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Sharp UX-A255U Service Manual
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Sharp UX-A255U Service Manual

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Chapters 1, 2, 3, 7 and 8 of this manual are omitted because they are partly common to the UX-P100U.
Please refer to previous service manual (00ZUXP100USME) for these chapters.
[1] Specifications ............................................ 1-1
[2] Operation panel ......................................... 1-2
[3] Refer to the service manual of UX-P100U.
[4] Refer to the service manual of UX-P100U.
[5] Quick setup guide ..................................... 1-3
[6] Quick reference guide ............................... 1-4
(UX-5CR) ............................................1-4
[1] Adjustments ............................................... 2-1
[3] Refer to the service manual of UX-P100U.
[4] Refer to the service manual of UX-P100U.
CHAPTER 3. MECHANISM BLOCKS
[1] Refer to the service manual of UX-P100U.
[2] Refer to the service manual of UX-P100U.
[1] Block diagram ............................................4-1
[2] Wiring diagram .......................................... 4-2
[3] Point-to-point diagram ............................... 4-3
Parts marked with "
" are 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
No. 00ZUXA255USME
FACSIMILE
MODEL
SELECTION CODE
UX-A255U
[1] Circuit description ...................................... 5-1
power supply PWB ............................ 5-13
[5] Circuit description of CIS unit ...................5-13
[1] Control PWB circuit ................................... 6-1
[2] TEL/LIU PWB circuit ................................. 6-9
[3] Power supply PWB circuit ...................... 6-14
[4] Operation panel PWB circuit ................... 6-16
[5] Interface PWB circuit ............................... 6-18
CHAPTER 7. OPERATION FLOWCHART
[1] Refer to the service manual of UX-P100U.
[2] Refer to the service manual of UX-P100U.
CHAPTER 8. OTHERS
[1] Refer to the service manual of UX-P100U.
[2] Refer to the service manual of UX-P100U.
[3] Refer to the service manual of UX-P100U.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
UX-A255U
UX-A255
DESTINATION
U.S.A.

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  • Page 1: Table Of Contents

    UX-A255U SERVICE MANUAL No. 00ZUXA255USME FACSIMILE UX-A255 MODEL SELECTION CODE DESTINATION UX-A255U U.S.A. Chapters 1, 2, 3, 7 and 8 of this manual are omitted because they are partly common to the UX-P100U. Please refer to previous service manual (00ZUXP100USME) for these chapters.
  • Page 2 UX-A255U 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

    Copy Bond As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for product 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-A255U [2] Operation panel REC/ PLAY MEMO PQRS WXYZ REDIAL RESOLUTION/ RECEPTION MODE STOP COPY/HELP START/MEMORY OpenLCR FUNCTION SPEAKER DELETE REPEAT SKIP 14 15 16 17 1. Display 10. RESOLUTION / RECEPTION MODE key This displays messages and prompts to help you operate the When a document is in the feeder, press this key to adjust machine.

  • Page 5: Quick Setup Guide

    UX-A255U [5] Quick setup guide Note: To enter your name and fax number and set the date and time so that they appear at the top of each fax you send, see pages 16 - 19 of your operation manual.

  • Page 6: Quick Reference Guide

    UX-A255U [6] Quick reference guide [7] Option imaging film specifications (UX-5CR) SENDING FAXES Place your document (up to 10 pages) face down in the document feeder. 1. Structure This article is composed of polyester film coated with heat-resistant layer, matt layer and hot melt ink layer, leader film and paper core. Ink film specification is "DNP standard ink film HC".

  • Page 7: Chapter 2. Adjustments

    UX-A255U CHAPTER 2. ADJUSTMENTS 3. Settings (1) Dial mode selector [1] Adjustments DIAL mode (Soft Switch No. SW-B4 DATA No. 3) (step 1) Select "OPTION SETTING". General KEY : FUNCTION Since the following adjustments and settings are provided for this model,...

  • Page 8: Diagnostics And Service Soft Switch

    UX-A255U [2] Diagnostics and service soft switch 1. Operating procedure (1) Entering the diagnostic mode Press FUNC 7 , and the following display will appear. ROM Ver. TA18 After 2 sec: DIAG MODE TA18 Then press the START key. Select the desired item with the key or the # key or select with the rapid key.

  • Page 9: Memory Clear

    UX-A255U 3. Diagnostic items description 3. 6. Signal send mode 3. 1. Soft switch mode This mode is used to send various signals to the circuit during FAX com- munication. Every push of START key sends a signal in the following Used to change the soft switch settings.

