Sharp AL-2021 Service Manual

Digital multifunctional system

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SERVICE MANUAL

DIGITAL MULTIFUNC-

TIONAL SYSTEM

MODEL

AL-2031

AL-2041

CONTENTS

SHARP CORPORATION

CODE: 00ZAL2041/S2E

AL-2021

AL-2031

AL-2041

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

Table of Contents

Summary of Contents for Sharp AL-2021

Page 1: Service Manual
SERVICE MANUAL CODE: 00ZAL2041/S2E DIGITAL MULTIFUNC- TIONAL SYSTEM AL-2021 AL-2021 AL-2031 AL-2041 MODEL AL-2031 AL-2041 CONTENTS [1] GENERAL ......... . . 1 - 1 [2] SPECIFICATIONS .
Page 2 ：'10/Oct/20 CAUTION This product is a class 1 laser product that complies with 21CFR 1040 of the CDRH standard and IEC825. This means that this machine does not produce hazardous laser radiation. The use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
Page 3: Table Of Contents
CONTENTS [1] GENERAL [7] OPERATIONAL DESCRIPTIONS 1. Major functions....... 1-1 1.
Page 4 10. Reverse roller section ......8-16 A. List ........8-16 B.
Page 5: Major Functions
Duplex Shifter FAX (A4) (A4) Tray printer printer SORT desk 1284 (push) Model AL-2021 20CPM 20PPM MB (2.0 speed) AL-2031 20CPM 20PPM MB (2.0 speed) AL-2041 20CPM 20PPM MB (2.0 speed) Descriptions of items CPM: Copy speed (Copies Per Minute)
Page 6: Specifications
Segment (class) Digital personal copier Copier dimensions AL-2021 518mm (W) x 445mm (D) x 298mm (H) (20-1/2" (W) x 17-5/8" (D) x 11-3/4" (H)) AL-2031/2041 518mm (W) x 445mm (D) x 358mm (H) (20-1/2" (W) x 17-5/8" (D) x 14-1/8" (H))
Page 7: Copy Performance
：'10/Oct/20 Section, item Details Fusing section Fusing system Heat roller system Upper heat roller Type Teflon roller Lower heat roller Type Silicon rubber roller Heater lamp Type Halogen lamp Voltage 120V / 220 - 240V Power consumption 800W Electrical section Power source Voltage 120V / 220 - 240V...
Page 8: Splc Printer
：'10/Oct/20 4. SPLC printer Print speed Max. 20ppm (Paper size: A4, excluding manual paper feed) ∗ Varies depending on the PC performance. First print time 8 sec. (without data transfer time) Duplex Yes (AL-2041 only) ROPM Memory 32MB Interface USB 2.0 (Hi Speed) Emulation SPLC MIB support...
Page 9: Supply System Table
[3] CONSUMABLE PARTS 1. Supply system table A. Brazil Name Content Life Product name Package Develop cartridge (Black) 6K Toner/developer cartridge x 1 AL-204TD (A4 5% document) IC-Chip: Yes Stirring function: Yes Develop cartridge (Black) 4K Toner/developer cartridge x 1 AL-214TD (A4 5% document) IC-Chip: Yes...
Page 10: Environmental
：'10/Oct/20 2. Environmental 3. Production control number (lot No.) identification The environmental conditions for assuring the copy quality and the machine operations are as follows: <Developing cartridge> (1) Normal operating condition Temperature: 20°C - 25°C Humidity: 65 ± 5%RH (2) Acceptable operating condition : Model name : Color code Humidity (RH)
Page 11: External Views And Internal Structures
[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES 1. Appearance SPF (AL-2031/2041) Original cover (AL-2021) Original guide Document feeder cover Peep hole (SPF only) Exit area Document feeder tray Interface USB connector Document glass Operation panel Front cover Paper tray Multi-bypass tray...
Page 12: Operation Panel
3. Operation panel Two-sided copy key /Sort key and indicators 10 SCAN key and indicator Use to select sort mode. Two-sided copies from one-sided originals. Turn on Long Edge or Turn on Short Edge can be selected. Exposure mode selector key and indicators 11 ID CARD key and indicator Use to sequentially select the exposure modes: Use to copy ID card.
Page 13: Indicators On The Operation Panel
4. Indicators on the operation panel The start ( ) indicator indicates the state of the printer or scan- ner. SCAN indicator Start indicator Power save indicator Start indicator Indicates the unit is ready for copying or scanning is being performed. Blinking: The indicator blinks in the following situations: •...
Page 14: Motors And Solenoids
5. Motors and solenoids Name Control signal Function / Operation Main motor Drives the copier. Scanner motor MRMT Drives the optical mirror base (scanner unit). Toner motor Supplies toner. Cooling fan motor Cools the optical, fusing section. Resist roller solenoid Resist roller rotation control solenoid Paper feed solenoid CPFS1...
Page 15: Sensors And Switches
