Sharp FO-475TH Service Manual
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Sharp FO-475TH Service Manual

Sharp FO-475TH Service Manual

Sharp service manual facsimile model ux-258th fo-475th
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[1] Specifications ............................................ 1-1
[2] Operation panel ......................................... 1-2
[3] Transmittable documents .......................... 1-3
[4] Installation ................................................. 1-4
[5] Quick reference guide ............................... 1-7
CHAPTER 2. ADJUSTMENTS
[1] Adjustments ............................................... 2-1
[3] Troubleshooting ...................................... 2-17
[4] Error code table ....................................... 2-18
[1] General description .................................. 3-1
procedures ....................................... 3-3
[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
1 - 1
FACSIMILE
MODEL
[1] Circuit description ..................................... 5-1
power supply PWB ............................5-11
[5] Circuit description of CIS unit ...................5-11
[1] Control PWB circuit ................................... 6-1
[2] TEL/LIU PWB circuit .................................. 6-9
[3] Power supply PWB circuit ...................... 6-11
[4] Operation panel PWB circuit ................... 6-13
[1] Protocol ..................................................... 7-1
[2] Power on sequence ................................... 7-2
[1] Service tools ............................................. 8-1
[2] IC signal name .......................................... 8-4
PARTS GUIDE
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
UX-258TH
FO-475TH
No. 00ZUX258THSME
UX-258
FO-475

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  • Page 1: Table Of Contents

    [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. SHARP CORPORATION SERVICE MANUAL FACSIMILE MODEL CONTENTS CHAPTER 5.
  • Page 2 UX-258TH FO-475TH 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.

  • Page 3: Chapter 1. General Description

    Length 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

    UX-258TH FO-475TH [2] Operation panel PQRS 1. Display This displays messages and prompts during operation and programming. 2. PANEL RELEASE Pull this release toward you to open the operation panel. 3. RECEPTION MODE key Press this key to select the reception mode. An arrow in the display will point to the currently selected reception mode.

  • Page 5: Transmittable Documents

    • Place additional pages carefully and gently in feeder. If force is used, double-feeding or a document jam may result. Readable width Readable length UX-258TH FO-475TH...

  • Page 6: Installation

    This is the telephone jack commonly used in most homes and offices. • Plugging the fax machine into a jack which is not an jack may result in damage to the machine or your telephone system. If you do not know what kind of jack you have, or needed to have one installed, contact the telephone company.
  • Page 7 Rotate the original document support so that it points straight out. 4. Loading the fax paper • Your fax machine prints incoming faxes on a special kind of paper called thermal paper. • The fax’s print head creates text and images by applying heat to the thermal paper.
  • Page 8 UX-258TH FO-475TH 4. Clearing a jammed document If the original document doesn’t feed properly during transmission or copying, or DOCUMENT JAMMED appears in the display, first try press- ing the START/MEMORY key. If the document doesn’t feed out, open the operation panel and remove it.

  • Page 9: Quick Reference Guide

    Answer Page Save Recall Interval Time Save Recall Times Fax Signal Receive Telephone/Fax Remote Number Junk Number Check Remote Reception Polling Select Dial (press numeric keys) START/MEMORY START/MEMORY When finished, replace the handset or press the STOP key. UX-258TH FO-475TH...

  • Page 10: Adjustments

    UX-258TH FO-475TH CHAPTER 2. ADJUSTMENTS [1] Adjustments General Since the following adjustments and settings are provided for this model, make adjustments and/or setup as necessary. 1. Adjustments Adjustments of output voltage (FACTORY ONLY) 1. Install the power supply unit in the machine.

