This document has been published to be used forafter sales service only.The contents are subject to change without notice.SHARP CORPORATIONDIGITAL COP

AL-1551 CONSUMABLE PARTS 3-1[3] CONSUMABLE PARTS1. Supply system table Common to all destinations2. EnvironmentalThe environmental conditions for assu

AL-1551 ELECTRICAL SECTION 12-114. Heater lamp control circuitA. OutlineThe heater lamp control circuit detects the heat roller surface temperature an

AL-1551 ELECTRICAL SECTION 12-12(1) High temperature protect circuit in case of CPU hung upFor IC119 3pin (reference voltage), +5V is divided by the r

AL-1551 ELECTRICAL SECTION 12-138. Mirror motor circuitThe mirror motor is a stepping motor. Its driver is IC113 constant-current chopper control IC (

AL-1551 ELECTRICAL SECTION 12-1410.Power circuit block diagramA. Block diagramThe power circuit is composed of the main section, the high voltage circ

AL-1551 ELECTRICAL SECTION 12-15B. Circuit descriptions(1) Main sectiona. Noise filter circuitThe noise filter circuit of the DC power is composed of

AL-1551 ELECTRICAL SECTION 12-16d. Rectifying/smoothing circuit on the secondary sideThe high frequency pulse generated by the invertor circuit is dro

AL-1551 ELECTRICAL SECTION 12-1711.CL invertor PWB (circuit)A. Circuit descriptionThe Two transistors connected in series to the transformer are switc

AL-1551 ELECTRICAL SECTION 12-1813.Operation sectionA. OutlineThe operation circuit is composed of the key matrix circuit and the display matrix circu

AL-1551 CIRCUIT DIAGRAM 13-1[13]CIRCUIT DIAGRAMAABBCCDDEE4 43 32 21 1MCU 1. CPU SECTION (OC/SPF/RSPF/Duplex Models)C35118pC35218pX101AT-51 19.6608MHzC

AL-1551 CIRCUIT DIAGRAM 13-2AABBCCDDEE4 43 32 21 1MCU 2. INPUT SECTION (OC/SPF/RSPF/Duplex Models)R32620KJR32720KJR31620KJR25020KJR25810KJC4031000pC40

AL-1551 CONSUMABLE PARTS 3-23. Production control number(lot No.) identification<Developing cartridge>* Destination<Drum cartridge>The lab

AL-1551 CIRCUIT DIAGRAM 13-3AABBCCDDEE4 43 32 21 1MCU 3. OUTPUT SECTION 1 (OC/SPF/RSPF/Duplex Models)R318150J1/4WR224150J1/4WR222220J1/4WC379C11147u 3

AL-1551 CIRCUIT DIAGRAM 13-4AABBCCDDEE4 43 32 21 1MCU 4. OUTPUT SECTION 2 (OC/SPF/RSPF/Duplex Models)IC109TD62503FI11I22I33I44I55I66I77G8O116O215O314O

AL-1551 CIRCUIT DIAGRAM 13-5AABBCCDDEE4 43 32 21 1MCU 5. ASIC SECTION (OC/SPF/RSPF/Duplex Models)IC208M66236FPCLK IN1TEST12TEST23TEST315TR13GND5-CKO/2

AL-1551 CIRCUIT DIAGRAM 13-6AABBCCDDEE4 43 32 21 1MCU 6. CONNECTOR SECTION / POWER SECTION (OC/SPF/RSPF/Duplex Models)CN120B5B-PH-K-S12345CN104B3B-P

AL-1551 CIRCUIT DIAGRAM 13-7AABBCCDDEE4 43 32 21 1MCU 7. CONNECTOR SECTION 2(OC/SPF/RSPF/Duplex Models)CN115B05B-XASK-112345CN123B24B-PHDSS-B135791113

AL-1551 CIRCUIT DIAGRAM 13-8OPU

AL-1551 CIRCUIT DIAGRAM 13-9GDI PWB

AL-1551 CIRCUIT DIAGRAM 13-10GDI MEMORY PWB (6MB)

AL-1551 CIRCUIT DIAGRAM 13-11POWER SUPPLY (120V/127V)

AL-1551 CIRCUIT DIAGRAM 13-12POWER SUPPLY (200V Series)

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-1[4] EXTERNAL VIEWS AND INTERNAL STRUCTURES1. Appearance*1 SPF only *2 RSPF only2. Internal1 Origina

AL-1551 CIRCUIT DIAGRAM 13-1311AA/H SYNCPKYEYEBLGY7 3.3V410 /PSOFFD-GND183.3VGY2512/PSOFFD-GNDBL24V1LBBIAS1PLRDCN654/MCBR/TC2PKGRIDL34321DV unSCL24SDA

