Sharp 20F630 Service Manual
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Sharp 20F630 Service Manual

Sharp 20F630 Service Manual

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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.
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 6
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 7
» SERVICE MODE ................................................................................................................................... 8
» ADJUSTMENT METHOD ................................................................................................................... 13
» CHASSIS LAYOUT ............................................................................................................................. 28
» BLOCK DIAGRAM .............................................................................................................................. 30
» DESCRIPTION OF SCHEMATIC DIAGRAM ...................................................................................... 40
» WAVEFORMS ..................................................................................................................................... 41
» SCHEMATIC DIAGRAMS ................................................................................................................... 42
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 52
» REPLACEMENT PARTS LIST ............................................................................................................ 55
» PACKING OF THE SET ...................................................................................................................... 62
POWER INPUT ..................................................... AC 120 V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ................................................................................. Uni-Bi
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency ...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
AUDIO POWER
OUTPUT RATING ........................................ 2.5 W(RMS) x 2pcs

SHARP CORPORATION

1st Edition

SERVICE MANUAL

MODELS
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ................................................................... 5 x 12 cm, 2pcs
2
(192sq inch)
VOICE COIL IMPEDANCE ............................ 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ..................................................... 75 ohm Unbalanced
TUNING RANGES
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
(Nominal)
Specifications are subject to change without
prior notice.
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
COLOR TELEVISION
Chassis No. GA-2
20F630
CU20F630
(EIA, Channel Plan U.S.A.)
20F630
CU20F630
S52J320U-FS1/
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  • Page 1: Table Of Contents

    20F630 1st Edition CU20F630 SERVICE MANUAL S52J320U-FS1/ COLOR TELEVISION Chassis No. GA-2 20F630 CU20F630 MODELS 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

    20F630 CU20F630 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: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit 1.

  • Page 3: Safety Notice

    20F630 CU20F630 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal BEFORE RETURNING THE RECEIVER parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop...
  • Page 4 20F630 CU20F630 PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ë Ë Ë Ë Ë Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT LIMITES DES RADIATIONS X ET DE LA HAUTE TENSION 1.
  • Page 5 20F630 CU20F630 PRECAUTIONS A PRENDRE LORS DE LA REPARATION (Suite) » Toucher avec la sonde d'essai les pièces métalliques VERIFICATIONS CONTRE L'INCEN-DIE ET exposées qui présentent une voie de retour au LE CHOC ELECTRIQUE châssis (antenne, coffret métallique, tête des vis, Avant de rendre le récepteur à...

  • Page 6: Location Of User's Control

    20F630 CU20F630 LOCATION OF USER'S CONTROL Front Panel POWER VIDEO IN 2 L-AUDIO-R Press → On. Press again → Off. SENSOR AREA FOR (INSIDE DOOR) REMOTE CONTROL MENU Press → Accesses MAIN MENU. Press again → Exits MAIN MENU. VOLUME UP/DOWN CHANNEL UP/DOWN (+) Increases sound.

  • Page 7: Installation And Service Instructions

    20F630 CU20F630 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. HIGH VOLTAGE CHECK CIRCUIT PROTECTION The receiver is protected by a 4.0A fuse (F701),...

  • Page 8: Service Mode

    20F630 CU20F630 SERVICE MODE Service Mode Overview 1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. 2. Service mode is cleared by entering SERVICE key or CH-UP +VOL-DOWN key command during service mode. 3. If key input port (SERVICE) input is LOW, then it is in service mode.
  • Page 9 20F630 CU20F630 Adjustment Mode Items Item Name Register Range Default SUB-PICTURE 1 Chip CONTRAST 0~127 SUB-TINT 1 Chip TINT 0~127 SUB-COLOR 1 Chip COLOR 0~127 SUB-BRIGHT 1 Chip BRIGHT 0~255 SUB-SHARP 1 Chip VIDEO-TONE 0~63 V-SHIFT 1 Chip V-SHIFT H-SHIFT...
  • Page 10 20F630 CU20F630 Ë SELF ADJUSTMENT H-VCO 1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. 2. H-FREE(1chip) is set to 1. 3. H-OUT is set by intelligent monitor output. 4. IM input is set as TIM input.
  • Page 11 20F630 CU20F630 Setting Mode Items Item Name Register Range Default VideoTone-Gain (TV) 1chip V-TONE 0 / 1 VideoTone-Gain (AV) 1chip V-TONE 0 / 1 VideoTone-Gain(YUV) 1chip V-TONE 0 / 1 ABCL 1chip ABCL 0 / 1 1chip BS-OFF 0 / 1...
  • Page 12 20F630 CU20F630 Option Mode Items ITEM DEFAULT DEM0 Without DEMO With DEMO DOWNLOAD Without V-CHIP OP With V-CHIP OP V-CHIP Without V-CHIP With V-CHIP SPEAKER Without SPEAKER With SPEAKER Without FAO With FAO P.PREF Without P.PREF With P.PREF UNIV+ Without UNIV+...

