutout of the Front cover release button. Front cover release button “A”...
Page 222: Support Flap
9.14 Support Flap Memo: Follow the procedure (2) only in the case of the Legal model. (1) Open the Document scanner unit. Document scanner unit Main body Fig. 3-49 (2) Release the two Pins and remove the Support flap from the Main body. Support flap Support flap Main body...
Page 223: Pull Arm L/Pull Arm R (A4 Model Only)
9.15 Pull Arm L/Pull Arm R (A4 Model Only) (1) Open the Pull arm L and Pull arm R and release the Hooks from the joint of the Document scanner unit. Hook Hook Document scanner unit Hook Pull arm R Pull arm L Fig.
Page 224: Back Cover Upper (Legal Model Only)
9.16 Back Cover Upper (Legal Model Only) (1) Remove the two Taptite bind B M4x12 screws from the Back cover upper. (2) Release the four Hooks and remove the Back cover upper from the Main body. Main body Hook Taptite bind B M4x12 Back cover upper Hook Taptite bind B M4x12...
Page 225: Adf Unit/Hinge Assy L/Hinge R/Hinge R Support
9.17 ADF Unit/Hinge ASSY L/Hinge R/Hinge R Support ■ A4 model (1) Remove the Screw bind M3x8 screw and remove the Panel FG harness from the Main shield cover plate ASSY. (2) Remove the three Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body.
Page 226 (3) Remove the two Screw bind M3x8 screws and remove the ADF earth harness and Document scanner FG harness from the Main PCB plate. (4) Disconnect the two Connectors (CN39 and CN41) from the Main PCB ASSY and release the wiring of the Main PCB insulation sheet. CN39 CN41 Main PCB insulation sheet...
Page 227 (6) Open the Document scanner unit and pull out the First side CIS flat cable and Second side CIS flat cable from the Flat core. Document scanner unit Flat core First side CIS flat cable Second side CIS flat cable Flat core Fig.
Page 228 (9) Remove the two Taptite bind B M4x12 screws from the ADF unit. ADF unit Document scanner unit Taptite bind B M4x12 Fig. 3-59 (10) Open the ADF unit. (11) Release the three Hooks and remove the Flat cable holder from the Document scanner unit. (12) Pull out the Harness of the ADF unit from the Hole of the Document scanner unit.
Page 229 Assembling Note: - When assembling the Flat cable holder, take care not to accidentally damage the Hooks, which are easily get broken. - When the ADF unit is replaced, be sure to fold and assemble the Second side CIS flat cable as shown in the figure.
Page 230 (16) Remove the Taptite cup B M3x10 screw and remove the Hinge R and Hinge R support from the ADF unit. Hinge R Hinge R support Taptite cup B M3x10 ADF unit Fig. 3-63 Harness routing: Refer to “ ADF (A4 model)”, “...
Page 231 ■ Legal model (1) Remove the Screw bind M3x8 screw and remove the Panel FG harness from the Main shield cover plate ASSY. (2) Remove the three Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body. Screw bind M3x8 (Upper side) Panel FG harness...
Page 232 (3) Remove the two Screw bind M3x8 screws and remove the ADF earth harness and Document scanner FG harness from the Main PCB plate. (4) Disconnect the two Connectors (CN39 and CN41) from the Main PCB ASSY and release the wiring of the Main PCB insulation sheet. CN39 CN41 Main PCB insulation sheet...
Page 233 (6) Release all the wiring from the Document scanner unit. (7) Release the Hook and remove the Flat core from the Joint cover top. (8) Pull out the Second side CIS flat cable from the Flat core. <A view> Flat core Document scanner unit Joint cover top Joint cover top...
Page 234 (12) Remove the eight Hooks and lift the Document scanner unit from the Main body. (13) Pull out the First side CIS flat cable from the Flat core of the Main body as lifting the Document scanner unit. Hook Hook Hook First side CIS flat cable Document...
Page 235 (15) Open the ADF unit. (16) Release the three Hooks and remove the Flat cable holder from the Document scanner unit. (17) Pull out the Harness of the ADF unit from the Hole of the Document scanner unit. (18) Remove the ADF unit from the Document scanner unit. ADF unit Document scanner unit Flat cable holder...
Page 236 (19) Turn the ADF unit upside down. (20) Remove the three Taptite cup S M3x12 screws and remove the Hinge ASSY L from the ADF unit. Taptite cup S M3x12 Hinge ASSY L Taptite cup S M3x12 ADF unit Fig. 3-73 (21) Remove the Taptite cup B M3x10 screw and remove the Hinge R and Hinge R support from the ADF unit.
Page 237: Adf Document Output Support Flap
9.18 ADF Document Output Support Flap (1) Turn the ADF unit right side up. (2) Release the two Pins and remove the ADF document output support flap from the ADF unit. ADF document output support flap ADF unit Fig. 3-75 9.19 ADF Document Support (1) Open the ADF document support.
Page 238: Adf Cover Assy
9.20 ADF Cover ASSY (1) Open the ADF cover ASSY. (2) Release the two Pins and remove the ADF cover ASSY from the ADF unit. ADF cover ASSY ADF unit Fig. 3-77 3-74 Confidential...
Page 239: Gear Cover
9.21 Gear Cover ■ A4 model (1) Release the two Hooks of the ADF unit. ADF unit Hook Hook Hook ADF unit Gear cover Gear cover Hook Fig. 3-78 ■ Legal model (1) Release the three Hooks of the ADF unit. Gear cover Hook Gear cover...
Page 240 Assembling Note: When assembling the Gear cover, take care not to accidentally damage the Hooks shown in the figure. Gear cover Hook Hook ADF unit Fig. 3-80 ■ A4 model/Legal model (2) Remove the Gear cover from the ADF unit. ADF unit Gear cover Hook...
Page 241: Separation Roller
9.22 Separation Roller (1) Rotate the Conductive bushing to release the lock. Separation roller ADF unit Conductive bushing Fig. 3-82 (2) Remove the Separation roller from the ADF unit. Note: When removing the Separation roller, be careful not to damage the Flap ADF. Flap ADF ADF unit Separation roller...
Page 242 Assembling Note: When assembling the Separation roller, be sure to assemble it in a way that the Flap ADF comes under the Document feed roller ASSY 1. Flap ADF Document feed Separation roller roller ASSY 1 Flap ADF Fig. 3-84 3-78 Confidential...
Page 243: Adf Separation Pad Holder (A4 Model Only)
9.23 ADF Separation Pad Holder (A4 Model Only) (1) Remove the two Pins and remove the ADF separation pad holder from the Upper ADF chute. ADF separation Upper ADF chute pad holder ADF separation pad holder Fig. 3-85 Note: Be careful not to lose the ADF spring. ADF Spring Upper ADF chute Fig.
Page 244 Assembling Note: There are cases where the ADF spring enters the Upper ADF chute from the mounting hole of the ADF separation pad holder. In this case, remove the Upper ADF chute from the ADF unit and take out the ADF spring. In the case that the Upper ADF chute has been removed, be sure to assemble the ADF spring and ADF separation pad holder, and then assemble the Upper ADF chute to the ADF unit.
Page 245: Adf Separation Pad/Separation Support Film (Legal Model Only)
9.24 ADF Separation Pad/ Separation Support Film (Legal Model Only) (1) Remove the Taptite cup B M3x10 screw from the Upper ADF chute. Taptite cup B M3x10 Upper ADF chute Fig. 3-88 (2) Release the two Hooks and remove the Separation rubber holder ASSY from the Upper ADF chute.
Page 246 (3) Remove the Separation support film and ADF separation pad from the Upper ADF chute. Separation support film ADF separation pad Upper ADF chute Fig. 3-90 Note: If the edge of the Separate support film protrudes from the Upper ADF chute, it causes noise.
Page 247 (4) Remove the Separate support film from the ADF separation pad. Separate support film ADF separation pad Fig. 3-92 Note: When the ADF separation pad is replaced, the Separate support film need to be replaced. 3-83 Confidential...
Page 248: Adf Separation Spring Holder (Legal Model Only)
9.25 ADF Separation Spring Holder (Legal Model Only) (1) Release the Hook of the ADF separation spring holder. Hook ADF separation spring holder Upper ADF chute Fig. 3-93 (2) Remove the two Pins and remove the ADF separation spring holder from the Upper ADF chute.
Page 249 (3) Remove the ADF spring from the Upper ADF chute. Upper ADF chute ADF spring Fig. 3-95 3-85 Confidential...
Page 250: Cis Spacer
9.26 CIS Spacer Note: Disassemble it in a place without dust. (1) Release the two Hooks and remove the CIS glass stopper from the ADF unit. Hook ADF unit CIS glass stopper Fig. 3-96 (2) Remove the CIS glass from the ADF unit. CIS glass ADF unit Fig.
Page 251 (3) Remove the CIS spacer from the both ends of the Second side CIS unit. CIS spacer Second side CIS unit CIS spacer ADF unit Fig. 3-98 3-87 Confidential...
Page 252: Second Side Cis Flat Cable/Second Side Cis Unit
9.27 Second Side CIS Flat Cable/Second Side CIS Unit (1) Lift the Second side CIS unit and release the Second side CIS flat cable. Second side CIS unit Second side CIS flat cable ADF unit Fig. 3-99 (2) Remove the two CIS springs from the ADF unit. CIS spring CIS spring ADF unit...
Page 253 (3) Remove the Second side CIS flat cable from the ADF unit. Second side CIS flat cable ADF unit Fig. 3-101 3-89 Confidential...
Page 254 Assembling Note: Since the Second side CIS flat cable might be broken when you remove it from the Flat cable holder, be sure to replace it with a new Second side CIS flat cable. When assembling a new Second side CIS flat cable, be sure to assemble it in accordance with the following procedure.
Page 255 (2) Fold the Second side CIS flat cable at the Second side CIS unit side as shown in the how-to-fold figure below. Fold down Fold the flat cable at the edge of the Supporting plate. Fold back Surface of the Supporting plate Supporting tape (Back side: Terminal surface) <To be connected to...
Page 256 (4) Pass the Second side CIS flat cable through the ADF unit. Note: Remove the Upper ADF chute from the ADF unit in advance. (Refer to “9.28 ADF Cover/Document Detection Sensor PCB ASSY/ First Side Docu- ment Scanning Position Sensor PCB ASSY/Second Side Document Scanning Position Sensor PCB ASSY (Duplex Scanning Model Only)”...
Page 257 (6) Align the Second side CIS flat cable to the angle of the Rib of the Flat cable holder and pass it through the Flat cable holder as shown in the figure below, and then affix it to the double-sided adhesive tape affixed to the Flat cable holder. Rib (Align the folded area to this part.) Flat cable holder Pass the harness through here.
Page 258 (7) Fold the Second side CIS flat cable at the Main PCB ASSY side as shown in the how-to- fold figure below. ■ A4 model Fold down Fold back Second side CIS flat cable Surface of the Supporting plate (Back side: Terminal surface) <To be connected to Main PCB>...
Page 259: Adf Cover/Document Detection Sensor Pcb Assy/ First Side Document Scanning Position Sensor Pcb Assy/ Second Side Document Scanning Position Sensor Pcb Assy (Duplex Scanning Model Only)
9.28 ADF Cover/Document Detection Sensor PCB ASSY/ First Side Document Scanning Position Sensor PCB ASSY/ Second Side Document Scanning Position Sensor PCB ASSY (Duplex Scanning Model Only) (1) Rotate the Conductive bushing to release the lock. ADF unit Document feed roller ASSY 1 Conductive bushing Fig.
Page 260 (3) Turn the ADF unit upside down. (4) Remove the Taptite cup B M3x10 screw from the ADF unit. Taptite cup B M3x10 ADF unit Fig. 3-113 (5) Turn the ADF unit right side up. (6) Remove the five Taptite cup B M3x10 screws from the Upper ADF chute. (7) Remove the Upper ADF chute from the ADF unit.
Page 261 Assembling Note: When you replace this part without disassembling the Second side CIS unit, follow the instructions given below: - Shift the Upper ADF chute to the position shown in the figure so that it will not interfere with the work. - Be careful not to damage the Flat cable.
Page 262 (10) Disconnect the Connector from the ADF cover/document detection sensor PCB ASSY. Connector ADF cover/document detection sensor PCB ASSY Fig. 3-117 (11) Lift the film. (Only when the Film is inserted) (12) Push and open the Rib and remove the Second side document scanning position sensor PCB ASSY from the Lower ADF chute.
Page 263 (13) Disconnect the Connector from the Second side document scanning position sensor PCB ASSY. Connector Second side document scanning position sensor PCB ASSY Fig. 3-119 (14) Remove the First side document scanning position sensor PCB ASSY in the same way. 3-99 Confidential...
Page 264: Document Feed Roller Assy 2
9.29 Document Feed Roller ASSY 2 (1) Remove the three Taptite cup B M3x10 screws from the Lower ADF chute. (2) Release all the wiring from the Document cover. (3) Release the Hook and remove the Lower ADF chute from the Document cover. Taptite cup B M3x10 Lower ADF chute Document cover...
Page 265 (5) Remove the Document feed roller ASSY 2 from the Lower ADF chute. Document feed roller ASSY 2 Lower ADF chute Fig. 3-122 3-101 Confidential...
Page 266: Eject Film
9.30 Eject Film (1) Release the two Hooks and remove the Document ejection roller bushing from the Document ejection roller. Document ejection roller bushing Lower ADF chute Document ejection roller Hook Fig. 3-123 (2) Rotate the Conductive bushing to release the lock. Conductive bushing Conductive bushing Lower ADF chute...