  • Page 10: Press Func

    UX-A255U 3. 12. Entry data receive 3. 13. Flash memory check In this mode, the registered data sent from the other machine is receiv- Data is written into and read from the flash memory to check data con- ed and the received data is registered in the machine. When this mode formity.
  • Page 11 UX-A255U 5. Soft switch description • Soft switch Switch setting and function Initial DATA ITEM Remarks setting Protect from echo Forced 4800 BPS reception Footer print Length limitation of copy/send/receive No limit Copy/send: 60cm Receive: 1m CSI transmission No transmitted...
  • Page 12 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting Reserved End Buzzer 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 Reserved...
  • Page 13 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting DTMF signal transmission level (High) Binary input No. = 16 8 4 2 1 1 2 3 4 5 0 0 1 0 1 Dial tone detection (LCR center call)
  • Page 14 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved DTMF detection time 50ms 80ms 100ms 120ms No.
  • Page 15 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Busy tone detection ON/OFF time (Lower 150ms 200ms 250ms 350ms duration) No. 1 No. 2...
  • Page 16 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting A.M. quiet detect time Binary input No. = 16 8 4 2 1 1 2 3 4 5 0 0 1 1 0 Reserved Reserved Reserved Reserved Max OGM record time...

  • Page 17: Reserved

    UX-A255U Switch setting and function Initial DATA ITEM Remarks setting Reserved Reserved Sender’s phone number setting Cannot change Change allowed Reserved Reserved Summer time setting OPTION Ringer volume Middle High OPTION No. 7 No. 8 Reserved Reserved Reserved Handset receiver volume...
  • Page 18 UX-A255U Switch setting and function Initial DATA ITEM Remarks setting Paper set size LETTER LEGAL OPTION No. 1 No. 2 Automatic reduce of receive Auto 100 % OPTION Print contrast Normal Lighter Light Dark Darker OPTION No. 4 No. 5 No.
  • Page 19 UX-A255U • Soft switch function description SW-A2 No. 8 CNG transmission When set to "0" , this model allows CNG transmission by pressing the SW-A1 No. 1 Protect from echo Start key in the key pad dialing mode. When set to "1", CNG transmis- sion in the key pad dialing mode cannot be performed.
  • Page 20 UX-A255U SW-A5 No. 5, No. 6 Digital cable equalizer setting SW-B2 No. 7, No. 8 Reserved (Reception for Caller ID) Set to "0". Line equalization when reception for CALLER ID is to be set according SW-B3 No. 1 ~ No. 5 Reserved to the line characteristics.
  • Page 21 UX-A255U SW-B6 No. 6 Dial tone detection (LCR center call) <Example of use> Used to set YES/NO of dial tone detection (calling LCR center). Phone Number Intended Ring Pattern Purpose SW-B6 No. 7, No. 8 Reserved Ring Pattern 555-1234 Voice Calls Standard Set to "0".
  • Page 22 UX-A255U SW-D2 No. 4 Reserved SW-F1 No. 5 ~ No. 8 Remote operation code figure by external TEL (0 ~ 9) Set to "0". Remote operation codes can be changed from 0 through 9. If set to SW-D2 No. 5 Caller ID function greater than 9, it defaults to 9.
  • Page 23 UX-A255U SW-H1 No. 5 Busy tone detect continuation sound detect during SW-I3 No. 3 Two way record function If this switch is set to "1", the machine disables two way recording. Used to detect the continuous tone of specific frequency during OGM SW-I3 No.
  • Page 24 UX-A255U SW-I7 No. 3, No. 4 AGC slew rate (Mic) SW-L1 No. 8 Reserved The AGC Slew Rate controls the convergence of the message playback Set to "0". level to the desired playback level. A large slew rate will allow faster SW-L2 No.

  • Page 25: Chapter 4. Diagrams [1] Block Diagram

    UX-A255U CHAPTER 4. DIAGRAMS [1] Block diagram 4 – 1...

  • Page 26: Wiring Diagram

    UX-A255U [2] Wiring diagram 4 – 2...

  • Page 27: Point-To-Point Diagram

    UX-A255U [3] Point-to-point diagram CNMT TPBD- TPBD- CNLIUA CNLIUA TPAD- TPAD- RHS- RHS- TPBD TPBD TX/RX TPAD TPAD MOTOR +24VL +24VL MICMUTE MICMUTE TELIN TELIN TEL/LIU TELMUTE TELMUTE RXIN RXIN TXOUT TXOUT CNTH STRB1- STRB1- FILM FILM STRB2- STRB2- RANK...

