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Sharp AL-1020 Service Manual

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[ 1 ] GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1
[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
[ 3 ] EXTERNAL VIEWS AND INTERNAL STRUCTURE . . . . . . . . . . . . 3 - 1
[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1
[ 5 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1
[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 2
[ 7 ] SIMULATION,TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1
[ 8 ] USER PROGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1
[ 9 ] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1
[10] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1
PARTS GUIDE
Parts marked with "
" is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safty and performance of the set.
SERVICE MANUAL
* This Service Manual describes only the differences from
the AL-1000/1010. For the common items with the
AL-1000/1010,please refer to the AL-1000/1010 manual.
CONTENTS
SHARP CORPORATION
CODE: 00ZAL1250/A1E
DIGITAL COPIER
AL-1020
AL-1200
AL-1220
AL-1250
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
AL-1250

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  Summary of Contents for Sharp AL-1020

  • Page 1: Table Of Contents

    AL-1250 SERVICE MANUAL CODE: 00ZAL1250/A1E DIGITAL COPIER AL-1020 AL-1200 AL-1220 AL-1250 MODEL * This Service Manual describes only the differences from the AL-1000/1010. For the common items with the AL-1000/1010,please refer to the AL-1000/1010 manual. CONTENTS [ 1 ] GENERAL..........1 - 1 [ 2 ] SPECIFICATIONS .
  • Page 2: Model

    Since warm-up time is zero, copying can be started imme- diately after the power switch is turned on. First-copy time is only 9.6 seconds (normal mode). Copying speed is 10 copies/min. (AL-1020) or 12 copies/min. (AL-1220/AL-1250), which adapts to business use, allowing improvement of working efficiency.
  • Page 3: 2 ] Specifications

    AL-1250 SPECIFICATIONS 1. Basic specification Item AL-1020 AL-1220 AL-1250 AL-1200 H379 W518 H464 W518 H293 W518 External dimensions (W H) (mm) D477 mm D477 mm D445 mm Weight 21.5 kg 21.5 kg 24.5 kg 18.0 kg 2. Operation Specification Section item...
  • Page 4 AL-1250 3. Copy performance Section item Item AL-1020 AL-1220 AL-1250 AL-1200 9.6 sec. (Pre- heat mode: 16 sec. or delow/Auto power-shut-off mode: 23 sec. Tray paper feed or delow Feed from Tray1/Scan Once Print Many Mode: Copy speed First copy time 13.9 sec...
  • Page 5 AL-1250 4. GDI Printer Specification (Standard for AL-1250, Option for AL-1020/1220) Printer speed WPPM (TBD) (A4/8-1/2 11, Sharp original) 9.6 sec (A4/8-1/2 11, Not include communication time to the host PC and the set up First Print time time of polygon mirror)
  • Page 6 (19) Power cord socket (20) Parallel interface connector 1 The AL-1250 is equipped with two paper trays. 2 (AL-1020/AL-1220 only) (For the AL-1020/AL-1220, a printer upgrade kit is optional.) 3 AL-1250 only 2. Internal (1) TC cartridge lock release button...
  • Page 7 AL-1250 3. Operational panel (10) (11) 200% MAX. 129% 100% 100% ZOOM MIN. (12) (13) (14) (15) (16) (17) Exposure mode selector key and Light and dark keys and exposure Alarm indicators indicators indicators Copy ratio selector key and copy SPF indicator SPF misfeed indicator ratio indicators...
  • Page 8 AL-1250 4. Motors and solenoids Part name Control signal Function,operation Main motor Drives the copier. Mirror motor MRMT Drives the optical mirror base (scanner unit). Toner motor Supplies toner. Cooling fan motor Cools the optical section. Resist roller solenoid Resist roller rotation control solenoid Paper feed solenoid CPFS1 Cassette Paper feed solenoid...
  • Page 9 AL-1250 5. Sensors and switches (12) (10) (11) (13) (14) Name Signal Type Function Output Mirror home position Mirror (scanner unit) MHPS Transmission sensor “H” at home position sensor home position detection POD sensor Transmission sensor Paper exit detection “H” at paper pass Paper transport detection PPD2 sensor PPD2...
  • Page 10 AL-1250 6. PWB unit Name Function Exposure lamp invertor PWB Exposure lamp (Xenon lamp) control Main PWB (MCU) Copier control Operation PWB Operation input/display Power PWB AC power input, DC voltage control, High voltage control CCD sensor PWB For image scanning LSU motor PWB For polygon motor drive TCS PWB...
  • Page 11 AL-1250 7. Cross sectional view (19) (16) (17) (18) (10) (11) (12) (13) (15) (14) Part name Function and operation Illuminates the original with the copy lamp and passes the reflected light to the lens unit Scanner unit (CCD). Exposure lamp Exposure lamp (Xenon lamp) Illuminates original Lens unit Scans the original image with the lens and the CCD.
  • Page 12: 4 ] Unpacking And Installation