Page 267 (3) Remove the Document ejection roller from the Lower ADF chute. Lower ADF chute Document ejection roller Fig. 3-125 (4) Peel off the double-sided adhesive tape and remove the Eject film from the Lower ADF chute. ■ ■ A4 model Legal model Lower ADF chute Lower ADF chute...
Page 268: Adf Motor
9.31 ADF Motor (1) Remove the Taptite cup S M3x8 SR screw and remove the ADF FG harness. Taptite cup S M3x8 SR ADF FG harness Lower ADF chute Fig. 3-128 (2) Remove the three Taptite cup B M3x10 screws and remove the Drive frame ASSY from the Lower ADF chute.
Page 269 Assembling Note: When assembling the Drive frame ASSY, ensure that the Arm ASSY L2 are placed in the positions as shown in the figure below. Drive frame ASSY Arm ASSY L2 Fig. 3-130 (3) Disconnect the Connector from the ADF motor. Drive frame ASSY ADF motor Connector...
Page 270 (4) Release the Hook and remove the Gear43 from the Drive frame ASSY. Hook Drive frame ASSY Gear43 Fig. 3-132 (5) Remove the Screw pan (S/P washer) M3x6 screw and remove the ADF motor from the Drive frame ASSY. ADF motor Screw pan (S/P washer) M3x6 Drive frame ASSY ADF motor...
Page 271: Document Cover Assy
9.32 Document Cover ASSY (1) Remove the three Document feed pinch roller spring shafts and three Document feed pinch rollers from the Document cover ASSY. Document feed pinch roller spring shaft Document feed pinch roller Document feed pinch roller Document feed pinch roller spring shaft Document feed pinch roller Document feed pinch...
Page 272: Control Panel Assy/Document Scanner Unit
9.33 Control Panel ASSY/Document Scanner Unit ■ A4 model (1) Remove the four Taptite cup B M3x10 screws from the Control panel ASSY. Taptite cup B M3x10 Taptite cup B M3x10 Control panel ASSY Fig. 3-135 (2) Release the four Hooks 1. Move the Control panel ASSY in the direction of the arrow and release the other four Hooks.
Page 273 ■ Legal model (1) Remove the two Taptite bind B M4x12 screws from the Control panel ASSY. (2) Release the two Hooks at both sides of the Control panel ASSY. Document scanner unit Taptite bind B M4x12 Hook Control panel ASSY Hook Taptite bind B M4x12 Fig.
Page 274: Panel Pcb Unit
9.34 Panel PCB Unit (1) Disconnect the Flat cable (CN4) of the Panel PCB unit and release the wiring. Flat cable Control panel ASSY Panel PCB unit Fig. 3-139 ■ A4 model (2) Remove the three Taptite cup B M3x10 screws from the LCD hold plate. (3) Release the four Hooks and remove the LCD hold plate from the Control panel ASSY.
Page 275 ■ Legal model (2) Remove the three Taptite cup B M3x10 screws from the LCD hold plate. (3) Release the six Hooks and remove the LCD hold plate from the Control panel ASSY. Taptite cup B M3x10 LCD hold plate Hook Control panel ASSY Hook...
Page 276 (4) Remove the four Taptite cup B M3x10 screws and remove the Panel control PCB shield plate cover from the Control panel ASSY. Taptite cup B M3x10 Panel control PCB shield plate cover Control panel ASSY Fig. 3-143 (5) Release the Lock and disconnect the Flat cable (CN1) of the Panel PCB unit. (6) Disconnect the Flat cable (CN2) from the Panel PCB unit.
Page 277: Lcd
9.35 LCD (1) Remove the LCD from the Control panel ASSY. Control panel ASSY Fig. 3-145 3-113 Confidential...
Page 278: Touch Panel Assy
9.36 Touch Panel ASSY (1) Disconnect the Flat cable (CN1) of the Touch panel ASSY. (2) Remove the Touch panel ASSY from the Key PCB ASSY. Flat cable Touch panel ASSY Key PCB ASSY Fig. 3-146 Assembling Note: When assembling the Touch panel ASSY, be sure to assemble “A” of the Touch panel ASSY as shown in the figure below.
Page 279: Nfc Pcb Assy (Model With Nfc Only)/Panel Cover Assy
9.37 NFC PCB ASSY (Model with NFC only)/Panel Cover ASSY (1) Remove the PCB insulation sheet from the Shield plate base. (2) Remove the Shield plate base from the Panel cover ASSY. PCB insulation sheet Shield plate base Panel cover ASSY Fig.
Page 280: First Side Cis Unit/First Side Cis Flat Cable
9.38 First Side CIS Unit/First Side CIS Flat Cable (1) Remove the six Taptite bind B M4x12 screws to remove the Document scanner top cover ASSY from the Document scanner unit. Taptite bind B M4x12 Document scanner top cover ASSY Taptite bind B M4x12 Taptite bind B M4x12 Document scanner unit...
Page 281 (3) Remove the First side CIS unit from the CIS drive belt. First side CIS unit Guide shaft CIS drive belt First side CIS unit CIS drive belt Guide shaft Fig. 3-153 (4) Peel off the Double-sided adhesive tape from the First side CIS flat cable. First side CIS unit Double-sided adhesive tape First side CIS flat cable...
Page 282 (5) Open the First side CIS unit. Remove the First side CIS flat cable from the Connector (CN1) of the First side CIS unit. First side CIS unit First side CIS flat cable Fig. 3-155 (6) Remove the two Pins to remove the First side CIS unit from the CIS Carriage. First side CIS unit CIS Carriage Fig.
Page 283 (7) Peel off the Double-sided adhesive tapes at three locations. First side CIS flat cable Flat core Double-sided adhesive tape Double-sided adhesive tape Document scanner bottom cover ASSY Double-sided adhesive tape Fig. 3-157 (8) Pull out the First side CIS flat cable from the Hole of the Document scanner bottom cover ASSY.
Page 284 Assembling Note: When the Document scanner unit are replaced, be sure to fold and assemble the First side CIS flat cable as shown in the figure. ■ A4 model 0 to 3 40 mm Fold down 20 mm Affix the tape on the Fold back back side (terminal side).
Page 285: Joint Film (A4 Model Only)
9.39 Joint Film (A4 Model Only) (1) Peel off the Double-sided adhesive tape and remove the Joint film from the Joint cover top. Assembling Note: When affixing the Joint film, be sure to affix it to the Joint cover top as shown in the figure below.
Page 286: Joint Film2 (Single-Side Scanning Model Only)
9.40 Joint Film2 (Single-side Scanning Model Only) (1) Peel off the double-sided adhesive tape and remove the Joint film2 from the Joint cover top. Joint film2 Joint cover top Fig. 3-162 3-122 Confidential...
Page 287: Joint Cover Top
9.41 Joint Cover Top ■ A4 model (1) Remove the Lock claw and remove the Pull arm guide from the Joint cover top. Pull arm guide Lock claw Lock claw Pull arm guide Joint cover top Fig. 3-163 (2) Remove the eight Taptite bind B M4x12 screws from the Joint cover top. Taptite bind B M4x12 Taptite bind B M4x12 Taptite bind B M4x12...
Page 288 (3) Release the eight Hooks and remove the Joint cover top from the Main body. Hook Joint cover top Hook Hook Hook Main body Hook Fig. 3-165 ■ Legal model (1) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem FG harness from the Main PCB plate.
Page 289 (3) Remove the eight Taptite bind B M4x12 screws from the Joint cover top. Taptite bind B M4x12 Taptite bind B M4x12 Taptite bind B M4x12 Joint cover top Taptite bind B M4x12 <Front side> Fig. 3-167 (4) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem ground harness from the High-voltage power supply PCB ASSY.
Page 290 (5) Release the two Hooks A and release the two Hooks B. (6) Release the four Hooks C and lift the Joint cover top in the direction of the arrow. (7) Slide the Joint cover top from the four Hooks D and remove it from the Main body. Hook C Hook D Joint cover top...
Page 291 (9) Remove the two Taptite bind B M4x12 screws and remove the Modem shield cover from the Joint cover top. Taptite bind B M4x12 Modem shield cover Joint cover top Fig. 3-171 Harness routing: Refer to “ Modem PCB ASSY (Legal model)” 3-127 Confidential...
Page 292: Modem Pcb Assy/Modem Flat Cable
9.42 Modem PCB ASSY/Modem Flat Cable Memo: Follow the procedures (8) to (11) in the case of the Legal model. ■ A4 model (1) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem FG harness. (2) Disconnect the Modem flat cable (CN28) from the Main PCB ASSY. CN28 Modem FG harness Modem flat cable...
Page 293 (3) Release the wiring of the FG harness from the Back cover upper. (4) Release the Hook and remove the two Flat cores of the Modem flat cable from the Back cover upper. Modem flat cable Flat core Back cover upper Hook Fig.
Page 294 (7) Remove the two Taptite bind B M4x12 screws and remove the Modem shield cover from the Back cover upper. Taptite bind B M4x12 Modem shield cover Back cover upper Fig. 3-175 ■ A4 model/Legal model (8) Disconnect the Modem flat cable (CN1) from the Modem PCB ASSY. (9) Remove the Flat core from the Modem flat cable.
Page 295 Note: - After disconnecting flat cables, check that each cable is not damaged at its end or short-circuited. - When connecting flat cables, do not insert them at an angle. After insertion, check that the cables are not at an angle. <How to fold the Modem flat cable>...
Page 296 (10) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem shield cover from the Modem shield plate. Screw pan (S/P washer) M3.5x6 Modem shield cover Modem shield plate Fig. 3-179 (11) Remove the two Taptite cup S M3x6 SR screws and remove the Modem PCB ASSY from the Modem shield plate.
Page 297: Back Cover Upper (A4 Model Only)
9.43 Back Cover Upper (A4 Model Only) (1) Remove the four Taptite bind B M4x12 screws from the Back cover upper. (2) Release the two Hooks and remove the Back cover upper from the Main body. Taptite bind B M4x12 Taptite bind B M4x12 Hook Back cover upper...
Page 298 9.44 Joint Cover USB ASSY (1) Disconnect the Connector (CN11) from the Main PCB ASSY. CN33 CN28 CN20 CN38 CN37 CN27 CN32 CN41 Main PCB ASSY CN39 CN49 CN21 CN10 CN12 CN11 CN42 CN43 CN22 CN13 CN44 CN14 CN46 CN15 CN47 CN16 CN26...
Page 299 (4) Release the four Hooks to remove the Joint cover USB ASSY from the Main body. Joint cover USB ASSY Joint cover USB ASSY Hook Hook Main body Fig. 3-184 Harness routing: Refer to “ USB-Host” 3-135 Confidential...
Page 300: Wireless Lan Pcb
9.45 Wireless LAN PCB (1) Release the three Hooks and remove the Wireless LAN PCB from the Main body. Wireless LAN PCB Hook Hook Main body Hook Fig. 3-185 (2) Disconnect the Main Wireless LAN harness ASSY from the Wireless LAN PCB. Main Wireless LAN harness ASSY Wireless LAN PCB Fig.
Page 301: Main Pcb Assy
9.46 Main PCB ASSY Note: Backup of machine information Before starting disassembly work, back up the machine information and user setting information. (Refer to “1.3.13 Backup of machine information (Function code 41)” in Chapter After replacing the PCB, restore the backup data to a new PCB. (1) Disconnect the twenty five Connectors (CN2, CN3, CN4, CN5, CN6, CN8, CN9, CN10, CN12, CN13, CN14, CN15, CN16, CN17, CN18, CN19, CN21, CN30, CN40, CN42, CN43, CN44, CN46, CN47 and CN49) and three Flat cables (CN7, CN31 and CN45) from...
Page 302 (2) Remove the three Screw bind M3x6 screws and remove the Main PCB ASSY from the Main body. Main body Screw bind M3x6 (Upper side) Main PCB ASSY (Middle side) Screw bind M3x6 (Lower side) Fig. 3-188 Note: Note that the tightening torque is different between the upper/middle side and lower side of the Screw bind M3x6.
Page 303: Laser Unit Flat Cable/Laser Unit
9.47 Laser Unit Flat Cable/Laser Unit (1) Remove the seven Taptite bind B M4x12 screws from the Joint cover base ASSY. (2) Remove the two Taptite bind B M4x12 screws from the back of the Joint cover base ASSY. Taptite bind B M4x12 Taptite bind B M4x12 Taptite bind B M4x12...
Page 304 (4) Remove the six Taptite bind B M4x12 screws and four Taptite cup S M3x6 SR screws, and remove the Scanner cover plate from the Main body. Assembling Note: When assembling the six screws of the Taptite bind B M4x12, be sure to assemble them in the order shown in the figure.
Page 305 Note: - After disconnecting flat cables, check that each cable is not damaged at its end or short-circuited. - When connecting flat cables, do not insert them at an angle. After insertion, check that the cables are not at an angle. <How to fold the Laser unit flat cable>...
Page 306 (6) Remove the five Taptite cup S M3x6 SR screws and remove the four Scanner holders from the Scanner plate. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder Scanner holder Scanner plate...
Page 307: Front Cover Sensor
(7) Disconnect the Connector (CN8). (8) Remove the Laser unit from the Scanner plate. Laser unit Scanner plate <Front side> Fig. 3-196 Harness routing: Refer to “ Laser Unit” 9.48 Front Cover Sensor (1) Release the wiring of the Front cover sensor. (2) Release the two Hooks and remove the Front cover sensor from the Main body.
Page 308: Process Drive Unit/Fuser Drive Gear Z25
9.49 Process Drive Unit/Fuser Drive Gear Z25 (1) Release all the wiring from the Wireless LAN cable rack. (2) Release the three Hooks and remove the Wireless LAN cable rack from the Main body. Hook Main body Wireless LAN cable rack <Left side>...
Page 309 (5) Remove the two Screw bind M3x8 screws from the Main PCB plate. Release the two Hooks and remove the Main PCB plate from the Main body. Hook Main PCB insulation sheet Main body Main PCB plate Screw bind M3x8 <Left side>...
Page 310 (8) Remove the Mono color cam from the Main body. Mono color cam <Front side> Main body Fig. 3-202 Assembling Note: When assembling the Mono color cam, be sure to check that the Forced develop release link is at “A” position. If you attach the Mono color cam as the Forced develop release link is at “B”...