  • Page 28: Chapter 5. Circuit Description

    UX-A255U CHAPTER 5. CIRCUIT DESCRIPTION 3. Operational description Operational descriptions are given below: • [1] Circuit description Transmission operation When a document is loaded in stand-by mode, the state of the docu- ment sensor is sensed via the 1 chip fax engine (SCE214V). With 1.

  • Page 29: Circuit Description Of Control Pwb

    UX-A255U 4) External RAM and ROM [2] Circuit description of control PWB Moveable and programmble size external SRAM memory of up to 1 MB, DRAM memory of up to 4 MB, and ROM of up to 2 MB can be directly 1.
  • Page 30 UX-A255U 12) Video Processing 20) Power Up/Down Control The CX06835 supports two modes of shading correction for scanner Power Up/Down detection is provided internally. The threshold voltages data non-uniformity arising from uneven sensor output or uneven illumi- are: nation. Corrections are provided on either an 8-pixel group or are ap- •...
  • Page 31 Fixed and programmable digital compromise equalization 2.9 kbps which provides 24 minutes of stored voice messages in 4 Mbits of memory. But for UX-A255U, a part of memory is used for other usages. DTMF detect and tone detect So the total recording time is shortened at about 20 minutes. This voice ITU-T V.21 Channel 2 FSK 7E Flag Detect...
  • Page 32 UX-A255U Integrated Analog Control Resisters for 20438 The 20438 IA can be used as a Primary Integrated Analog (PIA) codec or as a Secondary Integrated Analog (SIA) codec, depending on the signal connection with the SCE Controller ASIC device. In the SCE100 product, both the PIA and the SIA are packaged external to the SCE Controller device, whereas in the SCE214V, the PIA is packaged with the SCE214V Controller and the SIA is external.
  • Page 33 UX-A255U SCE214V (IC3) Terminal descriptions Input Output Pin List Pin Description Type Type VDDPLL — — — PLL Power VSSPLL — — — PLL GND ROMCSn — 13Xs — SYNC/GPO[20] — 13Xs — — 13Xs — — 13Xs — DEBUGn —...
  • Page 34 UX-A255U SCE214V (IC3) Terminal descriptions Input Output Pin List Pin Description Type Type — — — Digital Power GPIO[11]/BE/SERINP/SR4IN 13Xs — GPIO[19]/RDY/SEROUT 13Xs — START — — CLK1n/GPO[25] — 13Xs — CLK2/GPO[24] — 13Xs — — — — IA GND MCLK —...
  • Page 35 UX-A255U SCE214V (IC3) Terminal descriptions Input Output Pin List Pin Description Type Type A[12] 13Xs CPU Address Bus A[13] 13Xs CPU Address Bus A[14] 13Xs CPU Address Bus A[15] 13Xs CPU Address Bus A[16] 13Xs CPU Address Bus — —...
  • Page 36 UX-A255U (3) Panel control block The following controls are performed by the SCE214V. • Operation panel key scanning • Operation panel LCD display (4) Mechanism/recording control block • Recording control block diagram (1) TEST[1:0] BATRSTN RESETN TONE ALTTONE TSTCLK REGDMA...

  • Page 37: Circuit Description Of Tel/Liu Pwb

    UX-A255U [3] Circuit description of TEL/LIU PWB (1) TEL/LIU block operational description 1) Block diagram TEL/LIU PWB CONTROL PWB RTLOOP MODEM BLOCK (20438 I/A) IC102-B 0,6dB SIGTX SPKRP LINE TXOUT MIC ENABLE SP OUT ENABLE CI DETECTOR SIGRX MICP RXIN...
  • Page 38 UX-A255U 5. CI detection circuit • CI is detected by the photo coupler which is integrated in series in the primary side TEL circuit well proven in the existing unit. 6. Signal/DTMF transmission level & receiving level • Signal transmission level setting: ATT -8 dB Circuit output: -11 dBm.
  • Page 39 UX-A255U [Signals for status recognition according to input signals] Signal Name Function Signal Name (CNLIUA) Signal Name (CNLIUA) H:The handset is in the on-hook state. RHS- TXOUT L: The handset is in the off-hook state. +24VL Incoming call (CI) detection signal...