  • Page 11: Diagnostics And Service Soft Switch

    START Flash memory clear START Flash memory check START Entry data receive Entry data send START START Auto feeder mode All black mode START Shading mode START clock indication may "ESPERE POR FAVOR" MEMORY CLEAR? appears. " " Function UX-258TH FO-475TH...
  • Page 12 UX-258TH FO-475TH 3. Diagnostic items description 3. 1. Soft switch mode Used to change the soft switch settings. The soft switch which is stored internally is set by using the keys. The available soft switches are SW-A1 to SW-L2. The content of soft switches is shown in page 2-5 to 2-16.
  • Page 13 SW Nos. remain in effect. When the COPY key is pressed, the contents of soft switches are printed. The soft switch mode is terminated. 2 – 4 START key. key. START key during setting. UX-258TH FO-475TH...
  • Page 14 UX-258TH FO-475TH 5. Soft switch description • Soft switch DATA ITEM Protect from echo Forced 4800 BPS reception Footer print Length limitation of copy/send/receive CSI transmission DIS receive acknowledgement during G3 transmission Non-modulated carrier for V29 transmission modem EOL detect timer Modem speed Sender’s information transmit...
  • Page 15 Disconnect the line when DIS is received in RX mode Equalizer freeze control (MODEM) Equalizer freeze control 7200 BPS only CNG transmission in manual TX mode Initial compression scheme for sharp fax in TX mode Reserved Recall interval Recall times...
  • Page 16 UX-258TH FO-475TH DATA ITEM DTMF signal transmission level (High) Reserved Reserved Reserved Reading slice (Binary) Reading slice (Half tone) Line density selection Reserved MTF correction in half tone mode Reserved Number of rings for auto receive Automatic switching manual to auto receive...
  • Page 17 ) detect Yes Compatible Not compatible Binary input No. = 1 (5 1pulse 2pulses No. 2 No. 3 1pulse 2pulses No. 4 No. 5 2 – 8 Initial Remarks setting 100ms 120ms OPTION OPTION OPTION 3pulses 4pulses 3pulses 4pulses UX-258TH FO-475TH...
  • Page 18 UX-258TH FO-475TH DATA ITEM Busy tone detection ON/OFF time (Lower duration) Busy tone detection ON/OFF time (Upper duration) Reserved Busy tone continuous sound detect time Busy tone detect continuation sound detect during OGM Busy tone detect continuation sound detect during ICM...
  • Page 19 800 Hz ~ 1400 Hz 800 Hz ~ 1200 Hz 100ms 200ms 300ms No. 7 No. 8 Cannot change Change allowed Middle No. 7 No. 8 2 – 10 UX-258TH FO-475TH Initial Remarks setting OPTION Fast Fast OPTION 400ms High OPTION...
  • Page 20 UX-258TH FO-475TH DATA ITEM Reserved Reserved Polling key Reserved Reserved Speaker volume (5 stages) Reserved Reserved Communication results printout (Transaction report) Reserved Reserved Reserved Reserved Entering DIAG mode by pressing SPEED Reserved Reserved Reserved Reserved Reserved Reserved Reserved OGM / ICM output level...
  • Page 21 When use the Anti junk fax function, set to "1". SW-A6 No. 1 Auto gain control (MODEM) When this mode is enabled, if the reception signal level is under 31dBm. The modem itself controls the signal gain automatically. 2 – 12 UX-258TH FO-475TH...
  • Page 22 SW-A6 No. 7 Initial compression scheme for sharp fax in TX mode When set to "0", if the other fax is Sharp model, fax transmit the docu- ment by H2 mode. When set to "1", even if the other fax is Sharp model, fax transmit the document by MR mode.
  • Page 23 ) for remote reception with a GE manufac- " is not changed. (Default: 5 SW-H1 No. 2 Detection range 150msec ~ 900msec 150msec ~ 650msec 350msec ~ 900msec 350msec ~ 650msec UX-258TH FO-475TH ) detect ). When set to "1",...
  • Page 24 UX-258TH FO-475TH SW-H1 No. 3 Reserved Set to "0". SW-H1 No. 4 Busy tone continuous sound detect time Set detecting time busy tone continuous sound for 5 seconds or 10 sec- onds. SW-H1 No. 5 Busy tone detect continuation sound detect during Used to detect the continuous tone of specific frequency during OGM output.
  • Page 25 Energy reference reference Used to control OGM and ICM output level. threshold threshold (...+25dB) SW-L1 No. 6 ~ No. 8 Reserved Set to "0". Input(dB) SW-L2 No. 1 ~ No. 8 Reserved Set to "0". 2 – 16 UX-258TH FO-475TH...

  • Page 26: Troubleshooting

    UX-258TH FO-475TH [3] Troubleshooting Refer to the following actions to troubleshoot any of problems mentioned in 1-4. [1] A communication error occurs. [2] Image distortion produced. [3] Unable to do overseas communication. [4] Communication speed slow due to FALLBACK. •...

  • Page 27: Error Code Table

    Error occurred after or during inquiry from the remote (transmitting) machine as to whether reception is possible or not. Error occurred during or just after fallback. Error occurred after the retransmission end command was received. 2 – 18 UX-258TH FO-475TH...

