Sharp LC-15S4U-S Service Manual
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Sharp LC-15S4U-S Service Manual

Sharp LC-15S4U-S Service Manual

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See also: Operating Manual
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
» IMPORTANT SERVICE SAFETY PRECAUTION .........................................................................................2
» SPECIFICATIONS ........................................................................................................................................5
» OPERATION MANUAL .................................................................................................................................6
» DIMENSIONS ...............................................................................................................................................8
» REMOVING OF MAJOR PARTS ..................................................................................................................9
» ADJUSTING PROCEDURE OF EACH SECTION ..................................................................................... 13
» PUBLIC MODE SETTING PROCEDURE ..................................................................................................23
» TROUBLE SHOOTING TABLE ..................................................................................................................28
» MAJOR IC INFORMATIONS ...................................................................................................................... 32
» BLOCK DIAGRAM ......................................................................................................................................34
» OVERALL WIRING DIAGRAM ...................................................................................................................36
» DESCRIPTION OF SCHEMATIC DIAGRAM ............................................................................................. 38
ËR/C, LED Unit ..........................................................................................................................................39
ËMAIN Unit .................................................................................................................................................40
ËANALOG Unit ...........................................................................................................................................50
» PRINTED WIRING BOARD ASSEMBLIES ................................................................................................60
» REPLACEMENT PARTS LIST.................................................................................................................... 73
» PACKING OF THE SET ..............................................................................................................................83
SHARP CORPORATION
SERVICE MANUAL
LCD COLOR TELEVISION
LC-15S4U-S
MODEL
CONTENTS
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-15S4U-S
S75L9LC15S4US
Page

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Summary of Contents for Sharp LC-15S4U-S

  • Page 1: Table Of Contents

    LC-15S4U-S SERVICE MANUAL S75L9LC15S4US LCD COLOR TELEVISION LC-15S4U-S MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    LC-15S4U-S IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: • Use an AC voltmeter having with 5000 ohm per volt, or...
  • Page 3 LC-15S4U-S PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ë La réparation ne peut être effectuée que par un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT exposées du coffret et une terre connue comme une conduite électrique ou une prise de terre branchée à...
  • Page 4 LC-15S4U-S Precautions for using lead-free solder 1 Employing lead-free solder "All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

  • Page 5: Specifications

    +32°F to +104°F (0°C to +40°C) ËAs a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for the LCD TV set improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be...

  • Page 6: Operation Manual

    LC-15S4U-S OPERATION MANUAL...
  • Page 7 LC-15S4U-S...

  • Page 8: Dimensions

    LC-15S4U-S DIMENSIONS Unit: inch (mm) 274 ) 106 ) 46 ) 65 ) 363 ) 308 ) 111 ) 181 ) 100 )

  • Page 9: Removing Of Major Parts

    LC-15S4U-S REMOVING OF MAJOR PARTS 1. Remove the stand cover fixing screws (1 pc.). 2. Remove the stand fixing screws (4 pcs.). 3. Remove the carrying handle fixing screws (4 pcs.). 4. Remove the terminal cover. 5. Remove the terminal screws (1 pc.).
  • Page 10 LC-15S4U-S 9. Remove the 4 lock screws from the analog PWB, and undo the claws a and b. Detach the chassis frame (left) from the analog PWB by pulling out the terminals. In the same way, undo the claws c and d, and detach the chassis frame (right) from the analog PWB by pulling out the terminals.
  • Page 11 LC-15S4U-S » Precautions in handling the LCD panels 1. Work in a clean room (with humidities below 50%). 2. Be sure to wear an anti-static armband. 3. Handle the panels on an electro-conductive mat. 4. Be careful not to fall, shake and shock the panels.
  • Page 12 LC-15S4U-S »Precautions in servicing the B side (backside) of the main PWB unit 1. Disconnect the FFC from between the main PWB (SC1202) and LCD panel unit (CN1), and then connect the service-specific extension FFC (flat cable) (QCNW-B784WJZZ). 2. Disconnect the FFC from between the main PWB (SC1201) and LCD panel unit (CN2), and then connect the service-specific extension FFC (flat cable) (QCNW-A556WJZZ).

  • Page 13: Adjusting Procedure Of Each Section

    LC-15S4U-S ADJUSTING PROCEDURE OF EACH SECTION The products have been factory-adjusted to the best settings. If any of them gets out of point or readjustment is needed due to a part replacement, take the following adjustment procedures. 1. Pre-adjustment preparations Keep the AC power cable directly plugged in a wall outlet.
  • Page 14 LC-15S4U-S 5. Take the following procedure when IC2009 (EEPROM) has been initialized or IC2001 (microprocessor) replaced. 5-1. Connect pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power. 5-2. Make sure "15" (inches) is selected for the screen size.

