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Sharp Z-20/21 Service Manual
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Sharp Z-20/21 Service Manual

Sharp Z-20/21 Service Manual

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[ 1 ] BASIC SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
[ 2 ] EXTERNAL VIEW AND OPERATION PANEL FUNCTIONAL DESCRIPTIONS . .2
[ 3 ] UNPACKING AND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
[ 4 ] SUPPLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
[ 5 ] INTERNAL STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
[ 6 ] COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
[ 7 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
[ 8 ] DISASSEMBLY, ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
[ 9 ] SIMULATION AND SELF DIAGNOSICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
[10] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
[11] DRUM CARTRIDGE REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
[12] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Parts marked with "!" is 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
CONTENTS
SHARP CORPORATION
CODE: 00ZZ26SM1E///
MODEL
Z-20/21
MODEL
Z-25/26
MODEL
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 Z-20/21

  • Page 1 SERVICE MANUAL CODE: 00ZZ26SM1E/// MODEL Z-20/21 MODEL Z-25/26 MODEL CONTENTS [ 1 ] BASIC SPECIFICATIONS ..........1 [ 2 ] EXTERNAL VIEW AND OPERATION PANEL FUNCTIONAL DESCRIPTIONS .
  • Page 2 CONTENTS [ 1 ] BASIC SPECIFICATIONS [ 9 ] SIMULATION AND SELF DIAGNOSTICS ......1 ..22 1.
  • Page 3 Accessories: Developer cartridge (black) x 1 pc. (Optionally [1] BASIC SPECIFICATIONS available for U.S.A., Canada, and Singapore.) Photoconductor cartridge x 1 pc. Power cord Operation manual Type: Portable Guarantee paper(Australia, Zealand, Copy system: Dry, plain paper copier Canada only) Document kind: Sheet, book.
  • Page 4 [2] EXTERNAL VIEW AND OPERATION PANEL FUNCTIONAL DESCRIPTIONS 1. Operation panel The illustrations show the Z-26. Rear side Release button (When moving the document table manually be sure to press and hold this button while moving. If the document table is moved without pressing this button, an necessary load is applied to the drive section, causing a Document cover...
  • Page 5 2. Display descriptions Z-26 Z-21 PRINT key READY indicator C (clear) key EXPOSURE key COPY QUANTITY key COPY QUANTITY display TD cartridge replacement indicator Misfeed indicator READY indicators EXPOSURE key Tone seve indicator EXPOSURE indicators Exposure indicators Tone seve indicator TD cartridge replacement indicator Misfeed indicator Name...
  • Page 6 Name Functions • EXPOSURE key This key allows setting of auto exposure (one step) and manual exposure (three steps: Light, Normal, and Dark), and the toner save mode. • Display cycle of each exposure mode. Exposure cycle Display 1. Auto Toner save Light Auto Dark 2.
  • Page 7 [3] INSTALLATION AND STORAGE 1. Unpacking Power cord 4. Although the copier can be stored standing up, place the copier Operation manual on a firm, level surface when using it. TD(Toner/Developer) cartridge Paper tray A small amount of ozone is produced within the copier during opera- tion.
  • Page 8 3. Press the front-cover open button to unlatch the front cover and 9. Fit the paper tray in the copier by inserting it at an upward angle open it. into the grooves on the sides of the paper feed slot. (Z-26 only) Front-cover open button 10.
  • Page 9 <Drum cartridge> 2. How to identify the production control number The control number label is on the top of the drum cartridge, which shows the year and the month of the production. <<TD cartridge>> The control number label is on the top of the TD cartridge, which shows the year and the month of the production.
  • Page 10 2. Motors, solenoids, switches 3. Sensors, thermistor, thermostat Circuit Circuit Name diagram Type Function Name diagram Type Function code code Paper feed PID (Paper Senses paper Drive motor MM DC motor Drives all loads. Photo sensor sensor in detector) entry. Toner Toner supply is supply...
  • Page 11 [6] COPY PROCESS This model uses an OPC. (photoconductor) drum to form an image on it. 1. Copy process diagram Original SELFOC lens Copy lamp Main corona Exposure Charge Discharge Toner Developing Drum Developer Cleaning Cleaning blade Resist roller Waste toner collection Paper stoper Sync with Paper exit...
