Sharp LC-20B8U Service Manual

LC-20B8U-SLC-20B9U-SLC-20B9U-SMSERVICE MANUALIn the interests of user-safety (Required by safety regulations in some countries) the set should be rest

10LC-20B8U-SLC-20B9U-SLC-20B9U-SM10. Remove the inverter PWB fixing screws (3 pcs.).11. Remove the power PWB fixing screws (6 pcs.).12. Remove the sub

87109654321AB CDEFGH100LC-20B8U-SLC-20B9U-SLC-20B9U-SMPOWER Unit (Component Side)

1011716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH102LC-20B8U-SLC-20B9U-SLC-20B9U-SMPOWER Unit (Wiring Side)

1031716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH104LC-20B8U-SLC-20B9U-SLC-20B9U-SMPOWER Unit (Chip Parts Side)TL7788R7714R7715R7718R7755Q7751R7757R7779R7783D7737Q7754Q7755R7752C7

1051716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SMTL7744C7747C7746C7745R7766C7749TL7752C7750TL7764TL7760TL7757TL7756TL7749TL7746R7764C7743TL7765T

87109654321AB CDEFGH106LC-20B8U-SLC-20B9U-SLC-20B9U-SMINVERTER Unit (Chip Parts Side)INVERTER Unit (Component Side)

1071716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

108654321ABCDEFGHLC-20B8U-SLC-20B9U-SLC-20B9U-SM

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code109LC-20B8U-SLC-20B9U-SLC-20B9U-SM★ MARK: SPARE PARTS-DELIVERY SECTION★ MAR

11LC-20B8U-SLC-20B9U-SLC-20B9U-SM» Precautions in handling the LCD panel1. Handle it in a clean room. (above 50% humidity)2. The worker must wear an e

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code110LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD041FE03 (LC-20B9U-S/SM)DUNTKD041FE06

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code111LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD041FE03 (LC-20B9U-S/SM)DUNTKD041FE06

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code112LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD041FE03 (LC-20B9U-S/SM)DUNTKD041FE06

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code113LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD041FE03 (LC-20B9U-S/SM)DUNTKD041FE06

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code114LC-20B8U-SLC-20B9U-SLC-20B9U-SMTUNERNOTE: THE PARTS HERES SHOWN ARE SUPPLI

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code115LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD042DE03 (LC-20B9U-S)DUNTKD042WE03 (LC

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code116LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD042DE03 (LC-20B9U-S)DUNTKD042WE03 (LC

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code117LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD043FE03 (LC-20B9U-S)DUNTKD043FM03 (LC

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code118LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD043FE03 (LC-20B9U-S)DUNTKD043FM03 (LC

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code119LC-20B8U-SLC-20B9U-SLC-20B9U-SMDUNTKD043FE03 (LC-20B9U-S)DUNTKD043FM03 (LC

12LC-20B8U-SLC-20B9U-SLC-20B9U-SMStep Part No. Description1 QCNW-C458WJQZExtension Cable 80-pin Main (SC1201)-LCD Panel (CN1)2 QCNW-D402WJQZ Extension

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code120LC-20B8U-SLC-20B9U-SLC-20B9U-SMRUNTKA134WJZZINVERTER UnitINTEGRATED CIRCUI

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code121LC-20B8U-SLC-20B9U-SLC-20B9U-SMRUNTKA134WJZZINVERTER Unit (Continued)R6713

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code122LC-20B8U-SLC-20B9U-SLC-20B9U-SMCABINET AND MECHANICAL PARTS(LC-20B8U-S,LC-

123654321ABCDEFGHLC-20B8U-SLC-20B9U-SLC-20B9U-SMCABINET AND MECHANICAL PARTS (LC-20B8U-S,LC-20B9U-SM)AACCJHIFDJCBDAALBBCEGKLIFEIKHB31284R/C, LEDPWB4-5

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code124LC-20B8U-SLC-20B9U-SLC-20B9U-SMCABINET AND MECHANICAL PARTS(LC-20B9U-S)1 C

125654321ABCDEFGHLC-20B8U-SLC-20B9U-SLC-20B9U-SMCABINET AND MECHANICAL PARTS (LC-20B9U-S)AACCJHIFDJCBDAALBBCEGKLIFEIKHB1-81-121-121-111-112341R/C, LED

