Sharp LC-20S1E Service Manual

Lcd colour television

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Operation manual (46 pages)

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Page 1 LC-20S1E SERVICE MANUAL S83H2LC-20S1E LCD COLOUR TELEVISION LC-20S1E MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be re- stored to its original condition and only parts identical to those specified should be used.
Page 2: Important Service Safety Precaution
LC-20S1E IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly 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-20S1E Precautions for using lead-free solder 1 Employing lead-free solder "MAIN PWB" 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
Cable clamp As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be...
Page 7: Dimensions
LC-20S1E DIMENSIONS Unit: mm 403.3...
Page 8: Removing Of Major Parts
LC-20S1E REMOVING OF MAJOR PARTS 1. Remove the stand fixing screws (4 pcs.). 2. Remove the terminal cover. 3. Remove the terminal section fixing screws (3 pcs.). 4. Remove the cabinet B fixing screws (9 pcs.). 5. Remove the cabinet B after opening from the direction of an arrow.
Page 9 LC-20S1E 8. Remove the 3 lock screws from the main PWB and undo the hooks a and b. Lifting the other PWBs close to the hooks, draw out the main PWB. 9. Remove the 4 lock screws from the tuner PWB and undo the hooks c and d. Detach the chassis frame (right), together with its terminals, from the tuner PWB.
Page 10 LC-20S1E » 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 11 LC-20S1E » Precautions at the time of the side B(back) service of main and Inverter unit. 1. Remove only SC2001 of the FFC for connection between Main unit(SC2001) and Tuner unit(SC3901), and con- nect the extended cable (QCNW-A369WJZZ) for service.
Page 12: 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. Preparation for adjustments Use the dedicated AC adaptor or stable DC power supply. LC-20S1E AC adaptor: UADP-A043WJPZ DC power supply: 12V 5.0A 1. Adjusting procedure • Checker adjustment Power ON (Adjustment processing mode) →...
Page 13 LC-20S1E 4. Initialization When the microprocessor (IC2001) or the EEPROM (IC2007, IC2009) has been replaced or when the EEPROM has been initialized, readjust the each adjustments. 4-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.
Page 14 LC-20S1E 5. Adjustment 5-1. +B adjustment...Page 1 +B-ADJ Adjust the voltage of the pin (4) of P1900 to 5.00 ±0.02V with R3714. Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely. 5-2. Counter-bias adjustment Vary the "COM BIAS" setting on Page 2 of the adjustment process mode so that the contrast be sharpest (black looks most sinking).
Page 15 LC-20S1E 6. Factory Setting 6-1. Perform a factory setting after completing all adjustments. 6-2. A "POWER" keys is made on with pushing an "TV/VIDEO" and "MENU" keys at the same time. 6-3. "K" of the inspection process mode is displayed on the screen upper left.
Page 22: Chassis Layout
LC-20S1E CHASSIS LAYOUT INVERTER Unit TUNER Unit R/C, LED Unit...
Page 23 LC-20S1E MAIN Unit...
Page 24: Block Diagram
LC-20S1E BLOCK DIAGRAM SIF1 ANTENNA ANA_IN1+ TUNER AI_L/R SC2_IN_L/R DACM_L/R IC1900 SC3902 SCART DACA_L/R SC1_OUT_L/R AUDIO AMP (AV1) IC1901 SC_L/RO SC1_IN_L/R AUDIO IN TV_V SC2_OUT_L/R AUDIO OUT CVBS/SY_IN VIDEO OUT TV/AV SDA/RXD SELECTOR IC803(1/2) R/G/B_IN IC802 SCL/TXD IC801 I C/UART...
