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Sharp LC-20A2E Service Manual

Sharp lcd colour television service manual
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Download this manual See also: Operating Manual
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 3
» OPERATION MANUAL ......................................................................................................................... 4
» OUTLINE DIMENSION FIGURE .......................................................................................................... 5
» REMOVING OF MAJOR PARTS .......................................................................................................... 6
» ADJUSTING PROCEDURE OF EACH SECTION ............................................................................... 9
» TROUBLE SHOOTING TABLE ........................................................................................................... 11
» CHASSIS LAYOUT ............................................................................................................................. 17
» BLOCK DIAGRAMS ............................................................................................................................ 20
» DESCRIPTION OF SCHEMATIC DIAGRAM ..................................................................................... 24
» SCHEMATIC DIAGRAMS ................................................................................................................... 25
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 42
Ë ELECTRICAL PARTS ..................................................................................................................... 47
MAIN UNIT ..................................................................................................................................... 47
SUB UNIT ....................................................................................................................................... 50
INVERTER UNIT ............................................................................................................................ 52
SWITCH UNIT ................................................................................................................................ 52
Ë SUPPLIED ACCESSORIES PARTS .............................................................................................. 53
Ë PACKING PARTS ........................................................................................................................... 53
Ë CABINET PARTS LIST ................................................................................................................... 53
Ë CABINET AND MECHANICAL PARTS .......................................................................................... 54
» PACKING OF THE SET ...................................................................................................................... 55

SERVICE MANUAL

LCD COLOUR TELEVISION
MODEL
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS

SHARP CORPORATION

S11O1LC-20A2E
LC-20A2E
Page
LC-20A2E

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Summary of Contents for Sharp LC-20A2E

  • Page 1: Table Of Contents

    LC-20A2E SERVICE MANUAL S11O1LC-20A2E LCD COLOUR TELEVISION LC-20A2E MODEL In the interests of user-safety (Required by safety regula- tions in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

  • Page 2: Adjusting Procedure Of Each Section

    LC-20A2E ADJUSTING PROCEDURE OF EACH SECTION [1] Entering the MAIN side adjustment process mode There are three methods below. 1) Press the “Adjustment process key” on the remote control after turning on the power. 2) Pressing both the MENU key and the TV/VIDEO key on the main body, turn on the power. Then, press the volume DOWN key and the tuning UP key at the same time.
  • Page 3 LC-20A2E PAL/PAL60 SECAM NTSC y delay tint offset sub contrast sub colour y delay AV1/ tint offset sub contrast sub colour y delay tint offset sub contrast sub colour AGC gain start 3-1. +B adjustment Page 9 of MAIN side adjustment process +B-ADJ Adjust the voltage of the pin 12 of SC901 the SUB PWB to 5.0V±0.05V.

  • Page 4: Trouble Shooting Table

    LC-20A2E TROUBLE SHOOTING TABLE...
  • Page 5 LC-20A2E TROUBLE SHOOTING TABLE (Continued)
  • Page 6 LC-20A2E TROUBLE SHOOTING TABLE (Continued)
  • Page 7 LC-20A2E TROUBLE SHOOTING TABLE (Continued)
  • Page 8 LC-20A2E TROUBLE SHOOTING TABLE (Continued)

  • Page 9: Block Diagrams

    LC-20A2E LC-20A2E BLOCK DIAGRAMS Ë MAIN BLOCK DIAGRAM DACA_L/R HEAD PHONE AUDIO P2003 OUTPUT AMPLIFER DACA_L/R IC304 FLSP SC2001 SC2 OUT L/R FRSP DACM_L/R AUDIO OUTPUT FRONT SPEAKER IC901 IC903 AMPLIFER REVERSE IC303 IC3305 BUFFER TUNER IC902 PA VCC TV/AV...
  • Page 10 LC-20A2E LC-20A2E Ë TUNER BLOCK DIAGRAM HEAD PHONE SOUND(L/R) DACA_L/R HEAD PHONE HEAD PHONE AMP HEAD PHONE JACK OUTPUT Q18~Q23 SOUND(L/R) SC2 OUT L/R MSP OUTPUT OUTPUT TUNER AN IN1 MSP TUNER W7, W14 V IN2 VPC INPUT INPUT AV1 SOUND(L/R)

