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Sharp 20U-FS1 Service Manual
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Sharp 20U-FS1 Service Manual

Sharp 20U-FS1 Service Manual

Color television
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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 .............................................................................................................................. 29
» SCHEMATIC DIAGRAMS ................................................................................................................... 34
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 42
» REPLACEMENT PARTS LIST ............................................................................................................ 46
» PACKING OF THE SET ...................................................................................................................... 55
POWER INPUT ..................................................... AC 120 V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
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

SERVICE MANUAL

MODELS
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ................................................................... 6 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
20U-FS1
CU20FS1
(EIA, Channel Plan U.S.A.)
20U-FS1
CU20FS1
S52J320U-FS1/
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Summary of Contents for Sharp 20U-FS1

  • Page 1: Table Of Contents

    20U-FS1 CU20FS1 SERVICE MANUAL S52J320U-FS1/ COLOR TELEVISION Chassis No. GA-2 20U-FS1 CU20FS1 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

    20U-FS1 CU20FS1 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

    20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 PRECAUTIONS A PRENDRE LORS DE LA REPARATION 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 20U-FS1 CU20FS1 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

    20U-FS1 CU20FS1 LOCATION OF USER'S CONTROL Front Panel VIDEO IN 2 L-AUDIO-R POWER Press → On. Press again → Off. POWER PUSH BUTTON SENSOR AREA FOR (INSIDE DOOR) REMOTE CONTROL MENU. Press → Accesses MAIN MENU. Press again → Exits MAIN MENU.

  • Page 7: Installation And Service Instructions

    20U-FS1 CU20FS1 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

    20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 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: Self Adjustment

    20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 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

    20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 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 20U-FS1 CU20FS1 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...
  • Page 16 20U-FS1 CU20FS1...
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  • Page 28: Chassis Layout

    20U-FS1 CU20FS1 CHASSIS LAYOUT...

  • Page 29: Block Diagram

    20U-FS1 CU20FS1 BLOCK DIAGRAM-1...
  • Page 30 20U-FS1 CU20FS1 BLOCK DIAGRAM-2...
  • Page 31 20U-FS1 CU20FS1...
  • Page 32 20U-FS1 CU20FS1 BLOCK DIAGRAM-3...
  • Page 33 20U-FS1 CU20FS1...

  • Page 34: Schematic Diagrams

    20U-FS1 CU20FS1 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. (K=k Ω =1000 Ω , M=M Ω ) signal, the tint setting adjusted for proper color. The wave shapes at the red, green and blue cathodes of 2.
  • Page 35 20U-FS1 CU20FS1 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 36 20U-FS1 CU20FS1 MODEL 20U-FS1 SCHEMATIC DIAGRAM: MAIN Unit...
  • Page 37 20U-FS1 CU20FS1...
  • Page 38 20U-FS1 CU20FS1 MODEL CU20FS1 SCHEMATIC DIAGRAM: MAIN Unit...
  • Page 39 20U-FS1 CU20FS1...
  • Page 40 20U-FS1 CU20FS1 SCHEMATIC DIAGRAM: MTS MODULE Unit...
  • Page 41 20U-FS1 CU20FS1...

  • Page 42: Printed Wiring Board Assemblies

    20U-FS1 CU20FS1 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 43 20U-FS1 CU20FS1 PWB-A: MAIN Unit (Chip Parts Side)
  • Page 44 20U-FS1 CU20FS1 PWB-B: CRT Unit (Wiring Side) PWB-B: CRT Unit (Chip Parts Side)
  • Page 45 20U-FS1 CU20FS1 PWB-E: MTS MODULE Unit (Wiring Side) PWB-E: MTS MODULE Unit (Chip Parts Side)

