Sharp CX-34G3 Service Manual
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Sharp CX-34G3 Service Manual

Sharp CX-34G3 Service Manual

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S H A R P
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.
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Reminder/ON-Off Timer
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English/Arabic/Chinese/French/Russian/Malay six
Language OSD
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Wide Range Chopper Regulator System
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Front A/V Input Rear A/V Input/Output Terminal
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
IMPORTANT SERVICE NOTES . . . . . . . . . . . . . . . . . . . . . . . . 2
ADJUSTMENT PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . 3
TROUBLE SHOOTING TABLE . . . . . . . . . . . . . . . . . . . . . . . . 17
CHASSIS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user -serviceable
parts inside. Refer servicing to qualified service personnel.

SERVICE MANUAL

MODELS
FEATURE
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CONTENTS
Page
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. BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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WARNING

SHARP CORPORATION

COLOUR TELEVISION
Chassis No. SP-67
Blue Back Noise Mute
Direct Access Remote Control
Black Strech Circuit
WAVE FORMS . . . . . . . . . . . . . . . . . ..*.............................. 22
REPLACEMENT PARTS LIST . . . . . . . . . . . ..*........... 35
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Summary of Contents for Sharp CX-34G3

  • Page 1: Table Of Contents

    The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user -serviceable parts inside. Refer servicing to qualified service personnel. SHARP CORPORATION...

  • Page 2: Specifications

    Tuner Ranges 1. CX-34G3: When repairing the circuit, be sure not to Increase the high voltage to more VHF-Channels .._......than 23.5 kV (at beam 0 PA) for the set.

  • Page 3: Adjustment Precautions

    SERVICE MODE ADJUSTMENT PRECAUTIONS (1) Press the specific keys to change the modes as follows. This model’s settings are adjusted in two different ways: through the PC bus control and in the conventional analog COLOUR ADJUST mode manner. The adjustment via the PC bus control includes preset-only items and variable data. 1.
  • Page 4 Y DELAY N;SC (DT NTSC TVIAV) SUB SUBTIY ( SUB TIN) V-PHASE 60 Hz (V-CENTERGO) Y DELAY BtW (DT BW TVIAV) SUB SHAFtTESS (SUB SHARP) H-PHASE 60 Hz (H-CENTERGO) VIDEO MUT; ON/OFF (V-MUTE) Y-SUB CONTRAST (Y SUB CON) VIDEO 2 ON/OFF (AV2)
  • Page 5 l 3 : When the ICI001 is RH-iX2938CEZZ/Nl, change the NVM data from 00 to 01 (address FACTORY SETTING (as from the July 1997 production). ‘4 : Only 0 through 5 must be used in changing the data. (1) The following key-in data have been factory-set for the E2PROM. INITIAL SETTINGS OF CHANNEL SELECTION DATA (1) Make an entry of MCLI in the service mode in order to set the following channel selection data to the LAST FB POS...
  • Page 6 Adjusting point Adjusting procedure/conditions Waveform and others Adjusting procedure/conditions Waveform and others lo. Adjusting point Warm up the unit for longer than 1. Receive the E-5CH (monoscope pattern) signal. 1 VCO adjust- 1. Disconnect the antenna from the tuner antenna adjustment: 2.

