Sharp LC-20E1H Service Manual

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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 ................................................................................................................................... 4

» OPERATION MANUAL ............................................................................................................................ 5

» DIMENSIONS .......................................................................................................................................... 8

» REMOVING OF MAJOR PARTS ............................................................................................................. 9

» ADJUSTING PROCEDURE OF EACH SECTION ................................................................................ 13

» TROUBLE SHOOTING TABLE .............................................................................................................. 18

» CHASSIS LAYOUT ................................................................................................................................ 22

» BLOCK DIAGRAM ................................................................................................................................. 24

» OVERALL WIRING DIAGRAM .............................................................................................................. 26

» DESCRIPTION OF SCHEMATIC DIAGRAM ........................................................................................ 28

» SCHEMATIC DIAGRAM ........................................................................................................................ 29

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................... 48

» REPLACEMENT PARTS LIST ............................................................................................................... 60

» PACKING OF THE SET ......................................................................................................................... 71

SERVICE MANUAL

LCD COLOUR TELEVISION

MODELS

CONTENTS

SHARP CORPORATION

LC-20E1H

LC-20E1M

LC-20E1H

LC-20E1M

S92P6LC-20E1H

Page

Table of Contents

Summary of Contents for Sharp LC-20E1H

Page 1: Table Of Contents
LC-20E1H LC-20E1M SERVICE MANUAL S92P6LC-20E1H LCD COLOUR TELEVISION LC-20E1H LC-20E1M MODELS 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-20E1H LC-20E1M IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be perfomed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: ground, such as electrical conduit or electrical ground WARNING connected to an earth ground.
Page 3 LC-20E1H LC-20E1M 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 4: Specifications
LC-20E1H LC-20E1M SPECIFICATIONS Items LC-20E1H/M Model LCD panel 19.7 Advanced Super View & BLACK TFT LCD Number of dots 921,600 dots VGA Video color systems World multi system TV Standard I/DK/M/BG Auto preset tuning TV Tuning System NICAM-BG, I, DK/IGR-BG...
Page 5: Operation Manual
LC-20E1H LC-20E1M OPERATION MANUAL...
Page 6 LC-20E1H LC-20E1M...
Page 7 LC-20E1H LC-20E1M...
Page 8: Dimensions
LC-20E1H LC-20E1M DIMENSIONS Unit: mm MAIN POWER PRESET 1...
Page 9: Removing Of Major Parts
LC-20E1H LC-20E1M REMOVING OF MAJOR PARTS 1. Remove the table stand fixing screws (4 pcs.). 2. Remove the two terminal covers. 3. Remove the terminal section fixing screws (2 pcs.). 4. Remove the cabinet B fixing screws (10 pcs.). 5. Remove the cabinet B after opening from the direction of an arrow.