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code126LC-20B8U-SLC-20B9U-SLC-20B9U-SMSUPPLIED ACCESORIESPACKING PARTS(NOT REPLAC

127LC-20B8U-SLC-20B9U-SLC-20B9U-SMPACKING OF THE SETS1S7S5S5S5S6X2X3X4S4S2S5X1X7S7ËLC-20B9U-SX5X6S1S7S5S5S5S3S6X2X3X4S4S2S5ËLC-20B8U-S, LC-20B9U-SMX

LC-20B8U-SLC-20B9U-SLC-20B9U-SMCOPYRIGHT © 2005 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retr

13LC-20B8U-SLC-20B9U-SLC-20B9U-SMADJUSTING PROCEDURE OF EACH SECTION1. Preparations before adjustment(1) Keep the AC power cable directly plugged in a

14LC-20B8U-SLC-20B9U-SLC-20B9U-SM(Onscreen display of adjustment process menu page 1)0112MIEPVE3ONRU-X4DCRBCT5EHOLH6LRIIC7SCPO8INN9ZOMT10EOR11RDO12EEL

15LC-20B8U-SLC-20B9U-SLC-20B9U-SMReference(Onscreen display of adjustment process menu page 2)5-4. White balance adjustment1) Adjustment procedure (Ca

16LC-20B8U-SLC-20B9U-SLC-20B9U-SMSetting ranges Initial values(TV) (INPUT1) (INPUT2) (INPUT3)MENU PICTURE AV MODE STANDARD/DYNAMIC/DYNAMIC(FIXED)/MOVI

17LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)1 MODE

18LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)PC AD

19LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)AUDIO

2LC-20B8U-SLC-20B9U-SLC-20B9U-SMCAUTION: FOR CONTINUEDPROTECTION AGAINST A RISK OFFIRE REPLACE ONLY WITH SAMETYPE F6701 (6.3A, 250V) ANDF7701 (3.15A,

20LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)DVP7 P

21LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)DVP11

22LC-20B8U-SLC-20B9U-SLC-20B9U-SMPage No. ItemInitialFunctionResponse precautions on servicingValue (Do not change other items than designated.)OTHERS

23LC-20B8U-SLC-20B9U-SLC-20B9U-SMPUBLIC MODE SETTING PROCEDURE1. How to start Public Mode» There are the following two ways to get the public mode set

24LC-20B8U-SLC-20B9U-SLC-20B9U-SM2. How to exit Public ModeThere are the following ways to quit the public mode setup screen.» Turn off "PUBLIC M

25LC-20B8U-SLC-20B9U-SLC-20B9U-SM5. On Setting Items* "EZ-SETUP" discussed below indicates "EZ-SETUP after the first power-on". (1

26LC-20B8U-SLC-20B9U-SLC-20B9U-SM(3) VOLUME FIXED LEVEL(4) R/C BUTTON(5) PANEL BUTTON(6) MENU BUTTONSelectionDefaultExplanationLimit in SettingExcepti

27LC-20B8U-SLC-20B9U-SLC-20B9U-SM(7) ON SCREEN DISPLAY(8) INPUT MODE STARTSelectionDefaultExplanationLimit in SettingOthersExceptionRemarksSelection b

28LC-20B8U-SLC-20B9U-SLC-20B9U-SM(9) INPUT MODE FIXEDSelectionDefaultExplanationLimit in SettingExceptionRemarksSelection between "Variable"

29LC-20B8U-SLC-20B9U-SLC-20B9U-SMTROUBLE SHOOTING TABLENo or Wrong PictureAre the waveforms at pins (84), (89) and (90)of IC801 as specified?Check IC8

3LC-20B8U-SLC-20B9U-SLC-20B9U-SMPRECAUTION: POUR LAPROTECTION CONTINUECONTRE LES RISQUESD'INCENDIE, REMPLACER LEFUSIBLE PAR UN FUSIBLE DEMEME TYP

30LC-20B8U-SLC-20B9U-SLC-20B9U-SMTROUBLE SHOOTING TABLE (Continued)Check the secondary load of T7001.Is pin (10) of IC7002 and IC7001 at "H"

31LC-20B8U-SLC-20B9U-SLC-20B9U-SMTROUBLE SHOOTING TABLE (Continued)No pictures come out (1/2).All pictures do not come out.No TV pictures come out.No