Page 311 (9) Release all the wiring from the Cable rack. (10) Release the six Hooks and slide the Cable rack in the direction of the arrow and remove it from the Main body. Process drive unit Hook Hook Hook Cable rack Hook Hook <Left side>...
Page 312 (12) Remove the five Taptite bind B M4x12 screws, one Taptite pan (washer) B M4x12 DA screw, and the one Screw pan (S/P washer) M3.5x6 screw from the Process drive unit. Release the two Hooks and remove the Process drive unit from the Main body. Main body Hook Screw pan (S/P washer) M3.5x6...
Page 313 (13) Release the Hook and remove the Fuser drive gear Z25 from the Process drive unit. Hook Fuser Drive Gear Z25 Process drive unit Fig. 3-207 Harness routing: Refer to “ Laser Unit”, “ Process Drive Unit, Front Cover Sensor, Main Drive Unit”, “...
Page 314: Main Drive Unit
9.50 Main Drive Unit (1) Release all the wiring from the Main drive unit. (2) Remove the four Taptite bind B M4x12 screws from the Main drive unit. Release the Hook and remove the Main drive unit from the Main body. Hook Main drive unit Taptite...
Page 315: Develop Release Drive Unit
9.51 Develop Release Drive Unit (1) Release the wiring of the Develop release drive unit. (2) Remove the three Taptite bind B M4x12 screws from the Develop release drive unit. Release the three Hooks and remove the Develop release drive unit from the Main body. Hook Hook Develop release drive unit...
Page 316: Develop Release Sensor Pcb Assy
9.52 Develop Release Sensor PCB ASSY (1) Release the Hook and remove the Develop release sensor PCB ASSY from the Main body. Main body Hook Develop release sensor PCB ASSY <Left side> Fig. 3-211 3-152 Confidential...
Page 317: Toner/New Sensor Pcb Assy
9.53 Toner/New Sensor PCB ASSY (1) Release the two Hooks and remove the Forced develop release link from the Main body. Hook Forced develop release link Hook Forced develop release link Forced develop release link <Left side> Main body Fig. 3-212 (2) Release the six Hooks and remove the Toner/new sensor PCB ASSY from the Main body.
Page 318: Fuser Fan
9.54 Fuser Fan (1) Disconnect the Connector (CN4) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY <Right side> Fuser fan Fig. 3-214 (2) Slightly rotate the Fuser fan in the direction of the arrow 2a and pull it out from the Main body.
Page 319: Paper Eject Assy
9.55 Paper Eject ASSY (1) Disconnect the two Connectors (CN1 and CN2) from the High-voltage power supply PCB ASSY. (2) Release the wiring of the High-voltage main harness ASSY. High-voltage power supply PCB ASSY Paper eject ASSY <Right side> Fig. 3-216 (3) Remove the four Taptite bind B M4x12 screws and remove the Paper eject ASSY from the Main body.
Page 320: Toner Filter Assy
9.56 Toner Filter ASSY (1) Release the five Hooks and remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY Hook Toner filter ASSY Hook Hook Fig. 3-218 3-156 Confidential...
Page 321 9.57 Paper Eject Origin Sensor (1) Remove the Eject ground wire 1 from the Paper eject ASSY. Paper eject ASSY Eject ground wire 1 Fig. 3-219 (2) Release the five Hooks and remove the Eject ground wire 2 from the Paper eject ASSY. Paper eject ASSY <A view>...
Page 322: Paper Eject Origin Sensor
Assembling Note: After assembling the Eject ground wire 1 and Eject ground wire 2, check the conduction between the Middle roller shaft and the Cooling roller shaft. Middle roller ASSY Cooling roller shaft Middle roller shaft Eject cooling roller ASSY Paper eject ASSY Fig.
Page 323: Back Cover Sensor Assy
9.58 Back Cover Sensor ASSY (1) Release the wiring of the Back cover sensor ASSY. (2) Release the two Hooks and remove the Back cover sensor ASSY from the Main body. Back cover sensor ASSY Hook Hook Back cover sensor ASSY Hook Hook Main body...
Page 324: Eject Sensor Pcb Assy
9.59 Eject Sensor PCB ASSY (1) Release the wiring of the Eject sensor PCB ASSY. (2) Release the Hook and remove the Eject sensor PCB ASSY from the Main body. Hook Eject sensor PCB ASSY A view <A view> Hook <Back side>...
Page 325: Registration Mark Sensor Unit
9.60 Registration Mark Sensor Unit (1) Release the wiring of the Registration mark sensor unit. (2) Remove the two Taptite bind B M3x10 screws from the Registration mark sensor unit. Release the two Bosses and remove the Registration mark sensor unit from the Main body. Boss Boss Main body...
Page 326: Power Fan
9.61 Power Fan (1) Disconnect the Connector (CN5) from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY <Back side> Power fan Fig. 3-227 (2) Slightly rotate the Power fan in the direction of the arrow 2a and pull it out from the Main body.
Page 327: Low-Voltage Power Supply Pcb Unit
9.62 Low-voltage Power Supply PCB Unit (1) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the FG harness of the Inlet harness ASSY from the LVPS plate. (2) Remove the Taptite flat B M3x10 screw and remove the Inlet harness ASSY from the Main body.
Page 328 (5) Remove the Screw pan (S/P washer) M3.5x6 screw from the Drive ground plate. (6) Release the Boss and remove the Drive ground plate from the Low-voltage power supply PCB unit. (7) Release the wiring of the LVPS-main harness ASSY. Drive ground plate <Back side>...
Page 329 (9) Disconnect the Connector (CN101) of the LVPS-main harness ASSY from the Low-voltage power supply PCB unit. Connector of the LVPS-main harness ASSY CN101 Low-voltage power supply PCB unit Fig. 3-232 (10) Remove the five Taptite cup S M3x6 SR screws and remove the Low-voltage power supply PCB unit from the LVPS plate.
Page 330: Mp Paper Empty Actuator A Assy/Mp Paper Empty Actuator B
9.63 MP Paper Empty Actuator A ASSY/ MP Paper Empty Actuator B (1) Press “A” to release the Hook and remove the MP upper frame cover from the MP upper cover ASSY. “A” MP upper frame cover Hook <Front side> MP upper cover ASSY Fig.
Page 331 (3) Release the Hook 1 and rotate the MP holder bushing in the direction of the arrow. (4) Release the Hook 2 and remove the MP holder bushing from the MP upper cover ASSY. Hook 1 Hook 2 MP holder bushing Hook 1 Hook 2 <Front side>...
Page 332 (6) Remove the Registration gear Z26-23 from the Registration/pinch roller gear bushing. Registration/pinch roller gear bushing <Left side> Registration gear Z26-23 Fig. 3-238 (7) Remove the Pinch roller drive gear Z21M05 from the Registration/pinch roller gear bushing. Registration/pinch roller gear bushing Pinch roller drive gear Z21M05 <Left side>...
Page 333 (8) Release the Hook and remove the Registration/pinch roller gear bushing from the Main body. (9) Release the wiring of the Registration/pinch roller gear bushing. Main body Hook Registration/pinch roller gear bushing <Left side> Fig. 3-240 (10) Slide the MP drive shaft as shown in the figure. (11) Remove the two Taptite bind B M3x10 screws from the MP upper cover ASSY.
Page 334 Assembling Note: When assembling the MP upper cover ASSY, attach “A” of the MP lift arm A to the MP lift lever. MP lift lever MP upper cover ASSY MP lift arm A “A” Fig. 3-242 (12) Release the five Hooks and remove the Sensor cover MP from the MP upper cover ASSY. MP upper cover ASSY Hook Hook...
Page 335 (13) Release the two Hooks and remove the MP paper empty actuator A ASSY from the MP upper cover ASSY. MP paper empty actuator B MP paper empty actuator A ASSY MP paper empty actuator A ASSY MP paper empty actuator B Hook MP upper cover ASSY...
Page 336: Mp Paper Empty/Registration Front Sensor Pcb Assy
9.64 MP Paper Empty/Registration Front Sensor PCB ASSY (1) Release the Hook and remove the MP separation roller bushing from the MP drive shaft. MP drive shaft MP separation roller bushing Hook Fig. 3-246 (2) Release the two Hooks and remove the MP registration front actuator spring from the MP registration front actuator.
Page 337 (3) Pull out the MP drive shaft and remove the MP registration front actuator from the MP upper cover ASSY. MP registration front actuator MP drive shaft MP upper cover ASSY Fig. 3-248 (4) Release the wiring of the MP paper empty/registration front sensor PCB ASSY. (5) Remove the Taptite bind B M3x8 screw and remove the MP paper empty/registration front sensor PCB ASSY from the MP upper cover ASSY.
Page 338: Paper Feed Unit/Joint Pin
9.65 Paper Feed Unit/Joint Pin (1) Push the T1 lift arm to the back and remove “B” of the Roller holder ASSY from “A” of the T1 lift arm. Roller holder ASSY T1 lift arm <Front side> “B” “A” Fig. 3-250 (2) Slide the Roller holder ASSY in the direction of the arrow and remove it from the T1 drive shaft gear Z17M07.
Page 339 Assembling Note: Align the Hole of the Paper feed unit to the Shaft of the Roller holder ASSY and insert it into the Hole. Paper feed unit Paper feed unit Roller holder ASSY Shaft Hole Fig. 3-252 (4) Move the T1 lift arm in the direction of the arrow 4b as bending it in the direction of the arrow 4a and remove it from the Boss of the Paper feed unit.
Page 340 (5) Remove the PF drive gear 21 and PF drive joint from the Main body. Main body PF drive joint <Left side> PF drive gear 21 Fig. 3-254 (6) Remove the Taptite cup B M3x12 screw from the Paper feed unit. (7) Remove the two Taptite bind B M4x12 screws, then shift the Paper feed unit to the right, and remove it from the Main body.
Page 341 (8) Remove the Registration roller drive joint from the PF registration roller shaft. (9) Remove the Joint pin from the PF registration roller shaft. Joint pin Paper feed unit PF registration roller shaft PF registration roller shaft A view <A view> Registration roller drive joint Joint pin...
Page 342: Registration Front/Rear Sensor Pcb Assy
9.66 Registration Front/Rear Sensor PCB ASSY (1) Release the wiring of the Registration front/rear sensor PCB ASSY. (2) Remove the Taptite bind B M3x10 screw and remove the Registration front/rear sensor PCB holder from the Paper feed unit. Taptite bind B M3x10 Registration front/rear sensor PCB holder Paper feed unit...
Page 343: T1 Paper Feed Sensor Pcb Assy
9.67 T1 Paper Feed Sensor PCB ASSY (1) Release all the wiring from the MP drive frame. (2) Remove the three Taptite bind B M3x10 screws and remove the MP drive frame from the Paper feed unit. MP drive frame Taptite bind B M3x10 Paper feed unit Taptite bind B M3x10...
Page 344 (3) Release the Hook and remove the Separation roller bushing from the T1 drive shaft gear Z17M07. Paper feed unit T1 drive shaft gear Z17M07 Hook MP separation roller bushing Fig. 3-261 (4) Remove the Edge actuator spring from the Hook of the Paper feed unit and the Hook of the Edge actuator.
Page 345 (5) Pull out the T1 drive shaft gear Z17M07 from the Paper feed unit and remove the Edge actuator. Edge actuator T1 drive shaft gear Z17M07 Paper feed unit Fig. 3-263 (6) Release the wiring of the T1 paper feed sensor PCB ASSY. (7) Release the three Hooks and remove the T1 paper feed sensor PCB ASSY from the Paper feed unit.
Page 346: High-Voltage Power Supply Pcb Assy
9.68 High-voltage Power Supply PCB ASSY (1) Remove the four Spacers from the Main frame R ASSY. High-voltage power supply PCB ASSY Main frame R ASSY Spacer Spacer <Right side> Fig. 3-265 (2) Disconnect the two Connectors (CN6 and CN7) from the High-voltage power supply PCB ASSY.
Page 347 (3) Remove the Taptite pan B M3x10 screw from the High-voltage power supply PCB ASSY. Release the eight Hooks and remove the High-voltage power supply PCB ASSY from the Main body. Hook Hook Taptite pan B M3x10 Main body Hook A view High-voltage power supply PCB ASSY <Right side>...
Page 348 (4) Release the Hook and remove the HVPS shield ASSY from the High-voltage power supply PCB ASSY. High-voltage power supply PCB ASSY Hook HVPS shield ASSY Fig. 3-268 Assembling Note: After assembling the High-voltage power supply PCB ASSY, check that the Electrode inside the machine does not fall and that you do not feel that the Electrode gets caught when you press it.
Page 349: Air Duct Film
9.69 Air Duct Film (1) Remove the Air duct film from the Main frame R ASSY by peeling off the Double-sided adhesive tape. Note: - As the Air duct protector tends to come off, be careful not to lose it. - When removing the Air duct film, replace the Air duct film with a new one.
Page 350: Blower
9.70 Blower (1) Release the wiring of the Blower. (2) Remove the Blower from the Main frame R ASSY. Main frame R ASSY Label <Right side> Blower Fig. 3-271 Assembling Note: When assembling the Blower, be sure to assemble it in a way that the label side faces out. Harness routing: Refer to “...
Page 351: Disassembly Procedure (Lt-320Cl/Lt-325Cl)
10. DISASSEMBLY PROCEDURE (LT-320CL/LT-325CL) 10.1 T2 Paper Tray Unit (1) Take out the T2 paper tray unit from the Main body. T2 paper tray unit Main body Fig. 3-272 3-187 Confidential...
Page 352: T2 Cover Rear
10.2 T2 Cover Rear (1) Remove the two Taptite cup S M3x10 SR screws from the T2 cover rear. Taptite cup S M3x10 SR T2 cover rear Taptite cup S M3x10 SR <Back side> Fig. 3-273 (2) Release the two Pins and remove the T2 cover rear from the Main body. T2 cover rear <Back side>...
