Sharp AL2020 Service Manual
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Sharp AL2020 Service Manual

Digital multifunctional system
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(AL-2040)
[ 1 ] GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
[ 3 ] CONSUMABLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
[ 4 ] EXTERNAL VIEWS AND INTERNAL STRUCTURES . . . . . . . . . 4 - 1
[ 5 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
[ 6 ] COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 1
[ 7 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
[ 8 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
[ 9 ] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1
[10] SIMULATION, TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . 10 - 1
[11] USER PROGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - 1
[12] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 1
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
SERVICE MANUAL
DIGITAL MULTIFUNCTIONAL
SYSTEM
MODEL
CONTENTS
SHARP CORPORATION
CODE: 00ZAL2040/S1E
AL-2020
AL-2040
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

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Summary of Contents for Sharp AL2020

  • Page 1 ” are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set. This document has been published to be used SHARP CORPORATION for after sales service only. The contents are subject to change without notice.
  • Page 2 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 At the production line, the output power Caution of the scanner unit is adjusted to 0.18 This product contains a low power laser MILLI-WATT PLUS 20 PCTS and is device. To ensure continued safety do not maintained constant by the operation of remove any cover or attempt to gain access the Automatic Power Control (APC).

  • Page 4: Table Of Contents

    CONTENTS GENERAL 3. Optical section ........8-3 A.

  • Page 5: Major Functions

    [1] GENERAL 1. Major functions Configurations Item Color 2 Tray SPF R-SPF Duplex Shifter USB RJ45 (A4) (A4) Scanner printer printer SORT Model AL-2020 20CPM 15PPM (2.0) AL-2040 20CPM 15PPM (2.0) (print only) Descriptions of items CPM: Copy speed (Copies Per Minute) PPM: Print speed (Print Per Minute) SB/MB:...

  • Page 6: Specifications

    [2] SPECIFICATIONS 1. Basic Specifications Item Type Desktop Copy system Dry, electrostatic Segment (class) Digital personal copier Copier dimensions AL-2020 518mm (W) x 445mm (D) x 298mm (H) (20-1/2" (W) x 17-5/8" (D) x 11-3/4" (H)) AL-2040 518mm (W) x 445mm (D) x 358mm (H) (20-1/2" (W) x 17-5/8" (D) x 14-1/8" (H)) Weight (Approximately) AL-2020 16.2Kg (35.6 lbs.)

  • Page 7: Copy Performance

    Section, item Details Image forming Photoconductor Type OPC (30ø) Life Charger Charging system Saw-tooth charging with a grid, / (-) scorotron discharge Transfer system (+) DC corotron system Separation system (-) DC corotron system Developing Developing system Dry, 2-component magnetic brush development system Cleaning Cleaning system...

  • Page 8: Gdi Printer

    4. GDI Printer Print speed Max. 20ppm (excluding bypass tray, paper size A4, 8.5" x 11") (Variable depending on the PC performance) Duplex Memory 16MB Interface USB 2.0 (Full speed) / (RJ45 (10Base-T) AL-2040 only) Network Built-in NIC (AL-2040 only) Emulation Resolution 600dpi *1...

  • Page 9: Consumable Parts

    [3] CONSUMABLE PARTS 1. Supply system table Name Content Life Product name Package Develop cartridge (Black) x 1 Toner/developer cartridge x 1 AL-110DC (Toner: Net weight 124g) (Developer: Net weight 180g) (5% document) Drum cartridge Drum cartridge AL-100DR 2. Environmental The environmental conditions for assuring the copy quality and the machine operations are as follows: (1) Normal operating condition (4) Supply storage condition...

  • Page 10: Production Control Number (Lot No.) Identification

    3. Production control number (lot No.) identification <Developing cartridge> Production month Production day Destination code (Dealer, distributor, OEM, etc.) Production place (SOCC: Fixed to B.) End digit of year Version No. ∗ Destination Division EX Destination A same pack Production control B same pack label attachment position Option Destination...