  • Page 15: Factory Settings

    LC-15S4U-S 6-3. White balance adjustment 1) Adjustment procedure Adjustment process menu page 3: RGB CUTOFF2, RGB-GAIN Feed the 40% white signal. Move the R- CUTOFF2 and B-CUTOFF2 settings within ±30 to adjust the white balance. Next feed the 80% white signal.
  • Page 16 LC-15S4U-S 7-2. Description of Factory Settings. Setting content/range Initial Value (AV1) (AV2) (COMPONENT1) MENU PICTURE AV MODE STANDARD/DYNAMIC/DYNAMIC(FIXED)/MOVIE/GAME DYNAMIC DYNAMIC DYNAMIC DYNAMIC ON/OFF BACKLIGHT BRIGHT/NORMAL/DARK/VARIABLE VARIABLE (STANDARD) (DYNAMIC) (DYNAMIC(FIXED) (MOVIE) (GAME) 1 (DARK) ~9 (NORMAL)~17 (BRIGHT) CONTRAST 0~60 BRIGHTNESS -30~+30...
  • Page 17 LC-15S4U-S 8. Lamp error detection 8-1. Functional description This LCD color television has a function (lamp error detection) to be turned off automatically for safety when the lamp or lamp circuit is abnormal. If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the followings occur.
  • Page 18 LC-15S4U-S LIST OF THE ADJUSTMENT PROCESS MODE MENU " For calling the adjustment process mode and keying in this mode, refer back to ADJUSTING PROCEDURE OF " EACH SECTION ADJUSTMENT PROCESS 1st LEVEL ITEM DEFAULT TABLE Initial Response precautions on servicing Page No.
  • Page 19 TINT SETTING (TV) NOT USED N358 AV TINT TINT SETTING (COMPOSITE, S VIDEO) NOT USED N358 TV SHARP V V PICTURE QUALITY SETTING (TV) NOT USED N358 AV SHARP V V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) NOT USED N358 TV SHARP H1...
  • Page 20 COLOR DENSITY SETTING (COMPOSITE, S VIDEO) NOT USED N443 AV TINT TINT SETTING (COMPOSITE, S VIDEO) NOT USED N443 AV SHARP V V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) NOT USED N443 AV SHARP H1 H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) NOT USED...
  • Page 21 TINT SETTING (TV) NOT USED PAL-N AV TINT TINT SETTING (COMPOSITE, S VIDEO) NOT USED PAL-N TV SHARP V V PICTURE QUALITY SETTING (TV) NOT USED PAL-N AV SHARP V V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) NOT USED PAL-N TV SHARP H1...
  • Page 22 1125I COLOR COLOR DENSITY SETTING (TV) NOT USED 1125I TINT TINT SETTING (TV) NOT USED 1125I SHARP V V PICTURE QUALITY SETTING (TV) NOT USED 1125I SHARP H1 H PICTURE QUALITY SETTING 1 (TV) NOT USED 1125I SHARP H2 H PICTURE QUALITY SETTING 2 (TV) NOT USED...

  • Page 23: Public Mode Setting Procedure

    LC-15S4U-S PUBLIC MODE SETTING PROCEDURE 1. How to start Public Mode » There are the following two ways to get the public mode setup screen displayed. 1 In the adjustment process mode, turn on "PUBLIC MODE". Also press the "CH (ù)" and "VOL (+)" keys on the set at once and turn on the power.
  • Page 24 LC-15S4U-S 2. How to exit Public Mode There are the following ways to quit the public mode setup screen. » Turn off "PUBLIC MODE" in the adjustment process mode. ( ) ← This way alone is not for quitting the setup screen, but for quitting the mode itself.
  • Page 25 LC-15S4U-S 5. On Setting Items * "EZ-SETUP" discussed below indicates "EZ-SETUP after the first power-on". (1) POWER ON FIXED " " " " Selection Selection between Variable Fixed (loop provided) Default – (Variable) " " Explanation Fixed setting, the power-off by the power key of the unit is invalidated and the image is kept being received.
  • Page 26 LC-15S4U-S (4) VOLUME FIXED LEVEL Selection Adjustment from 1 to 60 (no loop) Default " " Explanation The sound volume to be fixed by Volume fixed is determined. Limit in Setting None Exception None " " " " Remarks Setting is valid only when...
  • Page 27 LC-15S4U-S (8) ON SCREEN DISPLAY " " " " Selection Selection between Limited (loop provide) Default Explanation The following OSD displays are made ineffective. Displays of menu group, channel call, sound volume bar and direct key call " " Limit in Setting »...