AL-1551 CIRCUIT DIAGRAM 13-14AA11 GDI/USB PWB/INITMDATA3MAD3PARAAD63.3VMAD29375V1810MDATA0MDATA1422MDATA27/AUTOFDMDATA74GDIMEMORYPWB10PARAAD53.3V8PE28

AL-1551 CIRCUIT DIAGRAM 13-1511223344EEDDCCBBAABLBRGYGYD-GNDPSW2PSW2CED2PSW2D-GND 21GYBR46119BRGYBRGYBRD-GNDPSW21211GYGYFG69FGFGBRBLRDORGYGYBRBRGYBROR

AL-1551 CIRCUIT DIAGRAM 13-1611223344EEDDCCBBAALBLBLBGYBLPKD-GNDLEDSDODSDODSDOD321CN126CN123FGMCU PWBSB4DSenser PWBPAPER FEED UNITBRPK213SPPDGYFG6PKPL

AL-1551 CIRCUIT DIAGRAM 13-1711223344EEDDCCBBAACN123GYBLPKD-GNDLEDSDODSDODSDODCopier Side321CN12624V1/DMT0/DMT1DuplexMotor321CN115/DMT2/DMT3542SPMT-1(

Contains lithium-ion battery. Must be disposed of properly.Remove the battery from the product and contactfederal or state environmentalagencies for i

All rights reserved.Printed in Japan.No part of this publication may be reproduced,stored in a retrieval system, or transmitted,in any form or by any

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-23. Operation panel1 Duplex Mode select key and indicator(RSPF only)2 Exposure mode selector key and

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-34. Motors and solenoidsNo. Part name Control signal Function,operation1 Main motor MM Drives the cop

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-45. Sensors and switchesNo. Name Signal Type Function Output1 Mirror home position sensor MHPS Transm

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-56. PWB unitNo. Name Function1 Exposure lamp invertor PWB Exposure lamp (Xenon lamp) control2 Main PW

AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-67. Cross sectional viewNo. Part name Function and operation1 Scanner unit Illuminates the original w

AL-1551 UNPACKING AND INSTALLATION 5-1[5] UNPACKING AND INSTALLATION1. Copier installationImproper installation may damage the copier. Please note the

AL-1551 UNPACKING AND INSTALLATION 5-23. Checking packed components and accessoriesOpen the carton and check if the following components and accessori

CAUTION This product is a class 1 laser product that complies with 21CFR 1040.10 and 1040.11 of the CDRHstandard and IEC825. This means that this ma

AL-1551 UNPACKING AND INSTALLATION 5-34) Remove the TD cartridge from the bag. Remove the protective paper.Hold the cartridge on both sides and shake

AL-1551 UNPACKING AND INSTALLATION 5-48. Power to copier1) Ensure that the power switch of the copier is in the OFF position.Insert the attached power

AL-1551 UNPACKING AND INSTALLATION 5-56) The "Install From Disk" window will appear. Insert the installation CD-ROM into the CD-ROM drive. T

AL-1551 UNPACKING AND INSTALLATION 5-6E. AL-1000 Series printer driver groupWhen the printer driver is installed, the SHARP AL-1000 Series printerdriv

AL-1551 COPY PROCESS 6-1[6] COPY PROCESS1. Functional diagram(Basic operation cycle)(20microns thick)Aluminium drumPigment layer (0.2to 0.3 microns th

AL-1551 COPY PROCESS 6-22. Outline of print processThis printer is a non-impact printer that uses a semiconductor laser andelectrostatic print process

AL-1551 COPY PROCESS 6-3Step-3: Developing (DC bias)A bias potential is applied to the MG roller in the two componentmagnetic brush developing method,

AL-1551 COPY PROCESS 6-4Step-7: Optical discharge (Semiconductor laser)Before the drum rotation is stopped, the semiconductor laser is radiatedonto th

AL-1551 OPERATIONAL DESCRIPTIONS 7-1[7] OPERATIONAL DESCRIPTIONS1. Outline of operationThe outline of operation is described referring to the basic co

AL-1551 OPERATIONAL DESCRIPTIONS 7-22. Scanner sectionA. How to scan documentsThe scanner has sensors that are arranged in a line. These sensorsscan a

At the production line, the output powerof the scanner unit is adjusted to 0.57MILLI-WATT PLUS 20 PCTS and ismaintained constant by the operation ofth

AL-1551 OPERATIONAL DESCRIPTIONS 7-33. Laser unitThe image data sent from the MCU (image process circuit) is sent to theLSU (laser unit), where it is