Page 10 LC-20E1H LC-20E1M 10. Remove the inverter-A PWB fixing screws (2 pcs.). 11. Remove the inverter-B PWB fixing screws (1 pc.). 12. Remove the digital PWB fixing screws (3 pcs.). 13. Remove the analog PWB fixing screws (3 pcs.) and detatch the chassis frame cover fixing hooks.
Page 11 LC-20E1H LC-20E1M » 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 electroconductive mat. 4. Be careful not to fall, shake and shock the panels.
Page 12 LC-20E1H LC-20E1M Precautions at the time of the side B(back) service of digital unit. 1. Remove only SC2001 of the FFC for connection between Digital unit(SC2001) and Analog unit(SC3403), and connect the extended cable (QCNW-A324WJZZ) for service. 2. Remove only P2004 of the Cable for connection between Digital unit(P2004) and Analog unit(P3702), and connect the extended cable (QCNW-A552WJZZ) for service.
Page 13: Adjusting Procedure Of Each Section
LC-20E1H LC-20E1M ADJUSTING PROCEDURE OF EACH SECTION The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust as follows. 1. Preparation for Adjustments (1)Use the exclusive-use AC adapter or stable DC power supply.
Page 14 LC-20E1H LC-20E1M [5] Adjustment 5-1. +B adjustment (R3760 Variable resistor) 1) Receive the colour bar signal. 2) Adjust the voltage at pin (2) of P3702 to 5.00 ± 0.02 V. Note: The 5.0 V level is used as reference for all the line voltages. Make this adjustment as precisely as possible.
Page 15 LC-20E1H LC-20E1M 5-5. Screen position adjustment (Only for LC-20E1H) 1) Set the value of "PAL SFIF" setting in page 13 of adjustment process as "13" from "17". (Page 13 of adjustment process OSD) 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Set the "PAL SFIF"...
Page 16 LC-20E1H LC-20E1M [6] Lamp error detection 6-1. Functional description This LCD colour 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 17 LC-20E1H LC-20E1M • Setting screen of “PUBLIC MODE” PUBLIC MODE 1 ↔ 2 ··· ↔ 59 ↔ 60 MAXIMUM VOLUME VARIABLE ↔ FIXED VOLUME FIXED [VARIABLE] RESPOND ↔ LIMITED REMOTE CONTROL [RESPOND] RESPOND ↔ NO RESPOND USER CONTROL [RESPOND] YES ↔ NO...
Page 18: Trouble Shooting Table
LC-20E1H LC-20E1M TROUBLE SHOOTING TABLE No or Wrong Picture Does the IC801 test pattern appear properly? Does the IC1201 test pattern appear properly? Check the IC801 signal Are the waveforms at output line, IC801 itself pins (10), (11), (13), and its peripheral (15) and (17) of IC1201 circuits.
Page 19 LC-20E1H LC-20E1M TROUBLE SHOOTING TABLE (Continued)
Page 20 LC-20E1H LC-20E1M TROUBLE SHOOTING TABLE (Continued)
Page 21 LC-20E1H LC-20E1M TROUBLE SHOOTING TABLE (Continued)
Page 22: Chassis Layout
LC-20E1H LC-20E1M CHASSIS LAYOUT CONTROL Unit DIGITAL Unit ANALOG Unit R/C, LED Unit...
Page 23 LC-20E1H LC-20E1M INVBERTER-A Unit INVBERTER-B Unit...
Page 24: Block Diagram
LC-20E1H LC-20E1M BLOCK DIAGRAM ANALOG UNIT TV-V TUNER TU3201 SIF-AMP. Q3201 Q3202 SY, SC S-VIDEO L1, R1 INPUT V2/VO TV-V VIDEO SWITCH AUDIO VIDEO L2, R2 IC402 INPUT IN/OUT IN/OUT OUTPUT SWITCH SWITCH VOUT IC3501 Q3501-Q3505 Q3500 Y, PB, PR...
Page 25 LC-20E1H LC-20E1M DIGITAL UNIT SY, SC VIDEO DECODER AV1 V (VPC) IC801 CONTROLLER VOUT IC1201 PANEL FIFO DY, PB, PR IC1202 3.3V REG. IC702 GRADUATION POWER FOR CK, VD, HD, OSD-RGB IC1102-IC1108 3 WIRE IC1101 IC1110 IC1111 IC1112 BUS-SWITCH IC1114...
Page 26: Overall Wiring Diagram
LC-20E1H LC-20E1M OVERALL WIRING DIAGRAM...
Page 27 LC-20E1H LC-20E1M...
