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Sharp FO-1850 Service Manual

Sharp fo-1850 facsimile service manual
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Download this manual See also: Operating Manual
[1] Specifications . . . . . . . . . . . . . . . . . . . . . 1-1
[2] Operation panel . . . . . . . . . . . . . . . . . . . . 1-2
[3] Transmittable documents . . . . . . . . . . . . 1-3
[4] Installation . . . . . . . . . . . . . . . . . . . . . . . . 1-4
[5] Quick reference guide . . . . . . . . . . . . . . . 1-9
[1] Adjustments . . . . . . . . . . . . . . . . . . . . . . . 2-1
[3] Troubleshooting . . . . . . . . . . . . . . . . . . . 2-19
[4] Error code table . . . . . . . . . . . . . . . . . . . 2-20
[1] General description . . . . . . . . . . . . . . . . . 3-1
procedures . . . . . . . . . . . . . . . . . . . . 3-4
[1] Block diagram . . . . . . . . . . . . . . . . . . . . . 4-1
[2] Wiring diagram . . . . . . . . . . . . . . . . . . . . 4-2
[3] Point-to-point diagram . . . . . . . . . . . . . . . 4-3
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
FACSIMILE
MODEL
[1] Circuit description . . . . . . . . . . . . . . . . . .5-1
power supply PWB . . . . . . . . . . . . .5-11
[1] Control PWB circuit . . . . . . . . . . . . . . . . .6-1
[2] TEL/LIU PWB circuit . . . . . . . . . . . . . . .6-10
[3] Power supply PWB circuit . . . . . . . . . . .6-12
[4] CCD PWB circuit . . . . . . . . . . . . . . . . . .6-14
[5] Operation panel PWB circuit . . . . . . . . .6-15
[6] Joint PWB circuit . . . . . . . . . . . . . . . . . .6-17
[7] Multifunction interface PWB circuit . . . .6-19
[1] Protocol . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
[2] Power on sequence . . . . . . . . . . . . . . . . .7-2
[1] Service tools . . . . . . . . . . . . . . . . . . . . . .8-1
[2] IC signal name . . . . . . . . . . . . . . . . . . . . .8-4
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
FO-1850TH
No. 00ZF1850THSME
FO-1850

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  • Page 1: Table Of Contents

    FO-1850TH SERVICE MANUAL No. 00ZF1850THSME FACSIMILE FO-1850 MODEL CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 5. CIRCUIT DESCRIPTION [1] Specifications ..... 1-1 [1] Circuit description .
  • Page 2 FO-1850TH 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 equipment manufacturer.

  • Page 3: Chapter 1. General Description

    Length: 128 to 1000 mm As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for procduct improvement without prior notice. The performance specifications figures indicated are nominal values of production units. There may be some deviation from these values in individual units.

  • Page 4: Operation Panel

    FO-1850TH [2] Operation panel Display This displays various messages during operation and programming. REMINDER key REDIAL key Press this key to send a Press this key to RECEPTION MODE key fax and/or voice message automatically redial Press this key to select the to another party or yourself the last number dialed.

  • Page 5: Transmittable Documents

    FO-1850TH 5. Automatic Document Feeder Capacity [3] Transmittable documents Number of pages that can be placed into the feeder at anytime is as 1. Document Sizes follows: Normal size: max. ADF 20 sheets width 148 – 216 mm Normal size Special size: single sheet only (manual feed) length 128 –...

  • Page 6: Installation

    FO-1850TH 7. Use of Document Carrier Sheet TELEPHONE JACK A standard RJ11C telephone jack must be located near the machine. A document carrier sheet must be used for the following documents. This is the telephone jack commonly used in most homes and offices. •...
  • Page 7 FO-1850TH Take the new film out of its package, and insert two of the gears Insert the empty spool into the back of the compartment so that provided with the fax into the ends of the spool with film. the gear and the flange fit into the slots on the sides of the Make sure that the two tabs on the gears fit properly into the slots compartment.
  • Page 8 Up to 300 sheets of A4 size paper from 60 to 90 can be loaded in the tray. For the best results, we recommend that you use Sharp FO-16NC (A4 size) or paper. If the paper tray is in the fax machine, remove the cover. Grasp the end of the paper tray, lift it slightly, and pull it out of the fax machine.
  • Page 9 " " key two times, and then press "1" to select regular, or "2" to select Sharp high quality paper. When finished, press the STOP key. Be sure to change this setting again if you change back to regular paper.
  • Page 10 FO-1850TH Gently pull the jammed paper out of the printing compartment. Wind the film slightly (rotate the gear on the right side of the rear spool) so that there is no slack in the film. Make sure that both edges of the film wind onto the spool evenly. Replace the imaging film, making sure that the flange goes into the rear slot on the left side of the printing compartment.