AL-1551 OPERATIONAL DESCRIPTIONS 7-4A. General descriptionGeneral block diagram (cross section)Top view(1) Heat rollerA teflon roller is used for the

AL-1551 OPERATIONAL DESCRIPTIONS 7-55. Paper feed section and paper transport sectionA. Paper transport path and general operationsPaper feed is made

AL-1551 OPERATIONAL DESCRIPTIONS 7-65) At this time, the paper is fed passed the paper entry detection switch(PPD1), and detected by it. After about 0

AL-1551 OPERATIONAL DESCRIPTIONS 7-73) When pawl C of the manual paper feed clutch sleeve is engaged withthe manual feed latch, the manual feed stoppe

AL-1551 OPERATIONAL DESCRIPTIONS 7-86. Process unit new drum detection mechanism1) When the power is turned on, the detection gear 38T is rotated in t

AL-1551 OPERATIONAL DESCRIPTIONS 7-9C. Operational descriptionsD. Cases where a document jam is caused1) When SPPD is ON (document remaining) when the

AL-1551 OPERATIONAL DESCRIPTIONS 7-10C. Back copyDocument transport:By switchback operation, the document is sent through the PS roller tothe exposure

AL-1551 DISASSEMBLY AND ASSEMBLY 8-1[8] DISASSEMBLY AND ASSEMBLYBefore disassembly, be sure to disconnect the power cord for safety.The disassembly an

AL-1551 DISASSEMBLY AND ASSEMBLY 8-22) Set the charger cleaner to the transfer unit, and move it reciprocally afew times in the direction of the arrow

CONTENTS[1] GENERAL1. Major functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1[2] SPECIFICATIONS1. Basic Specification

AL-1551 DISASSEMBLY AND ASSEMBLY 8-33. Optical sectionA. ListB. Disassembly procedure1) Remove the parts as shown below.2) Remove the screws (2pcs.),

AL-1551 DISASSEMBLY AND ASSEMBLY 8-44) Remove the screw (4 pc) and remove the cover.5) Remove the screws (2 pcs.), the harness, and the optical unit.

AL-1551 DISASSEMBLY AND ASSEMBLY 8-54) Remove the screw and remove the U-turn guide.Pressure roller section disassembly5) Remove the three screws, rem

AL-1551 DISASSEMBLY AND ASSEMBLY 8-610) Remove the pressure release levers on the right and the left sides.11) Remove the pressure roller, the pressur

AL-1551 DISASSEMBLY AND ASSEMBLY 8-75. Tray paper feed/transport sectionA. ListB. Disassembly procedure1) Remove six connectors and screws of the main

AL-1551 DISASSEMBLY AND ASSEMBLY 8-85) Remove the pulleys on the both sides and remove the paper exitroller.6) Pull out the paper exit roller knob and

AL-1551 DISASSEMBLY AND ASSEMBLY 8-99) Remove the harness guide.10) Remove five screws and remove the main drive plate and the belt.11) Remove the par

AL-1551 DISASSEMBLY AND ASSEMBLY 8-1013) Remove two screws and remove the fusing connector.14) Remove five screws and the connector, and lift the inte

AL-1551 DISASSEMBLY AND ASSEMBLY 8-1119) Remove two E-rings and remove the paper feed roller.20) Remove three E-rings and remove the clutch unit.C. As

AL-1551 DISASSEMBLY AND ASSEMBLY 8-122) Remove the screw and remove the side door detection unit.3) Remove three screws and remove the single manual f

AL-1551 GENERAL 1-1[1] GENERAL1. Major functionsConfigurationsDescriptions of itemsCPM: Copy speed (Copies Per Minute)SB/MB: SB = Manual feed single

AL-1551 DISASSEMBLY AND ASSEMBLY 8-136) Remove the cassette detection switch.7) Remove the multi cover.Multi unit1) Remove the screw and remove the mu

AL-1551 DISASSEMBLY AND ASSEMBLY 8-143) Remove three screws and remove the multi paper feed upper frame.4) Remove two screws and remove the multi feed

AL-1551 DISASSEMBLY AND ASSEMBLY 8-157) Cut the binding band and remove the multi paper feed solenoid.C. Assembly procedureFor assembly, reverse the d

AL-1551 DISASSEMBLY AND ASSEMBLY 8-163) Remove two screws and one harness, and remove the main motor.4) Remove two screws and one connector, and remov

AL-1551 DISASSEMBLY AND ASSEMBLY 8-171) Remove the belt, the paper feed frame Spring, and two harnesses.2) Remove the pickup unit.* When installing th