Page 28: Description Of Schematic Diagram
LC-20E1H LC-20E1M DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: 1. The voltages at test points are measured on exclusive AC adaptor and the stble supply voltage of AC 120V. 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 29: Schematic Diagram
LC-20E1H LC-20E1M SCHEMATIC DIAGRAM Ë R/C, LED and CONTROL Unit...
Page 30 LC-20E1H LC-20E1M Ë DIGITAL Unit-1/4...
Page 31 LC-20E1H LC-20E1M...
Page 32 LC-20E1H LC-20E1M Ë DIGITAL Unit-2/4...
Page 33 LC-20E1H LC-20E1M...
Page 34 LC-20E1H LC-20E1M Ë DIGITAL Unit-3/4...
Page 35 LC-20E1H LC-20E1M...
Page 36 LC-20E1H LC-20E1M Ë DIGITAL Unit-4/4...
Page 37 LC-20E1H LC-20E1M...
Page 38 LC-20E1H LC-20E1M Ë ANALOG Unit-1/2 (LC-20E1H/M)
Page 39 LC-20E1H LC-20E1M...
Page 40 LC-20E1H LC-20E1M Ë ANALOG Unit-2/2 (LC-20E1H/M)
Page 41 LC-20E1H LC-20E1M...
Page 42 LC-20E1H LC-20E1M Ë ANALOG Unit-1/2 (LC-20E1M(X))
Page 43 LC-20E1H LC-20E1M...
Page 44 LC-20E1H LC-20E1M Ë ANALOG Unit-2/2 (LC-20E1M(X))
Page 45 LC-20E1H LC-20E1M...
Page 46 LC-20E1H LC-20E1M Ë INVERTER-A Unit...
Page 47 LC-20E1H LC-20E1M Ë INVERTER-B Unit...
Page 48: Printed Wiring Board Assemblies
LC-20E1H LC-20E1M PRINTED WIRING BOARD ASSEMBLIES DIGITAL Unit (Side-A)
Page 49 LC-20E1H LC-20E1M FB7003 FL7004 C7047 C7122 D7701 SC2001 R7023 R7024 R7025 C7105 C7046 R417 R418 IC7201 C7203 C7053 R7204 C703 C7201 R423 IC7001 C7202 IC402 R424 C7005 D2002 C410 R7003 R7112 D2003 C2021 R2050 C7101 FL7001 C7027 R7001 C7059 R7106...
Page 50 LC-20E1H LC-20E1M DIGITAL Unit (Side-B)
Page 51 LC-20E1H LC-20E1M IC7102 IC7002 IC7701 R7704 R7047 R717 R719 L7003 C7021 R7053 R716 C7020 R7038 C7062 C7018 R7040 C7017 C7032 C7004 C7058 C7041 C7014 C7060 C7013 L7002 C7061 R7002 R7104 R7103 R7035 R7007 R7006 Q7002 R7008 Q7102 Q7101 R7009 R7101...
Page 52 LC-20E1H LC-20E1M LED Unit (Side-A) D4022 R4023 Q4004 D4012 Q4007 R4032 R4024 D4014 D4015 R4029 LED Unit (Chip Parts Side-A) CONTROL Unit (Side-A) (QPWBSB477WJZZ) CONTROL Unit (Chip Parts Side-A) (QPWBSB477WJZZ)
Page 53 LC-20E1H LC-20E1M ANALOG Unit (Side-A)
Page 54 LC-20E1H LC-20E1M P3704 R3756 R3701 C3700 D3703 R3718 FB3701 C3711 C3713 R3721 R3720 FB3709 R3717 C3703 R3768 R3706 IC3701 R3703 R3707 C3706 R3708 R3705 C3705 R3711 C3707 R3709 R3760 C3719 R3727 R3732 C3725 C3716 L3704 Q3704 R3762 Q3707 R3746 R3745 R3743...
Page 55 LC-20E1H LC-20E1M P3602 P3601 P3500 P3502P3501 D3602 C3607 D3601 R3757 R3605 C3606 Q3602 C3603 C3605 R3604 R3608 R3607 C3602 C3604 C3601 Q3601 C3600 D3703 R3718 D3607 C3608 FB3701 C3609 C3711 C3713 D3608 R3721 R3720 R3722 FB3709 R3610 FB3700 C3712 C3368...
Page 56 LC-20E1H LC-20E1M INVERTER-A Unit (Side-A)
Page 57 LC-20E1H LC-20E1M Q6706 Q6708 T6705 Q6707 R6722 D6700 Q6704 R6721 R6720 Q6705 Q6703 T6704 C6707 R6704 T6703 T6702 R6703 R6702 C6703 R6701 Q6701 R6700 Q6700 C6702 T6701 T6700 INVERTER-A Unit (Chip Parts Side-A)
Page 58 LC-20E1H LC-20E1M INVERTER-B Unit (Side-A)
Page 59 LC-20E1H LC-20E1M T6709 T6708 T6707 Q6714 T6706 D6701 C6718 R6715 R6714 INVERTER-B Unit (Chip Parts Side-A)
Page 60: Replacement Parts List
– CONTROL Unit (LC-20E1H/M) — Q401 VS2SC3928AR-1Y J 2SC3928AR DUNTKB477DE06 – CONTROL Unit (LC-20E1M(X)) — Q402 VS2SA1037KQ-1Y J 2SA1037KQ DUNTKB478DE03 – R/C, LED Unit (LC-20E1H/M) — Q711 VS2SA1037KQ-1Y J 2SA1037KQ DUNTKB478DE06 – R/C, LED Unit (LC-20E1M(X)) — Q712 VSDTC144EE/-1Y J DTC144EE DUNTKB590DE01 –...