  • Page 11: External Views And Internal Structures

    [4] EXTERNAL VIEWS AND INTERNAL STRUCTURES 1. Appearance SPF (AL-2040) Original cover (AL-2020) Original guide Document feeder cover Interface Peep hole Interface Exit area Document feeder tray LAN connector USB connector (AL-2040 only) Document glass Operation panel Front cover Paper tray Multi-bypass tray Side cover Side cover open button...

  • Page 12: Operation Panel

    3. Operation panel 4 5 6 14 15 Original to copy key and indicators Exposure mode selector key and indicators Use to sequentially select the exposure modes: AUTO, Two-sided copies from one-sided originals. MANUAL or PHOTO. Turn on Long Edge or Turn on Short Edge Selected mode is shown by a lit indicator.
  • Page 13 ) key is pressed during a print job, the scan job will be stored. • When scanning an original that has been placed in the SPF, only one original can be placed unless you are using Sharp- desk. 1) Press the SCAN ( ) key.

  • Page 14: Motors And Solenoids

    4. Motors and solenoids Part 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

    5. Sensors and switches Name Signal Type Function 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 "L"...

  • Page 16: Pwb Unit

    6. PWB unit Name Function 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

    7. Cross sectional view Part name Function and 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

    4. Unpacking 6. Installing the TD cartridge Be sure to hold the handles on both sides of the unit to unpack the 1) Open the multi-bypass tray, and then open the side cover. unit and carry it to the installation location. 2) Remove the CAUTION tape from the front cover and remove the two protective pins from the fusing unit by pulling the strings upward one at a time.

  • Page 20: Loading Paper

    6) Gently push the paper tray back into the unit. 7. Loading paper 8. Power to copier 1) Raise the handle of the paper tray and pull the paper tray out until it stops. Ensure that the power switch of the unit is in the OFF position. Plug the other end of the power cord into the nearest outlet.

  • Page 21: Connecting The Interface Cable

    Pin configuration *2: Although it is possible to install Button Manager and Sharp- desk on Windows 98/Me/2000/XP/Vista, neither Button Man- The pin numbers and signal names are listed in the following table.

  • Page 22: Moving

    12. Moving Moving instructions When moving the unit, follow the procedure below. Note: When moving this unit, be sure to remove the TD cartridge in advance. 1) Turn the power switch off and remove the power cord from the outlet. 2) Open the side cover and front cover, in that order.

  • Page 23: 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 24: 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 25 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 neg- paper by applying a positive charge from the transfer corona to the ative through friction with the carrier.
  • Page 26 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 27: Operational Descriptions

    [7] OPERATIONAL DESCRIPTIONS 1. Outline of operation The outline of operation is described referring to the basic configuration. (Basic configuration) Scanner section Operation section Network (print only) NIC PWB MCU (Main control/image process section) LSU (Laser unit) Laser diode, Polygon mirror lens Laser beam Paper exit Fusing section...

  • Page 28: Scanner Section

    2. Scanner section A. Scanner unit Spectral sensitivity characteristics (Standard characteristics) The scanner unit in the digital copier scans images. It is composed of the optical unit and the drive unit. The optical unit performs scanning in the main scan direction with the light receiv- ing elements (color CCD).

  • Page 29: 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 30: General Description

    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 General block diagram (cross section) is set to 100°C. Thermal fuse Separator pawl 3) The self-check function comes active when one of the follow- ing malfunctions occurs, and an "H"...
  • Page 31 (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 paper feed clutch sleeve, and the paper feed latch in the initial (PFS) turns on so that the clutch sleeve projection comes into...
  • Page 32 (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 33: 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 34: Operational Descriptions

    C. Operational descriptions Document set SPID ON Document set sensor Document feed unit lamp ON PSW ON Copy start The scanner is shifted MRMT rotation to the exposure position. (Copier side) (SPF side) MM rotation SPFM rotation SPF motor rotation Main motor rotation Paper feed CPFS ON...

  • Page 35: Disassembly And Assembly

    [8] DISASSEMBLY AND ASSEMBLY 2) Push up the lock pawls (2 positions) of the side cover, and remove the transfer charger. Lock pawl rear Before disassembly, be sure to disconnect the power cord for safety. 1. Do not disconnect or connect the connector and the harness while the machine is powered.