  • Page 28: Chapter 3. Mechanism Blocks

    UX-258TH FO-475TH CHAPTER 3. MECHANISM BLOCKS [1] General description 1. Document feed block and diagram Separator rubber Rear roller A/B Transfer roller Pinch roller Fig. 1 2. Document feed operation 1) The document placed in the hopper actuates the document sensor.
  • Page 29 5) Replace the thermal head with a new one and check to see if the same trouble occurs. 3 – 2 UX-258TH FO-475TH Recording paper Paper support Platen roller Recording paper...

  • Page 30: Disassembly And Assembly Procedures

    UX-258TH FO-475TH [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 31 3 – 4 Part name Q’ty Part name Screw (4 6) AC cord ass’y Screw (3 6) TEL ARG cable Power supply PWB unit TEL/LIU PWB unit Rubber leg PWB case, bottom AC cord earth cable 45˚ UX-258TH FO-475TH Q’ty...
  • Page 32 UX-258TH FO-475TH Operation panel unit and scanner frame Parts list (Fig. 3) Part name Mechanism unit Screw (3 10) Scanner frame unit Document guide lower Reduction gear, 17/36Z Reduction gear, 17/21Z Idler gear, 25Z Feed roller shaft Hook Hook Fig. 3 3 –...
  • Page 33 Head cable Head spring A Head spring B Screw (3 6) View:A View:B Fig. 4 3 – 6 UX-258TH FO-475TH Q’ty Part name Head support, right Screw (3 6) Head earth cable Head support, left Thermal head Pinch roller shaft...
  • Page 34 UX-258TH FO-475TH Document guide upper Parts list (Fig. 5) Fig. 5 3 – 7 Part name Q’ty Part name Rear sheet Panel lock lever CIS gear, 29Z Document sensor lever CIS roller A ass’y spring Transfer bearing Document sensor lever Separate spring CIS roller B ass’y...
  • Page 35 GAP 0 HOPPER GUIDE (L) LCD PWB LCD cable Fig. 6 3 – 8 Part name Q’ty Part name Hopper guide, right Hopper guide, left TAD key Stop key Start key Direct key 12 key Operation panel UX-258TH FO-475TH Q’ty...
  • Page 36 UX-258TH FO-475TH Drive unit, PWB and cutter Parts list (Fig. 7) Mechanism unit Screw (3 10) Cutter arm Drive unit Platen gear Platen roller Platen bearing Screw (3 10) Fig. 7 3 – 9 Part name Q’ty Part name Cutter unit...
  • Page 37 Speaker and paper sensor lever Parts list (Fig. 8) Mechanism unit Paper sensor lever spring Paper sensor lever Screw Speaker Fig. 8 3 – 10 UX-258TH FO-475TH Part name Q’ty...
  • Page 38 UX-258TH FO-475TH Drive frame Lock the MOTOR by this rib SECTION : A-A Hook be doing lock NOTE) Apply certanly to a part of a nail at the time of GREASE application GEAR attachment boss Parts list (Fig. 9) Part name Q’ty...
  • Page 39 Binding the core with lower cabinet Head cable and head earth cable pass to the core 2times All the cables must wiring to the motor heat sink The panel cable mustwiring to under core cable CIS unit 0~2mm 19mm Panel cable UX-258TH FO-475TH Q’ty...

  • Page 40: Chapter 4. Diagrams

    UX-258TH FO-475TH CHAPTER 4. DIAGRAMS 4 – 1...
  • Page 41 UX-258TH FO-475TH 4 – 2...
  • Page 42 UX-258TH FO-475TH 4 – 3...

  • Page 43: Chapter 5. Circuit Description

    UX-258TH FO-475TH CHAPTER 5. CIRCUIT DESCRIPTION [1] Circuit description 1. General description The compact design of the control PWB is obtained by using ROCK- WELL fax engine in the main control section and high density printing of surface mounting parts. Each PWB is independent according to its func- tion as shown in Fig.

