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[ 1 ] PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
[ 3 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
[ 4 ] STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
[ 5 ] OPERATIONAL DESCRIPTIONS (MECHANISM SECTION) . . . . . . . . . . . 7
[ 6 ] DISASSEMBLY, ASSEMBLY AND ADJUSTMENT . . . . . . . . . . . . . . . . . 14
[ 7 ] CONNECTOR LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
[ 8 ] REPLACEMENT PARTS AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . 21
[ 9 ] TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
[10] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
[11] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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 safety and performance of the set.
SERVICE MANUAL
Reversing Automatic
Document Feeder
(RADF: SF-A57)
Automatic Document Feeder
(ADF: SF-A18)
MODEL
MODEL
CONTENTS
SHARP CORPORATION
CODE: 00ZSFA57SM//E
SF-A57
SF-A18
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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Table of Contents
Related Manuals for Sharp SF-A57
Summary of Contents for Sharp SF-A57
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Page 1: Table Of Contents
SERVICE MANUAL CODE: 00ZSFA57SM//E Reversing Automatic Document Feeder (RADF: SF-A57) Automatic Document Feeder (ADF: SF-A18) SF-A57 MODEL SF-A18 MODEL CONTENTS [ 1 ] PRODUCT OVERVIEW ........1 [ 2 ] SPECIFICATIONS . -
Page 2: 1 ] Product Overview
(ADF) for the copier SF-2020/2120. The the document feed cover is opened. SF-A57 is capable of automatically copying both sides of document by inverting the document sheets up-side down, while feeding them. Document sheets of different lengths and the same width may be set [3] UNPACKING AND in the document tray. - Page 3 2. Mount the ADF onto the copier. Included parts Remove the two cut-outs from the rear part of the upper cover of the copier. Cut-outs Rear part of upper cover ADF tray ADF mounting screws ADF securing screws Tray securing screws (2 pcs.) (2 pcs.) (2 pcs.)
- Page 4 3. Adjust the angle of ADF. 5. Connect the ADF tray connector. Loosen the two securing screws for the angle adjusting panel at- Thread the M4 x 8 tray securing screws (included parts) partway into tached to the hinge angle and then fasten the loosened screws while their holes, then connect the tray connector.
- Page 5 • If the mode is to be set in combination with other options, use the The leading edge position can be adjusted within a range of 8 mm table shown below to add up the total of the setting values for all (8 steps) on the stopper side and 7 mm (7 steps) on the glass side the peripheral devices to be set, and set that total value.
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Page 6: 4 ] Structure
[4] STRUCTURE A. External fitting C. PWB distribution Original guide Reverse sensor Control PWB Original support PWB (SF-A57 only) Original feed cover Original transport cover Display lamp Original reverse Original exit section sensor PWB LED PWB cover Original timing sensor PWB B. - Page 7 E. Sensors, switches, detectors DLS1 TGOD (SF-A57 only) RDD (SF-A57) DES (SF-A18) AUOD DFMRS FGOD DWVR Code Name Type Functions and operations Contact/output Original feed sensor Reflection sensor Turns HIGH when the original lead edge HIGH when the original is is fed just in front of the resist roller.
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Page 8: 5 ] Operational Descriptions (Mechanism Section)
Resist roller transport belt roller Paper feed roller Step 13: The original is stopped by the resist roller and follower roller SF-A57 the paper feed motor (DFM) is turned OFF. ↓ Weight plate Paper feed roller... - Page 9 ↓ ↓ Step 25: Paper feed motor (DFM) OFF Step 40: Paper exit sensor (DES) senses the original (Resist roller stops.) rear edge. (DES output HIGH) ↓ ↓ Step 26: Transport motor (DTM) OFF Step 41: Original width sensor (DWS) output HIGH ...
- Page 10 ↓ 2) SF-A57 RADF mode (duplex copy mode) copying Step 16: Paper feed motor (DFM) OFF START (The original is stopped with its lead edge ↓ taken up by the resist roller.) ↓ Step 01: The transport section is closed. (AUOD ON) ↓...
- Page 11 ↓ ↓ Step 31: Transport motor (DTM) OFF (Reverse (Transport belt rotation) rotation) ↓ ↓ Step 46: Reverse solenoid (DRSOL) ON Step 32: Reverse motor (DRM) forward rotation (The flapper moves up.) (Reverse roller, paper exit roller rotation) ...