  • Page 36: Charger Wire Replacement

    2. Operation panel section 2) Set the charger cleaner to the transfer unit, and move it recip- rocally a few times in the direction of the arrow shown in the A. List figure below. Part name Ref. Operation panel unit Operation PWB B.

  • Page 37: Assembly Procedure

    3) Remove four screws, and remove the operation cabinet. 2) Remove two screws, and remove the earth wire. 4) Remove four screws, and remove the operation PWB. 3) Disconnect the connector. 4) Remove the SPF unit. 3) 3) 5) Remove five screws. Remove the operation unit, and discon- nect the connector.

  • Page 38: Assembly Procedure

    C. Assembly procedure 10) Move the carriage to the position indicated on the figure. 11) Loosen the screw which is fixing the tension plate. CCD core 12) Move the tension plate in the arrow direction to release the 1) Pass the core through the CCD-MCU harness. tension, and remove the belt.

  • Page 39: Fusing Section

    4. Fusing section 4) Remove the screw and remove the U-turn guide. A. List Part name Ref. Thermistor PPD2 sensor Heater lamp Pressure roller Heat roller B. Disassembly procedure 1) Remove the connectors (3 pcs.) of the rear cabinet. 2) Open the side cover, remove two screws, and remove the fus- ing unit.
  • Page 40 7) Remove the plate spring on the right and remove the heater 10) Remove the spring, and remove the lower separation pawls (4 lamp. pcs.). 11) Remove the pressure release levers on the right and the left sides. Heater lamp 8) Remove the spring, and remove the upper separation pawls (3 pcs.).

  • Page 41: Assembly Procedure

    Heat roller disassembly (Continued from procedure (4).) 5) Remove screws, remove the fusing cover, and open the heat roller section. 6) Remove the C-ring and the fusing bearing, and remove the heat roller. Heat roller C. Assembly procedure For assembly, reverse the disassembly procedure. 5.
  • Page 42 5) Remove each connector and four screws, and remove the 7) Remove two screws and remove the toner motor. MCU PWB. 8) Remove two springs and open the intermediate frame unit. 6) Remove the PWB insulation mylar and remove the paper transport detection sensor (PPD2).
  • Page 43 9) Remove the pulleys on the both sides and remove the paper 11) Release the belt pulley lock and remove the belt pulley bear- exit roller. ing. 12) Remove the paper exit roller. 10) Pull out the paper exit roller knob and remove the belt. 13) Remove the harness guide.
  • Page 44 14) Remove five screws and remove the main drive plate and the 16) Remove four screws, and remove the paper guide unit. belt. 17) Remove four screws, and remove the LSU unit. CAUTION:Attach the gears securely 15) Remove the parts as shown below, and remove the pressure release solenoid and the paper feed solenoid.
  • Page 45 18) Remove each pawl, and remove the paper exit tray. 21) Remove the screw and the E-ring, and remove the PS semi- circular earth plate and the PS roller unit. 22) Remove the E-ring and remove the spring clutch from the PS roller unit.

  • Page 46: Assembly Procedure

    6. Manual paper feed section 24) Remove the screw and the connector, and remove the PPD1 sensor PWB. A. List Part name Ref. Manual transport roller Cassette detection switch PPD1 sensor PWB Side door detection unit B. Disassembly procedure Multi unit 1) Remove the screw and remove the multi upper cover.
  • Page 47 2) Remove the screw and remove the side door detection unit. 4) Remove two screws and remove the multi feed bracket unit from the multi paper feed upper frame. Back Wire treatment 3) Remove three screws and remove the multi paper feed upper frame.

  • Page 48: Assembly Procedure

    D. Pressure plate holder attachment 6) Remove the pick-up roller. 1) Attach the pressure plate holder so that the resin section is not covered with the seal M1-N. Seal M1-N Pressure plate holder Attachment reference 7) Cut the binding band and remove the multi paper feed sole- noid.

