Sharp 20GT-15 Service Manual
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Sharp 20GT-15 Service Manual

Sharp 20GT-15 Service Manual

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• FEATURES ...................................................................................................................................................... 2
• SPECIFICATIONS ........................................................................................................................................... 2
• IMPORTANT SERVICE NOTES ...................................................................................................................... 3
• ADJUSTMENT PRECAUTION ......................................................................................................................... 3
• UA1 HOTEL MODE APPLICATION ................................................................................................................. 4
• SERVICE MODE .............................................................................................................................................. 4
• TROUBLE SHOOTING TABLE ...................................................................................................................... 18
• SOLID STATE DEVICE BASE DIAGRAM ..................................................................................................... 20
• CHASSIS LAYOUT ........................................................................................................................................ 21
• BLOCK DIAGRAM ......................................................................................................................................... 22
• WAVEFORMS ................................................................................................................................................ 25
• SCHEMATIC DIAGRAM
• DESCRIPTION OF SCHEMATIC DIAGRAM ................................................................................................. 26
INFRARED REMOTE CONTROL UNIT .................................................................................................... 27
TUNER ...................................................................................................................................................... 28
CRT UNIT .................................................................................................................................................. 29
MAIN UNIT ................................................................................................................................................ 30
• PRINTED WIRING BOARD ASSEMBLIES .................................................................................................... 32
ELECTRICAL PARTS ................................................................................................................................ 37
SUPPLIED ACCESSORIES ...................................................................................................................... 41
PACKING PARTS ...................................................................................................................................... 41
CABINET PARTS ...................................................................................................................................... 41
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
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
WARNING
SHARP CORPORATION
1
COLOUR TELEVISION
Chassis No. UA-1
20GT-15
20GT-15
20GT-15
S30X520GT-15/
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  • Page 1: Table Of Contents

    20GT-15 20GT-15 SERVICE MANUAL S30X520GT-15/ COLOUR TELEVISION Chassis No. UA-1 20GT-15 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.
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  • Page 14 20GT-15 MEMORY MAP TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING MODEL : ISSUED DATE : ISSUED DATE : ISSUED DATE : MANAGER MANAGER MANAGER PROCESS EEPROM CHECK DATA LIST 1 CHIEF CHIEF CHIEF ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 15 20GT-15 MEMORY MAP (Continued) TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING MODEL : ISSUED DATE : ISSUED DATE : ISSUED DATE : PROCESS MANAGER MANAGER MANAGER EEPROM CHECK DATA LIST 2 CHIEF CHIEF CHIEF ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 16 20GT-15 MEMORY MAP (Continued) TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING MODEL : ISSUED DATE : ISSUED DATE : ISSUED DATE : MANAGER MANAGER MANAGER PROCESS EEPROM CHECK DATA LIST 3 CHIEF CHIEF CHIEF ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 17 20GT-15 MEMORY MAP (Continued) TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING MODEL : ISSUED DATE : ISSUED DATE : ISSUED DATE : PROCESS MANAGER MANAGER MANAGER EEPROM CHECK DATA LIST 4 CHIEF CHIEF CHIEF ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 18 20GT-15 MEMORY MAP (Continued) MODEL : TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING ISSUED DATE : ISSUED DATE : ISSUED DATE : PROCESS MANAGER MANAGER MANAGER CHIEF CHIEF CHIEF EEPROM CHECK DATA LIST 5 ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 19 20GT-15 MEMORY MAP (Continued) MODEL : TV MICOM ENGINEERING TV DESIGN ENGINEERING TV PRODUCTION ENGINEERING ISSUED DATE : ISSUED DATE : ISSUED DATE : PROCESS MANAGER MANAGER MANAGER CHIEF CHIEF CHIEF EEPROM CHECK DATA LIST 6 ENGINEER ENGINEER ENGINEER SLAVE ADDRESS : A0 (00~FF) A2 (100~1FF)
  • Page 20 20GT-15...
  • Page 21 20GT-15...