  • Page 44: Circuit Description Of Control Pwb

    4 STROBE TPH DECOMPRESSION LATCHLESS TPH EXTEMAL DMA I/F DMA BUS OPIF OUTPUTS LEDCTL/GPO[16] LCDCS/GPO[17] OPO[0]/GPO[8] OPO[1]/GPO[9] OPO[2]/GPO[10] OPO[3]/GPO[11] OPO[4]/GPO[12]/SSTXD1 OPO[5]/GPO[13] OPO[6]/GPO[14] OPO[7]/GPO[15] UX-258TH FO-475TH WRPROTN SYSCLK TSTCLK DEBUGN RESETN XOUT PWRDWNN BATRSTN "OPIF OUTPUTS" BELOW "OPIF INPUTS" BELOW THADIN PCLK...
  • Page 45 UX-258TH FO-475TH FC200 (IC2) Terminal descriptions Pin Name Pin No. MIRQn SYSCLK TSTCLK A[23:0] [1:6][8:13] [15:20][22:27] D[7:0] [136:139] [141:144] ROMCSn CS1n CS0n MCSn SYNC REGDMA WAITn RASn CAS[1:0]n [111:112] DWRn DEBUGn RESETn TEST XOUT PWRDWNn BATRSTn WRPROTn START CLK1 CLK1n...
  • Page 46 A/D Analog Power VADG A/D Digital Ground Positive Reference Voltage for Video A/D. Analog Video A/D input. Analog Thermal A/D input. Power and Ground Digital Ground Digital Power Battery Power DRAM Battery Power 5 – 4 UX-258TH FO-475TH Pin Description...
  • Page 47 UX-258TH FO-475TH (2) Panel control block The following controls are performed by the FC200. • Operation panel key scanning • Operation panel LCD display (3) Mechanism/recording control block • Recording control block diagram (1) OPO[7:0]* OPERATOR OPI[3:0]* PANEL, PANEL/LCD PWB...
  • Page 48 – High fidelity recording and playback of audio signals – 32 kbps and 24 kbps – Programmable AGC – DTMF detect, tone detect, and tone transmit – Near-end echo cancellation • 8-bit or 16-bit high quality audio mode transmission/reception 5 – 6 UX-258TH FO-475TH...
  • Page 49 UX-258TH FO-475TH R96V24 (IC1) Hardware Interface Signals Pin Signals – 100-Pin PQFP Pin No. Signal Name VDD1 WRITE DGND1 RXOUT RMODE TSTROBE TRESET DGNDA1 TMODE TXDAT AVDD TALK AGND1 TXA1 TXA2 DGNDA2 VAA1 SLEEP AGND2 VREF DGNDA3 SPKR VAA2 CLKIN...

  • Page 50: Circuit Description Of Tel/Liu Pwb

    The ringer sound is formed in the tone of 1-chip engine when CI signal is detected. The amplifier circuit drives the speaker of the main body. 5 – 8 TXCONT SIGTX MODEM 4053 (R96V24) SIGRX BZCONT TXCONT RXCONT MONITOR GAIN-C BZCONT FC200 RCVOL SP MUTE TEL MUTE UX-258TH FO-475TH...
  • Page 51 UX-258TH FO-475TH 5. Externally connected TEL OFF HOOK detection circuit section • The circuit current detection is turned on together with OFF HOOK of main body or OFF HOOK of externally connected TEL. ON of CML OFF is judged as OFF HOOK of externally connected TEL.
  • Page 52 TEL MUTE Fig. 6 5 – 10 Signal Name (CNLIU) Signal Name (CNLIU) TELOUT TELIN TELMUTE GAIN-C TXCONT SIGTX 4053 (R96V24) SIGRX BZCONT TXCONT RXCONT MONITOR BZCONT RCVOL SP MUTE TEL MUTE UX-258TH FO-475TH RXIN TXOUT +24VA MODEM GAIN-C FC200...

  • Page 53: Circuit Description Of Power Supply Pwb

    UX-258TH FO-475TH [4] Circuit description of power supply PWB 1. Block diagram T1.25A/250V AC IN T1.25A/250V 2-1. Noise filter circuit The input noise filter section is composed of L and C, which reduces normal mode noise from the AC line and common mode noise to the AC line.