AL-1551 DISASSEMBLY AND ASSEMBLY 8-18D. Manual paper feed roller, pickup roller1) Lift the paper stopper.2) Slide the takeup roller unit.3) Slide the

AL-1551 DISASSEMBLY AND ASSEMBLY 8-19H. PS roller1) Remove the parts.2) Remove the paper supply roller.I. Paper exit roller1) Remove the parts.2) Remo

AL-1551 DISASSEMBLY AND ASSEMBLY 8-20B. Cassette detection switch1) Remove the pawl.2) Remove the cassette detection switch.3) Remove the harness.C. P

AL-1551 DISASSEMBLY AND ASSEMBLY 8-2111.Duplex motor section (RSPF model only)A. Remove the rear cabinet.1) Remove four screws.2) Remove the rear cabi

AL-1551 DISASSEMBLY AND ASSEMBLY 8-22(3) Remove the RSPF.1) Remove the connector and the cable.2) Remove the RSPF.B. Intermediate tray1) Remove the i

AL-1551 SPECIFICATIONS 2-1[2] SPECIFICATIONS1. Basic Specifications2. Operation specificationsItemTy p e D e sk t o pCopy system Dry, electrostaticSeg

AL-1551 DISASSEMBLY AND ASSEMBLY 8-23F. Sensor PWB1) Remove two screws.2) Remove the sensor PWB.3) Remove the harness.G. Pickup solenoid1) Remove two

AL-1551 DISASSEMBLY AND ASSEMBLY 8-24I. Manual paper feed roller, pickup roller(1) Remove the pickup unit.1) Lift the paper stopper.2) Slide the takeu

AL-1551 DISASSEMBLY AND ASSEMBLY 8-25L. Belt 21) Remove three screws.2) Remove the drive unit.3) Remove the belt.Note:When reassembling, hang the belt

AL-1551 DISASSEMBLY AND ASSEMBLY 8-26(2) Remove the paper supply roller.1) Loosen the screw.2) Open the paper exit paper guide.3) Remove the parts.4)

AL-1551 DISASSEMBLY AND ASSEMBLY 8-27S. Paper exit roller(1) Remove the parts.1) Remove two screws.2) Remove the parts.(2) Remove the paper feed paper

AL-1551 ADJUSTMENTS 9-1[9] ADJUSTMENTS1. Optical sectionA. Image distortion adjustmentThere are two types of image distortion.•Horizontal image distor

AL-1551 ADJUSTMENTS 9-24) Manually turn the copy lamp unit/No.2/3 mirror unit drive gear tobring No.2/3 mirror unit into contact with No.2/3 mirror un

AL-1551 ADJUSTMENTS 9-39) Set the image distortion check chart on the document table, andmake a reduction copy (75%) on an A4 or 11" x 8 1/2"

AL-1551 ADJUSTMENTS 9-4e. Adjustment procedure1) Set the test chart for image distortion adjustment on the documentglass, and make a normal copy on a

AL-1551 ADJUSTMENTS 9-52) Set the copy magnification ratio to 100%.3) Make a copy on A4 or 81/2" x 11" paper.4) Measure the length of the co

AL-1551 SPECIFICATIONS 2-2*1) May fluctuate due to environmental conditions and the input voltage.Optical section Scanning sectionScanning system CCD

AL-1551 ADJUSTMENTS 9-66) Check that the actual copy magnification ratio is within the specifiedrange. (100 ± 1.0%).If it is not within the specified

AL-1551 ADJUSTMENTS 9-76) Set the lead edge void amount to B = 50 (2.5mm).When the value of B is increased by 10, the void amount is increasedby about

AL-1551 ADJUSTMENTS 9-82. Copy density adjustmentA. Copy density adjustment timingThe copy density adjustment must be performed in the following cases

AL-1551 ADJUSTMENTS 9-93) Make a copy.Check the adjustment level (shown in the above table) of theexposure test chart (Sharp Gray Scale).(When too bri

AL-1551 ADJUSTMENTS 9-103) Execute simulation 50-18 to make a copy and check the front edgeimage loss at the area where the scale is printed.Adjust th

AL-1551 SIMULATION, TROUBLE CODES 10-1[10]SIMULATION, TROUBLE CODES1. Entering the simulation modeTo enter the serviceman simulation mode, press the k

AL-1551 SIMULATION, TROUBLE CODES 10-22. List of simulationsSim No. Kind of main codeSub codeOperation01 Optical system 01 Mirror scan operation02 SPF