  • Page 11: Quick Reference Guide

    FO-1850TH 6. Connecting the Multifunction interface box The Multifunction Interface kit which comes with your fax machine allows you to use your fax as a printer and scanner, and lets you perform fax operations from your computer via the fax modem in your fax machine.
  • Page 12 FO-1850TH INSTALLATION SETTING THE DATE & TIME FUNCTION To set date and time, press the following sequence of keys: "DATE & TIME SET" will appear. S T A R T Press the START key: Enter two digits for the Date (01 through 31). Enter two digits for the Month (01 through 12).
  • Page 13 FO-1850TH RECORDING AN OUTGOING MESSAGE DELETING MESSAGES The answering machine in your fax has four boxes for recording incoming voice Erasing a single message: messages when it is set to ANS reception mode. The General Box is for general Press the DELETE key white the message is being played. messages, and Box 1, Box 2, and Box 3 are each for personal messages.

  • Page 14: Chapter 2. Adjustments

    FO-1850TH (1) F100 (ICP-S07) is installed in order to protect IC’s from an over- CHAPTER 2. ADJUSTMENTS current generated in the motor drive circuit. If F100 is open, re- place it with a new one. 3. Settings [1] Adjustments (1) Dial mode selector General DIAL mode (Soft Switch No.

  • Page 15: Diagnostics And Service Soft Switch

    FO-1850TH [2] Diagnostics and service soft switch 1. Operating procedure (1) Entering the diagnostic mode Press FUNC → 9 → → 8 → # → 7 , and the following display will appear. ROM Ver. FAZ0 After 2 sec: DIAG MODE FAZ0 Then press the START key and country name selected by country select will appear.
  • Page 16 FO-1850TH 3. Diagnostic items description 3. 6. Signal send mode This mode is used to send various signals to the line. 3. 1. Soft switch setting mode FAX signals are sent in the level set by the soft switch. Used to change the soft switch settings. [1] No signal [8] V.29 9600bps The soft switch which is stored internally is set by using the keys.
  • Page 17 FO-1850TH 3. 12. Entry data receive 3. 13. Flash memory check This mode is used to receive the registered data which is sent from Data is written into and read from the flash memory to check the data the remote machine and to register the received data in the machine. conformity.
  • Page 18 FO-1850TH 5. Soft switch description • Soft switch Switch setting and function DATA Initial ITEM Remarks setting Protect from echo Forced 4800 BPS reception Footer print Length limitation of copy/send/receive No limit Copy/send: 1m Receive: 1.5m CSI transmission No transmitted Transmitted DIS receive acknowledgement during G3 Twice...
  • Page 19 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Auto gain control (MODEM) Enable Disable End Buzzer Disconnect the line when DIS is received in RX mode Equalizer freeze control (MODEM) Equalizer freeze control 7200 BPS only Reserved Reserved Reserved Recall interval Binary input...
  • Page 20 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting DTMF signal transmission level (High) Binary input No. = 16 8 4 2 1 1 2 3 4 5 0 0 1 1 1 Reserved Reserved Reserved Reading slice (Binary) Light Dark Factory...
  • Page 21 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Pseudo ringer sound output level to the line Binary input No. = 8 4 2 1 1 2 3 4 0 0 0 0 Reserved Reserved Reserved Reserved DTMF detection time 50ms 80ms 100ms...
  • Page 22 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Busy tone detection ON/OFF time (Lower 350ms 200ms duration) Busy tone detection ON/OFF time (Upper 650ms 900ms duration) Reserved Busy tone continuous sound detect time Busy tone detect continuation sound detect during OGM Busy tone detect continuation sound detect (during ICM: for internal A.M.)
  • Page 23 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Reserved Reserved Two way record function Disable Enable Tall saver function Disable Enable OPTION Reserved Reserved BOX selection to record ICM 2 digits DTMF 1 digit DTMF Reserved AGC maximum gain setting (line) Binary input (10~25dBm) (1dBm step) No.
  • Page 24 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Reserved Reserved Polling key OPTION Reserved Reserved Speaker volume (5 stages) Very Low Middle High Very High OPTION No. 6 No. 7 No. 8 Automatic cover sheet OPTION Communication results printout E/T/M Always No print Err only OPTION...
  • Page 25 FO-1850TH Switch setting and function DATA Initial ITEM Remarks setting Serial port speed during communication in 2400bps 19200bps PC I/F mode No. 1 No. 2 No. 3 No. 4 Serial port speed during no-communication 2400bps 19200bps in PC I/F mode No.
  • Page 26 FO-1850TH • Soft switch function description SW-A2 No. 7 Communication error treatment in RTN sending mode (Reception) SW-A1 No. 1 Protect from echo Used to determine communication error treatment when RTN is sent Used to protect from echo in reception. by occurrence of a received image error in G3 reception.
  • Page 27 FO-1850TH SW-A5 No. 5, No. 6 Reserved SW-B4 No. 3 Dial mode Set to "0". When using the pulse dial, set to 1. When using the tone dial, set to SW-A5 No. 7 Error criterion SW-B4 No. 4 Pulse → Tone change function by Used to select error criterion for sending back RTN when receiving image data.
  • Page 28 FO-1850TH SW-D2 No. 1 ~ No. 3 Reserved SW-F1 No. 1, No. 2 DTMF detect time Set to "0". Used to set detect time of DTMF (Dual Tone Multi Frequency) used in remote reception (5 SW-D2 No. 4 Distinctive ringing detection The longer the detect time is, the less the error detection is caused by Set to "1"...
  • Page 29 FO-1850TH SW-H1 No. 3 Reserved SW-I2 No. 8 Reserved Set to "0". Set to "0". SW-H1 No. 4 Busy tone continuous sound detect time SW-I3 No. 1, No. 2 Reserved Set detecting time busy tone for 5 seconds or as is PTT. Set to "0".
  • Page 30 FO-1850TH SW-I5 No. 5 ~ No. 8 AGC eref access code (Mic) SW-I7 No. 6 Frequency of voice detection after REMINDER dial- (-0~-30dBm) (2dBm step) The AGC Eref Access Code (parameter 55) controls the playback When reminder calling, machine will detect the voice signal and start level.
  • Page 31 FO-1850TH SW-K1 No. 1 Entering DIAG mode by pressing SPEED key A bit which is used in the production process only. When the SPEED key is pressed, the switch is changed from the stand-by state to the DIAG mode. SW-K1 No. 2 ~ No. 8 Reserved Set to "0".