Page 25 LC-20S1E L/R_IN AUDIO ACTIVE FILTER AUDIO IC1902~1904 SP_L/R SPEAKER P3301 POWER AMP CM_L/R IC3301 CA_L/R AUDIO AMP IC350 HP_L/R HEADPHONE J4021 VCC(+12V) JACK AO_L/R SC2_OUT_L/R AUDIO AMP IC3500 OFL1,2 J3900 AUDIO OUT YIN0~7 VPC_0~7 OFL REVERSE Q3600,3601 SYNC SIGNAL R0~7 G0~7 B0~7...
Page 26: Overall Wiring Diagram
LC-20S1E OVERALL WIRING DIAGRAM...
Page 27 LC-20S1E...
Page 28: Description Of Schematic Diagram
LC-20S1E 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 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-20S1E SCHEMATIC DIAGRAM Ë R/C, LED Unit...
Page 30 LC-20S1E Ë MAIN Unit-1/6...
Page 31 LC-20S1E...
Page 32 LC-20S1E Ë MAIN Unit-2/6...
Page 33 LC-20S1E...
Page 34 LC-20S1E Ë MAIN Unit-3/6...
Page 35 LC-20S1E...
Page 36 LC-20S1E Ë MAIN Unit-4/6...
Page 37 LC-20S1E...
Page 38 LC-20S1E Ë MAIN Unit-5/6...
Page 39 LC-20S1E...
Page 40 LC-20S1E Ë MAIN Unit-6/6...
Page 41 LC-20S1E...
Page 42 LC-20S1E Ë TUNER Unit-1/5...
Page 43 LC-20S1E...
Page 44 LC-20S1E Ë TUNER Unit-2/5...
Page 45 LC-20S1E...
Page 46 LC-20S1E Ë TUNER Unit-3/5...
Page 47 LC-20S1E...
Page 48 LC-20S1E Ë TUNER Unit-4/5...
Page 49 LC-20S1E...
Page 50 LC-20S1E Ë TUNER Unit-5/5...
Page 51 LC-20S1E...
Page 52: Inverter Unit
LC-20S1E Ë INVERTER Unit...
Page 53: Printed Wiring Board Assemblies
LC-20S1E PRINTED WIRING BOARD ASSEMBLIES R/C, LED Unit (Side-A) (QPWBSB985WJN3) C4202 P4001 P4003 C4001 D4005 C4201 D4006 D4004 R4007 R4001 Q4002 IC4201 D4001 D4002 J4021 R4005 R4002 R4003 D4007 D4011 R/C, LED Unit (Chip Parts Side-A) (QPWBSB985WJN3)
Page 54 LC-20S1E MAIN Unit (Side-A)
Page 55 LC-20S1E SC2001 TP2002 R2048 X1601 C2013 R2049 R1627 C1629 R1635 C1639 C1632 R1640 R2064 R1641 R2069 R1645 IC1601 C1643 R2099 R2074 R1638 C2022 R2075 R2111 R2097 R1663 R2110 R2101 R1637 R2129 R2056 C1634 R1631 C1628 C1630 R1632 R1630 C1633 C2006...
Page 56 LC-20S1E MAIN Unit (Side-B)
Page 57 LC-20S1E R2023 R1616 R1657 Q1606 C1644 D2001 R1621 R1603 R2057 R1647 C1649 R2060 R2038 R2065 R2062 Q2001 R2055 R2067 Q1604 R2059 R2014 D2002 IC2006 R1604 R1622 C2020 Q2005 R1607 R2124 R2100 C2031 R2054 R2076 R2034 R2032 D2003 R2078 C2023 R2083...
Page 58 LC-20S1E...
Page 59 LC-20S1E TUNER Unit (Side-A)
Page 60 LC-20S1E R4015 R4011 SW4006 SW4004 SW4003 SW4002 SW4007 J3300 F3302 FH6502 FH6501 FH6504 FH3301 FH3302 L3301 FB3305 TU2202 TU2201 R3302 R1946 R1948 C1959 C1965 R6517 R1944 R1960 C2217 R2215 C1958 C2220 R2207 C2207 R2227 R1943 C3309 C3313 Q2205 C2225 R2205...