  • Page 12 Step 2. Charge Step 4. Developing A uniform negative charge is applied over the OPC drum surface by Toner is attracted from the MG roller to the latent image on the drum the main corona unit. (Controlled by the grid bias.) surface forming a visible image.
  • Page 13 Step 6. Separation The paper is negatively charged (About –3KV) by the discharge pin to neutralize the potential, separating the paper from the drum. Step 7. Cleaning The residual toner remaining on the drum is collected by the cleaning blade and carried into the toner collection unit. Cleaning blabe Toner collection...
  • Page 14 [7] OPERATIONAL DESCRIPTIONS (Document) 1. Optical system 1-1. Optical system outline Light source: Fuse bulbs are used as the light source. Eight fuse bulbs are arranged in series on the PWB. The temperature fuse is also installed on the PWB. The copy lamp also has the function as the discharge lamp to attenuate the potential on the drum.
  • Page 15 2-2. Outline of paper feed operation <<Z-26>> When the COPY key is pressed, the motor starts rotating. At the same time, the paper feed solenoid turns on to raise the stopper. Paper is fed and the paper entry sensor (PID) is turned on. The paper is stopped by the resist roller.
  • Page 16 4-2. Outline of operation 5. Others Positions of the racks, the bracket guide, and the C bracket are shown below: 5-1. Fusing temperature control Rack guide When the power is turned on, the power relay is also turned on at Bracket guide position the same time.
  • Page 17 5-2. Toner empty control When the paper entry sensor (Z-21) or the COPY key (Z-26) is turned on, if the toner control sensor output (TCS) is HIGH, the toner supply solenoid (THS) is turned on to supply toner. If TCS is not driven LOW after 60 sec of toner supply, the developer cartridge replacement lamp is lighted and the machine is stopped.
  • Page 18 Remove the rack gear bracket. [8] DISASSEMBLY AND ASSEMBLY Note position of each component for reassembly. <<Note for disassembly and assembly>> (1) When disassembling, disconnect the power plug. Never remove or assemble the PWB or connectors with the power ON. (2) Be careful not to drop small parts and screws inside the machine.
  • Page 19 4. Operation panel disassembly 6. AE sensor removal Remove the document table. Remove the document table. Remove the top cabinet. Remove the top cabinet. Remove the screw which is fixing the operation panel, and Remove the copy lamp unit (four screws). remove the connector.
  • Page 20 Remove the MC cable (red) and GRID cable (white). (1 screw for 8. Drive unit disassembly each) Remove the document table. Spring Remove the top cabinet. White Remove the bottom cabinet. Note for attachment: Be careful not to mistake the attachment position of each cable.
  • Page 21 Remove the motor encoder sensor PWB. (1 screw) Disconnect connectors CN212 and CN210 which are connected to the main PWB. Remove the motor encoder disk. (secured with C-ring) Motor encoder sensor PWB Motor encoder disk Disconnect the toner supply solenoid connector CN102, CN107, Remove the main chassis from the bottom base.
  • Page 22 9. Drive motor disassembly 11. Lower heat roller disassembly Remove the document table. Remove the document table. Remove the top cabinet. Remove the top cabinet. Remove the bottom cabinet and remove the drum cartridge. Remove the bottom cabinet and the drum cartridge. Remove the motor encoder sensor PWB and the encoder.
  • Page 23 13. Fusing separation pawl disassembly Remove the two screws and an E-ring which are fixing the paper feed unit. Remove the document table and the top cabinet. Remove the fan unit and the main PWB. Remove the fusing separation pawls. 14.
  • Page 24 [9] SIMULATION AND SELF DIAG 1. Simulation Simulation No. Content Use division Total counter read Service Drum counter read Service Total counter write Service Drum counter write Service Drum counter clear Service Total counter read (Z-21 only) Lead edge image loss adjustment Service Copy lamp normal range brightness adjustment AE gain setting (auto)
  • Page 25 Simulation No. and function Content Press the PRINT key, and the misfeed indicator will light up to allow entry of the digit of ten thousands. Set a value with the copy quantity set key and press the PRINT key to establish the setting.
  • Page 26 Simulation No. and function Content <Display at total counter read> The display means as shown below: Value LED display READY indicator OFF= Digit of ten Blink Light thousands ON= Digit of thousands Blink= Digit of hundred Lead edge image loss adjustment Entering the simulation Copy lamp manual normal range Short the main PWB pins (JP210-JP211), turn on the power, and the misfeed indicator will...