    AL-1250 subject to extreme temperature or humidity changes, e.g., UNPACKING AND INSTALLATION near an air conditioner or heater. 1. A WORD ON COPIER INSTALLATION Improper installation may damage the copier. Please note the following during initial installation and whenever the copier is moved.
  • Page 13 1) Remove pieces of tape and protective cover. Then open the original cover and remove protective materials (a) and (b). AL-1020/AL-1220 4) Remove the TD cartridge from the bag. Remove the protec- tive paper. Hold the cartridge on both sides and shake it horizontally four or five times.
  • Page 14 AL-1250 7) Close the front cover and then the side cover by pressing 4) Adjust the paper guides on the paper tray to the copy paper the round projections near the side cover open button. width and length. Squeeze the lever of paper guide (A) and slide the guide to match with the width of the paper.
  • Page 15: 5 ] Operational Descriptions

    AL-1250 OPERATIONAL DESCRIPTIONS 1. SPF section A. Outline The SPF (Single Path Feeder) is installed to the AL-1000/1200 as a standard provision, and it automatically copies up to 30 sheets of documents of a same size. (Only one set of copies) B.
  • Page 16: 6 ] Disassembly And Assembly

    AL-1250 D. Cases where a document jam is caused a. When SPPD is ON (document remaining) when the power is turned on. b. When SPPD is not turned ON within about 1.5 sec (at 100% copy) after starting the document feed operation. c.
  • Page 17 AL-1250 A. Sensor PWB C. Clutch 1) Remove two screws from the bottom of the pickup unit. 1) Remove the E-ring. 2) Remove the upper cover. 2) Remove the pulley and bush. 3) Slide the bush in the arrow direction. 4) Lift the clutch, and 5) remove the clutch.
  • Page 18 AL-1250 When installing the takeup roller, hang the projection of the F. SPF motor takeup roller unit on the solenoid arm. 1) Remove the harness. 1) Remove the parts. 2) Remove four screws. 2) Remove the manual paper feed roller. 3) Remove the drive unit.
  • Page 19 AL-1250 H. PS roller 1) Open the right cabinet. 1) Remove the parts. 2) Remove three screws. 2) Remove the PS roller. 3) Remove one connector. 4) While tilting down the 2nd connection arm A, pull and remove the paper feed unit toward you. I.
  • Page 20 AL-1250 C. Paper feed solenoid E. Paper feed clutch 1) Remove the screw. 1) Remove the E-ring. 2) Remove the connector. 2) Remove the paper feed clutch. 3) Remove the paper feed solenoid. 3) Remove the parts. D. Transport roller 1) Remove two E-rings.
  • Page 21 AL-1250 SIMULATION TROUBLE CODE 1. Contents of simulations Main code Sub code Contents SPF sensor status display (Operation/Procedure) ON/OFF of the SPF sensor is displayed with the lamps on the operation panel. Sensor name Display lamp Document set sensor (SPID) Developer cartridge replacement lamp SPF document transport sensor (SPPD) Jam lamp...
  • Page 22 AL-1250 Main code Sub code Contents Side void amount setting (Operation/Procedure) 1. When this simulation is executed, the currently set code number of the side void amount is displayed. 2. Enter the code number and press the start key. The setting is changed. Code number Setting 0 mm...
  • Page 23 AL-1250 Main code Sub code Contents (Adjustment method) 1. Set the print start position (A: AE ON), the lead edge void amount (B: TEXT ON), the scanning start position (C: PHOTO ON) to zero and make a copy of a scale at 100%. 2.
  • Page 24 AL-1250 Main code Sub code Contents Resist amount adjustment (Outline) The contact pressure of paper onto the resist roller and the RSPF resist roller is adjusted. (Operation/Procedure) 1. When this simulation is executed, the currently set value is displayed. 2. For a machine with a multi manual paper feed unit installed, when the copy mode select key is pressed, each set mode and display are changed.
  • Page 25: 8 ] User Programs

    AL-1250 USER PROGRAM The conditions of factory setting can be changed according to the use conditions. 1. Functions which can be set with the user program Function Contents Factory setting When a certain time is passed after completion of copying, this function returns to the Auto clear.
  • Page 26 AL-1250 3. AE level adjustment (OC mode) [Input method] When the PHOTO lamp lights up, press and hold the density select key for 5 sec, and the AUTO mode lamp will blink and the adjusted level will be displayed on the exposure level dis- play.
  • Page 27: 9 ] Electrical Section

    AL-1250 ELECTRICAL SECTION 1. Block diagram A. Overall block diagram...
  • Page 28 AL-1250 B. Main PWB block diagram...
  • Page 29 AL-1250 2. Circuit descriptions A. Main PWB (MCU) (1) CPU signal table The additional signal is as follows: Pin No. Signal name In/Out During operation SIN3 Input Sensor input 3 The signals of function change are as follows: Pin No. Signal name In/Out During operation...
  • Page 30 AL-1250 (4) Mirror motor circuit The mirror motor is a stepping motor. Its driver is IC113 constant-current chopper control IC (SLA7024). For control, the CPU outputs a drive signal to IC113 to drive the mirror motor by 1-2 phase excitement. The SPF motor and the mirror motor are switched with relays RY1 and RY2.

This manual is also suitable for:

Al-1200Al-1220Al-1250