Sharp LC-20B2UB Manuale di Servizio

LC-20B2UALC-20B2UBSERVICE MANUALIn the interests of user-safety (Required by safety regulations in some countries) the set should be restoredto its or

10LC-20B2UALC-20B2UB6. Remove the digital PWB fixing screws (3 pcs.).7. Remove the inverter-A PWB fixing screws (2 pcs.).8. Remove the inverter-B PWB

11LC-20B2UALC-20B2UB» Precautions in handling the LCD panels1. Work in a clean room (with humidities below 50%).2. Be sure to wear an anti-static armb

12LC-20B2UALC-20B2UBADJUSTING PROCEDURE OF EACH SECTIONThe best adjustment is made before shipping. If any position deviation is found or after part r

13LC-20B2UALC-20B2UB4.Adjustments1 B+ Adjustment(R3760)2 Inch Size setup(If E2PROM is replaced)(IC2004)3 Common-bias adjustment4 TAMP adjustment5 Whit

14LC-20B2UALC-20B2UB5.Shipping setting listChannel...

15LC-20B2UALC-20B2UBTest patterns in adjustment process mode[1] IC801 (Video decoder) test patterns1-1. Getting the test patterns displayedPut the scr

16LC-20B2UALC-20B2UBNo. Pin name Function1 V HOLD2 HLF3 MAIN SW4 TIMELED5 M/S OUT6 CSYNC7 IREMI8 GND9 GND10 XCIN11 XOUT12 RESET13 XOUT14 GND15 XIN16 V

17LC-20B2UALC-20B2UBAdjustment process mode menus at a glancePage ItemInitial settingFunction Adjust/modify1 INCH SIZE 20 Inch unit select AdjustmentM

18LC-20B2UALC-20B2UBPage ItemInitial settingFunction Adjust/modify6 I2C DATA 0 I2C bus control IC data write & readI2C DATA WAIT Write & read

19LC-20B2UALC-20B2UBPage ItemInitial settingFunction Adjust/modify11 PAL AV COLOR 2500 Color density setting (composite, S video)PAL AV TINT +56 Color

2LC-20B2UALC-20B2UBCAUTION: FOR CONTINUEDPROTECTION AGAINST A RISK OFFIRE REPLACE ONLY WITH SAMETYPE F3701 (2.0A, 125V), F3702(1.6A, 125V), F6700 (1.0

20LC-20B2UALC-20B2UBPage ItemInitial settingFunction Adjust/modify16 AFT UP 2.7 AFT reference voltageAFT DOWN 1.8 AFT reference voltageNTSC 01 8C Init

21LC-20B2UALC-20B2UBPage ItemInitial settingFunction Adjust/modify18 V255 255 Gradation power reference voltageV255 BIAS 127 Gradation power reference

22LC-20B2UALC-20B2UBTROUBLE SHOOTING TABLENoNo Power (Power LED indicator still in red)Go to the adjustment process mode.Move the cursor to ERROR NO R

23LC-20B2UALC-20B2UBTROUBLE SHOOTING TABLE (Continued)Check all the settings on the microprocessor’s adjust process menu.No pictureNo picture at allYe

24LC-20B2UALC-20B2UBNo picture and soundNo colorNo TV colorNo S-VIDEO colorYesNoDo F3701and F3702 function?Check all the settings on the microprocesso

25LC-20B2UALC-20B2UBTROUBLE SHOOTING TABLE (Continued)No sound from speakersYesNoIs pin (53) of IC2001 at “L”?Check all the settings on the microproce

26LC-20B2UALC-20B2UB87109654321AB CDEFGHCHASSIS LAYOUTDIGITAL UnitCONTROL UnitRC/LED UnitANALOG Unit

27LC-20B2UALC-20B2UB1716 1918151413121110INVERTER-B UnitINVERTER-A Unit

28LC-20B2UALC-20B2UB87109654321AB CDEFGHBLOCK DIAGRAMINVERTERQ6700, Q6701T6700, T6701Q6703, Q6704T6702, T6703Q6706, Q6707T6704, T6705AV1S-VIDEOINPUTIN

29LC-20B2UALC-20B2UB1716 1918151413121110LCDPANELVIDEODECODER(VPC)IC801MPUIC2001E2PROMIC2004RESETIC20025V REG.IC7033.3V REG.IC702DEOTCH402FIFOIC1202LC

