Service manual

ManualsBrandsSharp ManualsCRT TV32C540

SHARP CORPORATION

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

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.

COLOR TELEVISION

Chassis No. GB-3' 1W

Page

» ELECTRICAL SPECIFICATIONS .........................................................................................................1

» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2

» LOCATION OF USER'S CONTROL .....................................................................................................4

» INSTALLATION AND SERVICE INSTRUCTIONS................................................................................5

» SERVICE ADJUSTMENT .....................................................................................................................9

» CHASSIS LAYOUT .............................................................................................................................12

» BLOCK DIAGRAM ..............................................................................................................................13

» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS ........................................................14

» SCHEMATIC DIAGRAMS ...................................................................................................................15

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................22

» PARTS LIST........................................................................................................................................25

» PACKING OF THE SET......................................................................................................................34

CONTENTS

SPEAKER

SIZE ........................................................ 12 x 6 cm oval (2 pcs.)

VOICE COIL IMPEDANCE............................... 8 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.)

POWER INPUT ..................................................... 120V AC, 60 Hz

POWER RATING..................................................................135W

PICTURE SIZE.......................................3,073cm

(476sq 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 .............. 5.0W + 5.0W (at 10% distortion and

Dual CH Operate)

Specifications are subject to change without

prior notice.

ELECTRICAL SPECIFICATIONS

MODELS

SERVICE MANUAL

32C540

Summary of content (36 pages)