Page 353: T2 Cover Left
10.3 T2 Cover Left (1) Remove the two Taptite cup S M3x6 SR screws from the T2 cover left. T2 cover left <Front side> Taptite cup S M3x6 SR Taptite cup S M3x6 SR Fig. 3-275 (2) Release the one Pin and release the two Hooks at the top. (3) Release the two Hooks at the bottom and remove the T2 cover left from the T2 frame L unit.
Page 354: T2 Cover Right
10.4 T2 Cover Right (1) Remove the two Taptite cup S M3x6 SR screws from the T2 cover right. T2 cover right Taptite cup S M3x6 SR <Right side> Taptite cup S M3x6 SR Fig. 3-277 (2) Release the one Pin and release the two Hooks at the top. (3) Release the three Hooks at the bottom and remove the T2 cover right from the Main body.
Page 355: T2 Relay Pcb Assy
10.5 T2 Relay PCB ASSY (1) Disconnect all the Connectors from the T2 relay PCB ASSY. (Not used) (T2 paper edge sensor) (T2 plate-up detection sensor) (T2 connector) T2 relay PCB ASSY (T2 solenoid) (T2 plate-up motor) Fig. 3-279 (2) Remove the Taptite cup S M3x6 SR screw and remove the T2 relay PCB ASSY from the T2 frame L unit.
Page 356: T2 Paper Feed Frame Unit/T2 Edge Actuator
10.6 T2 Paper Feed Frame Unit/T2 Edge Actuator (1) Remove the Clutch spring from the Clutch arm ASSY. Clutch arm ASSY Clutch spring <Left side> Clutch arm ASSY Fig. 3-281 (2) Release the Hook and remove the Gear 45/40 from the T2 frame L unit. Gear 45/40 T2 frame L unit <Left side>...
Page 357 (3) Remove the Collar 6 from the Clutch arm ASSY. Collar 6 Clutch arm ASSY <Left side> Fig. 3-283 (4) Remove the Clutch arm ASSY from the T2 frame L unit. T2 frame L unit Clutch arm ASSY <Left side> Fig.
Page 358 (5) Remove the five Taptite cup S M3x6 SR screws and remove the T2 beam F ASSY from the Main body. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Taptite cup S M3x6 SR T2 beam F ASSY <Front side>...
Page 359 (7) Remove the Retaining ring E3 from the Feed roller and remove the Feed roller bushing TR. Feed roller Feed roller bushing TR Retaining ring E3 <Right side> Fig. 3-287 (8) Remove the Lift spring from the Hook of the Lift lever A. (9) Remove the Feed roller from the Main body in the directions of the arrows 9a, 9b, and 9c in this order.
Page 360 Assembling Note: When assembling the Feed roller, be sure to assemble it in a way that the Rib of the T2 paper feed frame unit comes between “A” and “B” of the Lift lever B, and the lever of the T2 paper feed holder comes in front of “B”.
Page 361 (11) Release the Hook and remove the Gear 33 from the T2 frame L unit. Gear 33 T2 frame L unit <Left side> Hook Fig. 3-291 (12) Remove the Extension spring from the Spring hook. (13) Release the Hook and remove the Gear 46/55 from the T2 frame L unit. T2 frame L unit Hook <Left side>...
Page 362 (14) Remove the Taptite cup S M3x6 SR screw and remove the T2 solenoid holder ASSY from the T2 frame L unit. (15) Remove the Gear 46 from the T2 frame L unit. T2 frame L unit Gear 46 T2 solenoid holder ASSY Taptite cup S M3x6 SR <Left side>...
Page 363 (18) Turn the T2 frame L unit right side up. (19) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR <Back side> Fig. 3-295 (20) Remove the two Taptite cup S M3x6 SR screws from the T2 beam rear. T2 beam rear Taptite cup S M3x6 SR <Left side>...
Page 364 (21) Remove the Taptite bind B M4x10 screw and Bush from the T2 frame L unit. T2 frame L unit Taptite bind B M4x10 Bush <Left side> Fig. 3-297 (22) Remove the T2 paper feed frame unit from the Main body in the order of the arrow 22a and arrow 22b.
Page 365 (23) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow. (24) Rotate the T2 separation roller ASSY in the direction of the arrow 24a. Remove the T2 separation roller ASSY from the T2 paper feed drive shaft in the direction of the arrow 24b. T2 paper feed frame unit T2 paper feed frame unit T2 paper feed drive shaft...
Page 366 (25) Release the Hook and remove the T2 paper pick-up roller ASSY from the T2 paper feed drive shaft. T2 paper feed frame unit Hook T2 paper feed drive shaft T2 paper pick-up roller ASSY Fig. 3-301 (26) Remove the “A” of the T2 edge actuator spring from the Hook of the T2 paper feed frame unit.
Page 367 (27) Remove the T2 paper feed spring from the Hook of the T2 paper feed frame unit and the Hook of the T2 paper feed holder ASSY. T2 paper feed spring Hook T2 paper feed holder ASSY T2 paper feed frame unit Hook of the T2 paper feed holder ASSY Fig.
Page 368 (29) Slide the T2 paper feed drive shaft in the direction of the arrow 29a and remove the T2 paper feed holder bushing from the T2 paper feed holder ASSY. T2 paper feed holder ASSY T2 paper feed drive shaft T2 paper feed holder bushing Fig.
Page 369 (31) Pull out the T2 paper feed drive shaft from the T2 paper feed holder ASSY and T2 edge actuator. (32) Remove the T2 edge actuator from the T2 paper feed holder ASSY. T2 paper feed holder ASSY T2 edge actuator T2 paper feed drive shaft Fig.
Page 370: If You Replace The Main Pcb Assy
CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT IF YOU REPLACE THE MAIN PCB ASSY ■ What to do after replacement - Installing the Firmware (Sub firmware, Panel firmware, Main Firmware, and High-voltage firmware) - Initializing the EEPROM of the Main PCB ASSY (Function code 01) - Setting the Serial Number (Function code 80) - Restore Machine Information (Function code 41) - Setting by Country (Function code 74)
Page 371: Installing The Firmware (Sub Firmware, Panel Firmware, Main Firmware, And High-Voltage Firmware)
Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware) 1.1.1 Checking firmware version Check whether the firmware installed in the machine is the latest version. If the version is the latest, updating the firmware is unnecessary. If the version is not the latest, install the latest firmware into the machine following the instructions provided in “1.1.2 Installing the firmware”...
Page 372 1.1.2 Installing the firmware ■ Installing the firmware using USB flash memory Memo: - Installing the firmware using a USB flash memory is not possible in deep sleep mode. Open and close the front cover, etc. to quit the deep sleep mode before installing the firmware.
Page 373: Initializing The Eeprom Of The Main Pcb Assy (Function Code 01)
Chapter (2) Connect the computer to the machine with the USB cable. (3) Open the temporary folder, double-click the “Filedg32.exe” to start, and select “Brother Maintenance USB Printer”. (4) Drag and drop a necessary program file (for instance, LZXXXX_$.djf) located in the same folder to the Brother Maintenance USB Printer icon located within the FILEDG32 screen.
Page 374: Setting The Serial Number (Function Code 80)
(4) Select “3 Color-Laser” in [Product Category] field. (5) Select “2014_MFC”. (6) In [Port] field on the BrUsbSn screen, select the port assigned to Brother Maintenance USB Printer. (7) Enter the serial number (15 digits) of the machine into the box on the [Serial No] field.
Page 375: Continuous Adjustments Of Density And Registration Sensor (Function Code 73)
Continuous Adjustments of Density and Registration Sensor (Function code 73) Perform continuous adjustments of density and registration sensor in accordance with “1.3.29 Continuous adjustments of density and registration sensor (Function code 73)” in Chapter Acquisition of White Level Data (Function code 55) Perform the acquisition of white level data in accordance with “1.3.19 Acquisition of white level data and setting of CIS scanning area (Function code 55)”...
Page 376: If You Replace The Registration Mark Sensor Unit
IF YOU REPLACE THE REGISTRATION MARK SENSOR UNIT ■ What to do after replacement - Continuous Adjustments of Density and Registration Sensor (Function code 73) Continuous Adjustments of Density and Registration Sensor (Function code 73) Perform continuous adjustments of density and registration sensor in accordance with “1.3.29 Continuous adjustments of density and registration sensor (Function code 73)”...
Page 377: If You Replace The Low-Voltage Power Supply Pcb Unit
IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB UNIT ■ What to do after replacement - Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) Perform resetting irregular power supply detection counter of the low-voltage power supply...
Page 378: If You Replace The Process Drive Unit
IF YOU REPLACE THE PROCESS DRIVE UNIT ■ What to do after replacement - Motor Reset (Function code 57) Motor Reset (Function code 57) Perform motor reset in accordance with “1.3.20 Motor reset (Function code 57)” in Chapter Confidential...
Page 379: If You Replace The High-Voltage Power Supply Pcb Assy
IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY ■ What to do after replacement - Installing the Firmware - Continuous Adjustments of Density and Registration Sensor (Function code 73) ■ What you need to prepare (1) USB flash memory (2) A USB cable ®...
Page 380: If You Replace The Lcd Panel Assy Or Panel Control Pcb Assy
IF YOU REPLACE THE LCD PANEL ASSY OR PANEL CONTROL PCB ASSY ■ What to do after replacement - Installing the Firmware - Adjustment of Touch Panel (Function code 61) - Operational Check of LCD (Function code 12) ■ What you need to prepare (1) USB flash memory (2) A USB cable ®...
Page 381: If You Replace The Laser Unit
IF YOU REPLACE THE LASER UNIT ■ What to do after replacement - Continuous Adjustments of Density and Registration Sensor (Function code 73) - Counter Reset of Laser Unit (Reset Counters for Parts (Function code 88)) Continuous Adjustments of Density and Registration Sensor (Function code 73) Perform continuous adjustments of density and registration sensor in accordance with “1.3.29...
Page 382: If You Replace The First Side Cis Unit, Document Scanner Unit
IF YOU REPLACE THE FIRST SIDE CIS UNIT, DOCUMENT SCANNER UNIT ■ What to do after replacement - Acquisition of White Level Data (Function code 55) - Scanning and Printing Check Acquisition of White Level Data (Function code 55) Perform the acquisition of white level data in accordance with “1.3.19 Acquisition of white level data and setting of CIS scanning area (Function code 55)”...
Page 383: If You Replace The Adf Unit, Second Side Cis Unit
IF YOU REPLACE THE ADF UNIT, SECOND SIDE CIS UNIT ■ What to do after replacement - Acquisition of White Level Data (Function code 55) - Scanning and Printing Check Acquisition of White Level Data (Function code 55) (Duplex Scanning Model Only) Perform the acquisition of white level data in accordance with “1.3.19 Acquisition of white level data and setting of CIS scanning area (Function code 55)”...
Page 384: If You Replace The Fuser Unit/Pf Kit 1, 2, And Mp
10. IF YOU REPLACE THE FUSER UNIT/ PF KIT 1, 2, AND MP ■ What to do after replacement - Counter Reset of Fuser Unit or PF Kit 1, 2, and MP (Reset Counters for Parts (Function code 88)) 10.1 Counter Reset of Fuser Unit or PF Kit 1, 2, and MP (Reset Counters for Parts (Function code 88)) Perform counter reset of the fuser unit or PF kit 1, 2, and MP in accordance with “1.3.37 Reset...
Page 385: Chapter 5 Service Functions
CHAPTER 5 SERVICE FUNCTIONS MAINTENANCE MODE The maintenance mode is exclusively designed for the checking, setting and adjustments of the machine by using the keys on the control panel. You can check the operations of sensors, perform a print test, display the log information or error codes, and modify the worker switch (WSW). How to Enter the Maintenance Mode 1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel...
Page 386: How To Enter The End User-Accessible Maintenance Mode
1.1.2 How to Enter the End User-accessible Maintenance Mode Basically, the maintenance-mode functions listed in the next page should be accessed by service personnel only. However, you can allow end users to access some of these under the guidance of service personnel by phone, for example. The end user-accessible functions are shaded in the table given on “1.2 List of Maintenance-mode Functions”.
Page 387: List Of Maintenance-Mode Functions
List of Maintenance-mode Functions Function Function Refer to: code EEPROM parameter initialization 1.3.1 (5-5) Printout of scanning compensation data 1.3.2 (5-6) ADF performance test 1.3.3 (5-8) Monochrome image quality test pattern 1.3.4 (5-9) Worker switch (WSW) setting 1.3.5 (5-10) Printout of worker switch (WSW) data 1.3.5 (5-10) Operational check of LCD 1.3.6 (5-14)
Page 388 Function Function Refer to: code Continuous adjustments of density and registration 1.3.29 (5-55) sensor Setting by country 1.3.30 (5-56) Printout of maintenance information 1.3.31 (5-59) Operational check of fans 1.3.32 (5-61) Display of device log information 1.3.33 (5-62) Display of device error codes 1.3.34 (5-66) Developing bias voltage correction 1.3.35 (5-67)
Page 389: Detailed Description Of Maintenance-Mode Functions
Detailed Description of Maintenance-mode Functions 1.3.1 EEPROM parameter initialization (Function code 01, 91) <Function> This function is used to initialize the setting values for operation parameters, user switches, and worker switches (WSW) registered in the EEPROM. Entering function code 01 initializes most EEPROM areas.