6. Sensors and switches Name Signal Type Function / Operation Output Scanner unit home MHPS Transmission sensor Scanner unit home position "H" at home position position sensor detection POD sensor Transmission sensor Paper exit detection "H" at paper pass PPD2 sensor PPD2 Transmission sensor Paper transport detection 2...
Page 16: Pwb Unit
7. PWB unit Name Function / Operation Exposure lamp invertor PWB Exposure lamp (CCFL) control Main PWB (MCU) Copier control Operation PWB Operation input/display High voltage PWB High voltage control CCD sensor PWB For image scanning LSU motor PWB For polygon motor drive TCS PWB For toner sensor control LSU PWB...
Page 17: Cross Sectional View
：'10/Oct/20 8. Cross sectional view Name Function / Operation Scanner unit Illuminates the original with the copy lamp and passes the reflected light to the lens unit (CCD). Exposure lamp Exposure lamp (CCFL) Illuminates original LSU (Laser unit) Converts the original image signal into laser beams and writes onto the drum. Paper exit roller Roller for paper exit Main charger...
Page 18: Unpacking And Installation
[5] UNPACKING AND INSTALLATION 1. Copier installation 2. Cautions on handling Improper installation may damage the copier. Please note the fol- Be careful in handling the copier as follows to maintain the perfor- lowing during initial installation and whenever the copier is moved. mance of this copier.
Page 19: Unpacking
TD cartridge. Protective pins CAUTION tape 3) Push gently on both sides of the front cover to open the cover. AL-2021 AL-2021 4) Remove the TD cartridge from the bag. Remove the protective AL-2031/2041 paper.
Page 20: Loading Paper
6) Close the front cover and then the side cover by pressing the 5) Fan the paper and insert it into the tray. Make sure the edges round projections near the side cover open button. go under the corner hooks. Caution: When closing the covers, be sure to close the front cover Note: Do not load paper above the maximum height line ( securely and then close the side cover.
Page 21: Hardware And Software Requirements
A. Hardware and software requirements 8) Click the "MFP Driver" button. Click the "Display Readme" button to show information on Check the following hardware and software requirements in order to packages that are selected. install the software. Computer IBM PC/AT or compatible computer equipped type with a USB 2.0* /1.1*...
Page 22 Installing the Utility Software 14) Follow the instructions in the plug and play window to install the driver. 11) Click the "Button Manager" or the "Sharpdesk" button. When the "Found New Hardware Wizard" appears, select Click the "Display Readme" button to show information on "Install the software automatically (Recommended)", click the packages that are selected.
Page 23: Configuring The Printer Driver
Port" button displayed below the list and select the printer 2) Click the "SHARP AL-xxxx" icon and select "Properties". to be shared by browsing the network in the window that • In Windows 7, right-click the "SHARP AL-xxxx" icon and appears. select "Scan properties".
Page 24 5) Select "Start this program" and then select "Sharp Button Man- 6) Select "Sharp Button Manager Y" in "Send to this application". ager Y" from the pull-down menu. Note: If other applications are shown, deselect the checkboxes for the other applications and leave only the Button Manager checkbox selected.
Page 25: Interface
10. Interface 12. Scanner moisture-proof kit A. USB If the machine is installed in a highly humid environment, you can alleviate dew condensation inside the scanner by installing the Connector scanner moisture-proof kit described below. Type-B connector A. Components Cable Scanner moisture-proof kit (DKIT-0016QSZZ) Shielded twisted pair cable Name...
Page 26 3) Remove the rear cover for the document glass. Attach along the edge of the projection (the yellow line in the diagram below). <1> Remove the two screws and then remove the right glass holder. <2> Slide the rear cover for the document glass to remove it. <3>...
Page 27 Do not cover this hole. Align the edge of the cushion with Press the mylar with a sharp-pointed stick or something so that the edge of the metal plate. it is stuck correctly. AL-2041 UNPACKING AND INSTALLATION 5 - 10...
Page 28 Stick the lower part of the cushion to the mylar, too. View from Back side Press the cushion with a sharp-pointed stick or something to fill the arrow A the gap between the mylar and the metal plate. Reference position Attach the cushion leaving 3 - 7mm from the edge.