  • Page 13: Adjustment Method

    20F630 CU20F630 ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items. the other ways is short the main chassis JA309 and JA402 There is three stage of Service Mode data...
  • Page 14 20F630 CU20F630 Second Stage Data Service Mode Function Range Default Data VIDEO TONE -GAIN (TV) V-TONE VIDEO TONE -GAIN (AV V-TONE VIDEO TONE -GAIN(YUV) V-TONE ABCL ABCL BS-OFF ABCL-G ABCL-G SHP-AV VIDEO-TONE(OFFSET) -16~+16 SHP-YUV VIDEO-TONE(OFFSET) -16~+16 SHP-CLIP EXTRGB-CLIP E-SAVE CONTRAST(OFFSET)
  • Page 15 20F630 CU20F630 Third Stage Data Service Mode DATA="0" DATA="1" Default Data DEMO DEMO OFF DOWNLOAD V-CHIP OP OFF V-CHIP V-CHIP OFF SPEAKER SPEAKER OFF FAO OFF P.PREF P.REF OFF UNIV+ UNIV+ OFF VIEW TIMER VIEW TIMER OFF EZ-SETUP EZ-SETUP AUTO PRESET...
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  • Page 28: Chassis Layout

    20F630 CU20F630 MODEL 20F630 CHASSIS LAYOUT...
  • Page 29 20F630 CU20F630 MODEL CU20F630 CHASSIS LAYOUT...

  • Page 30: Block Diagram

    20F630 CU20F630 MODEL 20F630 BLOCK DIAGRAM: MAIN Unit...
  • Page 31 20F630 CU20F630...
  • Page 32 20F630 CU20F630 MODEL CU20F630 BLOCK DIAGRAM: MAIN Unit...
  • Page 33 20F630 CU20F630...
  • Page 34 20F630 CU20F630 MODEL 20F630 BLOCK DIAGRAM: CRT Unit...
  • Page 35 20F630 CU20F630 MODEL CU20F630 BLOCK DIAGRAM: CRT Unit...
  • Page 36 20F630 CU20F630 MODEL 20F630 BLOCK DIAGRAM: MTS MODULE Unit...
  • Page 37 20F630 CU20F630...
  • Page 38 20F630 CU20F630 MODEL 20F630 BLOCK DIAGRAM: MTS MODULE Unit...
  • Page 39 20F630 CU20F630...

  • Page 40: Description Of Schematic Diagram

    20F630 CU20F630 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. Ω Ω Ω signal, the tint setting adjusted for proper color. The (K=k...

  • Page 41: Waveforms

    20F630 CU20F630 WAVEFORMS 1 1.024 Vp-p 2 5.69 Vp-p 3 5.69 Vp-p 4 5.84 Vp-p 5 2.00 Vp-p 6 2.08 Vp-p Horiz.Rate Horiz.Rate Horiz.Rate Horiz.Rate Vert.Rate Vert.Rate 7 6.56 Vp-p 8 6.40 Vp-p 9 4.88 Vp-p 0 158 Vp-p q 1140 Vp-p w 48 Vp-p Horiz.Rate...