  • Page 27 Simulation No. and function Content <AE gain setting (manual)> With the exposure AUTO lamp blinking, turn the VR202 to set the AE (auto exposure) gain manually. When the VR202 is turned clockwise, brightness is increased. When the VR202 is turned counterclockwise, brightness is decreased. After completion of the setting, press the EXPOSURE key to establish and store the set value.
  • Page 28 2. Self diag functions When a trouble occurs in the machine, the display indicates it and the machine stops immediately. The display section differs in the Z-21 and in the Z-26. <List of the self dial functions> Display Content Major cause Z-21 Z-26 •...
  • Page 29 • When the power unit is replaced. [10] ADJUSTMENTS Even in the other cases, when the drive section or the paper feed section is disassembled or when some parts in those sections are 1. Lead edge image loss adjustment replaced, check copy quality. Use a simulation to perform the lead edge adjustment.
  • Page 30 <<Lead edge image loss adjustment procedure>> 2. Exposure adjustment Place a scale on the center of the document table and attach it The exposure adjustment is required in the following cases: with adhesive tape. • When replacing the drum unit. Turn off the power and remove the sensor cover in the paper exit •...
  • Page 31 • If the copy exposure is proper, the adjustment is completed. Turn off the power and remove the seal cover in the paper exit side. • If the copy exposure is not proper, go to step (4) again. Short the main PWB pins JP210 and JP211, and turn on the <<Standards>>...
  • Page 32 7. Push the drum cartridge release lever up, rotate the cartridge [11] Drum cartridge replacement upwards and pull it out from the copier. The drum cartridge should be replaced by a service engineer, and should not be replaced by the user. 1.
  • Page 33 • The exposure indicators will light up for approximately 5 2-2. Counter clear seconds. Then, the READY indicator will light up and all the Turn the power switch on while pressing the EXPOSURE key at exposure indicators except (A) will go out. The copier is now the same time.
  • Page 34 [12] CIRCUIT DIAGRAM 1. BLOCK DIAGRAM Z-21 Operation panel VD (5V) DC Power supply PWB Main PWB AE sensor INLET CL (AC) Copy lamp control circuit RRS-A RRS-B High voltage circuit VH (31V) IC203 VD (5V) V18 (18V) VH (31V) VH (31V) Heater lamp control circuit...
  • Page 35 2. NAIN PWB CPU (IC203) SIGNAL NAME PIN No. Port Signal name IN/OUT Active level Specifications P50/TXD SDA (EEPROM) OUT/IN — EEPROM data signal line P51/RXD — P52/SCK SCL (EEPROM) — EEPROM clock signal line /RES RESET Reset state at LOW (OV). /NMI /NM1 Driven LOW when the CPU is hung up,and interruption occurs.
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  • Page 49 18. COPY LAMP CIRCUIT/PWB-1: 100V SERIES 100V F401 115˚C CLO2 CN401-1 CLO1 CN401-2 19. COPY LAMP CIRCUIT/PWB-2: 200V SERIES 200V F401 133˚C CLO1 CN401-1 CLO2 CN401-2 20. MES (Motor Encorder Sensor) CIRCUIT/P.W.B CN501-1 CN501-2 PD501 GP1S53V CN501-3 – 47 –...
  • Page 50 21. TIMING CHART (Z-21) Power switch Power relay 300msec 2.3sec 300msec Copy end, no key input After 90 sec Sleep mode ON with any key ⁄ " × 11" COPY • A4, 8 Power in SW Heater lamp DV bios Motor 2.0sec Copy lamp...
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  • Page 54 © COPYRIGHT 1997 BY SHARP CORPORATION 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 means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.
  • Page 55 Z-21(Operation PWB A Z-21) '(%& Z-26(Operation PWB B Z-26) )%& (Power supply PWB) (Index)   This document has been published to be  ! "#$%& used for after sales service only. SHARP CORPORATION  '()*+,#- The contents are subject to change without notice.
  • Page 56  DEFINITION The definition of each Rank is as follows and also noted in the list A : Parts necessary to be stocked as High usage parts. B : Parts necessary to be stocked as Standard usage parts. C : Low usage parts. D : Parts necessary for refurbish.
  • Page 57 1   (Top cabinet unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  A GCAB-0785FCA1 Top cabinet A (Japan only) (Z-21)  A GCAB-0785FCZ1 Top cabinet A (Except Japan) (Z-21)  B GCAB-0787FCA1 Top cabinet B (Japan only) (Z-26)  B GCAB-0787FCZ1...
