Sharp 27U-S50 Service Manual

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1
27U-S50
COLOR TELEVISION
Chassis No. C/D-BM
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.
S12F527U-S50/
» ELECTRICAL SPECIFICATIONS .........................................................................................................1
» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
» LOCATION OF USER'S CONTROL .....................................................................................................4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5
» CHASSIS LAYOUT .............................................................................................................................11
» BLOCK DIAGRAM ..............................................................................................................................12
» SCHEMATIC DIAGRAMS ...................................................................................................................13
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................19
» REPLACEMENT PARTS LIST ............................................................................................................22
» PACKING OF THE SET ......................................................................................................................29
Page
SHARP CORPORATION
CONTENTS
SERVICE MANUAL
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
MODEL
POWER INPUT .................................................... 120 V AC 60 Hz
POWER RATING ..................................................................105 W
PICTURE SIZE ........................................... 2,187cm
2
(339sq inch)
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
(Nominal)
AUDIO POWER
OUTPUT RATING ..................... 1.5W + 1.5W (at 10% distortion
and Dual CH Operate)
ELECTRICAL SPECIFICATIONS
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE ............................. 32 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
(EIA, Channel Plan U.S.A.)
Specifications are subject to change without
prior notice.
27U-S50
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Summary of Contents

Page 1 - SERVICE MANUAL

127U-S50COLOR TELEVISIONChassis No. C/D-BMIn the interests of user-safety (Required by safety regulations in some countries) the set should be restore

Page 2

1027U-S50ËMTS ADJUSTMENTMTS Level Adjustment1. Feed the following monaural signal to pin (14) ofIC3001.Monaural signal: 300Hz, 245mVrms2. Connect the

Page 3 - (Fire & Shock Hazard)

1127U-S50654321ABCDEFGHCHASSIS LAYOUT

Page 4 - Front Panel

1227U-S50654321ABCDEFGHBLOCK DIAGRAM

Page 5 - HIGH VOLTAGE CHECK

1327U-S50DESCRIPTION OF SCHEMATIC DIAGRAMNOTES:1. The unit of resistance "ohm" is omitted.(K=kΩ=1000Ω, M=MΩ)2. All resistors are 1/16 watt,

Page 6 - 2. Service number selection

1527U-S5014121110987654321ABCDEFGHSCHEMATIC DIAGRAM: MAIN-1 Unit

Page 7 - FIX VALUE

1727U-S5016121110987654321ABCDEFGHSCHEMATIC DIAGRAM: MAIN-2 Unit

Page 8 - INITIAL VALUE

1827U-S50654321ABCDEFGHSCHEMATIC DIAGRAM: CRT Unit

Page 9 - SERVICE ADJUSTMENT

1927U-S50654321ABCDEFGHPRINTED WIRING BOARD ASSEMBLIESPWB-B: CRT Unit (Wiring Side)

Page 10 - MTS ADJUSTMENT

2027U-S50654321ABCDEFGHPWB-A: MAIN Unit (Wiring Side)

Page 11 - CHASSIS LAYOUT

2127U-S50654321ABCDEFGHPWB-A: MAIN Unit (Chip Parts Side)

Page 12 - BLOCK DIAGRAM

227U-S50IMPORTANT SERVICE SAFETY PRECAUTIONËService work should be performed only by qualified service technicians who are thoroughlyfamiliar with all

Page 13 - WAVEFORMS

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2227U-S50Ref. No. Part No. ★ Description CodePICTURE TUBEPRINTED WIRING BOARD

Page 14

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2327U-S50PWB-A: DUNTKA462WEA0MAIN UNIT (Continued) orVSSTP6NC60+-1

Page 15

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2427U-S50PWB-A: DUNTKA462WEA0MAIN UNIT (Continued) orRC-FZ017SGEZZ

Page 16 - SCHEMATIC DIAGRAM: CRT Unit

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2527U-S50C2006 VCKYCY1HF103Z J 0.01 50V Ceramic AAC2040 VCEA0A1AW107M J 100 1

Page 17 - PWB-B: CRT Unit (Wiring Side)

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2627U-S50PWB-A: DUNTKA462WEA0MAIN UNIT (Continued)R659 VRD-RA2BE332J J 3.3k 1

Page 18

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2727U-S50PWB-B: DUNTK9510WEW3CRT UNITTRANSISTORSQ851 VS2SC3198-Y-1 J 2SC3198(

Page 19

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code2827U-S50SUPPLIED ACCESSORIESMISCELLANEOUS PARTSåACC701QACCD3064CESA J AC Cor

Page 20 - PARTS LIST

2927U-S50PACKING OF THE SET★ Packing Case★ MARK : Not replacement items.FRONT★Buffer Material★ Polyethylene Mat★ Polyethylene BagOperation ManualInfra

Page 21 - PWB-A: DUNTKA462WEA0

3027U-S50COPYRIGHT © 2002 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval system, or trans

Page 22

327U-S50SAFETY NOTICEMany electrical and mechanical parts in televisionreceivers have special safety-related characteristics.These characteristics are

Page 23

427U-S50LOCATION OF USER'S CONTROLFront PanelPOWERPress → On.Press again → Off.SENSOR AREA FORREMOTE CONTROLVIDEO IN 2 L-AUDIO-R(VIDEO/AUDIO te

Page 24

527U-S50CIRCUIT PROTECTIONThe receiver is protected by a 4.0A fuse (F701),mounted on PWB-A, wired into one side of the ACline input.X-RADIATION PROTEC

Page 25 - PWB-B: DUNTK9510WEW3

627U-S50For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit.Note: There are still a few an

Page 26 - CABINET PARTS LOCATION

727U-S50Table - ABelow are the ranges and initial values for each adjustment and in each categories.DEFD01 H-PHASE 00-1F 0CD02 V-SIZE 00-7F 40D03 V-PO

Page 27 - PACKING OF THE SET

827U-S50IC2001IC2102XIC3001 XIC201Data is stored in IC2102.Adjust items related MTS only.Holding down both the Vol-up/Ch-down buttons on the TV set at

Page 28

927U-S50Figure B: WAVEFORM FOR SCREEN ADJUSTMENTËSERVICE ADJUSTMENTNote: Before making the service adjustment, make thebus data settings.+B Adjustment

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