  • Page 28: Trouble Shooting Table

    LC-15S4U-S TROUBLE SHOOTING TABLE...
  • Page 29 LC-15S4U-S TROUBLE SHOOTING TABLE (Continued)
  • Page 30 LC-15S4U-S TROUBLE SHOOTING TABLE (Continued)
  • Page 31 LC-15S4U-S TROUBLE SHOOTING TABLE (Continued)

  • Page 32: Major Ic Informations

    LC-15S4U-S MAJOR IC INFORMATIONS 1-1. Description of Pins of IC2001 (RH-iXA631WJN1Q or RH-iXA631WJZZQ) Pin No. Pin Name Pin Name Function TB1in CSYNC Composite sync signal TB0in IREM1 Remote control signal BYTE BYTE Connected to GND CNVss CNVss Connected to GND (connected to Vcc1 for CNVSS at flash write)
  • Page 33 LC-15S4U-S Pin No. Pin Name Pin Name Function HP_MUTE Headphones mute SP_MUTE1 Main speaker mute HP DET Headphones detect SSTBY Amplifier power control VSH_IN Panel gate driver voltage confirm L MUTE Line out audio mute V_IN/OUT Video input/output select SRESET...

  • Page 34: Block Diagram

    LC-15S4U-S BLOCK DIAGRAM LED_PWB LCD_Panel AUDIO_POWER_AMP HP (Front) SOUND_PROCESSOR IC3301 Jack IC3201 MAIN_PWB 35ø (STEREO) TUNER_PWB LCD PANEL RED,GREEN,BLUE DACA_OUT SP_MUTE DACM_OUT SLEEP CK, SP CVBS1-in 40 (S_STBY) ANA_IN1 SIF AMP Y-in 42 SP x2 ANA_IN2 T-CON SC1_IN I2C (33V)

  • Page 35: Overall Wiring Diagram

    LC-15S4U-S OVERALL WIRING DIAGRAM...

  • Page 36: Description Of Schematic Diagram

    LC-15S4U-S DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: 1. The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 110-240V. Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.

  • Page 37: Schematic Diagram Ër/C, Led Unit

    LC-15S4U-S SCHEMATIC DIAGRAM Ë R/C, LED Unit...
  • Page 38 LC-15S4U-S ËMAIN Unit-1/5...
  • Page 39 LC-15S4U-S ËMAIN Unit-2/5...
  • Page 40 LC-15S4U-S ËMAIN Unit-3/5...
  • Page 41 LC-15S4U-S ËMAIN Unit-4/5...
  • Page 42 LC-15S4U-S ËMAIN Unit-5/5...

  • Page 43: Ëanalog Unit

    LC-15S4U-S ËANALOG Unit-1/5...
  • Page 44 LC-15S4U-S ËANALOG Unit-2/5...
  • Page 45 LC-15S4U-S ËANALOG Unit-3/5...
  • Page 46 LC-15S4U-S ËANALOG Unit-4/5...
  • Page 47 LC-15S4U-S ËANALOG Unit-5/5...

  • Page 48: Ëmain Unit

    LC-15S4U-S PRINTED WIRING BOARD ASSEMBLIES MAIN Unit (Side-A)
  • Page 49 LC-15S4U-S R1722 SC1201 SC1203 C1713 L703 LUG2053 FB702 C1702 C1714 R1205 R1203 R1201 C1107 L1701 L1703 R1206 R1204 R1202 L706 FDC1 C2005 C2009 Q1705 IC1101 D2007 C848 C849 R757 C2008 C1104 X2001 D704 R756 R2058 C874 C852 C838 C853 FL2001...
  • Page 50 LC-15S4U-S MAIN Unit (Side-B)
  • Page 51 LC-15S4U-S TL1285 TL1264 TL1272 TL1279 TL1277 TL1202 TL1207 TL1212 TL1217 TL1222 TL1227 TL1238 TL1244 TL1248 TL1268 TL1206 TL1262 TL1266 TL1270 TL1274 TL1287 TL1283 TL1275 TL1204 TL1209 TL1214 TL1219 TL1224 TL1229 TL1242 TL1246 TL1250 R705 R725 R733 R722 R746 D1703 TL1203...
  • Page 52 LC-15S4U-S ANALOG Unit (Component Side)
  • Page 53 LC-15S4U-S F3701 LUG3404 J3701 R3701 R3731 R3723 P3703 F3702 R3733 R3411 R3724 C3406 C3712 J3404 C3710 R3408 C3407 C3711 C3307 C3713 R3721 R3720 D3404 D3403 C3499 R3539 C3498 R3428 L3407 R3426 R3540 C3500 L3408 C3413 Q3408 R3455 R3451 R3422 R3456...
  • Page 54 LC-15S4U-S R/C, LED Unit (Component Side) (QPWBSD413WJZZ) D4004 P4001 D4005 D4006 R4000 IC4000 RMC4000 D4001 J4000 R4001 D4000 C4001 D4002 C4003 C4000 Q4002 R/C, LED Unit (Chip Parts Side) (QPWBSD413WJZZ)