Page 29: Copy Process
[6] COPY PROCESS An OPC drum is used for the photoconductor. (Structure of the OPC drum layers) OPC layer (20 microns thick) Pigment layer (0.2 to 0.3 microns thick) Aluminum drum 1. Functional diagram Main charger Laser beam Cleaning blade MG roller Drum Transfer unit...
Page 30: Outline Of Print Process
2. Outline of print process Step-2: Exposure (laser beam, lens) A Laser beam is generated from the semiconductor laser and con- This printer is a non-impact printer that uses a semiconductor trolled by the print pattern signal. The laser writes onto the OPC laser and electrostatic print process.
Page 31 Step-3: Developing (DC bias) Step-4: Transfer A bias potential is applied to the MG roller in the two component The visible image on the drum surface is transferred onto the print magnetic brush developing method, and the toner is charged nega- paper by applying a positive charge from the transfer corona to the tive through friction with the carrier.
Page 32 Step-7: Optical discharge (Semiconductor laser) Start Before the drum rotation is stopped, the semiconductor laser is 1) Because the grid potential is at a low level, the drum potential radiated onto the drum to reduce the electrical resistance in the is at about -400V.
Page 33: Operational Descriptions
：'10/Oct/20 [7] OPERATIONAL DESCRIPTIONS 1. Outline of operation The outline of operation is described referring to the basic configuration. (Basic configuration) Scanner section Operation section MCU (Main control/image process section) LSU (Laser unit) Laser diode, Polygon mirror lens Laser beam Paper exit Fusing section Process section...
Page 34: Scanner Section
2. Scanner section A. Scanner unit The scanner unit in the digital copier scans images. Spectral sensitivity characteristics (Standard characteristics) It is composed of the optical unit and the drive unit. The optical unit performs scanning in the main scan direction with the light receiving elements (color CCD).
Page 35: Laser Unit
3. Laser unit B. Laser beam path The image data sent from the MCU (image process circuit) is sent to the LSU (laser unit), where it is converted into laser beams. A. Basic structure The LSU unit is the writing section of the digital optical system. The semiconductor laser is used as the light source, and images are formed on the OPC drum by the polygon mirror and fθ...
Page 36: General Description
：'10/Oct/20 A. General description 2) The surface temperature of the upper heat roller is set to 160 - 200°C. The surface temperature during the power save mode is General block diagram (cross section) set to 100°C. Thermal fuse Separator pawl 3) The self-check function comes active when one of the following malfunctions occurs, and an "H"...
Page 37 (1) Cassette paper feed operation 5) At this time, the paper is fed passed the paper entry detection switch (PPD1), and detected by it. After about 0.15 sec from 1) The figure below shows the positions of the pick-up roller, the detection of paper by PPD1, the tray paper feed solenoid (PFS) paper feed clutch sleeve, and the paper feed latch in the initial turns on so that the clutch sleeve projection comes into contact...
Page 38 (2) Manual multi paper feed operation 3) When pawl C of the manual paper feed clutch sleeve is engaged with the manual feed latch, the manual feed stopper 1) Before paper feed operation, the manual paper feed solenoid falls and the manual take-up roller rises. At that time, the man- (MPFS) is turned OFF as shown in the figure below.
Page 39: Process Unit New Drum Detection Mechanism
(3) Conditions of occurrence of paper misfeed 2) When the detection gear 38T turns one rotation, there is no gear any more and it stops. a. When the power is turned on: The latch section of the 38T gear is latched and fixed with the PPD or POD is ON when the power is turned on.
Page 40: Spf Section
7. SPF section A. Outline C. Operational descriptions The SPF (Single Path Feeder) is installed to the AL-2031/2041 as a Document set standard provision. It automatically copies up to 50 sheets of documents of a same SPID ON Document set sensor size.
Page 41: Spf Open/Close Detection (Book Document Detection)