- Page 12 ↓ ↓ Step 60: Transport motor (DTM) forward rotation Step 77: Reverse sensor (RDD) senses the rear edge (Transport belt rotation) of the reverse original. (RDD output LOW) ↓ Reverse motor (DRM) forward rotation Reverse roller, paper exit roller rotation) ...
- Page 13 B. Original size detection The original size is detected in three ways. 1) Original size detection by the original set tray The original size detection by the original set tray is used in automatic paper size and automatic magnification selection mode, in order to recognize the original size when the original is set on the original tray, allowing the automatic selection of paper size and magnification ratio of copy.
- Page 14 2) Original size detection by the original width sensor (DWS) in the paper feed section The original size detection by the original width sensor (DWS) in the paper feed section is used in automatic paper size and automatic magnification ration selection mode to determine whether the original is A4 or A5 (11"...
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Page 15: 6 ] Disassembly, Assembly And Adjustment
3) Original size detection by the paper feed motor [6] DISASSEMBLY, ASSEMBLY AND rotation sensor (DFMRS) ADJUSTMENT This function compensates for the inaccuracy of the original size recognition in the original tray when originals of different sizes are stacked in the original tray. That is, results of this function has priority * Descriptions in this chapter excludes simple disassembly and as- over the original size detection in the original tray. - Page 16 2. Belt unit disassembly 3. Paper feed unit disassembly Open the transport section. Open the transport section. Remove two screws as shown in the figure below, and remove the Remove the tray. (Refer to the installing procedure.) belt unit as shown with arrow and arrow in this sequence.
- Page 17 Remove two springs from the separation roller holder, and remove the bearing and the slide bearing. Remove the separation roller and the spring clutch. Spring (Remove.) SF-A57 SF-A18 5. Separation roller disassembly Slide shaft bearing Open the paper feed cover.
- Page 18 6. Semi-circular roller, paper feed roller 7. Open/close switch attachment disassembly When closing the transport section from the open state, adjust the DF open SW plate so that the clearance between the glass surface Open the paper feed cover. and the DF spacers L and R (front side) is 10 ∼ 40mm. Then tighten Loosen two fixing screws of the tray guide top, and remove two the fixing screw.
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Page 19: 7 ] Connector Layout
[Note for assembly] [7] CONNECTOR LAYOUT When installing the original transport belt, put the right and left in parallel, and allow the same clearance between the spacer and the belt in the front side and in the rear side. 1. Control PWB peripheral Spacer Spacer Belt unit... - Page 20 2. Paper feed motor peripheral 4. Paper feed unit Drive F harness Paper feed motor (DFM) Paper feed motor ASM-sensor 2 rotation sensor Original feed sensor (DFD) Paper feed guide switch (FGOD) Original width sensor (DWS) ASM-earth lead W Original set SENSOR 2 harness sensor (DSS) Original timing sensor (DTD)
- Page 21 7. Reverse unit section 9. ADF open/close switch peripheral (Reversing sensor peripheral) ADF open/close switch (AUOD) Reversing guide switch (TGOD) ASM0RU ASM-LED Reversing sensor (RDD) ASM-drive IF 8. Paper feed section in the DF cover ASM-drive F ASM-LED ASM-TR2 ASM-sensor 2 ASM-LED ASM-sensor 1 LED PWB...
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Page 22: 8 ] Replacement Parts And Maintenance
2. Mode setting in the test mode when supplying the power [8] REPLACEMENT PARTS AND Switch MAINTENANCE Push switch RADF individual unit PPC main body operation test mode connection mode DIP switch 1 For AB series For inch series 1. Replacement parts DIP switch 2 Thin paper mode Normal paper mode... - Page 23 (6) Thin paper duplex paper pass mode (9) Resist sensor adjustment mode When originals are set on the paper feed tray, the original feed LED (10) Timing sensor adjustment mode lights up. When the push switch is pressed, all the originals on the tray are fed.