Page 390: Printout Of Scanning Compensation Data (Function Code 05)
1.3.2 Printout of scanning compensation data (Function code 05) <Function> This function is used to print the contrast level data for document scanning compensation. <Operating procedure> Note: - Be sure to execute this operating procedure not immediately after the power is turned ON, but after conducting the document scanning operation at least once in scanning.
Page 391 ■ Common to first and second side Fig. 5-1 Confidential...
Page 392: Adf Performance Test (Function Code 08)
1.3.3 ADF performance test (Function code 08) <Function> This function is used to test the performance of the automatic document feeder (ADF). The scanned pages of the documents fed by the ADF are counted and the result is displayed on the LCD.
Page 393: Monochrome Image Quality Test Pattern (Function Code 09)
1.3.4 Monochrome image quality test pattern (Function code 09) <Function> This function is used to print various monochrome test patterns and check the quality and if there is any image loss. <Operating procedure> (1) Press the 0 and 9 keys in this order in the initial state of the maintenance mode. “MAINTENANCE 09”...
Page 394: Worker Switch (Wsw) Setting And Printout (Function Code 10, 11)
1.3.5 Worker switch (WSW) setting and printout (Function code 10, 11) [1] Worker switch (WSW) setting (Function code 10) <Function> The worker switches shown in the table below can be used to set the function to satisfy various requirements. The switch setting can be changed using the keys on the control panel. The worker switches are factory set to conform with the laws and regulations of the country the machine is shipped to.
Page 395 WSW No. Function WSW No. Function WSW57 Function setting 22 WSW73 Reserved (Change of the setting is prohibited) WSW58 Function setting 23 WSW59 Function setting 24 WSW74 ADF stop control WSW60 Function setting 25 WSW75 Paper ejecting distance of the switch back WSW61 Scanning light intensity to judge...
Page 396 <Operating procedure> (1) Press the 1 and 0 keys in this order in the initial state of the maintenance mode. “WSW00” is displayed on the LCD. (2) Enter the number of worker switch to change. The following is displayed on the LCD. Selector 1 Selector 8 (3) Move the cursor to the selector you want to change with the...
Page 397 [2] Printout of worker switch (WSW) data (Function code 11) <Function> This function is used to print out the setting items and the details set by the worker switches. <Operating procedure> (1) Press the 1 key twice in the initial state of the maintenance mode. (2) “PRINTING”...
Page 398: Operational Check Of Lcd (Function Code 12)
1.3.6 Operational check of LCD (Function code 12) <Function> This function is used to check that the LCD on the control panel is operating normally. <Operating procedure> (1) Press the 1 and 2 keys in this order in the initial state of the maintenance mode. A completely blank screen is displayed on the LCD.
Page 399: Operational Check Of Control Panel Key (Function Code 13)
1.3.7 Operational check of control panel key (Function code 13) <Function> This function is used to check that the keys on the control panel operate normally. <Operating procedure> (1) Press the 1 and 3 keys in this order in the initial state of the maintenance mode. “00” is displayed on the LCD.
Page 400: Software Version Check (Function Code 25)
1.3.8 Software version check (Function code 25) <Function> This function is used to check the version information of the firmware or programs, or check sum information. <Operating procedure> (1) Press the 2 and 5 keys in this order in the initial state of the maintenance mode. “TOTAL:Ver*”...
Page 401: One Push Demo" Setting (Function Code 28)
1.3.9 “One Push Demo” setting (Function code 28) <Function> The One Push Demo function is to implement demo printing by key operation, which is mainly used for sales promotion at the shop. This function is disabled once printing is performed from the computer. Change the setting to enable the function.
Page 402: Operational Check Of Sensors (Function Code 32)
1.3.10 Operational check of sensors (Function code 32) <Function> This function is used to check that the sensors are operating normally. <Operating procedure> (1) Press the 3 and 2 keys in this order in the initial state of the maintenance mode. “C1C2MPCVRCPO****”...
Page 403 Sensor names Detection status (displayed/not displayed) ° MAC XXC Internal temperature sensor C/NG ° BT XXC Belt temperature sensor C (The value will not be changed since this sensor is not installed.) ° TMP XXC External temperature sensor C/NG HUM XXC External humidity sensor XX %/NG Document detection sensor...
Page 404 Toner/new sensor PCB ASSY MP paper empty sensor Develop release sensor PCB ASSY MP registration front sensor New toner sensor (Black) Toner sensor (Black) New toner sensor (Cyan) MP upper cover Toner sensor (Cyan) ASSY New toner sensor (Magenta) Toner sensor (Magenta) Waste toner sensor New toner sensor (Yellow) Toner sensor (Yellow)
Page 405 Second side document ADF cover/document detection scanning position sensor sensor PCB First side document scanning position sensor Lower ADF chute ADF cover sensor Document detection sensor Fig. 5-9 5-21 Confidential...
Page 406: Lan Connection Status Display (Function Code 33)
1.3.11 LAN connection status display (Function code 33) <Function> This function is used to check the connection status of the wired LAN. <Operating procedure> (1) Press the 3 key twice in the initial state of the maintenance mode. (2) Based on the wired LAN connection status of the machine, the corresponding items shown in the table below is displayed on the LCD.
Page 407: Eeprom Dump Print (Function Code 40)
1.3.12 EEPROM Dump Print (Function code 40) <Function> This function is to print the EEPROM information. <Operating procedure> (1) Press the 4 and 0 keys in this order in the initial state of the maintenance mode. “E2PDUMP ENGN ALL” is displayed on the LCD. (2) Press the key to select the information you wish to print.
Page 408: Backup Of Machine Information (Function Code 41)
<Operating procedure> Backup Procedure (1) On the computer, create a “BROTHER” folder in an USB flash memory to be used for saving backup data. (2) Insert the USB flash memory into the slot of the machine in the initial state of the maintenance mode.
Page 409 The USB flash memory is being used by another operation. Insert USB Mem No USB flash memory is inserted. No file The file name is invalid or no “BROTHER” folder exists. USB Mem Error USB flash memory error Write Error The USB flash memory does not have enough space.
Page 410: Pc Print Function Setting (Function Code 43)
1.3.14 PC print function setting (Function code 43) <Function> This function is used to change the settings of the various print functions summarized in the table below. <Operating procedure> (1) Press the 4 and 3 keys in this order in the initial state of the maintenance mode. “Manual Feed”...
Page 411 Initial Detail description Set value value Auto FF Switching of the auto form On/Off feed Auto FF Time Switching of the time-out 1 to 99 (seconds) period of the auto form feed (seconds) FF Surpress Switching of the FF On/Off Suppress Auto LF Switching of the auto LF...
Page 412 Detail description Page Protection Allocate the page memory used for the internal processing of data in the computer before output. Set in the PCL-Core. There is not the influence of the memory management problem of the machine. Emulation Configure the setting for the Emulation. Change the setting of the Function Menu.
Page 413 1.3.15 Changing return value of USB No./Switching Dither Pattern/ Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color/ Switching of timing to execute Auto Registration/ Adjusting left-end print start position on second side in duplex printing/ Change of the transfer current setting/Change of ghost reduction setting (Function code 45) ■...
Page 414 ■ Switching Dither Pattern <Function> This function is to switch the dither pattern when printed letters and/or slanted lines are not smooth, and thin lines are rough or uneven. Description PS.DitherType=0 Dither Pattern 0 is selected. (A dither pattern which improves roughness of letters and slanted lines) (default) PS.DitherType=1 Dither Pattern 1 is selected.
Page 415 ■ Switching of timing to execute Auto Registration <Function> Relative displacement between Cyan, Magenta, Yellow, and Black is detected using the registration mark sensor, and the Auto Registration is executed at the timing when the displacement value exceeds the stipulated threshold value. This function is to switch the threshold value which is used as the timing to execute Auto Registration.
Page 416 ■ Change of the transfer current setting (Only for Japanese hagaki printing) <Function> Dots appeared when hagaki printing is performed can be alleviated by changing the transfer current setting. <Operating procedure> (1) Press the 4 and 5 keys in this order in the initial state of the maintenance mode. “USBNo.” is displayed on the LCD.
Page 417 1.3.16 Set country/language (Function code 52) <Function> This function is user accessible, and is used to customize the EEPROM according to the language, function settings, and worker switch settings. Note: This function is applied to “France Belgium Netherlands”, “Pan-Nordic”, “East Europe”, “Oceania”, and “Iberia”...
Page 418 1.3.17 Transfer of received fax data and log information (Function code 53) <Function> When the machine is unable to print the received fax data due to an error current in the printing mechanism, this function is used to transfer the data to another machine. The communication management report, communication list, or machine log information can also be transferred.
Page 419 ■ Cover page sample Job number Total number of page to be transferred Station ID registered in the sender equipment FAX number of the sender equipment Telephone number of the sender equipment 2014 Transfer start date 8CE-501 Model code Boot ROM info ROM info Serial number Fig.
Page 420 1.3.18 Fine adjustment of scan positions (Function code 54) <Function> This function is used to adjust the scanning start/end positions. <Operating procedure> (1) Press the 5 and 4 keys in this order in the initial state of the maintenance mode. For duplex scanning model, “...
Page 421 1.3.19 Acquisition of white level data and setting of CIS scanning area (Function code 55) <Function> This function is used to acquire the white level of CIS scanner and save it together with the scanning area into EEPROM of the main PCB. <Operating procedure>...
Page 422 1.3.20 Motor reset (Function code 57) <Function> When the main PCB or each motor is replaced, the main PCB needs to identify each motor. If you reset the identification of each motor in the main PCB with this function, when the power is turned ON next time, a motor identification operation for each motor is performed before the engine performs a warm-up.
Page 423 This adjustment requires a touch panel stylus with a thin tip. A commercially available stylus designed for electronic dictionaries or personal digital assistance (PDA) can be used. If you do not have it on hand, order the “TOUCH PEN” from the Brother's parts list. <Operating procedure>...
Page 424 1.3.22 Adjustment of color registration (Adjustment of inter-color position alignment) (Function code 66) <Function> This function allows service personnel to forcibly activate the adjustment of color registration (adjustment of inter-color position alignment) function which is usually executed automatically under a specified condition. If adjustment of inter-color position alignment (auto) fails because toner reaches its life, etc, you can adjust inter-color position alignment manually.
Page 425 ■ Adjustment of inter-color position alignment without registration sensor calibration (auto) <Operating procedure> (1) Press the 6 key twice in the initial state of the maintenance mode. “REGISTRATION” is displayed on the LCD. (2) Press the SET key. “PLS WAIT 66-1” is displayed on the LCD, and adjustment of inter- color position alignment is automatically done.
Page 426 ■ Printing of misregistration correction chart <Operating procedure> (1) Press the 6 key twice in the initial state of the maintenance mode. “REGISTRATION” is displayed on the LCD. (2) Press the key to display “PRINT CHART” on the LCD. (3) Press the SET key. “PRINTING” is displayed on the LCD, and misregistration correction chart (see the figure below) is printed.
Page 427 ■ Adjustment of inter-color position alignment (manual) <Operating procedure> (1) Press the 6 key twice in the initial state of the maintenance mode. “REGISTRATION” is displayed on the LCD. (2) Press the key to display “SET REGISTRATION” on the LCD. (3) Press the SET key.
Page 428 1.3.23 Continuous print test (Function code 67) <Function> This function is used to conduct paper feed and eject tests while printing patterns. <Operating procedure> (1) Press the 6 and 7 keys in this order in the initial state of the maintenance mode. “SELECT: K 100%”...