D. SPF open/close detection (book document detection) SPF open/close detection (book document) detection is performed by detecting the interval between the reference lines on the white Mylar attached to the paper exit guide (document scanning section) by the scanner (CCD) and detecting the varied quantity. (Floating) (White Mylar) Reference line...
Page 42: Disassembly And Assembly
[8] DISASSEMBLY AND ASSEMBLY 2) Push up the lock pawls (2 positions) of the side cover, and remove the transfer charger. Before disassembly, be sure to disconnect the power cord for safety. Lock pawl rear 1. Do not disconnect or connect the connector and the harness while the machine is powered.
Page 43: Charger Wire Replacement
2) Clean the TC front guide and the TC holder with alcohol. Charger wire 3) Set the charger cleaner to the transfer unit, and move it recipro- cally a few times in the direction of the arrow shown in the figure below.
Page 44: Assembly Procedure
2) Remove the screws (4 pcs.), the harness, and the operation 3. Optical section panel unit. A. List Part name Ref. Copy lamp unit Copy lamp Lens unit B. Disassembly procedure 1) Remove four screws, and remove the rear cabinet and the rear cabinet cover.
Page 45 5) Remove five screws. Remove the operation unit, and discon- 13) Remove the screw, and remove the rod stopper. nect the connector. 14) Remove the rod. 6) Remove the right cabinet. 7) Remove the left cabinet. 8) Remove the screw, and remove the rear cover. 9) Remove the table glass.
Page 46: Assembly Procedure
C. Assembly procedure 4. Fusing section CCD core A. List 1) Insert the CCD-MCU harness into the CCD PWB of the carriage Part name Ref. unit. Thermistor 2) Attach the CCD-MCU harness to the duplex tape on the back PPD2 sensor surface of the carriage unit.
Page 47 4) Remove the screw and remove the resistor. 6) Remove the screw and remove the PPD2 sensor. Remove the screw and remove the U-turn guide. PPD2 sensor 7) Remove the plate spring on the right and remove the heater lamp. Note: Check to confirm that the fusing lower earth spring (A) does not extend over the fusing bearing (B) after tightening the screw.
Page 48 ：'10/Oct/20 9) Remove the spring, and remove the upper separation pawls (3 12) Remove the pressure roller, and the spring. pcs.). Note: Apply grease to the sections specified with an asterisk (*). Grease: "JFE552" UKOG-0235FCZZ Pressure roller 10) Remove the E-ring and remove the reverse gate. Heat roller disassembly (Continued from procedure 4).) 5) Remove screws, remove the fusing cover, and open the heat...
Page 49: Assembly Procedure
8) Remove two screws and remove the thermo unit. Note: The set temperature of the thermostat differs from that of the current model. Temperature AL-2021/2031/2041 230°C 5) Remove each connector and six screws, and remove the MCU PWB. (The shape of the MCU PWB differs depending on the model.)
Page 50 6) Remove the PWB insulation mylar and remove the paper trans- 8) Remove the pulleys on the both sides and remove the paper port detection sensor (POD). exit roller. 7) Remove two springs and open the intermediate frame unit. 9) Disengage the pawl, and remove the roller knob. 10) Disengage the pawl, and shift the pulley and the bearing.
Page 51 12) Remove the harness guide. 15) Remove five screws and the grounding wire, and remove the main drive unit. 13) Remove two screws and remove the toner motor. CAUTION:Attach the gears securely 16) Remove the parts as shown below, and remove the pressure release solenoid and the paper feed solenoid.
Page 52 ：'10/Oct/20 17) Remove four screws, and remove the paper guide unit. 19) Remove the screw, slide the left cabinet to the left to detach it. Remove each pawl, and remove the paper exit tray. 18) Remove four screws, and remove the LSU unit. 20) Remove two screws and remove the fusing connector.
Page 53: Assembly Procedure
22) Remove the screw and the E-ring, and remove the PS semi-cir- 25) Remove the screw and the connector, and remove the PPD1 cular earth plate and the PS roller unit. sensor PWB. 23) Remove the E-ring and remove the spring clutch from the PS roller unit.
Page 54: Manual Paper Feed Section
6. Manual paper feed section 3) Remove three screws and remove the multi paper feed upper frame. A. List Part name Ref. Manual transport roller Cassette detection switch Side door detection unit B. Disassembly procedure Multi unit 1) Remove the screw and remove the multi upper cover. 4) Remove two screws and remove the multi feed bracket unit from the multi paper feed upper frame.