  • Page 40: Circuit Description Of Power Supply Pwb

    UX-A255U [4] Circuit description of power supply PWB 1. Block diagram 2.5A/125V Noise Rectifying +24V Filter AC IN Smoothing FUSE Switching Circuit Circuit 4A/32V Circuit VREG (+5V) Control Circuit Photo Coupler Fig. 7 2-1. Noise filter circuit 2-4. Control circuit...

  • Page 41: Chapter 6. Circuit Schematics And Parts Layout

    UX-A255U CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT 6 – 1...
  • Page 42 UX-A255U 6 – 2...
  • Page 43 UX-A255U 6 – 3...
  • Page 44 UX-A255U 6 – 4...
  • Page 45 UX-A255U 6 – 5...
  • Page 46 UX-A255U 6 – 6...
  • Page 47 UX-A255U Control PWB parts layout (Top side) 6 – 7...
  • Page 48 UX-A255U Control PWB parts layout (Bottom side) 6 – 8...
  • Page 49 UX-A255U 6 – 9...
  • Page 50 UX-A255U 6 – 10...
  • Page 51 UX-A255U 6 – 11...
  • Page 52 UX-A255U TEL/LIU PWB parts layout (Top side) 6 – 12...
  • Page 53 UX-A255U TEL/LIU PWB parts layout (Bottom side) 6 – 13...
  • Page 54 UX-A255U 6 – 14...
  • Page 55 UX-A255U Power supply PWB parts layout (Top side) Power supply PWB parts layout (Bottom side) 6 – 15...
  • Page 56 UX-A255U 6 – 16...
  • Page 57 UX-A255U Operation panel PWB parts layout Operation panel PWB parts layout (Top side) (Bottom side) Note: Since the parts of PWB cannot be supplied, change it as a unit. 6 – 17...
  • Page 58 UX-A255U 6 – 18...

  • Page 59: Parts Guide

    UX-A255U PARTS GUIDE UX-A255 MODEL SELECTION CODE DESTINATION UX-A255U U.S.A. CONTENTS Cabinet, etc. Control PWB unit Top cover/Sub frame TEL/LIU PWB unit Upper cabinet/Document guide upper Power supply PWB unit Drive unit Operation panel PWB unit Packing material & Accessories...

  • Page 60: Cabinet,Etc

    UX-A255U [1] Cabinet,etc. OPERATION PANEL UNIT DOCUMENT GUIDE UPPER TOP COVER/ SUB FRAME DRIVE UNIT – 1 –...
  • Page 61 UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [1] Cabinet,etc. CCNWN484AXH01 Speaker ass’y CLEVP2358XH01 Hook switch lever ass’y CROLR2481XH01 PO roller ass’y DCEKC282RXHZZ Control PWB unit(Within ROM) DCEKL364CXH01 TEL/LIU PWB unit DCEKP337CXH01 Interface PWB unit QCNWN487AXHZZ Panel cable LBNDJ2006XHZZ...
  • Page 62 UX-A255U [2] Top cover/Sub frame PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [2] Top cover/Sub frame GCOVA2448XHSA Top cover MSPRC3301XHZZ Hopper spring NGERP2318XHZZ Pinion gear PGIDM2619XHSA Hopper guide,left PGIDM2620XHSA Hopper guide,right LFRM-2227XHZZ Sub frame LFRM-2232XHZZ Sub frame plate MLEVP2363XHZZ...
  • Page 63 UX-A255U [3] Upper cabinet/Document guide upper PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [3] Upper cabinet/Document guide upper GCASP2145XHSB Panel case JBTN-2339XHSA 12 key JBTN-2340XHSA Start key JBTN-2341XHSA Function key DCEKP336CXH04 Operation panel PWB unit QSW-K0005AWZZ Tact switch [SW]...
  • Page 64 UX-A255U [4] Drive unit 10 2 PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [4] Drive unit CGERH2314XH04 Slip gear ass’y CLEVP2359XH01 Planet gear lever ass’y A CLEVP2360XH01 Planet gear lever ass’y B CLEVP2361XH01 Planet gear lever ass’y C CLEVP2362XH01 Planet gear lever ass’y D...