  • Page 32: Troubleshooting

    FO-1850TH [3] Troubleshooting • Refer to the following actions to troubleshoot any of problems men- Apply line equalization SOFT SWITCH A5-1, 2. tioned in 1-4. May be used in case [1] [2] [3] [4]. • A communication error occurs. Slow down the transmission speed SOFT SWITCH A2-1, 2, 3, 4.

  • Page 33: Error Code Table

    FO-1850TH [4] Error code table 1. Communication error code table G3 Transmission Code Final received signal Error Condition (Receiver side) Incomplete signal frame Cannot recognize bit stream after flag NSF, DIS Cannot recognize DCS signal by echo etc. Cannot recognize NSS signal (FIF code etc) Disconnects line during reception (carrier missing etc) Disconnects line by fall back Disconnects line during reception of multi page...

  • Page 34: Chapter 3. Mechanism Blocks

    FO-1850TH 3-2. Automatic document feed CHAPTER 3. MECHANISM BLOCKS 1) Use of the paper feed roller and separation rubber plate ensures error-free transport and separation of documents. The plate spring presses the document to the paper feed roller to assure smooth [1] General description feeding of the document.
  • Page 35 FO-1850TH 5. Optical system (1) General view Last page of document Separation rubber Rear sheet CCD PWB Back of document Paper feed spring Document Red mark LED lamp Fast page of document Paper feed roller Reader glass Mirror 2 Fig. 4 Lens Mirror 3 Mirror 1...
  • Page 36 FO-1850TH 6. Recording block (1) General view Imaging film Ink detection switch Head frame Tape-up side Thermal head Document guide guide,lower Supply side Pinch roller PE sensor lever Pinch roller 2 PU roller roller Rotation Platen plate roller P-IN sensor lever Paper cassette lever RF roller Paper cassette...