3LC-20B2UALC-20B2UBPRECAUTION: POUR LAPROTECTION CONTINUE CONTRELES RISQUES D'INCENDIE,REMPLACER LE FUSIBLE PAR UNFUSIBLE DE MEME TYPE F3701(2.0A

30LC-20B2UALC-20B2UBVOLTAGE MEASUREMENT CONDITION:1. The voltages at test points are measured onexclusive AC adaptor and the stble supply voltageof AC

31LC-20B2UALC-20B2UB654321ABCDEFGHSCHEMATIC DIAGRAMËCONTROL and RC/LED Unit

32LC-20B2UALC-20B2UB87109654321AB CDEFGHËDIGITAL Unit-1/5

33LC-20B2UALC-20B2UB1716 1918151413121110

34LC-20B2UALC-20B2UB87109654321AB CDEFGHËDIGITAL Unit-2/5

35LC-20B2UALC-20B2UB1716 1918151413121110

36LC-20B2UALC-20B2UB87109654321AB CDEFGHËDIGITAL Unit-3/5

37LC-20B2UALC-20B2UB1716 1918151413121110

38LC-20B2UALC-20B2UB87109654321AB CDEFGHËDIGITAL Unit-4/5

39LC-20B2UALC-20B2UB1716 1918151413121110

4LC-20B2UALC-20B2UBPrecautions for using lead-free solder1 Employing lead-free solder"Digital PWB" of this model employs lead-free solder. T

40LC-20B2UALC-20B2UB87109654321AB CDEFGHËDIGITAL Unit-5/5

41LC-20B2UALC-20B2UB1716 1918151413121110

42LC-20B2UALC-20B2UB87109654321AB CDEFGHËANALOG Unit-1/2

43LC-20B2UALC-20B2UB1716 1918151413121110

44LC-20B2UALC-20B2UB87109654321AB CDEFGHËANALOG Unit-2/2

45LC-20B2UALC-20B2UB1716 1918151413121110

46LC-20B2UALC-20B2UB654321ABCDEFGHËINVERTER-A Unit

47LC-20B2UALC-20B2UB654321ABCDEFGHËINVERTER-B Unit

48LC-20B2UALC-20B2UB654321ABCDEFGHPRINTED WIRING BOARD ASSEMBLIESDIGITAL Unit (Side-A)CONTROL Unit (Side-A)

49LC-20B2UALC-20B2UB654321ABCDEFGHDIGITAL Unit (Side-B)CONTROL Unit (Side-B)

5LC-20B2UALC-20B2UBSpecificationsItemsLC-20B2UA/BModelLCD panel 19.7” TFT LCDNumber of dots 921,600 dots VGAVideo color systems N358, N443, PAL, PAL-M

50LC-20B2UALC-20B2UB654321ABCDEFGHINVERTER-A Unit (Side-A)INVERTER-B Unit (Side-A)RC/LED Unit (Side-A)

51LC-20B2UALC-20B2UB654321ABCDEFGHANALOG Unit (Side-A)

52LC-20B2UALC-20B2UB87109654321AB CDEFGHDIGITAL Unit (Chip Parts Side-A)C7024C7025R7023 R7024X7001IC7001C7005Q7001R7003R7048C7055R7042R7043C7059FL7102

53LC-20B2UALC-20B2UB1716 1918151413121110162163104C1112R1117R1152R1164R1190R1191 R1151C1111C1133R1182C1110C1126C1109R1116R1140R1153R1189C1107R1115R112

54LC-20B2UALC-20B2UB87109654321AB CDEFGHDIGITAL Unit (Chip Parts Side-B)R1236R1235FD2IC1202C1202C839R816C818C813FB801L1203C1215L1205R1148R1147C1155C12

55LC-20B2UALC-20B2UB1716 191815141312111006C1120R1121IC1102R1198R1102R1146R1158C1103R1150IC1107R1104C1154IC1108R1032C1124C1115IC1114C1146C1132R1028IC1

56LC-20B2UALC-20B2UB87109654321AB CDEFGHP3704J3701C3210R3207J3500R3550P3504R3530R3551C3511R3532R3558R3531R3411R3410SC3405R3413 C3401R3412R3409C3325R33

57LC-20B2UALC-20B2UB1716 1918151413121110ANALOG Unit (Chip Parts Side)C3381C333004C3341C3390C3342C3350D3709741R3739R3738R3740C37190709707711C3705708R3

