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Sharp 32C240 Service Manual

Sharp color television service manual
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See also: Operating Manual
32C240
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 ..................................................................................................... 4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 6
» SERVICE ADJUSTMENT ...................................................................................................................10
» CHASSIS LAYOUT ............................................................................................................................. 12
» BLOCK DIAGRAM ..............................................................................................................................13
» DESCRIPTION OF SCHEMATIC DIAGRAM & WAVEFORMS .......................................................... 14
» SCHEMATIC DIAGRAMS ...................................................................................................................15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 22
» REPLACEMENT PARTS LIST ............................................................................................................25
» PACKING OF THE SET ...................................................................................................................... 33
POWER INPUT ..................................................... 120V AC, 60 Hz
POWER RATING .................................................................. 135W
PICTURE SIZE .......................................... 3,073 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 .............. 3.0W + 3.0W (at 10% distortion and

SHARP CORPORATION

SERVICE MANUAL

32C241
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ........................................................ 12 x 6 cm oval (2 pcs.)
2
(476sq 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)
Dual CH Operate)
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. GB-3U (1W)
32C240
32C241
MODELS
(EIA, Channel Plan U.S.A.)
32C240
32C241
S24O932C240//
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Summary of Contents for Sharp 32C240

  • Page 1: Table Of Contents

    32C240 32C241 SERVICE MANUAL S24O932C240// COLOR TELEVISION Chassis No. GB-3U (1W) 32C240 32C240 32C241 32C241 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

    32C240 32C241 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

    32C240 32C241 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) BEFORE RETURNING THE RECEIVER Connect the resistor connection to all exposed metal 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 Before returning the receiver to the user, perform across the resistor.

  • Page 4: Location Of User's Control

    32C240 32C241 LOCATION OF USER'S CONTROL (32C240) Front Panel VIDEO/AUDIO IN 2 TERMINALS Front Panel POWER Press VIDEO/AUDIO IN 2 TERMINALS POWER Press again Off. Press Press again Off. CHANNEL UP/DOWN ( ) Selects next higher channel. ( ) Selects next lower channel.
  • Page 5 32C240 32C241 LOCATION OF USER'S CONTROL (32C241) VIDEO/AUDIO IN 2 TERMINALS Front Panel POWER Press Press again Off. CHANNEL UP/DOWN ( ) Selects next higher channel. ( ) Selects next lower channel. " MENU Press Accesses MAIN MENU. Press again Exits MAIN MENU.

  • Page 6: Installation And Service Instructions

    32C240 32C241 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 7 32C240 32C241 For 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 analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv- ice adjustments are required.
  • Page 8 TINT-S 0-127 (00h-7Fh) 62 (3Eh) Component Input C-TRAP 0-1 (00h-01h) 0 (00h) AUTO FRESH 0-1 (00h-01h) 0 (00h) SHARP P F 0-1 (00h-01h) 1 (01h) CD MATRIX 0-3 (00h-03h) 2 (02h) B-Y ATT 0-1 (00h-01h) 0 (00h) R-Y ATT 0-1 (00h-01h)
  • Page 9 32C240 32C241 B. SPECIAL SETTING DATA SERVICE NOTES FIXED VALUE ADJUSTMENT ITEM NUMBER (HEX) RANGE INITIAL VALUE FAO VOLUME 0-50 (00h-32h) 36 (24h) CC-POSITION 0-127 (00h-7Fh) 27 (1Bh) 0-255 (00h-FFh) 122 (7Ah) Interrupt period adjustment. A-ATT 0-127 (00h-7Fh) 90 (5Ah)

  • Page 10: Service Adjustment

    32C240 32C241 SERVICE ADJUSTMENT RF AGC Adjustment White Balance Adjustment 1. Receive a good local channel. 1. Receive a good local channel. 2. Enter the service mode and select the service 2. Enter the service mode and select the service adjustment "R01".

  • Page 11: Mts Adjustment

    32C240 32C241 Sub-Tint Adjustment Vertical Phase Adjustment 1. Receive the half color bar signal. 1. Enter the service mode and input "D01" data value RF INPUT (TU51) to "00h". 2. Get into Y-Mute by R/C, or by setting the "V11" bus 2.

  • Page 12: Chassis Layout

    32C240 32C241 CHASSIS LAYOUT...

  • Page 13: Block Diagram

    32C240 32C241 BLOCK DIAGRAM...

  • Page 14: Description Of Schematic Diagram & Waveforms

    32C240 32C241 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. signal, the tint setting adjusted for proper color. The (K=k =1000 , M=M ) wave shapes at the red, green and blue cathodes of 2.