Page 61 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA670FE35 C835 VCEAPF1CW107MY J 100 Electrolytic C836 RC-KZ1025CEZZY Ceramic DIGITAL UNIT (Continued) C837 RC-KZ1025CEZZY Ceramic C838 VCEAPF0GW107MY J 100 Electrolytic PACKAGED CIRCUITS C839 RC-KZ1025CEZZY Ceramic X801...
Page 62 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA670FE35 R1001 VRS-CY1JF102JY J 1k 1/16W Metal Oxide R1002 VRS-CY1JF103FY J 10k 1/16W Metal Oxide DIGITAL UNIT (Continued) R1003 VRS-CY1JF103FY J 10k 1/16W Metal Oxide R1005 VRS-CY1JF103FY J 10k 1/16W Metal Oxide C1225 VCKYCY1EF104ZY J 0.1...
Page 63 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA670FE35 R2013 VRS-CA1JF223JY J 22k 1/16W Metal Oxide R2014 VRS-CA1JF101JY J 100 1/16W Metal Oxide DIGITAL UNIT (Continued) R2015 VRS-CB1JF331JY J 330 1/16W Metal Oxide R2016 VRS-CY1JF103JY...
Page 64 J Crystal, 18.432MHz TUNER COILS NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY. L3201 VP-1M220J2R9NY J Peaking 22µH TU3201 VTUVT2U5CD553 J Tuner(LC-20E1H/M) L3202 RCiLPA027WJZZ J Coil TU3201 VTUVT2U5CD558 J Tuner(LC-20E1M(X)) L3301 VP-1M101J7R7NY J Peaking 100µH...
Page 65 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB476DE03(LC-20E1H/M) C3741 VCEAPF1HN225MY J 2.2 Electrolytic DUNTKB476DE06(LC-20E1M(X)) C3750 VCEA4A1CN108M J 1000 Electrolytic ANALOG UNIT (Continued) RESISTORS C3364 VCEAPF1HN105MY J 1 Electrolytic R3201 VRS-CY1JF102JY J 1k 1/16W Metal Oxide...
Page 66 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB476DE03(LC-20E1H/M) R3740 VRS-CY1JF473FY J 47k 1/16W Metal Oxide DUNTKB476DE06(LC-20E1M(X)) R3741 VRS-CY1JF123FY J 12k 1/16W Metal Oxide ANALOG UNIT (Continued) R3742 VRS-CY1JF182FY J 1.8k 1/16W Metal Oxide R3743 VRS-CY1JF122FY J 1.2k 1/16W Metal Oxide...
Page 67 LC-20E1H LC-20E1M Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB477DE03(LC-20E1H/M) DUNTKB590DE01 DUNTKB477DE06(LC-20E1M(X)) INVERTER-A UNIT CONTROL UNIT DIODES TRANSISTORS D4008 RH-EX1283CEZZY J Zener Diode, 18V Q6700 VSFZT1053A/-1Y J FZT1053A D4009 RH-EX1271CEZZY J Zener Diode, 12V Q6701 VSFZT1053A/-1Y...
Page 68 J Speaker, x2 L6708 RCiLPA034WJZZ J Coil 1-13 XETSD40P12000 J Screw, x8 TRANSFORMERS CCABBA040WJ04 J Cabinet B Ass’y(LC-20E1H) BC å T6706 RTRNZ0806CEZZQ J Transformer CCABBA040WJ05 J Cabinet B Ass’y(LC-20E1M) BC å T6707 RTRNZ0806CEZZQ J Transformer CCABBA040WJ06 J Cabinet B Ass’y(LC-20E1M(X)) BC Not Available å...
Page 69 LC-20E1H LC-20E1M CABINET AND MECHANICAL PARTS Control PWB Inverter-A PWB 1-12 1-13 Digital PWB Inverter-B 1-11 1-10 R/C, LED PWB 1-13 1-12 Analog PWB 5-20 5-10 5-11 5-20 5-19 5-12 5-19 5-17 5-16 5-19 5-21 5-18 5-19 5-15 5-14 5-13...
Page 70 Part No. Description Code CABINET AND MECHANICAL PARTS SUPPLIED ACCESSORIES (Continued) Not Available – Serial No. Label — QACCB0016TAZZ J AC Cord(LC-20E1H) å LANGT9032CEFW J Reinforcement Angle QACCK0006TAZZ J AC Cord(LC-20E1M) å QCNW-6058CEZZ J Connecting Cord QACCL0020TAZZ J AC Cord(LC-20E1M(X)) å...
Page 71: Packing Of The Set
Buffer Material (Partition) (SPAKFA093WJZZ) AC Cord (QACCB0016TAZZ) (LC-20E1H) (QACCK0006TAZZ) (LC-20E1M) AC Adapter (QACCL0020TAZZ) (LC-20E1M(X)) (UADP-0241CEPZ) Infrared R/C Unit (RRMCGA085WJSA) Antenna Cable (QCNWG0008CEZZ) Buffer Material (Bottom) (SPAKXA036WJZZ) No. Label (TLABK0001TAZZ) Packing Case (LC-20E1H) (SPAKCA278WJZZ) Packing Case (LC-20E1M/M(X)) (SPAKCA279WJZZ) Not replacement items.
Page 72 LC-20E1H LC-20E1M COPYRIGHT © 2002 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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Sharp LC-20E1H Service Manual

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