32LC-20B8U-SLC-20B9U-SLC-20B9U-SMTROUBLE SHOOTING TABLE (Continued)No sounds come out.No sounds come out from the speakers.YesYesNoNo sounds come out

33LC-20B8U-SLC-20B9U-SLC-20B9U-SMTROUBLE SHOOTING TABLE (Continued)YesNoYesNoNoYesNoNoYesYesNoYesNoNoYesYesYesNoNoYesYesNoNo colors come out.No S vide

34LC-20B8U-SLC-20B9U-SLC-20B9U-SMMAJOR IC INFORMATION1. IC2001 (RH-iXA628WJN1Q), (RH-iXA628WJZZQ) 1-1.Pin Connections1 2 3 4 5 6 7 8 9 10 11 12 13 1

35LC-20B8U-SLC-20B9U-SLC-20B9U-SMPin No. Pin Name I/O Pin Name Function1 P96/ANEX1/Sout4 O2 P95/ANEX0/CLK4 O3 P94/DA1/TB4in I PC-H PC signal HS freque

36LC-20B8U-SLC-20B9U-SLC-20B9U-SMPin No. Pin Name I/O Pin Name Function48 P46/CS2 O49 P45/CS1 O S_SEL AV selector switch50 P44/CS0 O VSHOUT Panel gate

37LC-20B8U-SLC-20B9U-SLC-20B9U-SM2. IC801(RH-iXB170WJZZQ) 2-1. Pin Connections2162152142132122112102092082072062052042032022012001991981971961951941

38LC-20B8U-SLC-20B9U-SLC-20B9U-SM 2-2. Pin FunctionsPin No. Pin name Function Pin status1 DVDD33 Digital 3.3V power2 PXD24 Pixel data signal (C)

39LC-20B8U-SLC-20B9U-SLC-20B9U-SMPin No. Pin name Function Pin status58 MPWEL MPSEL0='1' setting (parallel bus): Write enable lower (negativ

4LC-20B8U-SLC-20B9U-SLC-20B9U-SMPrecautions for using lead-free solder1 Employing lead-free solder"All PWBs" of this model employs lead-free

40LC-20B8U-SLC-20B9U-SLC-20B9U-SMPin No. Pin name Function Pin status97 QDRVHD Panel driver signal output D (variable horizontal period)98 QDRVHE Pane

41LC-20B8U-SLC-20B9U-SLC-20B9U-SMPin No. Pin name Function Pin status157 DGND Digital GND158 QBR0 Panel B signal (R) output159 QBR1 Panel B signal (R)

87109654321AB CDEFGH42LC-20B8U-SLC-20B9U-SLC-20B9U-SMBLOCK DIAGRAMV2-INV2-OUTL, R5VYV2-OUT5VI2CI2CSIFTUNERTU3401I2CTV-VSUB UNIT3.3V9V8V5V-12V31V9V5V8V

431716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SMCVIN5V1.8VI2C5V3.3V3.3VMAIN UNITI2CI2CI2CCSHP-L/R3.3V.03REG.IC2011MREG.IC805TV-V,V,SY, SC,YA-DCO

87109654321AB CDEFGH44LC-20B8U-SLC-20B9U-SLC-20B9U-SMOVERALL WIRING DIAGRAM

451716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

46LC-20B8U-SLC-20B9U-SLC-20B9U-SMVOLTAGE MEASUREMENT CONDITION:1. The voltages at test points are measured on thestable supply voltage of AC 120V. Si

47654321ABCDEFGHLC-20B8U-SLC-20B9U-SLC-20B9U-SMSCHEMATIC DIAGRAMËR/C, LED Unit (LC-20B9U-S)ËR/C, LED Unit (LC-20B8U-S, LC-20B9U-SM)

87109654321AB CDEFGH48LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-1/7 (LC-20B9U-S)

491716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

5LC-20B8U-SLC-20B9U-SLC-20B9U-SMSPECIFICATIONSItemsLCD panel 20" Advanced Super View & BLACK TFT LCDNumber of dots 2,359,296 dots XGAVideo co

87109654321AB CDEFGH50LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-1/7 (LC-20B8U-S, LC-20B9U-SM)

511716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH52LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-2/7 (LC-20B9U-S)

531716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH54LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-2/7 (LC-20B8U-S, LC-20B9U-SM)

551716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH56LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-3/7 (LC-20B9U-S)

571716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH58LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-3/7 (LC-20B8U-S, LC-20B9U-SM)