Page 55: Assembly Procedure
5) Remove three E-rings and remove the manual paper feed roller 7) Cut the binding band and remove the multi paper feed solenoid. Multi paper feed solenoid 6) Remove the pick-up roller. C. Assembly procedure For assembly, reverse the disassembly procedure. D.
Page 56: Rear Frame Section
7. Rear frame section 4) Remove two screws and one harness, and remove the main motor. A. List Part name Ref. Scanner motor Main motor Exhaust fan motor Main PWB B. Disassembly procedure 1) Remove four screws, and remove the rear cabinet and the rear cabinet cover.
Page 57: Power Section
8. Power section C. Assembly procedure For assembly, reverse the disassembly procedure. A. List Part name Ref. 10. Reverse roller section Power PWB A. List B. Disassembly procedure Part name Ref. 1) Disconnect each connector. Reverse roller 2) Remove the screw, and remove the earth line. 3) Remove two screws, and remove the power PWB unit.
Page 58: Spf Section (Al-2031/2041)
11. SPF section (AL-2031/2041) 1) Remove the screw, and remove the harness. 2) Remove three screws. Part name Ref. 3) Disengage the pawl (4 positions). SPF motor 4) Remove the transport unit. Pick-up roller, paper feed roller Paper exit roller Set sensor, scan front sensor Transport roller (1) Rear cabinet disassembly...
Page 59: Pick-Up Roller, Paper Feed Roller
B. Pick-up roller, paper feed roller 1) Remove the pick-up roller. 2) Remove the gear. 1) Remove two gears. C. Paper exit roller 1) Remove four gears. 1) Open the upper door. 2) Remove two screws. 2) Remove two E-rings, and remove the spring, the arm, and the 3) Remove the frame.
Page 60: Set Sensor, Scan Front Sensor
D. Set sensor, scan front sensor 1) Remove the set sensor. 2) Remove the scan front sensor. 3) Disconnect the connectors. * When assembling, attach the blue harness to the marking B side of the sensor, and attach the orange harness to the opposite side sensor.
Page 61: Adjustments
[9] ADJUSTMENTS 1. Optical section A. Copy magnification ratio adjustment 5) Calculate the main scanning direction magnification ratio. Main scanning direction magnification ratio The copy magnification ratio must be adjusted in the main scan- Copy image dimensions ning direction and in the sub scanning direction. To adjust, use X 100 (%) Original dimension SIM 48-1.
Page 62: Image Position Adjustment
c. Adjustment procedure B. Image position adjustment 1) Set the scale on the document table as shown below. (Use a There are following eleven kinds of image position adjustments, long scale for precise adjustment.) which are made by laser control except for the image scan start position adjustment.
Page 63 2) Execute SIM 50-01 4) If the measurement value is out of the specified range, change the set value and repeat the adjustment procedure. 3) Set the print start position (AE lamp ON) (A), the lead edge void The default value is 50. amount (TEXT lamp ON) (B), and the scan start position (PHOTO lamp ON) (C) to 0, and make a copy of a scale at Note: The rear edge void cannot be checked with the first sheet...
Page 64: Copy Density Adjustment
KODAK display lamp GRAY SCALE D. Features of copy density adjustment Adjustment Exposure mode Sharp gray chart mode display lamp adjustment level For the copy density adjustment, the image data shift function pro- Auto mode Auto lamp ON "3" is slightly copied.
Page 65: High Voltage Adjustment
B. DV bias check Check the adjustment level (shown in the above table) of the Note: • A digital multi meter with internal resistance of 1GΩ must exposure test chart (Sharp Gray Scale). be use for correct check. Sharp Gray Scale adjustment level •...
Page 66: Adjusting Trailing Edge Void In Duplex Copy Mode
2) Set the test chart so that the scale is positioned as shown (Adjustment procedure) below, in the S-D mode and the D-S mode. (1) Paper trailing edge void quantity Scale (S-D mode) Scale (D-S mode) 1) Preparing test chart (Draw a scale at the rear end of one side of a sheet of A/4 white paper or letter paper) 2) Set the test chart on the document glass as shown below.
Page 67: Spf Scan Position Automatic Adjustment
5. SPF scan position automatic 6. SPF mode sub scanning direction adjustment magnification ratio adjustment Place a A4 paper (white chart) so that it covers the SPF scan glass Note: Before performing this adjustment, be sure to check that the and the OC glass together, and close the SPF.