  • Page 46: 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 47 20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB177WEA2(20U-FS1) PACKAGED CIRCUITS PWB-A: DUNTKB177WEA3(CU20FS1) å PR702 RMPTP0092CEZZ J Packaged Circuit MAIN UNIT (Continued) RMPTP0026CEZZ Q753 VS2PC1815G+-1+ R 2PC1815G RMPTP0072CEZZ VS2SC3198-G1E X801 RCRSAA009WJZZ J Crystal...
  • Page 48 20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB177WEA2(20U-FS1) C819 VCCCCY1HH121J J 120p 50V Ceramic PWB-A: DUNTKB177WEA3(CU20FS1) C820 VCEA0A1HW474M J 0.47 C821 VCKYCY1HF153Z J 0.015 50V Ceramic MAIN UNIT (Continued) C822 VCEA0A1HW105M J 1 C514 VCFYSA1JB273J+ J 0.027 63V...
  • Page 49 20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB177WEA2(20U-FS1) R604 VRD-RA2BE473J J 47k 1/8W Carbon PWB-A: DUNTKB177WEA3(CU20FS1) R605 VRD-RM2HD104J J 100k 1/2W Carbon R606 VRN-VV3LBR27J J 0.27 3W M-Film MAIN UNIT (Continued) R611 VRN-VV3ABR27J J 0.27 1W...
  • Page 50 20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKB177WEA2(20U-FS1) SWITCHES PWB-A: DUNTKB177WEA3(CU20FS1) S1001 QSW-K0077GEZZ J CH-Up MAIN UNIT (Continued) S1002 QSW-K0077GEZZ J CH-Down S1003 QSW-K0077GEZZ J VOL-Up R829 VRS-CY1JF472J J 4.7k 1/16W M-Ox.

  • Page 51: Crt Unit

    20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-B: DUNTKB178WEA2(20U-FS1) PWB-E:DUNTKB271FMA0 PWB-B: DUNTKB178WEA3(CU20FS1) MTS MODULE UNIT CRT UNIT TRANSISTORS INTEGRATED CIRCUITS Q881 VS2PA1015Y+-1+ R 2PA1015Y+ IC3001 VHiCXA2074Q-1 J CXA074Q Q882 VS2SC3789//1E J 2SC3789 IC3002 VHiMM1501XN-1Y R MM1501XNRE...
  • Page 52 20U-FS1 CU20FS1 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-E:DUNTKB271FMA0 MTS MODULE UNIT R3014 VRS-CY1JF102J J 1k 1/16W M-Ox. R3016 VRS-CY1JF102J J 1k 1/16W M-Ox. R3018 VRS-CY1JF102J J 1k 1/16W M-Ox. R3019 VRS-CY1JF102J J 1k 1/16W M-Ox.

  • Page 53: Packing Parts

    Ref. No. Part No. Description Code PACKING PARTS MISCELLANEOUS PARTS (NOT REPLACEMENT ITEM) ACC701 QACCD3090CESA J AC Cord å SPAKCA038WJZZ – Packing Case(20U-FS1) — SP301 VSP1206PB50WA J Speaker(L) SPAKCA088WJZZ – Packing Case(CU20FS1) — SP302 VSP1206PB50WA J Speaker(R) SPAKP0110PEZZ – Wrapping Paper —...

  • Page 54: Cabinet Parts

    Description Code Ref. No. Part No. Description Code CABINET PARTS CABINET PARTS LOCATION CCABA2717WEV0 R Front Cabinet Ass’y(20U-FS1) BN CCABA2717WEV1 R Front Cabinet Ass’y(CU20FS1) BN Not Available – Front Cabinet — JBTN-A011WJSA R Button, Power 1 1-1 MSPRC0005PEFW R Spring, for Power Button GCOVAA010WJSA R R/C, LED Cover HBDGB3142CESA J Badge, "SHARP"...

  • Page 55: Packing Of The Set

    20U-FS1 CU20FS1 PACKING OF THE SET Polyethylene Bag Operation Manual Guarantee Card(20U-FS1) Batteries Wrapping Paper Infrared R/C Unit Buffer Material FRONT Packing Case Serial No. Label Use 22 staples fix the packing case. REAR MARK : Not replacement items.
  • Page 56 20U-FS1 CU20FS1 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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