Sharp LC-15B2EA Service Manual
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Sharp LC-15B2EA Service Manual

Sharp LC-15B2EA Service Manual

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Download this manual See also: Operating Manual
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.
PRECAUTION.................................................... 2
» SPECIFICATIONS ............................................. 3
» OPERATION MANUAL ...................................... 4
» DIMENSIONS .................................................... 5
» REMOVING OF MAJOR PARTS ....................... 6
EACH SECTION ................................................ 9
» TROUBLE SHOOTING TABLE ........................ 12
» CHASSIS LAYOUT .......................................... 18
» BLOCK DIAGRAM ........................................... 20
» OVERALL WIRING DIAGRAM ........................ 22
Ë RC/LED and OPERATION UNIT ............... 25
SERVICE MANUAL
LCD COLOUR TELEVISION
MODEL
CONTENTS
Page
» PACKING OF THE SET ................................... 63
SHARP CORPORATION
LC-15B2EA
Ë MAIN UNIT ................................................ 26
Ë TUNER UNIT ............................................. 38
Ë INVERTER UNIT ....................................... 46
Ë ELECTRICAL PARTS ................................ 51
Ë MAIN UNIT ................................................ 51
Ë TUNER UNIT ............................................. 55
Ë INVERTER UNIT ....................................... 59
Ë RC/LED UNIT ............................................ 60
Ë OPERATION UNIT ..................................... 60
Ë CABINET AND MECHANICAL PARTS ..... 60
Ë ACCESSORIES PARTS ............................ 62
Ë PACKING PARTS ....................................... 62
LC-15B2EA
S42H2LC15B2EA
Page

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Summary of Contents for Sharp LC-15B2EA

  • Page 1: Table Of Contents

    LC-15B2EA SERVICE MANUAL S42H2LC15B2EA LCD COLOUR TELEVISION LC-15B2EA MODEL 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-15B2EA IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be perfomed 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: Specifications

    LC-15B2EA Specifications Items 15" LCD COLOUR TV, Model: LC-15B2EA LCD panel 15" Advanced Super View & BLACK TFT LCD Number of dots 921,600 dots Video colour system PAL/SECAM/NTSC TV-Standard (CCIR) B/G, I, D/K, L Function TV-Tuning System Auto preset 200 ch.

  • Page 4: Operation Manual

    LC-15B2EA Operation Manual Main unit (front view) Terminals Upper control panel Volume (+)/(–) CH ( )/( ) MENU Antenna TV/VIDEO (MAIN POWER) MENU TV/VIDEO O U T AUDIO OUT (L) A U D IO AUDIO OUT (R) Speaker Headphones Speaker...

  • Page 5: Dimensions

    LC-15B2EA Dimensions MENU TV/VIDEO 305.3 301.6 98.8 61.1 AV-IN 1 AV-IN 2 S-VIDEO VIDEO AUDIO OUT AUDIO POWER INPUT DC12V 149.5 48.5 (Unit: mm)

  • Page 6: Removing Of Major Parts

    LC-15B2EA REMOVING OF MAJOR PARTS 1. Remove the back cover. 2. Remove the table stand fixing screws (4 pcs.). 3. Remove the Rear cabinet fixing screws (9 pcs.) and detach the cabinet. 4. Peel off the tape. 5. Detach the connector from each PWB.
  • Page 7 LC-15B2EA 6. Remove the MAIN PWB fixing screws (3 pcs.). 7. Remove the INVERTER PWB fixing screws (2 pcs.). 8. Remove the 21-pin terminal fixing screw (2 pcs.). 9. Detach the chassis frame cover. 10. Remove the TUNER PWB fixing screws (4 pcs.).
  • Page 8 LC-15B2EA » 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 9: Adjusting Procedure Of Each Section

    LC-15B2EA 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.
  • Page 10 LC-15B2EA 4. Initialization When the microprocessor (IC2001) or the EEPROM (IC2004) 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 11 LC-15B2EA 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 12: Trouble Shooting Table

    LC-15B2EA TROUBLE SHOOTING TABLE...
  • Page 13 LC-15B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 14 LC-15B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 15 LC-15B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 16 LC-15B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 17 LC-15B2EA TROUBLE SHOOTING TABLE (Continued)

  • Page 18: Chassis Layout

    LC-15B2EA CHASSIS LAYOUT INVERTER PWB OPERATION PWB MAIN PWB TUNER PWB RC/LED PWB...