  • Page 49: Assembly Procedure

    2) Disconnect the connector. 6) Disconnect the connector. 3) Remove two screws, and remove the scanner motor. 7) Remove the two screws, and remove the NIC PWB. 8) Disconnect the connector. 9) Remove the three screws, and remove the NIC PWB unit. 4) Remove two screws and one harness, and remove the main motor.

  • Page 50: Power Section

    8 Power section A. SPF motor 1) Remove the screw. A. List 2) Disengage the pawl (3 positions). Part name Ref. 3) Remove the rear cabinet. Power PWB B. Disassembly procedure 1) Disconnect each connector. 2) Remove the screw, and remove the earth line. 3) Remove two screws, and remove the power PWB unit.

  • Page 51: Pick-Up Roller, Paper Feed Roller

    1) Remove two screws. 1) Remove the shaft. 2) Remove the SPF motor. 2) Remove the paper feed roller. 3) Remove the bearing and the spring. B. Pick-up roller, paper feed roller 1) Remove two gears. 1) Remove the pick-up roller. 2) Remove the gear.

  • Page 52: 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 oppo- site side sensor.

  • Page 53: Adjustments

    [9] ADJUSTMENTS 5) Calculate the main scanning direction magnification ratio. Main scanning direction magnification ratio Copy image dimensions 1. Optical section X 100 (%) Original dimension A. Copy magnification ratio adjustment (When a 100mm scale is used as the original.) Original (Scale) The copy magnification ratio must be adjusted in the main scan- HARDENED...

  • Page 54: Image Position Adjustment

    B. Image position adjustment c. Adjustment procedure 1) Set the scale on the document table as shown below. (Use a There are following five 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 55 (1) Lead edge adjustment (2) Image rear edge void amount adjustment 1) Set a scale to the center of the paper lead edge guide as 1) Set a scale to the rear edge section of A4 or 11" x 8-1/2" paper shown below, and cover it with B4 or 8-1/2"...

  • Page 56: Copy Density Adjustment

    Test chart comparison table 3) Make a copy and check that the copied center line is properly positioned. UKOG- The standard value is 0 ± 2mm from the paper center. 0162FCZZ DENSITY 2.0mm or less (Copy A) Copy image UKOG- Copy paper 0089CSZZ Shift...

  • Page 57: High Voltage Adjustment

    Auto T/S mode Auto lamp/Photo lamp ON "3" is slightly copied. 3) Make a copy. Check the adjustment level (shown in the above table) of the exposure test chart (Sharp Gray Scale). Sharp Gray Scale adjustment level VRG1 Non toner...

  • Page 58: Duplex Adjustment

    4. Duplex adjustment A. Adjusting the paper reverse position in memory for duplex copying This step adjusts the front surface printing (odd-number pages of a document set) in the S-D mode copying. That is, it covers the adjustment of the second surface printing mode (image loss at the front edge of an image) in which image data is once stored in memory.

  • Page 59: Spf Scan Position Automatic Adjustment

    4) Execute SIM 50-19 to turn on the TEXT lamp and make the The density select key is used to select the mode. printing mode in OC-D mode. Mode Default Make a copy of the test chart to check the void area of the SPF scan position auto AE mode lamp scale on the image.

  • Page 60: Automatic Black Level Correction

    <Adjustment specification> Spec Setting Adjustment mode Set value value range Sub scanning At normal: 48-5 Add 1: 1 – 99 direction ±1.0% 0.1% increase magnification Reduce 1: ratio (SPF mode) 0.1% decrease 7. Automatic black level correction a. Cases when the adjustment is required 1) When the main PWB is replaced.

  • Page 61: Simulation, Trouble Codes

    [10] SIMULATION, TROUBLE CODES 1. Entering the simulation mode To enter the serviceman simulation mode, press the keys as follows: Clear → Density select → Clear→ Density select To cancel the simulation mode, press the clear key. Flow chart of entering the simulation mode Start Is there a sub Press the COPY key.