58LC-20B2UALC-20B2UB87109654321AB CDEFGHINVERTER-A Unit (Chip Parts Side)FH6704L6704Q6706FH6705R6710Q6707R6708C6713Q6708R6711C6712R6709R6722R6707R6705

59LC-20B2UALC-20B2UB1716 1918151413121110C6704T6702R6703R6702C6703Q6702R6701Q6701R6700Q6700C6702C6701L6700C6725C6700T6701T6700FDC1P6700P6701

6LC-20B2UALC-20B2UBOperation ManualTV/VIDEO, CH ()/(), VOL (+)/(–), and MENU on the main unit have the same functions as the same buttonson the remote

60LC-20B2UALC-20B2UB654321ABCDEFGHINVERTER-B Unit (Chip Parts Side)R6719R6718C6723Q6714FH6708C6724FH6709C6719R6724R6723D6701P6706FH6707 FH6706R6715 R6

61LC-20B2UALC-20B2UB654321ABCDEFGHCONTROL Unit (Chip Parts Side)RC/LED Unit (Chip Parts Side)P4005D4013RMC4002R4029R4024D4014Q4003R4030R4031D4015Q4004

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code62LC-20B2UALC-20B2UBPRINTED WIRING BOARD ASSEMBLIES(NOT REPLACEMENT ITEM)DUNT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code63LC-20B2UALC-20B2UBQ2007 VSDTC144EE/-1 J DTC144EE AAQ7001 VS2SA1037KQ-1 J 2S

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code64LC-20B2UALC-20B2UBC1134 VCKYCY1EF104Z J 0.1 25V Ceramic AAC1135 VCKYCY1EF10

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code65LC-20B2UALC-20B2UBR414 VRS-CY1JF105J J 1M 1/16W Metal Oxide AAR415 VRS-CY1J

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code66LC-20B2UALC-20B2UBR1203 VRS-CF1JP220JY J 22 1/16W Metal Oxide ACR1204 VRS-C

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code67LC-20B2UALC-20B2UBFB7102 RBLN-0059CEZZ J Ferrite Bead ABFB7103 RBLN-0059CEZ

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code68LC-20B2UALC-20B2UBC3334 VCKYCY1EF104Z J 0.1 25V Ceramic AAC3335 VCKYCY1HB27

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code69LC-20B2UALC-20B2UBR3354 VRS-CY1JF101J J 100 1/16W Metal Oxide AAR3355 VRS-C

7LC-20B2UALC-20B2UBFRONT AND REAR CONTROL OPTIONS (Continued)Before connecting a connection cord into the rear terminal, remove the back cover. Push i

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code70LC-20B2UALC-20B2UBJ3701 QJAKE0193CEZZ J(DC POWER INPUT(DC 13V))AKP3502 QPLG

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code71LC-20B2UALC-20B2UBDUNTKB133DE01INVERTER-B UNITTRANSISTORSQ6709 VSFZT1053A/-

72LC-20B2UALC-20B2UB654321ABCDEFGHCABINET AND MECHANICAL PARTSDE112221242424181617182524INVERTER-A UNITINVERTER-BUNIT2632-2152-12672623DIGITAL UNIT91

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code73LC-20B2UALC-20B2UBCABINET AND MECHANICAL PARTS1 CCABA2469CE01 J Front Cabin

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code74LC-20B2UALC-20B2UBSUPPLIED ACCESSORIESLHLDW0109CESA JCable Clamp, x2(LC-20B

75LC-20B2UALC-20B2UBPACKING OF THE SET★ Packing Case(SPAKC5679CEZZ(LC-20B2UA))(SPAKCA110WJZZ(LC-20B2UB))★ Buffer Material(Bottom)★ Buffer Material(Top

LC-20B2UALC-20B2UBCOPYRIGHT © 2002 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval system,

8LC-20B2UALC-20B2UBDimensions(Unit: inch/mm)15-55/64 /40314-29/32 /3794-7/32 /107.32-25/64 /60.89-1/32 /229.42-55/64 /72.624-51/64 /63018-41/64 /473.5

9LC-20B2UALC-20B2UBREMOVING OF MAJOR PARTS1. Remove the two back covers.2. Remove the table stand fixing screws (4 pcs.).3. Remove the rear cabinet fi