  • Page 55: Replacement Parts List

    2. NO. DE REF 3. NO. DE PIECE 4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. For in CANADA: Contact SHARP Electronics of Canada Limited location of SHARP Parts Distributor, Please call Toll-Free; Phone (416) 890-2100...
  • Page 56 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC847FE08 C807 VCKYCY1CB104KY J 0.1 Ceramic C808 VCKYCZ1AB104KY J 0.1 Ceramic MAIN Unit (Continued) C809 VCKYCZ1AB104KY J 0.1 Ceramic C810 VCKYCZ1AB104KY J 0.1 Ceramic D702 VHDRB051L40-1Y J Diode C811 VCKYCY1CB104KY J 0.1...
  • Page 57 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC847FE08 R752 VRS-CY1JF511JY J 510 1/16W Metal Oxide R754 VRS-CY1JF303JY J 30k 1/16W Metal Oxide MAIN Unit (Continued) R755 VRS-TW2HF272JY J 2.7k 1/2W Metal Oxide R756 VRS-TW2HF272JY J 2.7k 1/2W...
  • Page 58 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKC847FE08 R2066 VRS-CY1JF101JY J 100 1/16W Metal Oxide R2068 VRS-CY1JF101JY J 100 1/16W Metal Oxide MAIN Unit (Continued) R2069 VRS-CY1JF223JY J 22k 1/16W Metal Oxide R2070 VRS-CJ1JF101JY...
  • Page 59 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD412WE02 L6502 RCiLPA093WJZZ J Coil L6503 RCiLPA034WJZZ J Coil ANALOG Unit L6504 RCiLPA034WJZZ J Coil TRANSFORMER TUNER NOTE: THE PARTS HERES SHOWN ARE SUPPLIED AS AN å...
  • Page 60 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD412WE02 R3421 VRS-CY1JF101JY J 100 1/16W Metal Oxide R3422 VRS-TQ2BD750JY J 75 1/8W Metal Oxide ANALOG Unit (Continued) R3423 VRS-CY1JF101JY J 100 1/16W Metal Oxide R3424 VRS-CY1JF562JY J 5.6k 1/16W Metal Oxide...
  • Page 61 LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD412WE02 DUNTKD413WE02 ANALOG Unit (Continued) R/C, LED Unit INTEGRATED CIRCUITS R6500 VRS-TQ2BD362JY J 3.6k 1/8W Metal Oxide IC4000 VHiMM1616++-1Y J MM1616XBRE R6501 VRS-TQ2BD302JY J 3k 1/8W Metal Oxide...

  • Page 62: Cabinet And Mechanical Parts

    LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code XEBSN30P08000 J Screw, x10 CABINET AND MECHANICAL PARTS XEBS940P16000 J Screw, x4 CCABAB115WJ01 X Cabinet A Ass’y Not Available – Cabinet A — HDECQA474WJSA J R/C,LED Cover...
  • Page 63 LC-15S4U-S CABINET AND MECHANICAL PARTS 4-2-1 R/C, LED Unit 4-2-2 4-12 4-10 4-2-3 4-11 2-11 2-10 Main Unit Analog Unit...

  • Page 64: Packing Parts

    LC-15S4U-S Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKING PARTS SUPPLIED ACCESORIES (NOT REPLACEMENT ITEM) LHLDWA002WJSA J Cable Clamp, x1 SPAKCC167WJZZ – Packing Case — QACCDA023WJPA J AC Cord SPAKPA559WJZZ – Wrapping Paper — å...

  • Page 65: Packing Of The Set

    LC-15S4U-S PACKING OF THE SET...
  • Page 66 LC-15S4U-S COPYRIGHT © 2005 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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