AL-1551 SIMULATION, TROUBLE CODES 10-33. Contents of simulations (new or revised simulations only)Input method: Clear key → Exposure Select key → Clea

AL-1551 SIMULATION, TROUBLE CODES 10-407 01 Warm-up display and aging with jam (Operation/Procedure) 1. When the simulation is executed, warming up i

AL-1551 SIMULATION, TROUBLE CODES 10-526 01 Manual feed setup (Operation/Procedure) 1. When this simulation is executed, the currently set bypass cod

AL-1551 SPECIFICATIONS 2-33. Copy performanceSection, item Details AL-1340 AL-1451 AL-1551Copy magnification Fixed magnification ratios3 Reduction + 2

AL-1551 SIMULATION, TROUBLE CODES 10-626 20 Rear edge void setup (Operation/Procedure) 1. When this simulation is executed, the currently set code n

AL-1551 SIMULATION, TROUBLE CODES 10-726 42 Transfer ON timing control setup (Operation/Procedure) 1. When this simulation is executed, the current

AL-1551 SIMULATION, TROUBLE CODES 10-843 01 Fusing temperature setup (Normal copy) (Operation/Procedure) 1. When this simulation is executed, the c

AL-1551 SIMULATION, TROUBLE CODES 10-946 01 Copy density adjustment (Outline) Used to adjust the copy density in each copy mode. (The copy density ca

AL-1551 SIMULATION, TROUBLE CODES 10-1048 01 Front/rear scan direction (Outline) (1) Front/rear scanning direction magnification ratio auto correctio

AL-1551 SIMULATION, TROUBLE CODES 10-1150 01 Lead edge image position adjustment + Paper lead edge/rear edge void adjustment (Outline) This adjustme

AL-1551 SIMULATION, TROUBLE CODES 10-1250 18 Memory reverse position adjustment in duplex copy When this simulation is executed, the currently set co

AL-1551 SIMULATION, TROUBLE CODES 10-1351 02 Resist quantity adjustment Used to adjust the contact pressure of paper onto the copier resist roller an

AL-1551 SIMULATION, TROUBLE CODES 10-144. Trouble codesA. Trouble codes listMain codeSub codeTrouble content Detail of troubleE7 01 Duplex model memor

AL-1551 USER PROGRAM 11-1[11]USER PROGRAMThe conditions of factory setting can be changed according to the use conditions.1. Functions which can be se

AL-1551 SPECIFICATIONS 2-44. Printer specifications* First print time may differ depending on operating conditions, such as power-supply voltage and r

AL-1551 ELECTRICAL SECTION 12-1[12]ELECTRICAL SECTION1. Block diagramA. Overall block diagramSRAMJITTERSYNC ICASICCPUEPROMSRAMEEPROMRESET IC5VCN5CN15C

AL-1551 ELECTRICAL SECTION 12-2B. MCU PWB unitPAPERCASSETTE1TRAY EMPTYDETECTORPAPER FEEDSOLENOIDPAPERCASSETTE2TRAY EMPTYDETECTORPAPER FEEDSOLENOIDRESI

AL-1551 ELECTRICAL SECTION 12-32. Circuit descriptionsA. Man PWB (MCU)(1) CPU signal tablePIN No.Signal codeInput/output Operating1 /CS1 Output Chip S

AL-1551 ELECTRICAL SECTION 12-4* The signals which are hatched are added or revised to or from theAL-1000.93 /LWR Output Write Signal (Low Address)94

AL-1551 ELECTRICAL SECTION 12-5(2) ASIC (Signal table)PIN No. Signal name IN/OUT Connected to Description1 /SCANSP IN CPU (I/O) Scanner process interr

AL-1551 ELECTRICAL SECTION 12-659 MAD11 OUT DRAM Address bus of DRAM (page memory)60 GND Power61 /CAS0 OUT DRAM CAS signal of DRAM (page memory)62 /CA

AL-1551 ELECTRICAL SECTION 12-7115 /AUTOFD IN1284 board connector /AUTOFD signal (IEEE1284 communication port)116 /STB IN1284 board connector /STB sig

AL-1551 ELECTRICAL SECTION 12-8174 SP OUT CCD PWB CCD drive signal sampling hold pulse175 GND Power176 CP OUT CCD PWB A/D conversion IC latch clock177

AL-1551 ELECTRICAL SECTION 12-9* The signals which are hatched are added or revised to or from AL-1000.226 GND Power227 CPFS2 OUT Tr array IC Second c

AL-1551 ELECTRICAL SECTION 12-103. Reset circuitThis circuit detects ON/OFF of power to control start/stop of each circuit. The 5V voltage of the main