591716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

6LC-20B8U-SLC-20B9U-SLC-20B9U-SMOPERATION MANUALPart Names of the Main UnitControls• INPUT, CH ()/(), VOL (–)/(+) and MENU on the main unit have the s

87109654321AB CDEFGH60LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-4/7 (LC-20B9U-S)

611716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH62LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-4/7 (LC-20B8U-S, LC-20B9U-SM)

631716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH64LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-5/7 (LC-20B9U-S)

651716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH66LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-5/7 (LC-20B8U-S, LC-20B9U-SM)

671716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH68LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-6/7

691716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

7LC-20B8U-SLC-20B9U-SLC-20B9U-SMPart Names of the Remote ControlDISPLAYDisplays the receiving channel andthe current time for 10 seconds.AV MODE Selec

87109654321AB CDEFGH70LC-20B8U-SLC-20B9U-SLC-20B9U-SMËMAIN Unit-7/7

711716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH72LC-20B8U-SLC-20B9U-SLC-20B9U-SMËSUB Unit-1/2

731716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH74LC-20B8U-SLC-20B9U-SLC-20B9U-SMËSUB Unit-2/2

751716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH76LC-20B8U-SLC-20B9U-SLC-20B9U-SMËPOWER Unit-1/3 (LC-20B9U-S)

771716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH78LC-20B8U-SLC-20B9U-SLC-20B9U-SMËPOWER Unit-1/3 (LC-20B8U-S, LC-20B9U-SM)

791716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

8LC-20B8U-SLC-20B9U-SLC-20B9U-SMDIMENSIONSUnit: inch (mm))(1319/32(345)1731/64(444)251/8(638)59/32(134)917/32(242)1611/64(410.5)1521/64(389)29/64(54)1

87109654321AB CDEFGH80LC-20B8U-SLC-20B9U-SLC-20B9U-SMËPOWER Unit-2/3 (LC-20B9U-S)

811716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH82LC-20B8U-SLC-20B9U-SLC-20B9U-SMËPOWER Unit-2/3 (LC-20B8U-S, LC-20B9U-SM)

831716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH84LC-20B8U-SLC-20B9U-SLC-20B9U-SMËPOWER Unit-3/3

851716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH86LC-20B8U-SLC-20B9U-SLC-20B9U-SMËINVERTER Unit

871716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH88LC-20B8U-SLC-20B9U-SLC-20B9U-SMMAIN Unit (Side-A)PRINTED WIRING BOARD ASSEMBLIES

891716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

9LC-20B8U-SLC-20B9U-SLC-20B9U-SMREMOVING OF MAJOR PARTS1. Remove the stand cover fixing screw (1 pc.).2. Remove the stand fixing screws (4 pcs.).3. Re

87109654321AB CDEFGH90LC-20B8U-SLC-20B9U-SLC-20B9U-SMMAIN Unit (Chip Parts Side-A)C2004LUG2002SC2004C2014R2023C2013R2014R2004C2012R2013C2006C2005C2009

911716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SMR851C878R852R1106R8705FB806R850C889R8704C1114R1107C867C1115C1116IC805IC1101C1117R1108C891R1101C8

87109654321AB CDEFGH92LC-20B8U-SLC-20B9U-SLC-20B9U-SMMAIN Unit (Side-B)

931716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH94LC-20B8U-SLC-20B9U-SLC-20B9U-SMMAIN Unit (Chip Parts Side-B)R407R408D404D405TL1261R1714C1715C1725TL2124L1702R1218C1227R1216TL212

951716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SMTL12016104R805C1118TL1102R1750R807C871R1751C1102C1101R1752IC804R898Q1705C1107C1105C1106R804C1113

87109654321AB CDEFGH96LC-20B8U-SLC-20B9U-SLC-20B9U-SMSUB Unit (Component Side)

971716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM

87109654321AB CDEFGH98LC-20B8U-SLC-20B9U-SLC-20B9U-SMSUB Unit (Chip Parts Side)LUG3432C34743C3472C3464C3462C3471C3467C3470R3529R3519 Q3419R3530R3532C3

991716 1918151413121110LC-20B8U-SLC-20B9U-SLC-20B9U-SM1R3468D3302R3535C3482R3472C3447R3440R3464R3463C3449D3301C3483C3450C3484SC3402D3202R3524D3201R352