  • Page 37: Disassembly And Assembly

    FO-1850TH [2] Disassembly and assembly procedures • This chapter mainly describes the disassembly procedures. For the assembly procedures, reverse the disassembly procedures. • Easy and simple disassembly/assembly procedures of some parts and units are omitted. For disassembly and assembly of such parts and units, refer to the Parts List.
  • Page 38 FO-1850TH Parts list (Fig. 2) Top cover and paper out guide unit Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Mechanism unit according to procedure 1-a. Screw (3×6) b. Remove the top cover and paper out guide unit from the Pinion gear mechanism unit according to the flowchart.
  • Page 39 FO-1850TH Paper out guide and head frame unit Parts list (Fig. 3) Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit PO pinch roller spring according to procedure 1-a. PO pinch roller b. Remove the top cover and paper out guide unit from the Arm up spring mechanism unit according to procedure 2-b.
  • Page 40 FO-1850TH Parts list (Fig. 4) Head frame and thermal head Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Head frame unit Head support spring according to procedure 1-a. Screw (3×8) Head spring F Earth cable Head spring K b.
  • Page 41 FO-1850TH Operation panel unit and document guide lower Parts list (Fig. 5) Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Mechanism unit Document guide according to procedure 1-a. lower unit Screw (3×8) Stopper plate Feed gear ass’y b.
  • Page 42 FO-1850TH Parts list (Fig. 6) Document guide upper Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Operation panel unit Separate spring according to procedure 1-a. Screw (3×10) Separate plate Separation rubber Document guide upper b.
  • Page 43 FO-1850TH Parts list (Fig. 7) Operation panel Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Operation panel unit Stop key according to procedure 1-a. Screw (2×6) Volume key Operation panel PWB Mode key A b.
  • Page 44 FO-1850TH Handset cover, optical unit, Parts list (Fig. 8) Part name Q’ty Part name Q’ty drive unit and joint PWB unit Mechanism unit Dustproof sheet, left Screw (3×8) Dustproof sheet, right a. Remove the bottom plate ass’y from the mechanism unit according to procedure 1-a.
  • Page 45 FO-1850TH Optical frame Parts list (Fig. 9) Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Optical unit according to procedure 1-a. Screw (Red) Shield sheet 3 CCD PWB unit Mirror 3 b. Remove the top cover and paper out guide unit from the mechanism unit according to procedure 2-b.
  • Page 46 FO-1850TH Parts list (Fig. 10) Drive plate Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Drive unit Reduction gear B according to procedure 1-a. Screw (3×8) Planet lever 4 ass’y Motor Planet lever 3 ass’y b.
  • Page 47 FO-1850TH Parts list (Fig. 11) Transfer roller etc. and speaker Part name Q’ty Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Mechanism unit Back tension gear according to procedure 1-a. PO belt Back tension felt PF gear Slip spring b.
  • Page 48 FO-1850TH Parts list (Fig. 12) PWB section Part name Q’ty a. Remove the bottom plate ass’y from the mechanism unit Bottom plate according to procedure 1-a. Screw (3×6) b. Remove the PWB’s and AC cord from the bottom plate Screw (3×5) according to the flowchart.
  • Page 49 FO-1850TH Parts list (Fig. 13) Wire treatment Part name Q’ty a. Perform wire treatment carefully and deliberately. UL tape b. For wire treatment procedures which are not described in this Band section, refer to the section for that portion of the unit. Core Core Screw (3×6)

  • Page 50: Chapter 4. Diagrams

    FO-1850TH CHAPTER 4. DIAGRAMS 4 – 1...
  • Page 51 FO-1850TH 4 – 2...
  • Page 52 FO-1850TH 4 – 3...

  • Page 53: Chapter 5. Circuit Description

    FO-1850TH 3. Operational description CHAPTER 5. CIRCUIT DESCRIPTION Operational descriptions are given below: • Transmission operation [1] Circuit description When a document is loaded in standby mode, the state of the document sensor is sensed via the 1 chip fax engine (XFC-MVP). If the sensor signal was on, the motor is started to bring the 1.

  • Page 54: Circuit Description Of Control Pwb

    FO-1850TH 2) 27C040 (IC2): pin-32 DIP (ROM) [2] Circuit description of control PWB EPROM of 4Mbit equipped with software for the main CPU. 1. General description 3) SRM2B257SL70 (IC6): pin-28 SOP (RAM) Fig. 2 shows the functional blocks of the control PWB, which is com- Line memory for the main CPU system RAM area and coding/decod- posed of 5 blocks.
  • Page 55 FO-1850TH XFC-MVP (IC3) Terminal descriptions Input Output Pin Description Pin Name Pin No. Type Type (Active low signals have an "n" pin name ending.) CPU Control Interface − MIRQn Modem interrupt, active low. (Hysteresis In, Internal Pullup.) − SYSCLK System clock. (Hysteresis In.) −...
  • Page 56 FO-1850TH XFC-MVP (IC3) Terminal descriptions Input Output Pin Name Pin No. Pin Description Type Type Operator Panel Interface − OPO[7:0] [38:40][42:44] Keyboard/LED strobe [7:0]. [46:47] − OPI[3:0] [49:52] Keyboard return [3:0]. (Pullup. Hysteresis In.) − LEDCTL Indicates outputs OPO [7:0] are for LEDs. −...
  • Page 57 FO-1850TH (2) Panel control block The following controls are performed by the XFC-MVP. • Operation panel key scanning • Operation panel LCD display (3) Mechanism/recording control block The following controls are performed by XFC-MVP. • Motor control • Thermal head control •...
  • Page 58 FO-1850TH FEATURES (4) Modem (R144V24) block • Group 3 facsimile transmission/reception INTRODUCTION ® – The Rockwell RFX144V24-S23 and RFX96V24-S23 MONOFAX ITU-T V.17 and V.33 (RFX144 models) facsimile modem family provides 14400 bps and 9600 bps half-du- – ITU-T V.29, V.27 ter, T.30, V.21 Channel 2, T.4 plex capability with options supporting DigiTalk™...
  • Page 59 FO-1850TH R144V24 (IC4) Hardware Interface Signals Pin No. Signal Name I/O Type GPI7/RINGD Pin Signals – 100-Pin PQFP GPO7 Pin No. Signal Name I/O Type GPO6 GPO5 GPO4 GPO3 DGND2 VDD1 IRQ1 IA/OB GPO2 IA/OB GPO1 IA/OB GPO0 IA/OB RESET IA/OB XTLI IA/OB...
  • Page 60 FO-1850TH (5) Image signal process block AMPLIFIER CLAMP VIDEO CIRCUIT CIRCUIT SIGNAL XFC-MVP CLOCK VREF+ VREF– Fig. 5 The CCD is driven by the 1-chip engine (XFC-MVP), and the output video signal from the CCD is input into the XFC-MVP through the amplifying circuit and clamp circuit.