  • Page 54: Chapter 6. Circuit Schematics And Parts Layout

    RESET DEBUG R108 TEST 7,134 95,108 64,88 53,56 ADXG ADGA ADGD ADVA C217 100P C202 6 – 1 UX-258TH FO-475TH BATRST VBAT C131 2200P RESET (4-1D) PWRDWN C153 22P XOUT 32.768kHz C154 22P +VREF +VREF (5-4D) –VREF (5-4D) –VREF/CLREF (5-5D)
  • Page 55 UX-258TH FO-475TH 6 – 2...
  • Page 56 SLEEP GP00 GP01 R103 270 GP02 GP03 R109 270 GP04 R144 270 GP05 R145 270 GP06 R111 270 GP07 6 – 3 UX-258TH FO-475TH N.M. C221 C220 C203 N.M. R104 MPXC CNLIUB-5 MPXA CNLIUB-3 R256 LEDON (5-5F) R112 E-RELAY CNLIUB-6...
  • Page 57 UX-258TH FO-475TH 6 – 4...
  • Page 58 UX-258TH FO-475TH 6 – 5...
  • Page 59 UX-258TH FO-475TH 6 – 6...
  • Page 60 UX-258TH FO-475TH Control PWB parts layout (Top side) 6 – 7...
  • Page 61 UX-258TH FO-475TH Control PWB parts layout (Bottom side) 6 – 8...
  • Page 62 UX-258TH FO-475TH 6 – 9...
  • Page 63 UX-258TH FO-475TH TEL/LIU PWB parts layout 6 – 10...
  • Page 64 RD6.2ESAB2 RD30FB3 RD3.3ESAB2 1000P 1000P 1000P 6 – 11 UX-258TH FO-475TH...
  • Page 65 UX-258TH FO-475TH Power supply PWB parts layout 6 – 12...
  • Page 66 R5 100K R10 100K R9 100K R3 100K R2 100K R4 100K R11 100K R12 100K R6 100K 6 – 13 UX-258TH FO-475TH...

  • Page 67: Chapter 7. Operation Flowchart

    UX-258TH FO-475TH CHAPTER 7. OPERATION FLOWCHART [1] Protocol Receive side G3 communication To recording position (DCS) Cut line printed Cut line printed Transmitter side (Document inserted into document sensor during standby) Recording papor ejected 7 – 1 Document inserted to...

  • Page 68: Power On Sequence

    STOP key ? 3 sec ? STAND-BY START CPU initialized MODEM initialized “WAIT A MOMENT” display STOP key ? 3 sec ? STAND-BY “MEMORY CLEARED” display Memory clear STAND-BY 7 – 2 UX-258TH FO-475TH “MEMORY CLEARED” display Memory clear PROCESS CHECK MODE...

  • Page 69: Chapter 8. Others

    UX-258TH FO-475TH CHAPTER 8. OTHERS [1] Service tools 1. List PARTS CODE C P W B S 2 9 1 5 S C S 1 Relay board unit P S H E Z 3 3 5 4 S C Z Z...
  • Page 70 These cables are connected from the extension board and the checked control PWB at TP1 thru TP3 (signals of DG, +5V and PSNS). 8 – 2 UX-258TH FO-475TH Mechanical unit PWB to be tested Actual operation with mechanical unit ON/OFF operation OFF (Photo interrupter is interrupted.)
  • Page 71 UX-258TH FO-475TH 3. Shading paper The white and black basis is applied to remember the shading wave- form. Be sure to perform this operation when replacing the battery or replacing the control PWB. Execute in the shading mode of DIAG mode.

  • Page 72: Ic Signal Name

    8 – 4 (TOP VIEW) Pin name A0~A12 CE1/CE2 I/O1~I/O8 15 DQ4 N.C. Inhibit VDD: Pin 16 VSS: Pin 8 VEE: Pin7 UX-258TH FO-475TH Signal Address input Chip enable Write enable Write enable Data I/O Power source Ground No connection Common Out/In...
  • Page 73 UX-258TH FO-475TH IC11, 12: VHiLM2902D/-1 (LM2902D) A OUTPUT A-INPUT + – – A+INPUT B+INPUT – + – B-INPUT B OUTPUT IC5: VHiHEF4051BT1 (HEF4051BT) Inhibit Controls Switches In/Out VDD: Pin 16 VSS: Pin 8 VEE: Pin7 IC100: VHiPST596CMT1 (PST596CNR) (TOP VIEW)
  • Page 74 IC1: VHiR96FC20V24 (R96V24) VDD1 WRITE DGND1 RXCONT RMODE TSTROBE TRESET DGNDA1 TMODE TXDAT AVDD TALK AGND1 TXA1 TXA2 DGNDA2 8 – 6 UX-258TH FO-475TH DGND3 SR3IN IRQ2 VDD3 YCLK XCLK XTLO XTKI RESET GPO0 GPO1 GPO2 IRQ1 DGND2 GPO3 GPO4 GPO5 GPO6...
  • Page 75 UX-258TH FO-475TH IC2: VHiR96FC20V24 (FC200) VSSO VDDO VSSO VSSI PCLK POAT PLAT VDDI STRB3 STRB2 STRB1 STRB0 TEL/LIU PWB UNIT IC1: VHiNJM2904D-1 (NJM2904D) OUTPUT 1 INVERTING INPUT 1 NON-INVERTING INPUT 1 – 8 – 7 OUTPUT 2 INVERTING INPUT 2 –...

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