  • Page 15: Schematic Diagrams

    32C240 32C241 SCHEMATIC DIAGRAMS CRT UNIT...
  • Page 16 32C240 32C241 MAIN-1 UNIT...
  • Page 17 32C240 32C241...
  • Page 18 32C240 32C241 MAIN-2 UNIT...
  • Page 19 32C240 32C241...
  • Page 20 32C240 32C241 2 LINE Y/C UNIT...
  • Page 21 32C240 32C241...

  • Page 22: Printed Wiring Board Assemblies

    32C240 32C241 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (A Side)
  • Page 23 32C240 32C241 PWB-A: MAIN Unit (B Side)
  • Page 24 32C240 32C241 PWB-B: CRT Unit (Wiring Side) PWB-D: 2 LINE Y/C Unit (Wiring Side) PWB-D: 2 LINE Y/C Unit (Chip Parts Side)

  • Page 25: Replacement Parts List

    IC751 VHiPQ09RDA1-1 X PQ090RDA1SZ IC900 VHiCXA2089Q-2Y X CXA2089Q-6T IC1403 VHiPQ05RDA1-1 X PQ050RDA1SZ in USA: Contact your nearest SHARP Parts Distributor to order. For IC2001 RH-iXA418WJZZQ X TMP88CS38BFG location of SHARP Parts Distributor, Please call Toll-Free; 1- IC2040 VHiKiA7045A-1+ X KIA7045AP 800-BE-SHARP...
  • Page 26 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code D651 VHD1SS244//-1Y X 1SS244 CAPACITORS ' å D652 RH-EX0641GEZZY X Zener Diode, 12V ' å VCEA0A1HW105M+X 1 Electrolytic D653 VHD1SS133++-1Y X 1SS133++ ' å VCEA0A1HW475M+X 4.7 Electrolytic ' å...
  • Page 27 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C603 VCEA0A1HW225M+X 2.2 Electrolytic C812 VCQYTA1HM104J+ X 0.1 Mylar C604 VCKYCY1EB223KY X 0.022 25V Ceramic C901 VCKYCY1HB103KY X 0.01 Ceramic C606 VCKYPA2HB561K+ X 560p 500V Ceramic C902 VCKYCY1HB103KY X 0.01...
  • Page 28 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code VRS-CY1JF000JY X 0 1/16W Metal Oxide R437 VRS-CY1JF101JY X 100 1/16W Metal Oxide VRS-CY1JF000JY X 0 1/16W Metal Oxide R438 VRS-CY1JF101JY X 100 1/16W Metal Oxide...
  • Page 29 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R698 VRS-CY1JF335JY X 3.3M 1/16W Metal Oxide R954 VRS-CY1JF221JY X 220 1/16W Metal Oxide R703 VRW-KQ4AC1R2K X 1.2 Cement R955 VRS-CY1JF221JY X 220 1/16W Metal Oxide å...
  • Page 30 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R2503 VRS-CY1JF103JY X 10k 1/16W Metal Oxide Q852 VS2SC4544LB1E X 2SC4544LB R2504 VRS-CY1JF103JY X 10k 1/16W Metal Oxide Q853 VS2SC3198-G-1+ X 2SC3198-G R2505 VRD-RA2BE822JY X 8.2k 1/8W...
  • Page 31 32C240 32C241 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R884 VRD-RA2BE221JY X 220 1/8W Carbon R1423 VRS-CY1JF102FY X 1k 1/16W Metal Oxide R885 VRD-RA2BE221JY X 220 1/8W Carbon R1427 VRS-CY1JF000JY X 0 1/16W Metal Oxide...
  • Page 32 QCNW-B126WJZZ X Connecting Cord Not Available – Front Cabinet — QCNW-B238WJZZ X Connecting Cord 1-2A GCOVA0117GJKA X RC/LED Cover(32C241) 1-2B GCOVA0119GJKA X RC/LED Cover(32C240) HBDGB1009MESB X SHARP Badge 1-4A JBTN-0132GJKB X Power Button(32C241) SUPPLIED ACCESSORIES 1-4B JBTN-0119GJKC X Power Button(32C240)

  • Page 33: Packing Of The Set

    32C240 32C241 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C Unit Batteries Polyethylene Mat Buffer Material FRONT Packing Case Use tape to fix the top side of packing case. Packing Case Label REAR Use 12 staples to fix the bottom side of packing case.
  • Page 34 32C240 32C241 COPYRIGHT © 2004 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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