  • Page 19: Block Diagram

    LC-15B2EA BLOCK DIAGRAM TUNER ANTENNA ANA_IN1+/2+ AUDIO ACTIVE FILTER SPEAKER L/R_IN AUDIO SIF1/2 POWER AMP DACM_L/R IC1903 FLSP/FRSP P3301 AI_L/R SC2_IN_L/R IC3305 P3302 AUDIO AMP SC1_OUT_L/R SC3903 SCART AUDIO AMP IC1901 DACA_L/R (AV1) J5003 IC1902 IC304 HEADPHONE SC1_IN_L/R HL/R SC_L/R...

  • Page 20: Overall Wiring Diagram

    LC-15B2EA OVERALL WIRING DIAGRAM...

  • Page 21: Description Of Schematic Diagram

    LC-15B2EA DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: CAUTION: 1. Voltages at test points are measured at the This circuit diagram is original one, therefore there may be a supply voltage of AC 120V. Signals are fed by a slight difference from yours.

  • Page 22: Schematic Diagramë Rc/Led And Operation Unit

    LC-15B2EA SCHEMATIC DIAGRAM Ë RC/LED and OPERATION Unit...

  • Page 23: Ë Main Unit

    LC-15B2EA Ë MAIN Unit-1/6...
  • Page 24 LC-15B2EA Ë MAIN Unit-2/6...
  • Page 25 LC-15B2EA Ë MAIN Unit-3/6...
  • Page 26 LC-15B2EA Ë MAIN Unit-4/6...
  • Page 27 LC-15B2EA Ë MAIN Unit-5/6...
  • Page 28 LC-15B2EA Ë MAIN Unit-6/6...

  • Page 29: Ë Tuner Unit

    LC-15B2EA Ë TUNER Unit-1/4...
  • Page 30 LC-15B2EA Ë TUNER Unit-2/4...
  • Page 31 LC-15B2EA Ë TUNER Unit-3/4...
  • Page 32 LC-15B2EA Ë TUNER Unit-4/4...

  • Page 33: Ë Inverter Unit

    LC-15B2EA Ë INVERTER Unit...

  • Page 34: Printed Wiring Board Assemblies

    LC-15B2EA PRINTED WIRING BOARD ASSEMBLIES RC/LED Unit (Component Side) OPERATION Unit (Component Side) INVERTER Unit (Component Side)
  • Page 35 LC-15B2EA MAIN Unit (Side-A)
  • Page 36 LC-15B2EA MAIN Unit (Side-B)
  • Page 37 LC-15B2EA TUNER Unit (Component Side)