  • Page 7: Purity Adjustment

    PURITY ADJUSTMENT CONVERGENCE ADJUSTMENT Waveform and others Waveform and others o. j Adiustina Purity 1. Using the remote controller, make the screen colour 1. Receive the E-2CH (crosshatch pattern) signal. adjustment green-only. Adjust the contrast control to have a beam 2.
  • Page 8 CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT (Continued) So. Adjusting point Adjusting procedure/conditions Waveform and others lo. Adjusting point Adjusting procedure/conditions Waveform and others CRT cut-off 1. Receive the E-5CH (monoscope pattern) signal. First of all, make sure that the service mode: 2.
  • Page 9 HORIZONTAL AND VERTICAL CIRCUIT ADJUSTMENT PAL CHROMA ADJUSTMENT Waveform and others lo. 1 Adlustina ooint 1 Waveform and others o. Adjusting point Adjusting procedure/conditions V-AMP 50 1. Adjust the overscan to 9% (E-5). The selected channels in paren- 1. Receive the E-l 2CH (PAL colour bar) signal. theses have the following signals.
  • Page 10 PROTECTOR PERFORMANCE CHECK Waveform and others lo. Adjusting point Adjusting procedure/conditions Waveform and others lo. Adjusting point Adjusting procedure/conditions 1. Receive the EdCH (monoscope pattern) signal. Short-circuit any of the Q851 1 SECAM b l a c k 1 Beam protec- 0852 and 0853.
  • Page 11 FUNCTION CHECK (VIDEO AND AUDIO) FUNCTION CHECK (VIDEO AND AUDIO) (Continued) Adjusting procedure/conditions Waveform and others Waveform and others o. Adjusting point lo. IAdiustina uointl 1. Receive the E-l 2CH PAL colour bar signal. Us- CONTRAST 1. Receive the E-5CH signal. SYSTEM key 2.
  • Page 12 MEMORY MAP DATA FACTORY REMARKS I I SElTlNG I Other than $22 initialization judgment data “22” Other than $29 Initialization judgment data “29” Other than $13 Initialization iudament data “13’ Initialization iudament data “48” I 004 I I 007 I I 008 I 013 I data (upper)
  • Page 13 DATA FACTORY ADDRESS SETTING 13-2...
  • Page 14 I SUB I . ~- DATA FACTORY DATA FACTORY REMARKS ADDRESS CRITERIA CRITERIA SETTING SETTING SKIP SKIP ON 1 :ON BLUE BACKGROUND 1 One-digit/two-digit LANGUAGE - - - F - - - LAST CONTRkT - - - r - - - LAST COLOUR LAST BRIGHTNESS LAST TINT...
  • Page 15 DATA FACTORY REMARKS CRITERIA SETTING AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEOSYSTEM...
  • Page 16 DATA DATA . - - - - - - REMARKS CRITERIA AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM AUDIO SYSTEM VIDEO SYSTEM FIELD ID SW must be changed from 00 to 01. With the RH-iX2938CEN2, there is no need to change the initial setting.

  • Page 17: Trouble Shooting Table

    TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) NO RASTER CIRCUITS TO BE CHECKED: NO PICTURE, NO SOUN Tuner. Check F701. Blown out. Automatic Gain Control. Does the noise level increase at max. Replace the fuse. No snow noise. received. Check pin (1) of T701 voltage The fuse is again blown out.
  • Page 18 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION Is some colour produced in CIRCUIT TO BE CHECKED: Sync. Separator Circuit. - - - - - - - ---_-__ Check IC801 and Q401. - - - - - - - - - - - - - - - I adjusted ? , R811, D801, D802, D803, 1 - - - - - - - - - - - - - - -...

  • Page 19: Solid State Device Base Diagram

    SOLID STATE DEVICE BASE DIAGRAM TOP VIEW 8 - 5 SIDE VIEW COLLECTOR - BASE 1 2 3 3 2 1 COLLECTOR ANODE 1 2 3 2582586...

  • Page 20: Chassis Layout

    MODEL CX-34G3 CHASSIS LAYOUT 3 4 0 3 3 4 0 2 I C60.2 1 C60 4 4 0 5 R F ACC 4 4 0 4 N O R I c202 5 4 0 1 , ///, TUNER [ A U D I O...
  • Page 21 5 1 0 0 4 5 4 0 2 5 1 0 0 5 VIDEO A UD I O CRT UNIT VIDEO O U T...

  • Page 22: Waveforms

    WAVEFORMS 1.3 Vp-p (H) 1.5 Vp-p (H) 3.0 Vp-p (H) 5 3.0 145 Vp-p (H) 1000 Vp-p (H)
  • Page 23 Tuner NOTE: The parts here shown are supplied as an assembly but not independently. Infrared Remote Control Unit NOTE: The parts here shown are supplied as an assembly but not independently. 0 3 0 0 1...

  • Page 24: Description Of Schematic Diagram

    SCHEMATIC DIAGRAM NOTES: PARTS SINKS SHOULD 2. SEMICOND CTOR HEAT BE REGARDED AS 2. All resisfors are I/B watt, unless otherwise noted. WHEN THE capacitors CHASSIS IS OP- 3. All are pF; unless therwise noted. (P = ppF). ERATING. VOLTAGE MEASUREMENT CONDITIONS: IMPORTA TY NOTICE: 1.
  • Page 25 B (CRT UNIT) (MAIN UNIT)
  • Page 27 MODEL CX-51 G3 SCHEMATIC DIAGRAM...
  • Page 29 AUDIO-IN VIDEO-IN ____ AUDIO-OUT -- ______ VIDEO-OUT v-,...
  • Page 30 LINE FILTER I l-4 I E R CLIP H-DRIVE H-OUT...