  • Page 58 1   (Top cabinet unit) Z-21 Z-26 FCP02580 – 2 –...
  • Page 59 2     (Bottom door unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  XEBSE30P08000 Screw (3 XWHSD30-05080 / Washer  PGIDM1473FCZ1 (%0'   Fusing front paper guide  LPLTM4503FCZZ   3   Grand plate  CHLDZ1169FH52  4(   # 52 Discharge holder unit  6 7 LPINS0282FCGZ Bottom door pin (Japan only)
  • Page 60 3   (Table unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK OC  M GCOVH0226FCAZ OC cover M (Japan only) OC  M GCOVH0226FCZZ OC cover M (Except Japan)  PSHEZ3443FCZ1 OC  OC sheet  PSPAK0620FCZZ '$ Rack spacer 0 3) PCASZ0254FCAZ...
  • Page 61 3   (Table unit) FPC02582 4   (Drive unit) 27 24 FCP02583 – 5 –...
  • Page 62 5    (Bottom cabinet unit) Z-21 Z-26 17 21 Z-26 48 47 Z-26 FCP02584 – 6 –...
  • Page 63 5    (Bottom cabinet unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  LSTPP0299FCZ1 '    )    Paper gate stopper (Z-21) MSPRC2135FCZZ G  G spring (Z-21)  NROLR1002FCZ1 PF : A PF roller A (Z-21)  XPSSJ20-07000  NGERH0977FCZZ...
  • Page 64 5    (Bottom cabinet unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  6 A GCAB-0784FCAZ Bottom cabinet A (Japan only) (Z-21)  6 A GCAB-0784FCZZ Bottom cabinet A (Except Japan) (Z-21)  6 B GCAB-0786FCAZ Bottom cabinet B (Japan only) (Z-26)  6 B GCAB-0786FCZZ...
  • Page 65 6   (Light source unit) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK 3(@  3 PSHEP3442FCZ1 Reflective sheet 3 (Japan only) 3(@  3 PSHEP3632FCZZ Reflective sheet 3 (Except Japan) XEBSD26P05000 Screw (2.6  MSPRP2128FCZZ SLA SP  SLA spring plate  PLNS-0049FCZZ SLA 3 SLA lens...
  • Page 66 7   (Main chassis) Z-21 Z-26 FCP02586 – 10 –...
  • Page 67 7   (Main chassis) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  CMOTP0742FH5A -B#52 Main motor unit NBLTH0226FCZZ E'  Fan belt  NPLYZ0287FCZ1 E    Fan pulley  NPLYZ0288FCZ1 7     Idle pulley  NSFTZ2020FCZ2 7  Idle shaft  XEBSD30P08000...
  • Page 68 7   (Main chassis) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  MSPRC2150FCZZ  300BF Spring F (Z-26)  MSPRC2152FCZZ  300BC Spring C (Z-26)  MSPRC2151FCZZ  300BR Spring R (Z-26)  LSTPP0300FCZZ     Stopper plate (Z-26)  MARMP0172FCZ1 76 B...
  • Page 69 8   Z-26(Multi paper feeding unit⋅⋅Z-26) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  XRESP40-06000 E  E type ring (4E)  MSPRC1403FCZ1  M3 Spring M3 (Except Japan)  XPSSJ20-07000 Pin (φ 2-7)  NBRGP0297FCZZ ($ ") B MF bearing B (Except Japan)  PSHEZ2038FCZZ  M2...
  • Page 70  !"#$ (Packing material & Accessories) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK HI 1 QACCJ9610QCZZ AC cord (125V 12A)(Japan,Philippines,Taiwan,Indonesia) AC 1 QACCD7614QCN1 AC cord (UL CSA plug)(Brazil) AC 1 QACCL7621QCZZ AC cord (Australia inly) AC cord (φ 4.8 2P)(Europe⋅⋅Except U,Kingdom,Lebanon,Iran,Iraq, AC 1 QACCV6621QCN1 Nigeria,Turkey,Algeria)
  • Page 71  !"#$ (Packing material & Accessories) Z-21 Z-26 FCP02588 – 15 –...