  • Page 61: Circuit Description Of Tel/Liu Pwb

    FO-1850TH [3] Circuit description of TEL/LIU PWB (1) TEL/LIU block operational description 1) Block diagram LIU PWB CONTROL PWB SEL A SEL A GAIN-C SEL C TXCONT SIG TX TXOUT MODEM (R144V24) LINE EXT. DETECTOR SIG RX RXIN RXCONT MONITOR Handset MPX B TELIN...
  • Page 62 FO-1850TH 2. On-hook status detection circuit 9. Signal selection The on-hook status detection circuit detects the Status of the hook The following signals are used to control the transmission line of switch (RHS) of Built-in telephone, and the status of the hook of a TEL/FAX signal.
  • Page 63 FO-1850TH [Signals for status recognition according to input signals] 10. Sensor circuit Signal Name Function For the recording paper sensor (P.E), when there is recording paper, the photo transistor in the light receiving side is ON and the H: The handset is in the on-hook state. detection level is LOW.

  • Page 64: Circuit Description Of Ccd Pwb

    Q1, and discharged to the secondary winding during OFF period. Maker: LITTELE Type: 2151.25ME600 Rating: T1.25AH 250V Sharp code: 0CBPJCTY1251/ (2) Description of blocks [5] Circuit description of CCD PWB The CCD board picks up optical information from the document, con- 1.
  • Page 65 FO-1850TH M E M O 5 – 13...

  • Page 66: Chapter 6. Circuit Schematics And Parts Layout

    FO-1850TH CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT R160 R161 R162 R136 R135 BATRST R134 4.7/25 R133 R132 VBAT R187 L108 C148 Z2139 2200P (7-4A) TSTCLK RESET SYSCLK (3-2G) SYSCLK (5-1D) PWRDWN MIRQ R281 (3-3B) MIRQ XOUT R192 RESET R191 R195 C131 DEBUG...
  • Page 67 FO-1850TH C199 6 – 2...
  • Page 68 FO-1850TH C135 C225 TRESET 51,91 SAICLK 42,49 TSTROBE 34,41 IAICLK 32,33 CLKIN 22,31 IACLK TXDAT SR4OUT RXOUT DGND4 SR3IN DGND3 RMODE L109 TMODE Z2131 SR1IO VDD3 DGND2 XTLO L112 Z2131 VDD2 DGND5 DGND1 XTLI L111 C180 Z2131 VDD1 EYESYNC EYECLK DCLK EYEXY RLSD...
  • Page 69 FO-1850TH C120 3300P 6 – 4...
  • Page 70 FO-1850TH R164 4.7K R165 4.7K VOUT MANUAL RESET 6 – 5...
  • Page 71 FO-1850TH IC10 MC14053DR2 6 – 6...
  • Page 72 FO-1850TH C103 C101 C107 C102 6 – 7...
  • Page 73 FO-1850TH Control PWB parts layout (Top side) 6 – 8...
  • Page 74 FO-1850TH Control PWB parts layout (Bottom side) 6 – 9...
  • Page 75 FO-1850TH 2SC1740 N.M. 6 – 10...
  • Page 76 FO-1850TH TEL/LIU PWB parts layout 6 – 11...
  • Page 77 FO-1850TH RB30FB MTZJT72 6.2B MTZJT72 3.6A (1/2W) 2200P N.M. RL1N4005 RL1N4005 6 – 12...
  • Page 78 FO-1850TH Power supply PWB parts layout 6 – 13...
  • Page 79 FO-1850TH Φ1 Φ2 6 – 14...
  • Page 80 FO-1850TH 100K 100K 100K 100K 100K 100K 100K 100K 100K 6 – 15...
  • Page 81 FO-1850TH Operation panel PWB parts layout 6 – 16...
  • Page 82 FO-1850TH 6 – 17...
  • Page 83 FO-1850TH Joint PWB parts layout 6 – 18...
  • Page 84 FO-1850TH 6 – 19...
  • Page 85 FO-1850TH Multifunction interface PWB parts layout (Top side) Multifunction interface PWB parts layout (Bottom side) 6 – 20...