  • Page 38: Parts List

    LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code IC1116 VHiNJM2147M-1 J NJM2147M-TE1 PARTS LIST IC1201 RH-iX3378CEN1Q J LR38815 IC1202 VHiPD485505-2 J UPD485505G-25 IC1203 RH-iX1518CEZZ J TC74HC157AF PARTS REPLACEMENT IC1206 VHiLVX125FT-1 J TC74LVX125FT IC1207 VHiTC4W66U/-1 J TC4W66FU...
  • Page 39 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE55 C837 RC-KZ1025CEZZ J 1.0 Ceramic C838 VCEAPF0GW107M J 100 4.0V Electrolytic MAIN UNIT (Continued) C839 RC-KZ1025CEZZ J 1.0 Ceramic C840 VCKYTV1CF684Z J 0.68 Ceramic D3708 VHDDAN222//-1...
  • Page 40 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE55 R409 VRS-CY1JF103J J 10k 1/16W Metal Oxide R410 VRS-CY1JF474J J 470k 1/16W Metal Oxide MAIN UNIT (Continued) R414 VRS-CY1JF105J J 1M 1/16W Metal Oxide R415 VRS-CY1JF105J...
  • Page 41 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE55 R1186 VRS-CY1JF102J J 1.0k 1/16W Metal Oxide R1187 VRS-CY1JF102J J 1.0k 1/16W Metal Oxide MAIN UNIT (Continued) R1188 VRS-CY1JF102J J 1.0k 1/16W Metal Oxide R1190 VRS-CY1JF000J...
  • Page 42 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE55 R7023 VRS-CB1JF000J 1/16W Metal Oxide R7024 VRS-CA1JF000J 1/16W Metal Oxide MAIN UNIT (Continued) MISCELLANEOUS PARTS R2031 VRS-CY1JF000J 1/16W Metal Oxide FB801 RBLN-0090CEZZ J Ferrite Bead R2032 VRS-CY1JF000J...
  • Page 43 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE02 C342 VCEAPF1CW476M J 47 Electrolytic C343 VCEAPF1HW225M J 2.2 Electrolytic TUNER UNIT C344 VCEAPF1CW106M J 10 Electrolytic C1601 VCEAPF0JW107M J 100 6.3V Electrolytic Q2202 VS2SC3928AR-1 J 2SC3928AR C1602 VCKYCY1EF104Z J 0.1...
  • Page 44 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE02 C3363 VCEAPF1HW225M J 2.2 Electrolytic C3364 VCEAPF1HW105M J 1.0 Electrolytic TUNER UNIT (Continued) C3365 VCKYCY1HB102K J 1000p 50V Ceramic C3366 VCEAPF1HW225M J 2.2 Electrolytic C1914 RC-KZ1025CEZZ J 1.0...
  • Page 45 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE02 R1944 VRS-CY1JF471J J 470 1/16W Metal Oxide R1945 VRS-CY1JF471J J 470 1/16W Metal Oxide TUNER UNIT (Continued) R1946 VRS-CY1JF102J J 1.0k 1/16W Metal Oxide R1947 VRS-CY1JF392J J 3.9k 1/16W Metal Oxide...
  • Page 46 LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE02 P3301 QPLGN0174FJZZ J Plug, 2-pin(SL) P3302 QPLGN0174FJZZ J Plug, 2-pin(SR) TUNER UNIT (Continued) P3601 QPLGN0478GEZZ J Plug, 4-pin P3603 QPLGN0378GEZZ J Plug, 3-pin(VE) R3511 VRS-CY1JF473J J 47k 1/16W Metal Oxide...

  • Page 47: Ë Operation Unit

    LC-15B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB155DE02 CABINET PARTS LOCATION RC/LED UNIT CCABA2473CE01 J Front Cabinet Ass’y TRANSISTORS Not Available – Front Cabinet — Q4001 VSDTC144EE/-1 J DTC144EE GCOVA2020CEZZ J RC/LED Cover Q4003 VSDTC144EE/-1...

  • Page 48: Packing Parts

    Code CABINET PARTS LOCATION ACCESSORIES (Continued) LHLDW0109CESA J Cable Clamp, x2 LANGK0782CEFW J 21-pin Terminal Angle QACCK0006TAZZ J AC Cord (LC-15B2EA) å QCNW-A300WJZZ J Connecting Cord(MT) QACCB0016TAZZ J AC Cord (LC-15B2EA(K)) å QCNW-A302WJZZ J Connecting Cord(MB) RRMCGA031WJSA J Infrared RC Unit...

  • Page 49: Cabinet And Mechanical Parts

    LC-15B2EA CABINET AND MECHANICAL PARTS MAIN PWB INVERTER PWB 1-11 OPERATION PWB TUNER PWB 1-11 1-10 5-11 5-10 RC/LED PWB 5-16 5-12 5-13 5-14 3-11 3-16 3-14 3-17 3-12 3-14 5-15 3-15 3-13 3-16 3-15 3-16 3-16 3-10...

  • Page 50: Packing Of The Set

    PACKING OF THE SET Packing Material (SPAKF0575CEZZ) Operation Manual (TiNS-7629CEZZ) Cable Clamp (2 pcs.) (LHLDW0109CEZZ) Dry Battery (2 pcs.) AC Adapter Guarantee Card (LC-15B2EA(K)) (UADP-0240CEPZ) (TGAN-1688CEN1) AC Cord (LC-15B2EA) (QACCK0006TAZZ) AC Cord (LC-15B2EA(K)) (QACCB0016TAZZ) Wireless Remote Control (RRMCGA031WJSA) Buffer Material (Top)
  • Page 51 LC-15B2EA 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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