  • Page 11: Schematic Diagrams

    LC-20A2E SCHEMATIC DIAGRAMS Ë INVERTER Unit å AND SHADED COMPONENTS=SAFETY RELATED PARTS...
  • Page 12 LC-20A2E LC-20A2E Ë MAIN Unit -1/4 26~27...
  • Page 13 LC-20A2E LC-20A2E Ë MAIN Unit -2/4 28~29...
  • Page 14 LC-20A2E LC-20A2E Ë MAIN Unit -3/4 30~31...
  • Page 15 LC-20A2E LC-20A2E Ë MAIN Unit -4/4 32~33...
  • Page 16 LC-20A2E LC-20A2E Ë SUB Unit -1/2 34~35...
  • Page 17 LC-20A2E LC-20A2E Ë SUB Unit -2/2 å AND SHADED COMPONENTS=SAFETY RELATED PARTS 36~37...
  • Page 18 LC-20A2E LC-20A2E Ë SWITCH Unit 38~39...
  • Page 19 LC-20A2E LC-20A2E Ë TUNER Unit å AND SHADED COMPONENTS=SAFETY RELATED PARTS 40~41...

  • Page 20: Printed Wiring Board Assemblies

    LC-20A2E PARTS LIST Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA431DE01 PARTS REPLACEMENT MAIN PWB UNIT Replacement parts which have these special safety character- INTEGRATED CIRCUITS istics identified in this manual: electrical components having IC401...
  • Page 21 LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA431DE01 C1114 VCKYCY1EF104Z J 0.1 25V Ceramic MAIN PWB UNIT(Continued) C1115 VCKYCY1EF104Z J 0.1 25V Ceramic C1116 VCKYCY1EF104Z J 0.1 25V Ceramic L1204 VP-1M220J2R9N J Peaking, 22µH...
  • Page 22 LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA431DE01 R1210 VRS-CY1JF220J J 22 1/16W Metal Oxide AA MAIN PWB UNIT(Continued) R1211 VRS-CY1JF221J J 220 1/16W Metal Oxide AA R1212 VRS-CY1JF000J 1/16W Metal Oxide AA R790...
  • Page 23 LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA431DE01 C203 RC-KZ1025CEZZ 10V Ceramic MAIN PWB UNIT(Continued) C204 RC-KZ1025CEZZ 10V Ceramic C205 VCKYCY1EF104Z J 0.1 25V Ceramic MISCELLANEOUS PARTS C206 VCKYCY1HF103Z J 0.01 50V Ceramic C334...
  • Page 24 LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA432DE01 R732 VRS-TW2ED222J J 2.2k 1/4W Metal Oxide AA SUB PWB UNIT(Continued) R733 VRS-TQ2BD683J J 68k 1/8W Metal Oxide AA R734 VRS-CY1JF393J J 39k 1/16W Metal Oxide AA C958 VCEAPF1EW475M J 4.7...

  • Page 25: Inverter Unit

    LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA432DE01 D4008 RH-EX0891CEZZ J Zener Diode SUB PWB UNIT(Continued) D4009 RH-EX0879CEZZ J Zener Diode D4010 RH-EX0879CEZZ J Zener Diode P903 QPLGN0278GEZZ J Plug, 2Pin D4012 RH-EX0879CEZZ J Zener Diode...

  • Page 26: Ë Packing Parts

    LC-20A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code å 6 KLMP-0113CEZZ J Lamp, Lower SUPPLIED ACCESSORIES LANGQ9206CEFW J Fixing Angle, x4 PGiDM0058CEZZ J Lamp Guide Plate LHLDW1028GEZZ J Cable Clamp PSHEP0179CEZZ J Diffusion Sheet, x2 å...

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