  • Page 86: Chapter 7. Operation Flowchart

    FO-1850TH CHAPTER 7. OPERATION FLOWCHART [1] Protocol Receive side Transmitter side G3 communication (Document inserted into document sensor during standby) To recording position Document inserted to the reading position (DCS) (DCS) 1st page Next page insert command Cut line printed Cut line printed Recording papor ejected Document ejected...

  • Page 87: Power On Sequence

    FO-1850TH [2] Power on sequence START CPU initialized MODEM initialized “WAIT A MOMENT” display STOP key ? “MEMORY CLEAR ?” display 3 sec ? STAND-BY START key ? COPY key ? STOP key ? “MEMORY CLEARED” display “MEMORY CLEARED” display 3 sec ? Memory clear Memory clear...

  • Page 88: Chapter 8. Others [1] Service Tools

    FO-1850TH CHAPTER 8. OTHERS [1] Service tools 1. List PRICE PARTS CODE DESCRIPTION Q’TY RANK C PWB S 2 8 2 5 S C 0 1 Extension board unit U K OGM 2 0 5 7 S C Z Z Optical adjustment jig Extension board unit Extension board unit...
  • Page 89 FO-1850TH 2. Description 2-1. Extension board unit 1. Remove the TEL/LIU PWB, control PWB and Power Supply PWB from this unit, and mount the extension board unit instead. • Before connecting the wiring to the extension board unit, set the test PWB switches to the fixed position. 2.
  • Page 90 FO-1850TH 2-2. Scan optical system adjustment Lightly loosen the red screws of the CCD pwb and obtain the VID signal waveform in synchronization with φT signal waveform. Ad- (1) Outline just the CCD pwb positioning to obtain the waveform as shown The adjustment procedures of the scan optical system are described below.

  • Page 91: Ic Signal Name

    FO-1850TH [2] IC signal name CONTROL PWB UNIT IC104: VHiNJM4558MF-(NJM4558M) IC6: VHiS2B257SL70 (SRM2B257SL70) OUTPUT 1 (TOP VIEW) INVERTING INPUT 1 OUTPUT 2 – NON-INVERTING INPUT 1 INVERTING INPUT 2 – NON-INVERTING INPUT 2 IC12: VHiNJM318M/-F (NJM318M) Pin name Signal Address input A0~A12 CE1/CE2 Chip enable...
  • Page 92 FO-1850TH IC13, 105: VHiNJM2902M-1 (NJM2902M) IC2: VHi27C40012MX (27C040) EP-ROM A OUTPUT D OUTPUT (TOP VIEW) A-INPUT D-INPUT – + – Pin name Signal A0~A17 Address input A+INPUT D+INPUT Chip enable Output enable Ground Program B+INPUT C+INPUT DQ1~DQ8 Data output (Program input) –...
  • Page 93 FO-1850TH IC5: VHiMTD1120F-1 (MTD1120F) IC4: VHiR14V24XMVP (R144V24) OUT A PG A RS A IN A DGND3 OUT A IN A SR3IN VS A IRQ2 VDD3 VREF A YCLK C/R A VDD1 XCLK XTLO XTKI RESET GPO0 GPO1 GPO2 IRQ1 DGND2 WRITE DGND1 GPO3...
  • Page 94 FO-1850TH IC7, 15: VHiMB4256A70/ (MB4256A-70) CLOCK CIRCUIT VCC(5V) VSS(0V) A0~A6 LIST DECODER SENSE REFRESH AMP. IN/OUT CONTROL MEMORY SELL (1,048,576 BIT) 22 OE VSS(0V) DATA IN/OUT DATA IN/OUT ENTRY INPUT STROBE INPUT STROBE INPUT ENABLE INPUT ADRESS INPUT ADDRESS INPUT (5V)VCC IC9: VHiHEF4051BT1 (HEF4051) IC1: VHiUPD71051-1 (UPD71051)
  • Page 95 FO-1850TH IC8: VHiLH28F004SU (LH28F004SU) LH28F004SUT-Z1 40 LEAD TSOP 10mm x 20mm TOP VIEW RY/BY# TEL/LIU PWB UNIT IC2: VHiNJM2902D-1 (NJM2902N) IC1: VHiNJM2113D-1 (NJM2113D) A OUTPUT D OUTPUT A-INPUT D-INPUT – + – A+INPUT D+INPUT B+INPUT C+INPUT (TOP VIEW) – + – B-INPUT C-INPUT C OUTPUT...
  • Page 96 FO-1850TH M E M O 8 – 9...