Page 61 LC-20S1E SW4007 SW4008 P6500 FH6504 FH6503 Q6501 Q6500 C6502 Q6507 C6503 R6511 R6503 Q6502 P3601 R6512 T6502 R3606 R3605 L6500 Q6503 C3315 R6515 R6507 C6504 R6506 Q6506 C6508 C6507 R6513 C6509 R6514 R6516 C6511 R6504 R3300 L3701 Q3706 C3714 R3302...
Page 62 LC-20S1E TL6709 TL6711 TL6708 TL6710 TL6713 TL6028 TL6719 TL67 TL6029 TL6718 TL6031 TL6700 TL6701 TL6702 TL6703 TL6704 TL6705 TL6706 TL6018 TL6707 TL6020 TL6019 TL6023 TL6021 R6703 C6711 C6703 R6702 D6703 R6710 C6707...
Page 63 LC-20S1E INVERTER Unit (Side-A) TL6716 TL6712 TL6715 TL6714 TL6717 TL6713 TL6720 TL6030 TL6721 TL6032 TL6722 TL6031 TL6022 TL6027 TL6023 TL6024 TL6026 R6740 TL6025 R6742 C6725 R6748 R6731 R6728 C6727 R6724 C6722 R6730 C6726 D6708 C6729 R6723 R6733 INVERTER Unit (Side-B)
Page 64: Replacement Parts List
LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code PARTS LIST D6702 VHDMA157A//-1Y J Diode D6703 VHDMA157A//-1Y J Diode PARTS REPLACEMENT D6704 VHDDAN202K/-1Y J Diode D6705 VHDDAN202K/-1Y J Diode D6707 VHDMA157A//-1Y J Diode Replacement parts which have these special safety characteristics...
Page 65 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB983WE03 DUNTKB984WE03 INVERTER UNIT (Continued) TUNER UNIT TUNER R6723 VRS-CY1JF824JY J 820k 1/16W Metal Oxide R6724 VRS-CY1JF471JY J 470 1/16W Metal Oxide NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN...
Page 66 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB984WE03 C1917 RC-EZ0417CEZZY J 150 Electrolytic C1918 VCKYCY1HB102KY J 1000p 50V Ceramic TUNER UNIT (Continued) C1919 VCKYCY1EF104ZY J 0.1 Ceramic C1920 VCKYTV1CF105ZY J 1 Ceramic C1921 RC-EZA130WJZZY J 3.3...
Page 67 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB984WE03 C5001 VCCCCY1HH101JY J 100p Ceramic C5002 VCCCCY1HH101JY J 100p Ceramic TUNER UNIT (Continued) C6513 VCKYCY1HB332KY J 3300p 50V Ceramic RESISTORS C3309 RC-EZA128WJZZY J 1 Electrolytic R352 VRS-CY1JF472JY J 4.7k 1/16W Metal Oxide...
Page 68 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB984WE03 R3743 VRS-CY1JF122FY J 1.2k 1/16W Metal Oxide R3744 VRS-CY1JF243FY J 24k 1/16W Metal Oxide TUNER UNIT (Continued) R3745 VRS-CY1JF102JY J 1k 1/16W Metal Oxide R3746 VRS-CY1JF102JY...
Page 69 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB984WE03 DUNTKB985WE03 TUNER UNIT (Continued) R/C, LED UNIT INTEGRATED CIRCUITS F3302 QFS-ZA002WJZZ J Fuse, 1.25A/250V å FH3301 QFSHD1002CEZZ J Fuse Holder IC4201 VHiTPS850++-1Y J TPS850 FH3302 QFSHD1002CEZZ...
Page 70: Main Unit
LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB988FE03 D706 VHDDAN222//-1Y J Diode D707 VHDDAN222//-1Y J Diode MAIN UNIT D708 RH-EX1245CEZZY J Zener Diode, 5.1V D709 VHDDAN222//-1Y J Diode INTEGRATED CIRCUITS D710 VHDDAN202K/-1Y J Diode...