Page 68: Automatic Black Level Correction
7. Automatic black level correction a. Cases when the adjustment is required 1) When the main PWB is replaced. 2) When the EEPROM in the main PWB is replaced. 3) When "U2" trouble occurs. 4) When repairing or replacing the optical section. b.
Page 69: Simulation, Trouble Codes
Scanner counter clear → → such as [0] [9], not as [0] [1]. SPF JAM total counter clear (excluding AL-2021) [START] key: Settlement Scanner mode counter clear <In case of simulations for print> Main motor operation check [START] key: Settlement / Print...
Page 70: Descriptions Of Various Simulations
(AL-2041 only) Duplex copy rear edge void adjustment (AL-2041 only) Resist quantity adjustment SPF scan position automatic adjustment (excluding AL-2021) Polygon motor check (HSYNC output check) Shading check Black level automatic correction Light quantity stabilization wait time setting Light quantity stabilization band setting Self print 4.
Page 71 Details of function/operation code code SPF Motor ON [Function] (excluding AL-2021) When [START] key is pressed, the motor rotates for 10sec at the speed corresponding to the set magnification ratio. [Operation] The operation is similar to simulation 1-01. Operation panel display...
Page 72 The total counter value is displayed. [Operation] The operation is similar to simulation 22-04. SPF counter display [Function] (excluding AL-2021) The SPF counter is displayed. [Operation] AL-2031/2041 The operation is similar to simulation 22-04. AL-2041 SIMULATION, TROUBLE CODES 10 - 4...
Page 73 [Function] The scanner counter is displayed. [Operation] The operation is similar to simulation 22-04. SPF JAM counter display [Function] (excluding AL-2021) The SPF JAM counter is displayed. [Operation] AL-2031/2041 The operation is similar to simulation 22-04. JAM total counter clear [Function] When [START] key is pressed, the JAM total counter is cleared to 0 and "000,000"...
Page 74 [Operation] The operation is similar to simulation 22-04. SPF JAM total counter clear [Function] (excluding AL-2021) When [START] key is pressed, the SPF JAM total counter value is cleared to 0, and "000,000" is displayed on the LCD/display. [Operation] AL-2031/2041 The operation is similar to simulation 22-04.
Page 75 Main Contents Details of function/operation code code Machine duplex setup [Function] (AL-2041 only) When this simulation is executed, the current set duplex is displayed. Enter the code number corresponding to the desired duplex and press [START] key to save the setting. Code number Duplex Duplex NO...
Page 76 Main Contents Details of function/operation code code Polygon motor OFF time [Function] setup (Time required for When this simulation is executed, the current setting is displayed. Enter the code number corre- turning OFF after completion sponding to the desired setting and press [START] key to save the setting. of printing) Code number Setting...
Page 77 ：'10/Oct/20 Main Contents Details of function/operation code code Side void setup [Function] When this simulation is executed, the currently set code of the side void quantity is displayed (initial display), and the set data are saved. (Setting range: 0 – 10, Default: 4 (= One side 2.0mm)) Code Setting...
Page 78 [Function] level adjustment When this simulation is executed, the current set value is displayed. When [START] key is (excluding AL-2021) pressed, the mirror base unit moves to the SPF scan position to acquire the OC cover float detection level. When the mirror base unit returns to the home position, the acquired value is displayed.
Page 79 Main Contents Details of function/operation code code Fusing temperature setting [Function] in multi copy For 20th sheet or later in multi copy, the fusing temperature is automatically changed from the temperature set with simulation 43-01 to the temperature set with this simulation. When this simulation is executed, the current set code number is displayed.
Page 80 Main Contents Details of function/operation code code Postcard size paper fusing [Function] temperature setting When the simulation is executed, the current set value is displayed. Press [UP/UP] key to switch the setting. Press [START] key to write into the EEPROM. The machine enters the sub code input standby state.