  • Page 97: Parts Guide

    FO-1850TH PARTS GUIDE FO-1850 MODEL CONTENTS Cabinet, etc. Control PWB unit Upper cabinet TEL-Liu PWB unit Document guide upper Power supply PWB unit Optical unit CCD PWB unit Drive unit Joint PWB unit Head unit Multifunction interface PWB unit Paper cassette unit Hardware parts Packing material &...
  • Page 98 FO-1850TH Cabinet, etc. DOCUMENT HEAD UNIT GUIDE UPPER DRIVE UNIT B11 101 89 93 CCD UNIT PAPER CASSETTE UNIT – 1 –...
  • Page 99 FO-1850TH Cabinet, etc. PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 CCNW-4545XH01 Speaker ass’y 2 DCEKP476AXH41 Operation panel unit 3 CSW-M2220SC01 Cover switch ass’y 4 DCEKC384JXHZZ Control PWB unit(Within ROM) 5 DCEKL473AXH04 TEL/Liu PWB unit 6 GCABB2270XHSL Lower cabinet 7 GCOVA2362XHSC Top cover 8 GDAI-2073XHSC...
  • Page 100 FO-1850TH Upper cabinet Document guide upper – 3 –...
  • Page 101 FO-1850TH Upper cabinet PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 DCEKP477AXH02 Operation panel PWB unit 2 GCABA2269XHSF Upper cabinet 3 HPNLH2367XHSD Decoration panel 4 JBTN-2174XHSC 12key 5 JBTN-2175XHSC Direct key 6 JBTN-2176XHSA Start key 7 JBTN-2178XHSA Stop key 8 JBTN-2179XHSA Mode key A 9 JBTN-2180XHSC...
  • Page 102 FO-1850TH Optical unit Drive unit – 5 –...