  • Page 65: Packing Material & Accessories

    UX-A255U [5] Packing material & Accessories TAPE TAPE TAPE AC CORD PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [5] Packing material & Accessories DUNTK468BXHFW Handset QCNWG209BXHOW Handset cord LPLTP3184XHZZ Paper tray extension NGERH2568XHZZ Imaging film gear PRBNN2033SC10 Imaging film(Initial starter film 10m)

  • Page 66: Control Pwb Unit

    UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [6] Control PWB unit UBATL2049SCZZ Battery(CR2032T23) [BAT1] VCEAGA0JW227M Capacitor(6.3WV 220 F) [C1] VCEAGA1EW476M Capacitor(25WV 47 F) [C2] VCEAGA1HW106M Capacitor(50WV 10 F) [C3] VCEAGA1HW106M Capacitor(50WV 10 F) [C4] VCEAGA1HW106M Capacitor(50WV 10 F)
  • Page 67 UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [6] Control PWB unit VCKYCY1HB102K Capacitor(50WV 1000PF) [C200] VCKYCY1HB102K Capacitor(50WV 1000PF) [C207] VCKYCY1AB105K Capacitor(10WV 1.0 F) [C208] VCKYCY1HB471K Capacitor(50WV 470PF) [C211] VCKYCY1HF104Z Capacitor(50WV 0.1 F) [C212] QCNCM7014SC0G Connector(7pin) [CNCIS] QCNCM7014SC0B Connector(2pin)

  • Page 68: Tel/Liu Pwb Unit

    UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [6] Control PWB unit VRS-CY1JB203J Resistor(1/16W 20K [R152] VRS-CY1JB102J Resistor(1/16W 1K [R153] VRS-CY1JB222J Resistor(1/16W 2.2K [R154] VRS-CY1JB271J Resistor(1/16W 270 [R155] VRS-CY1JB103J Resistor(1/16W 10K [R156] VRS-CY1JB106J Resistor(1/16W 10M [R157] VCKYCY1HF104Z Capacitor(50WV 0.1 F)

  • Page 69: Power Supply Pwb Unit

    UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [7] TEL/LIU PWB unit VHINJM2904M-2 IC(NJM2904M) [IC102] VRS-HT3AA510J Resistor(1W 51 [JP21] VHPPC817X4/-1 Photo coupler(PC817X4) [PC1] VHPSG206S//-1 Photo transistor(SG206S) [PH1] VHPSG206S//-1 Photo transistor(SG206S) [PH2] VSKRA102M//-3 Transistor(KRA102M) [Q6] VSKTC3875GR-1 Transistor(KTC3875GR) [Q100] VSKRC106S//-1 Transistor(KRC106S)

  • Page 70: Operation Panel Pwb Unit

    UX-A255U PRICE PART DESCRIPTION PARTS CODE RANK MARK RANK [8] Power supply PWB unit 0CBUZZ0203ZZ/ Inductor(RS908) [L2] 0CBLRZ6803ZP/ Heat sink [MT2] 0CBUDC0062MZ/ Photo coupler(PS2501-1L) [PC1] 0CBUAG0225AZ/ FET(FS7KM) [Q1] 0CBUAC0255AM/ Transistor(2SC4115S) [Q2] 0CBUAC0264AK/ Transistor(2SC1741AS) [Q3] 0CBUAC0034EL/ Transistor(2SC1740S) [Q4] 0CBUEEC225CF/ Resistor(1/2W 2.2M...
  • Page 71 UX-A255U I n d e x x PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE MARK MARK MARK RANK RANK RANK RANK RANK RANK MSPRD3291XHZZ 1-54 QSW-M2294XHZZ CCNWN484AXH01 MSPRD3292XHZZ 1-55 CGERH2314XH04 MSPRD3293XHZZ 3-14 QSW-Z2317XHZZ 7-80 CGERH2566XH01...
  • Page 72 UX-A255U PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE MARK MARK MARK RANK RANK RANK RANK RANK RANK VCKYCY1AF105Z 6-41 VHINJM2113M-1 6-105 VRS-CY1JB271J 6-121 6-42 VHINJM2904M-2 7-38 6-122 6-43 7-39 6-130 6-44 VHINJM78L05A1 7-79 6-164 6-46...
  • Page 73 UX-A255U PRICE PART PRICE PART PRICE PART PARTS CODE PARTS CODE PARTS CODE MARK MARK MARK RANK RANK RANK RANK RANK RANK 0CBUBC0336AZ/ 8-21 0CBUBDBE270C/ 8-56 0CBUBDBW5R6C/ 8-60 0CBUBDDA300A/ 8-58 0CBUBXAD4R3C/ 8-57 0CBUBXAD6R2C/ 8-59 0CBUBY0020AK/ 8-20 0CBUDC0062MZ/ 8-30 0CBUDXDAW682/ 8-50...
  • Page 74 UX-A255U © COPYRIGHT 2001 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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