Page 429 <Print pattern> Description SELECT: K 100% Black 100% solid print SELECT: C 100% Cyan 100% solid print SELECT: M 100% Magenta 100% solid print SELECT: Y 100% Yellow 100% solid print SELECT: W 100% White 100% solid print SELECT: R 100% Red 100% solid print SELECT: G 100% Green 100% solid print...
Page 430 <Print type> Description SELECT: TRAY1 SX One-sided printing from Paper tray 1 SELECT:TRAY2 SX One-sided printing from T2 paper tray unit SELECT: MP SX One-sided printing from MP tray SELECT: TRAY1 DX Two-sided printing from Paper tray 1 SELECT:TRAY2 DX Two-sided printing from T2 paper tray unit SELECT: MP DX Two-sided printing from MP tray...
Page 431 ■ Print pattern SELECT: K 100% SELECT: C 100% SELECT: M 100% SELECT: Y 100% SELECT: W 100% SELECT: R 100% SELECT: G 100% SELECT: B 100% SELECT: KCMY1% SELECT: KCMY5% SELECT: Lattice SELECT: Total (When Print type is DX) SELECT: Total (When Print type is SX) Fig.
Page 432 1.3.24 Laser unit test pattern print (Function code 68) <Function> This function is used to print the laser unit test patterns and check if there is any failure in the laser unit. <Operating procedure> (1) Press the 6 and 8 keys in this order in the initial state of the maintenance mode. “PRINTING”...
Page 433 1.3.25 Frame pattern print (One-sided) (Function code 69) <Function> This function is used to print one page of the frame pattern of the external circumference in one-sided printing and check if there is any deviation or omission of print. <Operating procedure> (1) Load the paper whose size matches the default paper setting (A4 or Letter) into the paper tray.
Page 434 1.3.26 Frame pattern print (Two-sided) (Function code 70) <Function> This function is used to print one page of the frame pattern of the external circumference in two-sided printing and check if there is any deviation or omission of print. <Operating procedure> (1) Load the paper whose size matches the default paper setting (A4 or Letter) into the paper tray.
Page 435 1.3.27 Color test pattern (Function code 71) <Function> This function is used to print the pattern of each color and check if there is any dirty on or failure in the belt unit, developer roller, and exposure drum, etc. <Operating procedure> (1) Press the 7 and 1 keys in this order in the initial state of the maintenance mode.
Page 436 <Print pattern> Description 2D3S YMCBWKW_A Total seven sheets of one sheet for each color with full page print mode* + two blank sheets + data to check Banding 2D3S M Magenta 2D3S K Black 2D3S C Cyan 2D3S Y Yellow 2D3S MCYK 4-color horizontal band * In the full page print mode, the cleaning operation is performed between printing of blank...
Page 437 <Number of pages to be printed> Description SELECT: 1PAGE One page printing SELECT: CONTINUE Continuous printing <Error message> Measure Replace Toner Replace the empty toner cartridge and press the Mono Start key to clear the error. Cover is Open Close the front cover. No Paper Load paper into the paper tray, close the paper tray, and press the Mono Start key to clear the error.
Page 438 1.3.28 Sensitivity adjustment of density sensor (Function code 72) <Function> This function is used to print the patch data for density sensor sensitivity adjustment on the belt unit and measure the density with the density sensor. The characteristics of the density sensor are calculated based on the value measured by the density sensor, and the parameter for correcting developing bias voltage is adjusted.
Page 439 1.3.29 Continuous adjustments of density and registration sensor (Function code 73) <Function> This function is used to perform the following functions consecutively: Sensitivity adjustment of density sensor (Function code 72), Developing bias voltage correction (Function code 83), and Adjustment of color registration (Adjustment of inter-color position alignment) including registration sensor calibration (Function code 66).
Page 440 Note: If there is a pause of more than one minute, the machine will automatically return to the initial state of the maintenance mode. <Spec code> MODEL Spec code Spec code (Detail) DCP-L8400CDN Brazil 0042 CEE-General 1004 China 0020 France/Belgium/Netherlands...
Page 441 MODEL Spec code Spec code (Detail) MFC-L8650CDW CEE-General 0388 Bulgaria 0332 Croatia 0381 Czecho 0337 Hungary 0338 Poland 0339 Romania 0333 Slovakia 0330 Slovenia 0382 Others 0350 China 0120 France/Belgium/Netherlands 0355 Belgium 0308 France 0305 Netherlands 0309 Germany 0303 Italy/Iberia 0366 Italy 0316...
Page 442 0512 Norway 0507 Sweden 0526 Others 0550 Russia 0548 Switzerland 0510 U.S.A 0501 0504 Note: The above information is as of March 2016. Please confirm the latest firmware information which is available from your local Brother Customer Service. 5-58 Confidential...
Page 443 1.3.31 Printout of maintenance information (Function code 77) <Function> This function is used to print the maintenance information, such as the remaining amount of consumables, number of replacements, and counter values. <Operating procedure> (1) Press the 7 key twice in the initial state of the maintenance mode. Maintenance information starts to be printed.
Page 444 Model name Remaining life of PF kit 1 Serial number Remaining life of PF kit 2 Model code Remaining life of belt unit Spec code Remaining life of fuser unit Switch checksum (factory use) Remaining life of laser unit Main firmware version Total printed page Color/Monochrome Sub firmware version Total copied pages Color/Monochrome...
Page 445 1.3.32 Operational check of fans (Function code 78) <Function> This function is used to check that each fan is operating normally. The rotation speed is changed among three settings: 100%, 50% and OFF Parts name Description Fuser fan Evacuate hot air of the fuser unit. Power fan Evacuate hot air of the low-voltage power supply PCB unit.
Page 446 1.3.33 Display of device log information (Function code 80) <Function> This function is used to display the log information on the LCD. <Operating procedure> (1) Press the 8 and 0 keys in this order in the initial state of the maintenance mode. “MACERR_01:****”...
Page 447 Description MN_FAX:00000000 Total number of monochrome List/FAX printed pages *3 CCVRGUSI:4.32% Average coverage of cyan toner cartridge in use CCVRGACC:3.47% Accumulated average coverage of cyan toner cartridge MCVRGUSI:4.32% Average coverage of magenta toner cartridge in use MCVRGACC:3.47% Accumulated average coverage of magenta toner cartridge YCVRGUSI:4.32% Average coverage of yellow toner cartridge in use YCVRGACC:3.47%...
Page 448 Description YTN_CH:0000 Number of times that the yellow toner cartridge has been replaced KTN_CH:0000 Number of times that the black toner cartridge has been replaced DRUM_CH:0000 Number of times that the drum unit has been replaced WTNR_CH:0000 Number of times that the waste toner box has been replaced BELT_CH:0000 Number of times that the belt unit has been replaced FUSR_CH:0000...
Page 449 01 to 10 are entered in ## in chronological order. When you press the SET key as the machine error history is displayed, “PGCNT:00000000” (the page counter when the error occurred) is displayed on the LCD. When you press the OK key or the SET key once more, “TMP:000 HUM:000”...
Page 450 1.3.34 Display of device error codes (Function code 82) <Function> This function is used to display the latest error code on the LCD. <Operating procedure> (1) Press the 8 and 2 keys in this order in the initial state of the maintenance mode. “MACHINE ERR XXXX”...
Page 451 1.3.35 Developing bias voltage correction (Function code 83) <Function> This function performs developing bias voltage correction to fix the density of each color toner when printed color is not correct. Note: Before this function is performed, there is a need that the “1.3.28 Sensitivity adjustment of density sensor (Function code 72)”...
Page 452 1.3.36 Sending of communication log information to telephone line (Function code 87) <Function> This function is used to send the error list to service personnel at a remote service station when a fax communication problem has occurred in the user's machine. Receiving the error list allows the service personnel to analyze the problem current in the user's machine.
Page 453 1.3.37 Reset counters for parts (Function code 88) <Function> After replacing a fuser unit, PF kit 1, 2, MP, laser unit, or low-voltage power supply PCB unit, perform this function to increase the replacement count by one and reset the count to clear the “Replace ***”...
Page 454 OTHER SERVICE FUNCTIONS Printing of Communication List <Function> This function is used to print Communication List. <Operating procedure> (1) Hold down the Home key for about 5 seconds while the machine is in the ready state. The serial number screen is displayed on the LCD. Memo: If you cannot find the Home key, press the Toner key, and the Home key lights up.
Page 455 Drum Cleaning <Function> This function is to attach a special cleaning sheet on the drum unit and perform the cleaning of the drum. <Operating procedure> (1) Press the Settings) key in the ready state. (2) Press the All Settings key. (3) Press the key to display “Machine Info.”...
Page 456 Counter Reset of Consumable Parts (Drum unit/Belt unit) <Function> After replacing a drum unit or belt unit, perform this function to increase the replacement count by one and reset the count to clear the “Replace ***” warning. <Operating procedure> (1) Press the Settings) key in the ready state.
Page 457 CHAPTER 6 WIRING DIAGRAM WIRING DIAGRAM PANEL UNIT CN31 22 HU+ CN27 POWER MAIN PCB ASSY PANEL CONTROL LED- 1 21 HU- RESPONCE 1 LED+ 2 20 HV+ PCB ASSY +3.3V 2 19 HV- RD 3 COMMAND 3 18 HW+ WR 4 SGND 4 GND 5...
Page 458 CHAPTER 7 PERIODICAL MAINTENANCE SAFETY PRECAUTIONS To avoid creating secondary problems by mishandling, follow the warnings and precautions below during maintenance work. WARNING Some parts inside the machine are extremely hot immediately after the machine is used. When opening the front cover or back cover to access any parts inside the machine, never touch the shaded parts shown in the following figures.
Page 459 PERIODICAL REPLACEMENT PARTS Procedures to Replace Periodical Replacement Parts ■ Preparation Prior to proceeding with the disassembly procedure, (1) Unplug - the AC cord, - the telephone line, - the USB flash memory, - the USB cable, if connected, and - the LAN cable, if connected.
Page 460 2.1.1 Fuser unit (1) Open the Back cover. Main body Back cover <Back side> Fig. 7-1 (2) Remove the Back cover stopper arm L/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover Back cover stopper arm R <Back side>...
Page 461 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 7-3 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 462 (5) Open the Back flapper holder. Release the two Pins and remove the Back flapper holder from the Main body. Main body <Back side> Back flapper holder Fig. 7-5 (6) Remove the two Taptite bind B M4x12 screws from the Fuser cover L. (7) Remove the one Hook and one Pin and remove the Fuser cover L from the Main body.
Page 463 (8) Release the lock of the Fuser cover lock lever L/R to open the Fuser cover ASSY. Main body Fuser cover lock lever L Fuser cover ASSY <Back side> Fuser cover lock lever R Fig. 7-7 (9) Slide the Fuser cover ASSY in the direction of the arrow 9a and remove it to the front. Main body Fuser cover ASSY <Back side>...
Page 464 (10) Remove the Cleaner roller spring from the Hook of the Fuser cover ASSY. Hook Fuser cover ASSY Cleaner roller spring Cleaner pinch roller S ASSY Fig. 7-9 (11) Remove the Cleaner roller spring from the two Pins of the Fuser cover ASSY. Remove the Cleaner pinch roller S ASSY and Cleaner roller spring from the Fuser cover ASSY.
Page 465 (12) Remove the Cleaner pinch roller S ASSY from the Cleaner roller spring. Cleaner roller spring Cleaner pinch roller S ASSY Fig. 7-11 (13) Remove the other three Cleaner pinch roller S ASSYs in the same way. (14) Remove the two Taptite bind B M4x12 screws from the Fuser cover R. (15) Release the two Hooks and remove the Fuser cover R from the Main body.
Page 466 (16) Disconnect the two Connectors (CN1 and CN2) from the Eject sensor PCB ASSY. Connector (Center thermistor harness Connector Eject sensor PCB ASSY <Back side> Fig. 7-13 Assembling Note: * Center thermistor has a black and blue connectors (230V models only). The black connector may be connected to the blue insertion port and vice versa.
Page 467 (18) Remove the two Taptite pan B M4x14 screws to remove the Fuser unit from the Main body. Main body Taptite pan B M4x14 Fuser unit Taptite pan B M4x14 <Back side> Fig. 7-15 Note: - Do not apply a physical impact or vibration to the Fuser unit. - Do not touch the roller and electrodes as shown in the figure below to prevent breakage of the Fuser unit.
Page 468 (19) Release the five Hooks and remove the Toner filter ASSY from the Paper eject ASSY. Paper eject ASSY Paper eject ASSY Hook Hook Toner filter ASSY Hook Fig. 7-17 (20) After replacing the Fuser unit, reset the counter. (Refer to “1.3.37 Reset counters for parts (Function code 88)”...