  • Page 62: List Of Simulations

    2. List of simulations Kind of Operation main code code 26 Various setup Memory capacity check Kind of Operation Polygon motor OFF time setup main code code (Time required for turning OFF after 01 Optical system Mirror scan operation completion of printing) Mirror home position sensor (MHPS) Transfer ON timing control setup status display...

  • Page 63: Contents Of Simulations

    3. Contents of simulations Input method: Clear key → Exposure Select key → Clear key → Exposure Select key Main Content code code Mirror scan operation (Operation/Procedure) 1. When this simulation is executed, the mirror home position is detected. Sensor name Display lamp Mirror home position sensor OPC drum cartridge replacement lamp...
  • Page 64 Main Content code code Paper feed solenoid ON (Operation/Procedure) When the START key is pressed, the paper feed solenoid selected by the tray select key repeats ON (500ms) and OFF (500ms) 20 times. Resist solenoid ON (Operation/Procedure) When the START key is pressed, the resist solenoid (RRS) repeats ON (500ms) and OFF (500ms) 20 times. Warm-up display and aging with jam (Operation/Procedure) 1.
  • Page 65 Main Content code code JAM total counter display The display method is the same as the total count value display. <Display example: 12345> 012 → Blank → 345 → Blank → 012 0.7s 0.3s 0.7s 1.0s 0.7s Total counter display The total count value is displayed in 3 digits X 2 times repeatedly.
  • Page 66 Main Content code code Second cassette setup (Operation/Procedure) 1. When this simulation is executed, the currently set code number of the second cassette is displayed. 2. Enter the code number and press the start key. The setting is changed. Code number Second cassette Without second cassette With second cassette...
  • Page 67 Main Content code code Transfer ON timing control setup (Operation/Procedure) 1. When this simulation is executed, the currently set code number is displayed. 2. Enter the code number and press the START key, and the setting will be changed. (For any number different from the following ones, the default time is automatically set.) Code number Setting...
  • Page 68 Main Content code code OC cover float detection level adjustment <SPF model only> When this simulation is executed, the current set value is displayed. When ENTER/START key is pressed, the mirror base unit moves to the SPF scanning position and the OC cover float detection level (number of pixels between black lines) is acquired and displayed.
  • Page 69 Main Content code code Fusing temperature setup in duplex copy In duplex copy, this setup value is added to the fusing temperature of single copy. When this simulation is executed, the current setup of the code number is displayed. Enter the code number and press the PRINT switch to enable the setup. Code number Temperature shift (°C) ±0°C * Default...
  • Page 70 Main Content code code Postcard size paper fusing control cycle sync setting When this simulation is executed, the currently set code number is displayed. Change the setting with UP/UP key, and press START key to write the setting to the EEPROM. (Setting range: 0 – 20, default: ∗...
  • Page 71 Main Content code code Image contrast adjustment (300dpi) Used to set the image contrast in each mode. (Operating procedure) When this simulation is executed, warm-up and shading operations are performed and the current setup value is displayed in two digits. (Default: 50) Change the setup value with the copy quantity keys.
  • Page 72 Main Content code code Image contrast adjustment (600dpi) Used to set the contrast in each mode. (Operation/Procedure) When this simulation is executed, the machine performs warm-up and shading, and the current setup value is displayed in two digits. (Default: 50) Use the copy quantity keys to change the setup value, and press the PRINT switch to make a copy with the new setup.
  • Page 73 Main Content code code Copier color reproduction setup Used to set color reproduction for each mode. Colors which are easily copied or which are not easily copied are selected. Setup value Easy-to-copy colors Difficult-to-copy colors Purple/Blue/Red Yellow/Green/Light blue Light blue/Green/Blue Purple/Red/Yellow Yellow/Red/Green Blue/Light blue/Purple...
  • Page 74 Main Content code code Lead edge image position Used to adjust the copy image position and the lead edge void quantity on the copy paper. The adjustment is made by adjusting the image scan start position and the print start position (resist roller ON timing) at 100%. (Operating procedure) When this simulation is executed, the current setup value is displayed the current setup value is displayed in two digits.
  • Page 75 Main Content code code Document off-center adjustment The document scan off-center adjustment is performed. The adjustment mode is changed over with the copy mode select key. (Adjustment range: 1 – 99, Default: 50) When the adjustment value is increased, the print result is shifted to the left. Mode Lamp ON Default...
  • Page 76 Main Content code code SPF scan position automatic adjustment <SPF model only> Place three sheets of white paper so that they cover the SPF scan glass and the OC glass, and execute the simulation with the OC cover open, the mirror unit scans from the home position to the SPF scan position to identify the SPF glass cover edge position by the difference in the CCD output levels of the SPF glass cover edge and the OC side document glass.