  • Page 103: Drive Unit

    FO-1850TH Optical unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 DCEKD475AXH03 CCD PWB unit 2 LFRM-2164XHZA Optical frame 3 MSPRP2817XHZZ Lens holding spring 4 PGLSP2058XHZZ Reader glass 5 PLNS-2049XHZZ Lens 6 PMIR-2070XHZZ Mirror 1 7 PMIR-2071XHZZ Mirror 2 8 PMIR-2072XHZZ Mirror 3 9 PSHEZ3196XHZZ...
  • Page 104 FO-1850TH Head unit B15 12 Paper cassette unit Applying Standard 1 2mm – 7 –...
  • Page 105 FO-1850TH Head unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 MLEVP2219XHZZ Lock lever, left 2 MLEVP2220XHZZ Lock lever, right 4 MSPRD2820XHFJ Arm up spring, left 5 MSPRD2821XHFJ Lock lever spring, left 6 MSPRD2822XHFJ Lock lever spring, right 7 MSPRD2823XHFJ PO pinch roller spring 8 MSPRD2829XHFJ Arm up spring, right...
  • Page 106 FO-1850TH Packing material & Accessories AC CORD RECORDING PAPER PAPER CASSETTE UNIT IMAGING FILM UNIT Packing material & Accessories PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 DUNTK4925XHE2 Handset 2 LBSHP2078XHZZ Imaging film frange 4 LPLTP2797XHZB Paper tray 10 NGERH2315XHZZ Imaging film roll gear 16 QCNW-3975XHGY Telephone line cord...
  • Page 107 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 UBATL2033SCZZ Battery(CR2032) [BT1] 2 VCEAGA1HW106M Capacitor(50WV 10µF) [C1] 3 VCEAGA1HW475M Capacitor(50WV 4.7µF) [C2] 4 VCEAGA1HW106M Capacitor(50WV 10µF) [C3] 5 VCEAGA1HW106M Capacitor(50WV 10µF) [C4] 6 VCEAGA1HW106M Capacitor(50WV 10µF) [C5] 7 VCEAGA1HW226M Capacitor(50WV 2.2µF)
  • Page 108 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 81 VCKYTV1EF104Z Capacitor(25WV 0.1µF) [C196] 82 VCKYTV1EF104Z Capacitor(25WV 0.1µF) [C197] 83 VCKYTV1EB104K Capacitor(25WV 0.10µF) [C198] 84 VCCCTV1HH150J Capacitor(50WV 15PF) [C199] 85 VCKYTV1EF104Z Capacitor(25WV 0.10µF) [C200] 86 VCCSTV1HL391J Capacitor(50WV 390PF) [C201] 87 VCKYTV1EF104Z Capacitor(25WV 0.1µF)
  • Page 109 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 162 RCILZ2131SCZZ Coil(Z2131) [L109] 163 VP-1M3R3J0000 Coil(3.3µH) [L110] 164 RCILZ2131SCZZ Coil(Z2131) [L111] 165 RCILZ2131SCZZ Coil(Z2131) [L112] 166 RCORF2098SCZZ Coil [L120] Resistor(1/8W 0Ω ±5%) 167 VRS-TP2BD000J [L121] 168 RCILZ2132SCZZ Coil(Z2132) [L123] Resistor(1/10W 0Ω...
  • Page 110 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK Resistor(1/10W 27KΩ ±5%) 242 VRS-TS2AD273J [R170] Resistor(1/10W 270Ω ±5%) 243 VRS-TS2AD271J [R171] Resistor(1/10W 270Ω ±5%) 244 VRS-TS2AD271J [R172] Resistor(1/10W 270Ω ±5%) 245 VRS-TS2AD271J [R173] Resistor(1/10W 270Ω ±5%) 246 VRS-TS2AD271J [R174] Resistor(1/10W 10KΩ...
  • Page 111 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK Resistor(1/10W 33KΩ ±5%) 322 VRS-TS2AD333J [R258] Resistor(1/10W 20KΩ ±5%) 323 VRS-TS2AD203J [R259] Resistor(1/10W 100KΩ ±5%) 324 VRS-TS2AD104J [R260] Resistor(1/10W 10KΩ ±5%) 325 VRS-TS2AD103J [R261] Resistor(1/10W 10KΩ ±5%) 326 VRS-TS2AD103J [R262] Resistor(1/10W 10KΩ...
  • Page 112 FO-1850TH Control PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK Resistor(1/10W 270Ω ±5%) 403 VRS-TS2AD271J [R358] Resistor(1/10W 0Ω ±5%) 404 VRS-TS2AD000J [R359] Resistor(1/10W 0Ω ±5%) 405 VRS-TS2AD000J [R361] 408 RRLYD3130SCZZ Relay [RY1] 409 VSDTD114EK/-1 Transistor(DTD114EK) [TR100] 410 VSRNC1402//-1 Transistor(RNC1402) [TR101] 411 VSRNC1402//-1...
  • Page 113 FO-1850TH TEL-Liu PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 46 RFILN2024XHZZ Coil(SBT-0260) [L4] 47 RFILN2024XHZZ Coil(SBT-0260) [L5] 48 RFILN2024XHZZ Coil(SBT-0260) [L6] 49 RFILN2024XHZZ Coil(SBT-0260) [L7] 50 QJAKZ2046SCBB Jack [MJ-1/2] 51 QJAKZ2065SC0D Jack [MJTEL] 52 VHPPC814///-1 Photo transistor(PC814) [PC1] 53 VHPTLP521-1BL Photo coupler(TLP521)
  • Page 114 FO-1850TH Power supply PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 0CBUGFZ104GQ/ Capacitor(PA104-C) [C1] 2 0CBUGFZ104GQ/ Capacitor(PA104-C) [C2] 3 0CBUGCM102AT/ Capacitor(DE7090-1B102KVA1-H) [C3] 4 0CBUGCM102AT/ Capacitor(DE7090-1B102KVA1-H) [C4] 5 0CBUGZ1072ZZ/ Capacitor(KMF400VB68M 18×30) [C5] 6 0CBUGCU102BQ/ Capacitor(DE0905-1R102K1K-MHR) [C6] 7 0CBUGCU221BQ/ Capacitor(DE0705-1R221K1K-MHR) [C7] 8 0CBUGFF472AR/...
  • Page 115 FO-1850TH CCD PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK (Unit) 901 DCEKD475AXH03 CCD PWB unit Joint PWB unit PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK 1 QCNCM7014SC0G Connector(7pin) [CNCCD1] 2 QCNCM7014SC0I Connector(9pin) [CNCCD2] 3 QCNCM2442SC0B Conector(21pin) [CNCSW] 4 QCNCM7014SC0B Connector(2pin)
  • Page 116 FO-1850TH I n d e x PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK RANK MARK RANK MSPRC2818XHFJ 1- 26 PSHEZ3239XHZZ 3- 19 CBOX-2011XH05 8- 45 MSPRC2825XHFJ 7- 7 PSHEZ3246XHZZ 1- 99 CCNW-4545XH01 1- 1...
  • Page 117 FO-1850TH PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK RANK MARK RANK RCRSZ2108SCZZ 9- 421 VCEAGA1HW475M 10- 30 VCKYTV1HB102K 9- 21 ″ RDENT2100XHZZ 1- 85 VCKYPU1HB102K 10- 12 9- 22 ″...
  • Page 118 FO-1850TH PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK RANK MARK RANK VHVICPS07//-1 9- 129 VRS-TS2AD103J 9- 256 VRS-TS2AD271J 9- 241 ″ ″ VHVRA391PV6-1 10- 1 9- 257 9- 243 ″...
  • Page 119 FO-1850TH PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK RANK MARK RANK VRS-TS2AD471J 9- 391 0CBUBC0215DK/ 11- 27 ″ ″ 9- 392 11- 28 ″ ″ 9- 393 11- 29 ″...
  • Page 120 FO-1850TH © COPYRIGHT 1997 BY SHARP CORPORATION ALL RIGHTS RESERVED. 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.

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