  • Page 22: Solid State Device Base Diagram

    20GT-15 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW COLLECTOR COLLECTOR :BR: BASE EMITTER BASE EMITTER M24C04W B709AR FX0008GE D601A COLLECTOR BASE EMITTER ix3311CEN1/ 2SC2735 ix3368CEN0 SIDE VIEW BASE 1 2 3 COLLECTOR BASE EMITTER COLLECTOR SE115N EMITTER 2SA1015 PST573J DX0386CE...

  • Page 23: Chassis Layout

    20GT-15 CHASSIS LAYOUT...

  • Page 24: Block Diagram

    20GT-15 20GT-15 BLOCK DIAGRAM MAIN UNIT BLOCK DIAGRAM 22~23...
  • Page 25 20GT-15 CRT BLOCK DIAGRAM...

  • Page 26: Waveforms

    20GT-15 WAVEFORMS...

  • Page 27: Description Of Schematic Diagram

    20GT-15 DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: NOTES: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE 1. The unit of resistance “ohm” is omitted. REPLACING PARTS. (K = 1000 ohms, M = Meg ohm). 2. All resistors are 1/16 watt, unless otherwise noted.

  • Page 28: Schematic Diagram

    20GT-15 SCHEMATIC DIAGRAM Infrared Remote Control Unit NOTE: The parts here shown are supplied as an assembly but not independently.

  • Page 29: Tuner

    20GT-15 Tuner å VTUVTST5HD84/ NOTE: The parts here shown are supplied as an assembly but not independently.

  • Page 30: Crt Unit

    20GT-15 CRT UNIT...

  • Page 31: Main Unit

    20GT-15 20GT-15 MAIN UNIT 30~31...

  • Page 32: Printed Wiring Board Assemblies

    20GT-15 20GT-15 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN UNIT (WIRING SIDE) 32~33...
  • Page 33 20GT-15 20GT-15 PWB-A: MAIN UNIT (WIRING SIDE) (CHIP PARTS) 34~35...
  • Page 34 20GT-15 PWB-B: CRT UNIT...

  • Page 35: Replacement Parts List

    20GT-15 Ref. No. Part No. Description Code Ref. No. Part No. Description Code Q203 VS2SD601AR/-1 R 2SD601AR REPLACEMENT PARTS LIST Q205 VS2SC1815GW-1 R 2SC1815GW Q301 VS2SD601AR/-1 R 2SD601AR PARTS REPLACEMENT Q302 VS2SD601AR/-1 R 2SD601AR Q305 VS2SD601AR/-1 R 2SD601AR Q601 VS2SC2482//-1...
  • Page 36 20GT-15 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKAGED CIRCUIT C512 VCKYCY1HB102K R 1000p 50V Ceramic C513 VCKYCY1HB102K R 1000p 50V Ceramic PR701 RMPTP0001PEZZ R Packaged Circuit C514 VCKYPA1HF103Z R 0.01 50V Ceramic C515 VCKYPA2HB102K R 1000p 500V Ceramic...
  • Page 37 20GT-15 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C813 VCFYFA1HA224J R 0.22 R205 VRD-RA2BE680J R 68 1/8W Carbon MetalIzed Polypro Film R206 VRS-CY1JF122J R 1.2k 1/16W Metal Oxide C814 VCKYCY1HB471K R 470p 50V Ceramic R207...
  • Page 38 20GT-15 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R630 VRS-CY1JF100J R 10 1/16W Metal Oxide BALUNES R631 VRS-CY1JF391J R 390 1/16W Metal Oxide FB306 RBLN-0037CEZZ R Balun, BLN-0037CE R632 VRS-CY1JF273J R 27k 1/16W Metal Oxide...

  • Page 39: Supplied Accessories

    - Packing Add. — SPAKX0068KJZZ - Packing Add. — SSAKA0230CEZZ - Polyethylene Bag — CABINET PARTS CCABA0083WEA0 Front Cabinet HBDGB0001KJSA R SHARP Badge HDECQ0038KJSA LED R/C Cover HDECQ0039KJSA AV Cover JBTN-0042KJSA Power Button JBTN-0043KJSA Control Button MSPRC0003KJFW Power Button Spring CCABB0053WEA0 Rear Ass’y Cabinet...
  • Page 40 Code Ref. No. Part No. Description Code COPYRIGHT C 2000 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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