  • Page 77: Trouble Codes

    Main Content code code Self print Print of one page is made regardless of the status of the optical system. (Operating procedure) When this simulation is executed, warm-up is performed and the ready lamp is lighted. Enter the code number with the 10-key, and select the cassette with the cassette select key and press the PRINT switch, and paper feed operation will be made from the selected cassette and printing of the selected pattern will be made.
  • Page 78 Main Main Details of trouble Details of trouble code code code code Content Shading trouble (White correction) Content Heat roller high temperature detection Detail The CCD white scan level is abnormal Detail The fusing temperature exceeds 240°C. when the shading. Cause Thermistor abnormality Cause...
  • Page 79 Main Main Details of trouble Details of trouble code code code code Content Feeding is not completed within the Content Main motor lock detection specified time after starting feeding. (The Detail When the main motor encoder pulse is not scan head locking switch is locked) detected for 100 msec.

  • Page 80: User Programs

    [11] USER PROGRAMS 3) To enter the toner save mode, press the light ( ) key. The light and dark indicator marked "1" will light up, indicating the toner save mode is selected. The conditions of factory setting can be changed according to the use conditions.
  • Page 81 Program Mode Parameters *1 → Large (A4 width/ Copy effective paper width LETTER), 2 → Small (B5R setting function (Bypass tray) width/INVOICE) *1 → Large (A4 width/ Copy effective paper width LETTER), 2 → Small (B5R setting function (Tray) width/INVOICE) *1 →...

  • Page 82: Electrical Section

    [12] ELECTRICAL SECTION 1. Block diagram A. Overall block diagram AL-2040 ELECTRICAL SECTION 12 - 1...

  • Page 83: Actual Wiring Diagram

    2. Actual wiring diagram A. MCU PWB (1/3) AL-2040 ELECTRICAL SECTION 12 - 2...
  • Page 84 B. SPF unit (AL-2040) (2/3) CN24 DHAI-0532QSP1 24VSPFMT COMA 24VSPFMT COMB SPMT_0 SPMT SPMT_2 SPMT_1 SPMT_3 SPID DGND LEDSPID SPPD SPID SPID DGND DGND LEDSPPD LEDSPID B12B-PH-K-S SPPD DGND SPPD LEDSPPD SPF UNIT C. NIC PWB (AL-2040) (3/3) DHAI-0518QSPZ CN39 D-GND D-GND DIR3...

  • Page 85: Signal Name List

    3. Signal name list Signal name Name Function/Operation Section LEDPPD2 PPD2 sensor power Fusing section PPD2 PPD2 sensor Paper transport detection Fusing section RTH_IN Thermistor Fusing section thermistor temperature detection Fusing section VFMOUT Fusing fan Fan drive signal Optical section FANLK Fusing fan Fan lock detection signal...
  • Page 86 Signal name Name Function/Operation Section MHPS MHPS sensor Carriage HP detection Optical section (AFE_DB5) Image scan data Scanner unit section (AFE_DB6) Image scan data Scanner unit section (AFE_DB4) Image scan data Scanner unit section (AFE_DB3) Image scan data Scanner unit section (AFE_DB2) Image scan data Scanner unit section...
  • Page 87 Memo...
  • Page 88 Memo...
  • Page 89 Memo...
  • Page 90 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 91 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 92 States and other countries. • IBM, PC/AT, and PowerPC 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 Digital Document System Group...

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