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Page 24: 9 ] Troubleshooting
B. Motor error (DFM) [9] TROUBLESHOOTING (Common to SF-A18/A57) A. ADF does not operate. (Common to SF-A18/A57) Is the load Adjust the mechanism load and the drive system, and at the motor shaft normal ? remove foreign materials. Is the interface Check or replace the harness connected harness. - Page 25 Replace the motor. PWB. PWB. Replace the harness. Replace the harness. (*) DTM: Between CN4-5 and CN4-3, -4 Between CN 4-6 and CN4-1, -2 DRM: Between CN7-3 and CN4-7, -8 (SF-A57 only) Between CN7-4 and CN4-5, -6 (SF-A57 only) – 24 –...
- Page 26 E. Sensor error (DLS1, DLS2, DED, DSS, G. Solenoid error (DFSOL, DRSOL) DWS, DFMRS) (Common to SF-A18/A57) (Common to SF-A18/A57) DRSOL DRSOL Is the sensor Connect the harness harness connected Is the properly. properly ? solenoid positioned Adjust. properly ? Is the harness Replace the harness.
- Page 27 I. Originals cannot be reversed. J. Paper jam (SF-A18 only) (Common to SF-A18/A57) Is the Visually check and machine free from remove the paper jam. paper jam ? Is the roller in Adjust the mechanism load the reversing section and the drive system and free from paper dust remove foreign materials.
- Page 28 K. Paper jam (SF-A-57 only) L. Fan motor error (Common to SF-A18/A57) Is the Visually check and machine free from remove the paper jam. paper jam ? Is the motor harness connected Connect the harness. properly ? Is the original feed sensor (DFD) normal ? Is the harness...
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Page 29: [10] Electrical Section
9.83MHz circuit Original set DC+24V Power input sensor input circuit circuit DC+24V Rush current SGND prevention Cover AUOD circuit open/close FGOD PGND switch input TGOD circuit DC+24V SF-A57 only Power SGND SF-A18 only PGND – 28 –... - Page 30 3. Operations A. Sensor input circuit [a] Original timing sensor (DTD) The original timing sensor is a reflection type sensor, and the LED and the photo transistor are integrated into one. Infrared light emitted from the LED is reflected by the mirror on the opposite side, and the reflected light enters the photo transistor to increase the photo current in the photo transistor, detecting "No original."...
- Page 31 [b] Original feed sensor (DFD) The original feed sensor is a reflection type sensor, and the LED and the photo transistor form a pair. Infrared light emitted from the LED is reflected by the mirror on the opposite side, and the reflected light enters the photo transistor to increase the photo current in the photo transistor, detecting "No original."...
- Page 32 [c] Reverse sensor (RDD) --- SF-A57 only The reverse sensor is a reflection type sensor, and the LED and the photo transistor are integrated into one. Infrared light emitted from the LED is reflected by the mirror on the opposite side, and the reflected light enters the photo transistor to increase the photo current in the photo transistor, detecting "No original."...
- Page 33 [d] Paper exit sensor (DES) --- SF-A18 only The DES uses a photo interrupter which is integrated with the light emitting diode and the photo transistor. When there is an original, the lever-type actuator interrupts the optical path. The signal is passed the noise filter composed of R25, C15 and Schmidt trigger invertor (IC4) to the CPU (IC11 77 pin).
- Page 34 [g] Original set sensor (DSS) The DSS uses a photo interrupter which is integrated with a light emitting diode and a photo transistor. The signal is passed through the noise filter composed of R23, C16, and Schmidt trigger invertor (IC4) to the gate array (IC7 53 pin), then passed through the data bus to the CPU. R101 TLP1240(C5) (IC7)
- Page 35 B. Solenoid drive circuit [a] Paper feed solenoid (DFSOL), reverse solenoid (DRSOL) drive circuit (DRSOL --- SF-A57 only) This circuit drives the weight plate which presses the bundle of originals on the tray, the paper feed solenoid which drives the paper feed section shutter, and the reverse solenoid which drives the reverse guide to lead an original to the reverse path when reversing.
- Page 36 D. Other circuit [a] EEPROM (IC3) circuit This circuit serves as a memory to save the sensitivity data of the reflection type sensors, the adjustment values such as the original set position on the original table, and the counter values such as the number of originals passed. Data communication with the CPU (IC11) is performed with the 3-wire serial interface.