Page 81 Main Contents Details of function/operation code code Copy density adjustment [Function] (300dpi) Copy density is set for each mode. When this simulation is executed, the current set value is displayed in 2 digits (Default: 50). Change the set value and press [START] key to make a copy under the set value. When the set value is increased, the copy becomes darker.
Page 82 Main Contents Details of function/operation code code Image contrast adjustment [Function] (300dpi) Contrast is set for each mode. When this simulation is executed, the current set value is displayed in 2 digits (Default: 50). Change the set value and press [START] key to make a copy under the set value. When the set value is increased, the contrast becomes higher.
Page 83 SPF exposure correction [Function] (excluding AL-2021) Used to adjust the exposure correction amount in the SPF mode. The adjustment is made by adjusting Vref voltage variation for the OC mode. When this simulation is executed, the current set value is displayed in 2 digits (Default: 50).
Page 84 Main Contents Details of function/operation code code Image sharpness [Function] adjustment Used to adjust sharpening/blurring of image in each mode. Image quality Setting No Remark Blurring Standard Default Sharpening When this simulation is executed, warm-up and shading are performed and the current set value is displayed.
Page 85 Used to display the current SPF mode sub scan direction magnification ratio on the LCD/dis- in copying play. (excluding AL-2021) When [START] key is pressed, the entered data is acquired and saved into the EEPROM, and a copy is made. (When the set value is increased by 1, the magnification ratio is increased by 0.1%.)
Page 86 Main Contents Details of function/operation code code Lead edge image position [Function] Used to adjust the copy image position and the lead edge void amount on copy paper. The adjustment is made by adjusting the image scan start position at 100% and the print start posi- tion (resist roller ON timing).
Page 87 [Function] adjustment (SPF) Used to adjust the SPF copy lead edge. (excluding AL-2021) When the adjustment value of the document scan position adjustment is increased by 1, the scan start timing is advanced by 0.1mm. The print result is shifted to the opposite direction of the scan start position.
Page 88 Main Contents Details of function/operation code code Memory reverse position [Function] adjustment in duplex copy When this simulation is executed, the current set correction value is displayed. (AL-2041 only) Enter the correction value and press [START] key to save the entered correction value. (Correc- tion value range;...
Page 89 Place a A4 paper (white chart) so that it covers the SPF scan glass and the OC glass together, (excluding AL-2021) and close the SPF. When this simulation is executed, the current adjustment value is displayed as the initial display.
Page 90 Main Contents Details of function/operation code code Black level automatic [Function] correction Used to acquire the black level target value used for the black level adjustment of white balance. When this simulation is executed, the current correction value is displayed in 3 digits of 12bit hexadecimal number.
Page 91 Main Contents Details of function/operation code code Self print [Function] The status of the optical section is ignored and printing of one page is made. Also when the print command is received from the host, printing is made. When this simulation is executed, warm-up is performed and the ready lamp is lighted. (Since, however, the scanner is disabled, initializing is not made.) Enter the code number and press [START] key to start paper feed from the selected cassette and print in the selected pattern.
Page 92: Trouble Codes
5. Trouble codes Main Details of trouble code code A. Trouble codes list Content Shading trouble (White correction) Detail The CCD white scan level is abnormal when Main Details of trouble the shading. code code Cause Improper connection of the CCD unit flat Image data error cable Image data decode error...
Page 93 Main Main Details of trouble Details of trouble code code code code Content Toner cartridge CRUM error Content Heat roller low temperature detection Detail Detail 1) When the target temperature (165°C) is not reached in 55 sec after starting Cause Toner cartridge (CRUM) trouble.