Page 469 2.1.2 Laser unit (1) Open the Back cover. Main body Back cover <Back side> Fig. 7-18 (2) Remove the Back cover stopper arm L/R from the Main body. Main body Back cover stopper arm L Back cover stopper arm L Back cover Back cover stopper arm R <Back side>...
Page 470 (3) Remove the Shaft of the Back cover from the Bush on the right side of the Main body. Main body Shaft Bush Back cover <Back side> Fig. 7-20 (4) Remove the Back cover. Main body <Back side> Back cover Fig.
Page 471 (5) Open the Front cover. Main body Front cover Fig. 7-22 (6) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover L. (7) Remove the Taptite bind B M4x12 screw from the side of the Side cover L. Main body Side cover L Taptite B 3x6...
Page 472 (8) Remove the two Taptite bind B M4x12 screws from the back of the Side cover L. Side cover L Taptite bind B M4x12 <Back side> Fig. 7-24 7-15 Confidential...
Page 473 ■ A4 model (9) Release the Hooks 1 to 8 in numerical order. Move the Side cover L in the direction of the arrow 9a and release the other Hooks and remove Side cover L from the Main body. Hook Hook Hook Hook...
Page 474 (10) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover R. Taptite B 3x6 <Front side> Side cover R Taptite bind B M4x12 Fig. 7-27 (11) Remove the two Taptite bind B M4x12 screws from the back of the Side cover R. Taptite bind B M4x12 Side cover R...
Page 475 (12) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 12a and release the other Hooks and remove Side cover R from the Main body. Hook Hook Main body Hook Hook Hook 7...
Page 476 Note: As the Spacer tends to come off, be careful not to lose it. Spacer High-voltage power supply PCB ASSY Spacer Spacer Spacer <Right side> Fig. 7-31 (13) Open the Pull arm L and Pull arm R and release the Hooks from the joint of the Document scanner unit.
Page 477 (14) Remove the Screw bind M3x8 screw and remove the Panel FG harness from the Main shield cover plate ASSY. (15) Remove the three Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body. Screw bind M3x8 Panel FG harness Screw bind...
Page 478 (18) Disconnect the four Connectors (CN20, CN27, CN32 and CN33) and two Flat cables (CN37 and CN38) from the Main PCB ASSY. CN33 CN28 CN20 CN38 CN37 CN32 CN27 CN41 Main PCB ASSY CN39 CN49 CN21 CN10 CN12 CN11 CN42 CN43 CN22 CN13...
Page 479 (20) Release all the wiring passes through the Hole of the Joint cover top. (21) Change the angle of the Document scanner unit as shown in the figure to remove it from the Main body. Document scanner unit Joint cover top Hole Flat cable Fig.
Page 480 (23) Release the eight Hooks and remove the Joint cover top from the Main body. Hook Joint cover top Hook Hook Hook Main body Hook Fig. 7-39 (24) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem FG harness from the Main PCB plate.
Page 481 (26) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem ground harness from the High-voltage power supply PCB ASSY. Modem ground harness Screw pan (S/P washer) M3.5x6 High-voltage power supply PCB ASSY <Right side> Fig. 7-41 (27) Disconnect the wiring of the Modem ground harness. (28) Remove the four Taptite bind B M4x12 screws from the Back cover upper.
Page 482 (30) Disconnect the three Connectors (CN4, CN9 and CN11) from the Main PCB ASSY. (31) Disconnect the wiring of the Main USB host harness ASSY. CN33 CN28 CN20 CN38 CN37 CN32 CN27 CN41 Main PCB ASSY CN39 CN49 CN21 CN10 CN12 CN11 CN42...
Page 483 (34) Release the three Hooks 1. Release the other seven Hooks and remove the Joint cover base ASSY from the Main body. Hook Hook Hook Joint cover base ASSY Hook Hook 1 Main body <Front side> Fig. 7-45 (35) Remove the six Taptite bind B M4x12 screws and four Taptite cup S M3x6 SR screws, and remove the Scanner cover plate from the Main body.
Page 484 (36) Disconnect the Laser unit flat cable from the Laser unit. Laser unit Laser unit flat cable <Front side> Fig. 7-47 (37) Remove the five Taptite cup S M3x6 SR screws and remove the four Scanner holders from the Scanner plate. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder...
Page 485 Assembling Note: - When assembling the Scanner holder to “A” of the Laser unit, be sure to use the Scanner holder of which “B” is a screw and not to use other Scanner holders. - When assembling the Scanner holder to “A” of the Laser unit, be sure that the Scanner holder is placed as shown in the figure.
Page 486 ■ Legal model (9) Release the Hooks 1 to 8 in numerical order. Move the Side cover L in the direction of the arrow 9a and release the other Hooks and remove Side cover L from the Main body. Main body Hook Hook Hook 8...
Page 487 (10) Remove the one Taptite B 3x6 screw and the one Taptite bind B M4x12 screw from the front of the Side cover R. Taptite B 3x6 <Front side> Side cover R Taptite bind B M4x12 Fig. 7-53 (11) Remove the two Taptite bind B M4x12 screws from the back of the Side cover R. Taptite bind B M4x12 Side cover R...
Page 488 (12) Release the Hooks 1 to 7 in numerical order. Move the Side cover R in the direction of the arrow 12a and release the other Hooks and remove Side cover R from the Main body. Main body Hook Hook Hook 7 Hook Hook 6...
Page 489 Note: As the Spacer tends to come off, be careful not to lose it. Spacer High-voltage power supply PCB ASSY Spacer Spacer Spacer <Right side> Fig. 7-57 (13) Remove the two Taptite bind B M4x12 screws from the Back cover upper. (14) Release the four Hooks and remove the Back cover upper from the Main body.
Page 490 (15) Remove the Screw bind M3x8 screw and remove the Panel FG harness from the Main shield cover plate ASSY. (16) Remove the three Screw bind M3x8 screws and remove the Main shield cover plate ASSY from the Main body. Screw bind M3x8 Panel FG harness Screw bind...
Page 491 (19) Disconnect the four Connectors (CN20, CN27, CN32 and CN33) and two Flat cables (CN37 and CN38) from the Main PCB ASSY. CN33 CN28 CN20 CN38 CN37 CN32 CN27 CN41 Main PCB ASSY CN39 CN49 CN21 CN10 CN12 CN11 CN42 CN43 CN22 CN13...
Page 492 (23) Remove the two Taptite bind B M4x12 screws from the right side of the Main body. (24) Remove the two Taptite bind B M4x12 screws from the left side of the Main body. (25) Remove the two Taptite cup B M4x12 screws from the back side of the Main body. Taptite cup Taptite bind B M4x12 B M4x12...
Page 493 (28) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem FG harness from the Main PCB plate. (29) Disconnect the Modem flat cable (CN28) from the Main PCB ASSY. CN28 Modem flat cable Modem FG harness <Back side> Main PCB ASSY Screw pan (S/P washer) M3.5x6 Main PCB plate...
Page 494 (31) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem ground harness from the High-voltage power supply PCB ASSY. Modem ground harness Screw pan (S/P washer) M3.5x6 High-voltage power supply PCB ASSY <Right side> Fig. 7-67 (32) Disconnect the wiring of the Modem ground harness. (33) Release the two Hooks A and release the two Hooks B.
Page 495 (36) Disconnect the three Connectors (CN4, CN9 and CN11) from the Main PCB ASSY. (37) Disconnect the wiring of the Main USB host harness ASSY. CN33 CN28 CN20 CN38 CN37 CN32 CN27 CN41 Main PCB ASSY CN39 CN49 CN21 CN10 CN12 CN11 CN42...
Page 496 (40) Release the three Hooks 1. Release the other seven Hooks and remove the Joint cover base ASSY from the Main body. Hook Hook Hook Joint cover base ASSY Hook Hook 1 Main body <Front side> Fig. 7-71 (41) Remove the six Taptite bind B M4x12 screws and four Taptite cup S M3x6 SR screws, and remove the Scanner cover plate from the Main body.
Page 497 (42) Disconnect the Laser unit flat cable from the Laser unit. Laser unit <Front side> Laser unit flat cable Fig. 7-73 (43) Remove the five Taptite cup S M3x6 SR screws and remove the four Scanner holders from the Scanner plate. Taptite cup S M3x6 SR Taptite cup S M3x6 SR Scanner holder...
Page 498 Assembling Note: - When assembling the Scanner holder to “A” of the Laser unit, be sure to use the Scanner holder of which “B” is a screw and not to use other Scanner holders. - When assembling the Scanner holder to “A” of the Laser unit, be sure that the Scanner holder is placed as shown in the figure.
Page 499 2.1.3 PF kit 1 (1) Release the Hook and remove the Separation pad holder ASSY from the Paper tray 1. Separation pad holder ASSY “A” Paper tray 1 “B” Separation pad spring Hook Fig. 7-77 Assembling Note: When assembling the Separation pad holder ASSY, be sure to assemble it in a way that “A”...
Page 500 (3) Push the T1 lift arm to the back and remove “B” of the Roller holder ASSY from “A” of the T1 lift arm. Roller holder ASSY T1 lift arm “B” “A” Fig. 7-79 (4) Slide the Roller holder ASSY in the direction of the arrow and remove it from the T1 drive shaft gear Z17M07.
Page 501 Assembling Note: Align the Hole of the Paper feed unit to the Shaft of the Roller holder ASSY and insert it into the hole. Paper feed unit Paper feed unit Roller holder ASSY Shaft Hole Fig. 7-81 (6) After replacing the PF kit 1, reset the counter. (Refer to “1.3.37 Reset counters for parts (Function code 88)”...
Page 502 2.1.4 PF kit 2 (1) Release the two Hooks of the T2 separation pad ASSY to remove them in the upward direction. Note: Be careful not to lose the T2 separation pad spring. T2 separation pad ASSY Hook Hook T2 paper tray unit Fig.
Page 503 (3) Release the Hook and slide the T2 separation roller ASSY in the direction of the arrow. (4) Rotate the T2 separation roller ASSY in the direction of the arrow 4a. Remove the T2 separation roller ASSY from the T2 paper feed drive shaft in the direction of the arrow 4b. T2 separation roller ASSY T2 separation roller ASSY Hook...
Page 504 (5) Release the Hook and remove the T2 paper pick-up roller ASSY from the T2 paper feed drive shaft. T2 paper feed frame unit T2 paper pick-up roller ASSY Hook T2 paper feed drive shaft Fig. 7-86 (6) After replacing the PF kit 2, reset the counter. (Refer to “1.3.37 Reset counters for parts (Function code 88)”...
Page 505 2.1.5 PF kit MP (1) Press “A” to release the Hook and remove the MP upper frame cover from the MP upper cover ASSY. MP upper frame cover “A” Hook MP upper cover ASSY Fig. 7-87 (2) Remove the MP lift arm B from the MP upper cover ASSY. MP lift arm B MP upper cover ASSY Fig.
Page 506 (3) Release the Hook 1 and rotate the MP holder bushing in the direction of the arrow. (4) Release the Hook 2 and remove the MP holder bushing from the MP upper cover ASSY. Hook 1 Hook 2 MP holder bushing Hook 1 Hook 2 <Front side>...
Page 507 (6) Turn the MP separation pad ASSY upright to remove it from the MP upper cover ASSY. MP separation pad ASSY MP upper cover ASSY MP separation pad ASSY Fig. 7-91 (7) Remove the MP separation pad spring from the two Pins of MP upper cover ASSY. MP separation pad spring MP upper cover ASSY Fig.
Page 508 APPENDIX 1 SERIAL NUMBERING SYSTEM ■ Serial number labels for the printer itself Serial number A 4 J 1 1 1 1 0 1 Model number Serial number (6-digit) Manufacturing factory No. Year of manufacture 4: 2014 5: 2015 Month of manufacture A: January E: May J: September...
Page 509 APPENDIX 2 DELETION OF USER SETTING INFORMATION In this machine, the user setting information is stored in the main PCB. The following procedure allows the factory default settings to be restored in the machine. <Operating procedure> (1) Press the (Settings) key on the LCD in the ready state. (2) Press the All Settings key on the LCD.
Page 510 Maintenance USB Printer driver has been already installed to your computer according to this procedure, skip this section. - Before proceeding to the procedure given below, make sure that the Brother Maintenance USB Printer driver is stored in your computer.
Page 511 (7) Select “Install the software automatically (Recommended)” and click [Next]. (8) Alert warning message of WHQL appears. Click [Continue Anyway] to proceed. App.3-2 Confidential...
Page 512 (9) Repeat steps (6) to (8) three times. Installation is completed. (10) If the Brother Maintenance USB Printer driver is successfully installed, the following message screen appears. Click [Finish] to return. App.3-3 Confidential...
Page 513 Note: In order to check whether the printer driver is successfully installed, click [Start], [Settings], [Printers] to select the Printers window. Then, check that the Brother Maintenance USB Printer icon is shown. App.3-4 Confidential...
Page 514 Disconnect the USB cable that connects the machine with your computer. (2) Turn ON your computer. (3) Double-click Setup.exe inside the Brother Maintenance USB Printer folder that was saved in a temporary folder. The following screen appears. Click the [Next] button.
Page 515 (4) Wait for the following screen to appear and click [Finish]. (5) Plug the power cord of the machine into an electrical outlet. (6) Enter the maintenance mode. (Refer to “1.1 How to Enter the Maintenance Mode” in Chapter (7) Connect the machine to your computer using a USB cable and the installation will be performed automatically.