- Page 37 [c] Paper feed motor (DFM) drive circuit This circuit controls the paper feed motor rotation and stop and the rotating direction. It is composed of the G/A (IC7) and the exclusive hybrid IC (IC10), etc. The motor rotation, stop, and rotating direction are controlled by the combination of binary logics inputted to the G/A through the data bus from the CPU.
- Page 38 By varying the PWM signal duty, a desired motor current value can be obtained. [e] Reverse motor (DRM) drive circuit --- SF-A57 only This circuit controls the reverse motor rotation/stop, the rotating direction, and the motor current, and is composed of the CPU (IC11), the constant-current chopper system driver IC (IC12), and the G/A (IC7).
- Page 39 [f] Paper feed motor (DFM) current limiting circuit This circuit limits the motor start current to a constant level, and is composed of the resistor for detection of the current value and the voltage comparator. The negative voltage side of the paper feed motor is connected to the;pickup resistor composed of R97, R98, and R99, which converts the current flowing in the driver circuit into a voltage value.
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Page 40: Circuit Diagram
– 39 –... - Page 41 – 40 –...
- Page 42 CONTROL PWB (SF-A18) LED PWB SENSOR PWB – 41 –...
- Page 43 – 42 –...
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- Page 46 CONTROL PWB (SF-A57) LED PWB SENSOR PWB – 45 –...
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- Page 48 COPYRIGHT 1996 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 49 ¤Ï…–‘|M (Transport belt section) ߤÏM 1 (Paper feeding transport section 1) ߤÏM 2 (Paper feeding transport section 2) SF-A57 8¤ÏM (SF-A57 Reversion transport section) SF-A18 8¤ÏM (SF-A18 Reversion transport section) ß|’jM (Paper feedig tray section) ª}© ž¤« (Packing material & Accessories) SF-A57 PBA- r•|“h‘#Ô...
- Page 50 SF-A18 SF-A57 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.
- Page 51 SF-A18 SF-A57 (Exteriors) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK DF 0CW2214K114// DF cover sub ass’y (SF-A57) DF 0CW2215K050// DF cover sub ass’y (SF-A18) 0CW2214P127// Lower cover R 0CW2214K022// Hinge R ass’y...
- Page 52 SF-A18 SF-A57 (Exteriors) SF-A57 SF-A18 SF-A18 15 35 FCP01610 – 3 –...
- Page 53 SF-A18 SF-A57 (Transport belt section) Japan only Except Japan Except Japan Except Japan SF-A57 SF-A18 Except Japan Except Japan Except Japan SF-A18 Japan only FCP01611 – 4 –...
- Page 54 SF-A18 SF-A57 (Transport belt section) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK MG 5;,0) 0CW2214P114// MG catch holder 0CW2214P111// DF : F DF side plate F 0CW2214P043// DF % L DF spacer L % 0CW2214P044//...
- Page 55 SF-A18 SF-A57 1(Paper feeding transport section 1) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK >1 ' 0CW2214P023// Lever 0CW2214P036// ; & Shutter link 0CWE450000871 3 Snap band (SG-110) 081 0CW2214P021// Weight lever 0CW2214P403// :1? Solenoid (SOL-TDS-10SL-102)
- Page 56 SF-A18 SF-A57 1(Paper feeding transport section 1) 10 9 66 50 22 23 49 48 46 FCP01612 – 7 –...
- Page 57 SF-A18 SF-A57 2 (Paper feeding transport section 2) 75 76 FCP01613 – 8 –...
- Page 58 SF-A18 SF-A57 2 (Paper feeding transport section 2) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK 14 ) 0CW2214P102// Tray connector bracket 0CW2214K201// ASM-TR2 ASM-TR2 harness 0CW2214P343// -* Pick up sheet 0CWE450000896 Clamp (UAMS-02WH-2) 0CW2214P006//...
- Page 59 R 2 0CW2158P030// R sensor cover $ 0CW2214P454// -7 * Sheet $' 0CW2158P348// 90. Noise protecter SF-A57 (SF-A57 Reversion transport section) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK SOL ) 0CW2214P113// Flapper solenoid bracket 0CWE450000574 ...
- Page 60 SF-A18 SF-A57 SF-A57 (SF-A57 Reversion transport section) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK !2 0CW2214P046// Turn over sensor cover H 2 * 0CW2214P383// H sensor lower sheet $ 0CW2214P335// R R flapper spring ASM- E ...