Page 71 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB988FE03 C1112 VCKYCY1HB103KY J 0.01 Ceramic C1113 VCKYCY1HB103KY J 0.01 Ceramic MAIN UNIT (Continued) C1114 VCCCCY1HH560JY J 56p Ceramic C1115 VCKYTV1CB334KY J 0.33 Ceramic C1116 VCKYTV1CB105KY J 1...
Page 72 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB988FE03 R854 VRS-CY1JF102FY J 1k 1/16W Metal Oxide R856 VRS-CY1JF392FY J 3.9k 1/16W Metal Oxide MAIN UNIT (Continued) R1101 VRS-CY1JF273FY J 27k 1/16W Metal Oxide R1102 VRS-CY1JF472FY J 4.7k 1/16W Metal Oxide...
Page 73 LC-20S1E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB988FE03 R2081 VRS-CA1JF101JY J 100 1/16W Metal Oxide R2083 VRS-CY1JF223JY J 22k 1/16W Metal Oxide MAIN UNIT (Continued) R2088 VRS-CY1JF153JY J 15k 1/16W Metal Oxide R2089 VRS-CY1JF101JY...
Page 74: Cabinet And Mechanical Parts
XEBSF40P20000 J Screw, x9 1-1-2 HDECQA269WJSA J R/C, LED Cover RCORFA026WJZZ S Core 1-1-3 PSPAHA040WJZZ J Spacer, x2 TLABSA028WJSA S GOST Label(LC-20S1E(R)) 1-1-4 PSPAHA041WJZZ J Spacer, x1 1-1-5 PSPAHA213WJZZ J Spacer, x1 QCNW-B521WJQZ J Connecting Cord(SP) VSP7040PB608S J Speaker, x2...
Page 75 LC-20S1E CABINET AND MECHANICAL PARTS 1-1-4 4-3-5 1-1-1 1-1-3 4-3-4 1-1-2 1-1-5 4-3-2 4-3-1 4-3-7 4-3-6 4-3-3 1-1-3 4-3-8 R/C,LED PWB 4-3-4 4-2-1 4-2-1 4-2-1 4-10 4-2-1 4-2-1 4-13 4-12 4-11 4-13 3-1-1 3-1-3 3-1-2 Tuner PWB Main PWB Inverter PWB...
Page 76: Packing Parts
PACKING PARTS ACCESSORIES (NOT REPLACEMENT ITEM) LHLDWA002WJSB J Cable Clamp, x1 SPAKCA870WJZZ – Packing Case — å QACCBA016WJPZ J AC Cord(LC-20S1E(K)) SPAKFA310WJZZ – Buffer Material — å QACCKA006WJPZ J AC Cord(LC-20S1E/E(R)) (Accessories) RRMCGA074WJSA J Infrared R/C Unit SPAKPA188WJZZ – Wrapping Paper —...
Page 77: Packing Of The Set
LC-20S1E PACKING OF THE SET Operation Manual (TiNS-A837WJZZ:LC-20S1E/E(K)/E(R)) (TiNS-A838WJZZ:LC-20S1E(R)) Polyethylene Bag Cable Clamp (1pc.) (SSAKAA010WJZZ) (LHLDWA002WJSB) Guarantee Card (TGAN-1688CEN1:LC-20S1E(K)) (TGAN-A077WJZZ:LC-20S1E(R)) Infrared R/C Unit (RRMCGA074WJSA) AC Adapter (UADP-A043WJPZ) AC Cord (QACCBA016WJPZ:LC-20S1E(K)) Buffer Material (Accessories) (QACCKA006WJPZ:LC-20S1E/E(R)) (SPAKFA310WJZZ) "AAA" size Battery (2pcs.) Wrapping Paper...
Page 78 LC-20S1E COPYRIGHT © 2003 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.

Sharp LC-20S1E Service Manual

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