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Sharp 21R2BK Service Manual
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Sharp 21R2BK Service Manual

Sharp 21R2BK Service Manual

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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.
Ë Multi 18 systems
Ë Full Auto Channel Preset and Auto Channel Skip
Ë 100-CH Program Memory
Ë CATV(Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
Ë AVL(Sound Keeper) Function
Ë High Contrast Picture(Black Stretch Circuit)
Ë On Timer/Sleep Timer/Reminder Timer
Ë Blue Back Noise Mute
» SPECIFICATIONS ............................................. 2
» IMPORTANT SERVICE NOTES ........................ 2
» ADJUSTMENT PRECAUTIONS ........................ 3
» MEMORY MAP ................................................ 12
» GA1 HOTEL MODE APPLICATION ................ 16
» CHASSIS LAYOUT .......................................... 19
» BLOCK DIAGRAM ........................................... 20
» WAVEFORMS .................................................. 24
Ë CRT UNIT ..................................................... 25
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
MODEL
FEATURES
Ë Front AV-In & Rear AV-In/Out Terminals
Ë Colour Comb Filter(NTSC only)
Ë Headphone Terminal
Ë Hotel Mode
Ë Arabic/Chinese/English/French/Malay/
Ë White Temperature Adjustment
CONTENTS
Page
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. GA-1
21R2BK
(Front Priority)
5 Languages OSD
Ë HEADPHONE JACK UNIT ........................... 25
Ë MAIN UNIT ................................................... 26
Ë ELECTRICAL PARTS
MAIN UNIT ................................................... 33
CRT UNIT ..................................................... 36
HEADPHONE JACK UNIT ........................... 37
Ë SUPPLIED ACCESSORIES ......................... 37
Ë PACKING PARTS ......................................... 37
Ë CABINET PARTS ......................................... 38
» PACKING OF THE SET ................................... 39
21R2BK
S03J21R2BK//
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Summary of Contents for Sharp 21R2BK

  • Page 1: Table Of Contents

    21R2BK SERVICE MANUAL S03J21R2BK// COLOUR TELEVISION Chassis No. GA-1 21R2BK 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: Specifications

    21R2BK...

  • Page 3: Adjustment Precautions

    21R2BK...
  • Page 4 21R2BK...
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  • Page 8 21R2BK...
  • Page 9 21R2BK...
  • Page 10 21R2BK...
  • Page 11 21R2BK...

  • Page 12: Memory Map

    21R2BK...
  • Page 13 21R2BK...
  • Page 14 21R2BK...
  • Page 15 21R2BK...

  • Page 16: Ga1 Hotel Mode Application

    21R2BK...
  • Page 17 21R2BK...
  • Page 18 21R2BK...

  • Page 19: Chassis Layout

    21R2BK CHASSIS LAYOUT...

  • Page 20: Block Diagram

    21R2BK BLOCK DIAGRAM:MAIN UNIT...
  • Page 21 21R2BK...
  • Page 22 21R2BK BLOCK DIAGRAM:CRT UNIT BLOCK DIAGRAM:HEADPHONE JACK UNIT...

  • Page 23: Solid State Device Base Diagram

    21R2BK SOLID STATE DEVICE BASE DIAGRAM TOP VIEW COLLECTOR COLLECTOR BASE EMITTER BASE EMITTER CAT24W04 C2735 A1530AR C3928AR IX3368CE SIDE VIEW BASE COLLECTOR BASE EMITTER COLLECTOR EMITTER TX0110BM TX0124BM DX0476CE 2PC1815   2SC3207 CATHODE ANODE (RED) 1 2 3 AN7523...

  • Page 24: Description Of Schematic Diagram

    21R2BK DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: NOTES: 1. The unit of resistance "ohm" is omitted. 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. (K = 1000 ohms, M = Mega ohm). 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS 2.

  • Page 25: Schematic Diagramë Crt Unit

    21R2BK SCHEMATIC DIAGRAM:CRT UNIT SCHEMATIC DIAGRAM:HEADPHONE JACK UNIT...

  • Page 26: Ë Main Unit

    21R2BK SCHEMATIC DIAGRAM:MAIN...
  • Page 27 21R2BK...

  • Page 28: Printed Wiring Board Assemblies

    21R2BK PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN UNIT (Wiring Side)
  • Page 29 21R2BK...
  • Page 30 21R2BK PWB-A: MAIN UNIT (Chip Parts Side)
  • Page 31 21R2BK...
  • Page 32 21R2BK PWB-B: CRT UNIT (Wiring Side) PWB-B: CRT UNIT (Chip Parts Side) PWB-C: HEADPHONE UNIT (Wiring Side) RJ 6 2 R3 7 0 PWB-C: HEADPHONE UNIT (Chip Parts Side)

  • Page 33: Replacement Parts List

    21R2BK REPLACEMENT PARTS LIST Ref. No. Part No. Description Code Ref. No. Part No. Description Code PARTS REPLACEMENT DUNTKA541WEK0 PWB-A MAIN UNIT Replacement parts which have these special safety characteristics TUNER are identified in this manual; electrical components having such NOTE:THE PARTS HERES SHOWN ARE SUPPLIED AS features are identified by "å"...
  • Page 34 21R2BK Ref. No. Part No. Description Code Ref. No. Part No. Description Code D1004 VHD1SS119//-1Y R 1SS119 C509 VCEA0A1CW477M+R 470 16V Electrolytic C510 VCKYPA2HB102K+ R 1000p 500V Ceramic D1007 RH-EX0263TAZZY R Zener Diode C514 VCFYSA1JB473J+ R 0.047 63V Mylar D1012 RH-EX0611GEZZY R Zener Diode, 5.1V...
  • Page 35 21R2BK Ref. No. Part No. Description Code Ref. No. Part No. Description Code C1012 VCKYCY1CF474Z R 0.47 16V Ceramic R314 VRN-MD2AL472J R 4.7k 0.1W Metal Film C1013 VCEA0A0JW107M+ R 100 6.3V Electrolytic R315 VRN-MD2AL272J R 2.7k 0.1W Metal Film C1014...

  • Page 36: Crt Unit

    21R2BK Ref. No. Part No. Description Code Ref. No. Part No. Description Code å R751 J409 QJAKHA004WJZZ R Jack, AV-1 IN VRC-UA2HG825KY R 8.2M 1/2W Solid å R752 VRC-UA2HG825KY R 8.2M 1/2W Solid P302 QPLGNA109WJZZ R Plug, 4Pin (S) R753...

  • Page 37: Headphone Jack Unit

    21R2BK Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA543WEB2 MISCELLANEOUS PARTS PWB-C HEADPHONE UNIT SP301 VSP9050PB35WA R Speaker (R) RESISTORS SP302 VSP9050PB35WA R Speaker (L) RJ60 VRN-MD2AL000J 0.1W Metal Film QCNW-A230WJZZ R Connecting Cord RJ61 VRN-MD2AL000J 0.1W Metal Film...

  • Page 38: Ë Cabinet Parts

    Part No. Description Code CABINET PARTS CCABAA390WEV0 R Front Cabinet Ass'y Not Available – Front Cabinet – HBDGB0015PESB R SHARP Badge GCOVAA533WJSA R RC/LED Cover JBTN-A196WJSA R Control Button JBTN-A197WJSA R Power Button MSPRCA040WJFW R Power Button Spring PSPAHA287WJ00 R...

  • Page 39: Packing Of The Set

    21R2BK PACKING OF THE SET...
  • Page 40 Code Ref. No. Part No. Description Code 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.

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