This manual is also suitable for:

Mfc-l8650cdw Mfc-l9550cdw Dcp-l8450cdw Mfc-l8600cdw Mfc-l8850cdw

Brother DCP-L8400CDN Service Manual

Safety Information

Chapter 1 Supplemental Specifications

Chapter 2 Error Indication and Troubleshooting

Introduction

Overview

Error Indications

Troubleshooting

Chapter 3 Disassembly and Assembly

Safety Precautions

Packing

Screw Catalogue

Screw Torque List

Lubrication

Overview of Gears

Harness Routing

Disassembly Flow

Disassembly Procedure

Disassembly Procedure (Lt-320Cl/Lt-325Cl)

Chapter 4 Adjustments and Updating of Settings

If You Replace the Main Pcb Assy

If You Replace the Registration Mark Sensor Unit

If You Replace the Low-Voltage Power Supply Pcb Unit

If You Replace the Process Drive Unit

If You Replace the High-Voltage Power Supply Pcb Assy

If You Replace the Lcd Panel Assy or Panel Control Pcb Assy

If You Replace the Laser Unit

If You Replace the First Side Cis Unit, Document Scanner Unit

If You Replace the Adf Unit, Second Side Cis Unit

If You Replace the Fuser Unit/Pf Kit 1, 2, and Mp

Chapter 5 Service Functions

Maintenance Mode

Quick Links

Troubleshooting

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Summary of Contents for Brother DCP-L8400CDN