PAGE 1
32C540 SERVICE MANUAL COLOR TELEVISION Chassis No. GB-3'1W MODELS 32C540 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. CONTENTS Page » ELECTRICAL SPECIFICATIONS ......................................................................................................... 1 » IMPORTANT SERVICE SAFETY PRECAUTION ................................................
PAGE 2
32C540 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 should be attempted. 2. Disconnect AC power before servicing. 3. Semiconductor heat sinks are potential shock hazards when the chassis is operating. 4.
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2C540 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard) Before returning the receiver to the user, perform the following safety checks. 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver. 2.
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32C540 LOCATION OF USER'S CONTROL Front Panel INSIDE DOOR POWER Press → On. Press again → Off. VIDEO/AUDIO IN 2 TERMINALS REMOTE CONTROL SENSOR MENU Press → Accesses MAIN MENU. Press again → Exits MAIN MENU. VOLUME UP/DOWN ( + ) Increases sound. ( —) Decreases sound. CHANNEL UP/DOWN (') Selects next higher channel. (") Selects next lower channel. Basic Remote Control Functions Infrared Transmitter Window POWER Press → On. Press again → Off.
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32C540 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. CIRCUIT PROTECTION HIGH VOLTAGE CHECK The receiver is protected by a 4.0A fuse (F701), mounted on PWB-A, wired into one side of the AC line input.
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32C540 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 service adjustments are required. 1. Service mode To enter the service mode and exit service mode.
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32C540 A.
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32C540 SERVICE NUMBER D14 D15 D18 D19 D20 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 DATA ADJUSTMENT ITEM RANGE EW CORNER BOTTOM NOISE DET LEVEL V CENTERING V-AGC V POSITION-VCOMP H POSITION-VCOMP V SIZE-VCOMP H SIZE-VCOMP V-LINEARITY-VCOMP V-C CORRECTION-VCOMP EW PARABOLA-VCOMP EW TRAPEZIUM-VCOMP V EHT-VCOMP H EHT-VCOMP EW CORNER-VCOMP EW CORNER BOTTOM-VCOMP V BLK UPPER-VCOMP V BLK LOWER-VCOMP V CENTERING-VCOMP NOTES INITIAL VALUE 19-81 (13h-51h) 0-3 (00h-03h) 0-63 (00-3Fh) 0-1 (00h-01h) 0
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32C540 Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC2101. PART REPLACED IC2001 ADJUSTMENT NECESSARY UNNECESSARY X NOTES IC201 X IC2101 X CRT X Data is stored in IC2101. The adjustment is needed to compensate for characteristics of parts including IC201 and MTS level (M01).
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32C540 Note: Aging for 10 min before adjustment. After the adjustment of V-center and V-size, readjustment for this V-line. Sub-Tint Adjustment 1. Receive the half color bar signal. • RF INPUT (TU51) 2. Get into Y-Mute by R/C, or by setting the "V11" bus data to "01". 3. Vary the "V02" bus data until the waveform becomes as stated below. LEVEL B-AMP Base waveform in step (TP47B) Vertical Phase Adjustment (SCREEN FORMAT 4:3) 1. Enter the service mode and input data of “00h” on "D01". 2.
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32C540 Ë MTS ADJUSTMENT MTS Level Adjustment 1. Set the sound volume above 1. Monoral signal: 400Hz, 100% modulation 2. Confirm "EX4" data is "5Ah". 3. Vary the "M01" bus data until the voltage to pin (39) of IC3001 to become the value as stated below. SETTING VOLTAGE ADJ spec : 490±10mVrms CHK spec: 490±20mVrms Separation Adjustment 1. Input "SIGNAL 1" and vary the "M04" bus data to get the minimun AC voltage to pin (39) of IC3001. 2.
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32C540 CHASSIS LAYOUT J I H G F E D C B A 1 2 3 4 5 6 12 7 8 9 10
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32C540 BLOCK DIAGRAM J I H G F E D C B A 1 2 3 4 5 13 6 7 8 9 10
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32C540 DESCRIPTION OF SCHEMATIC DIAGRAM NOTES: WAVEFORM MEASUREMENT CONDITIONS: 1. The unit of resistance "ohm" is omitted. (K=kΩ=1000Ω, M=MΩ) 2. All resistors are 1/16 watt, unless otherwise noted. 3. All capacitors are µ F, unless otherwise noted. (P=pF=µµF) 4. (G) indicates ±2% tolerance may be used. 5. indicates line isolated ground. 1. Photographs taken on a standard gated color bar signal, the tint setting adjusted for proper color.
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32C540 SCHEMATIC DIAGRAM: CRT Unit H G F E D C B A 1 2 3 4 15 5 6
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32C540 SCHEMATIC DIAGRAM: MAIN-1 Unit H G F E D C B A 1 2 3 4 5 6 16 7 8 9 10
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32C540 10 11 12 13 14 15 17 16 17 18 19
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32C540 SCHEMATIC DIAGRAM: MAIN-2 Unit H G F E D C B A 1 2 3 4 5 6 18 7 8 9 10
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32C540 10 11 12 13 14 15 19 16 17 18 19
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32C540 SCHEMATIC DIAGRAM: 3-LINE Y/C Unit H G F E D C B A 1 2 3 4 5 6 20 7 8 9 10
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32C540 10 11 12 13 14 15 21 16 17 18 19
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32C540 PRINTED WIRING BOARD ASSEMBLIES H G F E D C B A PWB-A: MAIN Unit (A Side) 1 2 3 4 22 5 6
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32C540 H G F E D C B A PWB-A: MAIN Unit (B Side) 1 2 3 4 23 5 6
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32C540 H G F E D PWB-B: CRT Unit (Wiring Side) C B A PWB-C: 3-LINE Y/C Unit (Wiring Side) 1 2 PWB-C: 3-LINE Y/C Unit (Chip Parts Side) 3 4 24 5 6
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32C540 « Description Ref. No. Part No. PARTS LIST PWB-A: DUNTKC290WEA2 MAIN UNIT PARTS REPLACEMENT TUNER NOTE:THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDETLY Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features are identified by å and shaded areas in the Replacement Parts Lists and Schematic Diagrams.
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32C540 « Description Ref. No. Part No.
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32C540 « Description Ref. No. Part No. Code PWB-A: DUNTKC290WEA2 U U U MAIN UNIT CAPACITORS [EL.··· Electrolytic, M-Poly.
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32C540 « Description Ref. No. Part No. Ref. No. Part No. Code MAIN UNIT RJ12 RJ14 RJ15 RJ16 RJ17 RJ19 RJ20 RJ21 RJ22 RJ23 RJ24 RJ25 RJ30 RJ33 RJ36 RJ38 RJ39 RJ40 RJ42 RJ45 RJ47 RJ48 RJ49 RJ50 R54 R55 R56 R57 R201 R202 R203 R204 R205 R206 R211 R212 R225 R226 R227 R232 R234 R236 R301 R305 R306 R307 R308 R355 R361 R362 R363 R364 R365 R368 R369 R371 R372 R403 R404 R406 R407 R408 R410 R411 R412 R413 CAPACITORS [EL.··· Electrolytic, M-Poly.
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32C540 « Description Ref. No. Part No. Code PWB-A: DUNTKC290WEA2 U MAIN UNIT RESISTORS [M-Ox.
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32C540 « Description Ref. No. Part No. Code PWB-A: DUNTKC290WEA2 MAIN UNIT RESISTORS [M-Ox.
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32C540 Ref. No. « Description Part No. Code Ref. No. PWB-A: DUNTKC290WEA2 U MAIN UNIT RESISTORS [M-Ox.
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C540 Ref. No. « Description Part No. Code Ref. No. CRT UNIT RESISTORS [M-Ox.
PAGE 33
32C540 Ref. No. « Description Part No. Ref. No. Code PWB-C DUNTKB573WEV0 RESISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] VRS-CY1JF331JY VRS-CY1JF222JY VRS-CY1JF564JY VRS-CY1JF103JY VRD-RA2BE103JY VRS-CY1JF821JY VRS-CY1JF103JY VRS-CY1JF682JY VRS-CY1JF102JY VRS-CY1JF102JY FB1401 P1401 RBLN-0061TAZZY QPLGZ0810CEZZ X X X X X X X X X X 330 2.2k 560k 10k 10k 820 10k 6.8k 1k 1k 1/16W 1/16W 1/16W 1/16W 1/8W 1/16W 1/16W 1/16W 1/16W 1/16W M-Ox. M-Ox. M-Ox. M-Ox. Carbon M-Ox. M-Ox. M-Ox. M-Ox. M-Ox.
PAGE 34
32C540 32C540 PACKING OF THE SET ★ Polyethylene Bag Operation Manual Infrared R/C Unit ★ Batteries ★ Polyethylene Sheet ★Buffer Material FRONT ★ Packing Case Use tape to fix the top side of packing case. REAR Use 12 staples to fix the bottom side of packing case. ★ MARK : Not replacement items.
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32C540 35
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32C540 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. QRC0020-U March. 2004 Modify : SEMEX Design and Production Information Design : SEM Production : SEMEX JB SHARP ELECTRONICA MEXICO S. A. DE C. V. Quality & Reliability Control Center Blvd. SHARP No.