  • Page 42: Schematic Diagrams

    20F630 CU20F630 MODEL 20F630 SCHEMATIC DIAGRAM: MAIN Unit...
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  • Page 44 20F630 CU20F630 MODEL CU20F630 SCHEMATIC DIAGRAM: MAIN Unit...
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  • Page 46 20F630 CU20F630 MODEL 20F630 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 47 20F630 CU20F630 MODEL CU20F630 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 48 20F630 CU20F630 MODEL 20F630 SCHEMATIC DIAGRAM: MTS MODULE Unit...
  • Page 49 20F630 CU20F630...
  • Page 50 20F630 CU20F630 MODEL CU20F630 SCHEMATIC DIAGRAM: MTS MODULE Unit...
  • Page 51 20F630 CU20F630...

  • Page 52: Printed Wiring Board Assemblies

    20F630 CU20F630 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 53 20F630 CU20F630 PWB-A: MAIN Unit (Chip Parts Side)
  • Page 54 20F630 CU20F630 PWB-B: CRT Unit (Wiring Side) PWB-E: MTS MODULE Unit (Wiring Side) R3 0 8 1 Q3 0 0 7 R3 0 0 5 C3 0 0 8 C3 0 8 2 R3 0 3 6 RJ 7 RJ 2...

  • Page 55: Replacement Parts List

    2. NO. DE REF 3. NO. DE PIECE 4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. For in CANADA: Contact SHARP Electronics of Canada Limited location of SHARP Parts Distributor, Please call Toll-Free; 1- Phone (416) 890-2100...
  • Page 56 20F630 CU20F630 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ D502 RH-EX0652GEZZ X Zener Diode, 18V C202 VCEA0A0JW477M+ X 470 6.3V Electrolytic ∗ ∗ D503 RH-EX0612GEZZ X Zener Diode, 5.1V C203 VCKYCY1HF103Z X 0.01 Ceramic ∗...
  • Page 57 20F630 CU20F630 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ ∗ C802 VCKYCY1HF103Z X 0.01 Ceramic RJ19 VRS-CY1JF000J 1/16W Metal Oxide ∗ C803 VCEA0A1AW476M+X 47 Electrolytic RJ22 VRS-CY1JF000J 1/16W Metal Oxide ∗ ∗ C804 VCKYCY1HF103Z X 0.01...
  • Page 58 20F630 CU20F630 Ref. No. Part No. Description Code Ref. No. Part No. Description Code ∗ ∗ R602 VRD-RA2BE393J X 39k 1/8W Carbon R833 VRS-CY1JF101J X 100 1/16W Metal Oxide ∗ ∗ R603 VRD-RA2BE273J X 27k 1/8W Carbon R835 VRS-CY1JF332J X 3.3k 1/16W Metal Oxide ∗...
  • Page 59 20F630 CU20F630 Ref. No. Part No. Description Code Ref. No. Part No. Description Code S1004 QSW-K0202PEZZ+ X Switch, VOL.-DOWN R859 VRS-VV3DB123J X 12k 2W Metal Oxide å S1005 QSW-K0202PEZZ+ X Switch, MENU R861 VRS-VV3DB123J X 12k 2W Metal Oxide å...
  • Page 60 20F630 CU20F630 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C3044 VCEA0A1EW476M+X 47 Electrolytic MISCELLANEOUS PARTS C3045 VCEA0A1HW335M+X 3.3 Electrolytic C3046 VCEA0A1HW335M+X 3.3 Electrolytic SP301 VSP1205PB09WA X Speaker(L) C3047 VCEA0A1HW335M+X 3.3 Electrolytic SP302 VSP1205PB09WA X Speaker(R) C3048 VCEA0A1HW335M+X 3.3...
  • Page 61 ACCESSORIES CCABAA323WEH0 X Front Cabinet Ass’y RRMCGA108WJSA X Infrated R/C Unit Not Available – Front Cabinet — TGAN-0001GJZZ X Guarantee Card HBDGB3155CESA X SHARP Badge (20F630) HDECQA119WJSA X LED/RC Cover TiNS-A725WJZZ X Operation Manual JBTN-A070WJKA X Power Button (20F630) MSPRC0005PEFW X Power Button Spring...

  • Page 62: Packing Of The Set

    20F630 CU20F630 PACKING OF THE SET...
  • Page 63 20F630 CU20F630...
  • Page 64 20F630 CU20F630 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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