  • Page 72 10  (Main PWB) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK & QFS-E9310QCZZ Fuse (125V/1.5A) [CP202]  QCNCM7014SC0B 1 # Connector (2pin) [CN202,205]  QCNCM7014SC0C 1 # Connector (3pin) [CN204]  QCNCM7014SC1B 1 # Connector (12pin) [CN203]  QCNCM7014SC1F 1 # Connector (16pin) [CN210]  QCNCP0240QCZZ 1 #...
  • Page 73 10  (Main PWB) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK Resistor (1/10W 1.3KΩ ±5%)  VRS-TS2AD132J (1" [R734,780] Resistor (1/10W 130KΩ ±1%)  VRS-TS2AD134F (1" [R774,775]  VRS-TS2AD134J Resistor (1/10W 130KΩ ±5%) (1" [R715]  VRS-TS2AD152J Resistor (1/10W 1.5KΩ ±5%) (1"...
  • Page 74 %& (Main PWB) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK -  B127 CPWBN1020FCGF Main PWB B (120V/127V) (Z-26) -  B200 CPWBN1020FCGM Main PWB B (200V series) (Z-26) '(%& Z-21(Operation PWB A Z-21) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK...
  • Page 75  (Power supply PWB) PRICE RANK NEW PART PARTS CODE DESCRIPTION MARK RANK  VCEAAL1HC222M 1( $ Capacitor (50WV 2200pF) [C106]  VCEAGU1HW476M 1( $ Capacitor (50WV 47µ F) [C107]  VCQYNU1HM103K 1( $ Capacitor (50WV 0.010µ F) [C102] ! VCQYNU1HM104K 1( $ Capacitor (50WV 0.10µ F) [C103,108]  VHDS2VB10F/-1 # A...
  • Page 76 (Index) PRICE R. PRICE R. JAPAN ONLY JAPAN ONLY PARTS CODE PARTS CODE NEW P/R NEW P/R ORDER CODE ORDER CODE DHAI-2244FCZZ 572 542 0168 CBRC-0053FC01 DHAI-2245FCZ2 572 203 0279 572 542 1090 CBRC-0054FC01 DHAI-2246FCZZ 572 203 0280 572 542 0170 CBRC-0056FH5C DHAI-2247FCZZ 572 203 0477...
  • Page 77 PRICE R. PRICE R. JAPAN ONLY JAPAN ONLY PARTS CODE PARTS CODE NEW P/R NEW P/R ORDER CODE ORDER CODE LPINS0284FCZZ MSPRT0735FCZ2 572 218 0386 572 258 2411 LPLTM4494FCZZ 572 221 4943 LPLTM4496FCZZ NBLTH0226FCZZ 572 221 4944 572 271 0377 LPLTM4498FCZZ NBLTH0229FCZZ 572 221 4945...
  • Page 78 PRICE R. PRICE R. JAPAN ONLY JAPAN ONLY PARTS CODE PARTS CODE NEW P/R NEW P/R ORDER CODE ORDER CODE PCUSS0301FCZZ QFSHB1003CCZZ 572 326 0258 502 516 0002 13- PFILW0206FCZZ QSOCA0063FCZZ 572 337 0208 572 527 0093 13- PGIDM1472FCC1 QSW-C9026QCZZ 572 345 2176 572 530 0552 13- PGIDM1473FCZ1...
  • Page 79 PRICE R. PRICE R. JAPAN ONLY JAPAN ONLY PARTS CODE PARTS CODE NEW P/R NEW P/R ORDER CODE ORDER CODE TCAUA0766FCZZ VHEHVRD6650-1 572 914 0012 572 577 0024 10- 134 TCAUH0004QSZZ VHEMTZJ16B/-1 572 914 0666 572 571 0199 13- TCAUH0918FCZZ VHERD12EL3/-1 572 914 0078 594 571 0017 10-...
  • Page 80 PRICE R. PRICE R. JAPAN ONLY JAPAN ONLY PARTS CODE PARTS CODE NEW P/R NEW P/R ORDER CODE ORDER CODE VRS-TS2AD105J XEBSE30P08000 500 581 5040 10- 595 970 0121 VRS-TS2AD123F XEBSE30P10000 572 581 1662 10- 595 970 0122 VRS-TS2AD132J XEPSD23P05000 595 581 0217 10- 572 970 1462 VRS-TS2AD134F...
  • Page 81 COPYRIGHT 1997 BY SHARP CORPORATION 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 means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

This manual is also suitable for:

Z-25/26