  • Page 31: Block Diagram

    MODEL CX-51 G3 BLOCK DIAGRAM SPOT I I I , AUDIO-IN VIDEO-I,, AUDIO-OUT VIDEO-C...
  • Page 32 G L E D D R . - - - - - - - - - LINE FILTER I 1 1 , 1 8 LINE FILTER RECTIFIER CLIP I i- VIDEO IN VIDEO-IN AUDIO-OUT VIDEO-OUT...

  • Page 33: Printed Wiring Board Assemblies

    PRINTED WIRING BOARD ASSEMBLIES (All the PWBs here are shown as viewed from their wiring sides)
  • Page 34 3463 CRT Socket Unit...

  • Page 35: Replacement Parts List

    3. PART NO. 4. DESCRIPTION 5. CODE 6. QUANTITY MARK Jr: SPARE PARTS-DELIVERY SECTION Ref. No. Part No. Description Code PICTURE TUBE MODEL CX-34G3 TRANSISTORS MODEL CX-51 G3 (with DY) PRINTED WIRING BOARD ASSEMBLIES (NOT REPLECEMENT MODEL CX-34G3 MODEL CX-51G3 DIODES...
  • Page 36 Code Part No. Description Code Ref. No. Description Part No. Ref. No. PACKAGED CIRCUITS MAIN UNIT(Continued) COILS AND TRANSFORMERS 0611 0701 0705 0 8 0 2 RH-DX0475CEZZ 0 8 0 3 RH-DX0475CEZZ CONTROLS CAPACITORS Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic...
  • Page 37 Code Description Ref. No. Part No. Description Code Part No. Ref. No. MAIN UNIT(Continued) Ceramic Mylar Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Ceramic Mylar Electrolytic Ceramic Ceramic Mylar Mylar Electrolytic Ceramic Electrolytic Electrolytic Mylar Mylar Mylar Electrolytic Mylar Ceramic Mylar Ceramic...
  • Page 38 Code Description Code Ref. No. Part No. Description Ref. No. Part No. MAIN UNIT(Continued) 0 . 0 1 1 OOV Electrolytic 1 OV Electrolytic 1 OV Electrolytic Cl 618 Cl 019 VCCSPAl HL680J RESISTORS...
  • Page 39 Description Code Description Code Ref. No. Part No. Ref. No. Part No. MAIN UNIT(Continued) See Controls Metal Oxide Metal Oxide Metal Oxide Metal Film Cement...
  • Page 40 Ref. No. Part No. Description Code Code Part No. Description Ref. No. Carbon MAIN UNIT(Continued) Carbon Cement Cement Metal Oxide Metal Oxide Metal Film Metal Film Metal Oxide AA Metal Film Carbon Carbon Carbon Metal Oxide Metal Film Carbon See Controls Metal Film Metal Film Metal Oxide...
  • Page 41 Code Description Part No. Code Ref. No. Description Ref. No. Part No. MAIN UNIT(Continued) 1 l8W Carbon SWITCHES MISCELLANEOUS PARTS Bead 1 f2W Carbon 1 l2W Carbon...
  • Page 42 Description Code Ref. No. Part No. Description Code Ref. No. Part No. MAIN UNIT(Continued) CRT SOCKET UNIT TRANSISTORS DIODES COIL CAPACITORS RESISTORS Carbon Carbon Carbon Carbon Carbon Carbon Carbon Metal Oxide Carbon...
  • Page 43 Part No. Description Code Part No. Description Code Ref. No. Ref. No. CRT SOCKET UNIT(Continued) MISCELLANEOUS PARTS Carbon Carbon Carbon Metal Oxide Carbon Metal Oxide Carbon Carbon Carbon Carbon 1 l8W Carbon Carbon Carbon MISCELLANEOUS PARTS...

  • Page 44: Packing Parts

    Ref. No. Description Code Description Code Part No. Part No. Ref. No. PACKING PARTS MISCELLANEOUS PARTS (NOT REPLACEMENT ITEM) MODEL CX-34G3 MODEL CX-51 G3 SUPPLIED ACCESSORIES ACCESSORIES ACCESSORIES (NOT REPLACEMENT ITEM)

  • Page 45: Cabinet Parts

    Code Description Part No. Description Code Ref. No. Ref. No. Part No. CABINET PARTS CABINET PARTS (MODEL CX-51 G3) (MODEL CX-34G3) Front Cabinet Ass’y Not Available l - l Not Available l - l Rear Cabinet...
  • Page 46 S H A R P COPYRIGHT 0 1997 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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