- Page 61 SF-A18 SF-A57 SF-A18 (SF-A18 Reversion transport section) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK + 0CW2215P302// Delivery roller 0CW2215P101// : F Delivery side plate F 0CW2215K210// ASM- -2 15 ASM-earth wire 15 2 # 0CW2215K001// Delivery sensor ass’y...
- Page 62 SF-A18 SF-A57 (Paper feedig tray section) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK 1 0CW2214P016// Tray cover 0CW2214P005// < R Slide holder R 0CW2214P004// 1 Tray rack < F 0CW2214P039// Slide holder F 0CW2214K213//...
- Page 63 SF-A18 SF-A57 (Packing material & Accessories) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK 05;- R PCOVP0911FCZZ Upper exterior rear cover R PCOVP0941FCZZ 05;- L Upper exterior rear cover L 0CW040080FNBI Screw (4 ...
- Page 64 SF-A18 SF-A57 SF-A57 PBA- ! "# $% (SF-A57 PBA-Control PWB) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK 4! 0CWE73423M106 Capacitor (CESEM1E100-F) [C10,C11] Capacitor (GRM40F104Z25PT) 0CWE73303Z104 4! [C35∼C39,C42∼C44,C46,C47,C49,C50] 0CWE73268J101 4! Capacitor (GRM40CH101J50PT) [C32,C33] Capacitor (GRM40F105Z16PT) 0CWE73303Z105 4! [C41,C45,C48,C51,C52,C59∼C62] 0CWE73431M107...
- Page 65 SF-A18 SF-A57 SF-A57 PBA- ! "# $% (SF-A57 PBA-Control PWB) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK Resistor (CRG10G472J) !40 0CWE70188J472 [R15,R31,R51,R52,R55∼R60,R62,R65,R68,R71,R77] !40 0CWE70188J102 Resistor (CRG10G102J) [R14,R61,R82,R83,R88] $ 0CWE70188J105 !40 Resistor (CRG10G105J) [R76,R90] ' 0CWE70188J821 !40 Resistor (CRG10G821J) [R91]...
- Page 66 SF-A18 SF-A57 & SF-A18 PBA- ! "# $% (SF-A18 PBA-Control PWB) PRICE RANK PART PARTS CODE DESCRIPTION MARK RANK . 0CWE311001019 Diode (S1G-G11) [D9,D10] $ 0CWE77002373A IC (TC74HC373AF) [IC1] ' 0CWE74269BK28 IC :) IC socket (2-641605-3) [for IC2] 0CWE7700214A/ IC (TC74HC14AF)
- Page 67 SF-A18 SF-A57 è )NDEX PRICE R. PRICE R. PARTS CODE PARTS CODE 0CWE450000070 AB DJ PCOVP0911FCZZ AB DD 0CWE450000071 AC DJ PCOVP0941FCZZ AB DD 0CWE450000368 AD DJ " AD DJ XRESP20-04000 AA DD 0CWE450000433 AB DD " AA DD "...
- Page 68 SF-A18 SF-A57 PRICE R. PRICE R. PARTS CODE PARTS CODE 0CWE70213JR39 AC DJ 0CW030060FZSW AA DD " AC DJ 0CW030060FZTP AA DD 0CWE73268J101 AF DS " AA DD " AF DS " AA DD 0CWE73303Z104 AB DJ " AA DD "...
- Page 69 SF-A18 SF-A57 PRICE R. PRICE R. PARTS CODE PARTS CODE 0CW2185P358// AB DJ 0CW2214P037// AH DX 0CW2185P359// AB DJ 0CW2214P038// AE DJ 0CW2198P003// AH DX 0CW2214P039// AG DS 0CW2198P302// AD DJ 0CW2214P040// AM EG 0CW2198P360// AR EQ 0CW2214P041// AF DS...
- Page 70 SF-A18 SF-A57 PRICE R. PRICE R. PARTS CODE PARTS CODE 0CW2214P323// AV FG 0CW2215K002// AK DX 0CW2214P328// AS EQ 0CW2215K031// BG GT 0CW2214P331// BD GN 0CW2215K032// BF GN 0CW2214P332// AV FG 0CW2215K050// BS MW 0CW2214P335// AD DJ 0CW2215K210// AG DX...