Page 94 Main Main Details of trouble Details of trouble code code code code Content Scanner return trouble Content Polygon motor lock detection Detail When the mirror base is returned for the Detail The lock signal (specified rpm signal) does specified time (6 sec) in mirror initializing not return within a certain time (about 20 after turning on the power, the mirror home sec) from starting the polygon motor...
Page 95: User Program
[11] USER PROGRAM The user programs allow the parameters of certain functions to be 5) Press the start ( ) key. The right-hand number in the display set, changed, or cancelled as desired. will be steadily lit and the entered value will be stored. Note: To change the setting or to set another mode, press the 1.
Page 96: Checking The Toner Level
[12] CHECKING THE TONER LEVEL The toner level is indicated by a 6-level display. Use it as a guideline for replacing the toner cartridge. 1) Hold down the light ( ) key until the alarm indicators ) blink. The display will show "- -". 2) Hold down the Copy ratio display (%) key for more than 5 sec- onds.
Page 97: Electrical Section
[13] ELECTRICAL SECTION 1. Block diagram A. Overall block diagram AL-2041 ELECTRICAL SECTION 13 - 1...
Page 98: Actual Wiring Diagram
2. Actual wiring diagram A. MCU PWB AL-2041 ELECTRICAL SECTION 13 - 2...
Page 99: Spf Unit
B. SPF unit chosen by a model chosen by a model DHAI-0532QSP1 SPF harness (A-JAG) 179228-6 292132-6 24VSPFMT COMA 24VSPFMT COMB SPMT_0 SPMT SPMT SPMT_2 SPMT_1 SPMT_3 SPID DGND LEDSPID 179228-3 292250-3 SPPD SPID SPID SPID DGND DGND LEDSPPD LEDSPID B12B-PH-K-S PHR-12 179228-3 292250-3 SPPD...
Page 100: Signal Name List
3. Signal name list Signal name Name Function/Operation Section (ADCLK) AFE control signal Scanner unit section (AFE_DB0) Image scan data Scanner unit section (AFE_DB1) Image scan data Scanner unit section (AFE_DB2) Image scan data Scanner unit section (AFE_DB3) Image scan data Scanner unit section (AFE_DB4) Image scan data...
Page 101 Signal name Name Function/Operation Section Start button control Operation section /RRS 1st transport solenoid Paper transport section RTH_IN Thermistor Fusing section thermistor temperature detection Fusing section SELIN1 Select signal 1 HC151 select signal Operation section SELIN2 Select signal 2 HC151 select signal Operation section SELIN3 Select signal 3...
Page 102: Circuit Diagram
[14] CIRCUIT DIAGRAM 1. MCU PWB AL-2041 CIRCUIT DIAGRAM 14 - 1...
Page 103 AL-2041 CIRCUIT DIAGRAM 14 - 2...
Page 104 AL-2041 CIRCUIT DIAGRAM 14 - 3...
Page 105 AL-2041 CIRCUIT DIAGRAM 14 - 4...
Page 106 AL-2041 CIRCUIT DIAGRAM 14 - 5...
Page 107 AL-2041 CIRCUIT DIAGRAM 14 - 6...
Page 108 AL-2041 CIRCUIT DIAGRAM 14 - 7...
Page 109 AL-2041 CIRCUIT DIAGRAM 14 - 8...
Page 110 AL-2041 CIRCUIT DIAGRAM 14 - 9...
Page 111 AL-2041 CIRCUIT DIAGRAM 14 - 10...
Page 112 AL-2041 CIRCUIT DIAGRAM 14 - 11...
Page 113 AL-2041 CIRCUIT DIAGRAM 14 - 12...
Page 114 AL-2041 CIRCUIT DIAGRAM 14 - 13...
Page 115 AL-2041 CIRCUIT DIAGRAM 14 - 14...
Page 116: Ope Pwb
2. OPE PWB AL-2041 CIRCUIT DIAGRAM 14 - 15...
Page 117 AL-2041 CIRCUIT DIAGRAM 14 - 16...
Page 118 LEAD-FREE SOLDER The PWB’s of this model employs lead-free solder. The “LF” marks indicated on the PWB’s and the Service Manual mean “Lead-Free” solder. The alphabet following the LF mark shows the kind of lead-free solder. Example: <Solder composition code of lead-free solder> Solder composition Solder composition code Solder composition...
Page 119 CAUTION FOR BATTERY REPLACEMENT (Danish) ADVARSEL ! Lithiumbatteri – Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandoren. (English) Caution ! Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.
Page 120 United States and other countries. • IBM, PC/AT, and Power PC are trademarks of International Business Machines Corporation. • Sharpdesk is a trademark of Sharp Corporation. • All other trademarks and copyrights are the property of their respective owners. SHARP CORPORATION...

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Al-2031 Al-2041

Sharp AL-2021 Service Manual

[1] General

Specifications

[3] Consumable Parts

External Views and Internal Structures

Unpacking and Installation

Copy Process

Operational Descriptions

Disassembly and Assembly

Adjustments

Simulation, Trouble Codes

User Program

Checking the Toner Level

Electrical Section

Circuit Diagram

Quick Links

SERVICE MANUAL

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Summary of Contents for Sharp AL-2021

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Table of Contents