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JVC LT-Z32S2/A Service Manual
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JVC LT-Z32S2/A Service Manual

JVC LT-Z32S2/A Service Manual

Jvc wide lcd panel television
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SERVICE MANUAL
WIDE LCD PANEL TELEVISION
3
2004
YA020
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43
LT-Z32S2,
LT-Z32S2
LT-Z32S2

TABLE OF CONTENTS

COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
,
/A
/S
BASIC CHASSIS
MK
No.YA020
2004/3

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Summary of Contents for JVC LT-Z32S2/A

  • Page 1: Table Of Contents

    SERVICE MANUAL WIDE LCD PANEL TELEVISION YA020 2004 LT-Z32S2, LT-Z32S2 LT-Z32S2 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SERVICE MANUAL WIDE LCD PANEL TELEVISION YA020B 2004 LT-Z32S2S BASIC CHASSIS The following items for the LT-Z32S2S/H was changed partly from LT-Z32S2. Therefore, this service manual describes only the items which differ from those of the LT-Z32S2 service manual. For details other than those described in this manual, please refer to the LT-Z32S2 service manual (No.YA020, 2004/3).
  • Page 3 SPECIFICATION Items Contents Dimensions (W × H × D) 83.3 cm × 63.8 cm × 26.0 cm (Included stand) 83.3 cm × 56.9 cm × 9.7 cm (TV only) Mass 22.0 kg (Included stand) 19.2 kg (TV only) TV RF System B, G, I, D, K, K1, M Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43 (NTSC:EXT only).

  • Page 4: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (7) Isolation Check (Safety for Electrical Shock Hazard) many circuits and components specially for safety After re-assembling the product, always perform an purposes. For continued protection, no changes should be isolation check on the exposed metal parts of the cabinet made to the original design unless authorized in writing by (antenna terminals, video/audio input and output terminals,...
  • Page 5 INSTALLATION 1.2.1 HEAT DISSIPATION 1.2.3 INSTALLATION REQUIREMENTS If the heat dissipation vent behind this unit is blocked, cooling To ensure safety in an emergency such as an earthquake, and efficiency may deteriorate and temperature inside the unit will to prevent accidents, ensure that measures are taken to prevent rise.
  • Page 6 For storage, ensure that they are stacked in 2 layers or less even when placed upright. MAIN DIFFERENCE LIST Items LT-Z32S2 LT-Z32S2/A LT-Z32S2/S POWER CORD QMPK300-170-JC QMPG110-170-JC QMPN260-170-JC...

  • Page 7: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES 2.1.1 FUNCTION / CIRCUITS • DIST (Digital Image Scaling Technology) Employs an interpolation method that doubles the scanning lines to realize 480-line flickerfree picture making it especially suitable for reproducing high-resolution pictures even on large-screen displays. •...
  • Page 8 2.2.2 MAIN CPU PIN FUNCTION (IC001) Pin No. Pin Name Remark Pin No. Pin Name Remark I/O Data (Program ROM) I Test purpose I/O Data (Program ROM) I Test purpose I/O Data (Program ROM) I Test purpose VSS33 I GND O Test purpose VDD33 I 3.3V...
  • Page 9 2.2.3 SUB CPU PIN FUNCTION (IC7807) Pin No. Pin name Function (SYSTEM0) (SYSTEM3) AVCC Sub clock Sub clock Internal down voltage Reset [Reset : L] TEST Operation test for SUB CPU OSC2 10MHz oscillation for system clock OSC1 10MHz oscillation for system clock Not used Not used BL_D2...

  • Page 10: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE NOTE: Since this model adopts a layer structure, follow the procedure below in disassembling this model. Be careful enough not to damage or scratch parts. 3.1.1 REMOVING THE STAND 3.1.6 REMOVING THE VIDEO PWB / MI-COM & DIST (1) Remove the 2 screws [A], and remove the STAND MODULE PWB COVER.
  • Page 11 JACK COVER STAND COVER STAND JACK COVER JACK BASE VIDEO PWB SHIELD TUNER REAR COVER TUNER PWB BASE VIDEO PWB MSP PWB BRACKET RECEIVER COOLING REGULATOR VIDEO PWB BRACKET MI-COM & DIST POWER MODULE PWB TERMINAL POWER BASE CORD FRONT CONTROL POWER CORD HOLDER FRONT SENSOR PWB...
  • Page 12 3.1.9 REMOVING THE SPEAKER 3.1.10 REMOVING THE LCD PANEL UNIT • Remove the STAND. • Remove the STAND. • Remove the REAR COVER. • Remove the REAR COVER. (1) Remove the 5 screws [a], and remove the SPEAKER BOX. • Remove the POWER CORD. (2) Remove the 4 screws [b], and remove the SPEAKER (L / •...
  • Page 13 REPLACEMENT OF MEMORY IC This unit uses the nonvolatile memory IC.The memory IC memories data for video and deflection circuits. To replace the memory IC without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing the memory IC, be sure to use the IC written with the initial values of data.
  • Page 14 3.2.3.2 USER SETTINGS OF MENU Setting item Setting value Setting item Setting value POWER SOUND SETTING CHANNEL BASS Centre TREBLE Centre PRESET CHANNEL Refer to BALANCE Centre OPERATING INSTRUCTIONS SPEAKER VOLUME PICTURE SETTING 3D SOUND PICTURE MODE BRIGHT A. H. B COLOUR TEMP.
  • Page 15 3.2.3.4 SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value 1.IF 1.VCO 6.STATUS (Do not adjust) 2.ATT ON/OFF 2.V/C 1.CUT OF R 7.VNR 1.MYLV 2.CUT OF G (Do not adjust) 2.ONMVF 3.CUT OF B 3.MYCOR 4.DRIVE R 4.MYGA 5.DRIVE G 5.YEGON...
  • Page 16 REPLACEMENT OF CHIP COMPONENT 3.3.1 CAUTIONS (1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it. 3.3.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.

  • Page 17: Adjustment

    SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION MEASURING INSTRUMENT AND FIXTURES (1) Prior to the following procedure, be sure to connect the • DC voltmeter (or Digital voltmeter) receiver unit and the display unit. • Oscilloscope (2) Adjustment of many Majority of the adjustment items for •...
  • Page 18 ADJUSTMENT LOCATION & WIRING (No.YA020)1-17...
  • Page 19 SERVICE MENU SCREEN SERVICE MENU SERVICE MENU 1. IF 2. V/C 3. AUDIO 4. DD/CM 5. VSM PRESET 6. STATUS 7. VNR 8. IP 9. SHIPPING (OFF) 0. BUS FREE 1-9 : SELECT i : EXIT 1.IF 4. DD/CM IF SERVICE MENU DD/CM 1.
  • Page 20 BASIC OPERATION OF THE SERVICE MENU MODE [USING REMOTE CONTROL UNIT] 4.5.1 TOOLS OF SERVICE MENU OPERATION 4.5.5 SETTINGS OF THE SERVICE MENUS Operate the SERVICE MENU with the remote control unit. 1. IF (VCO adjustment, ATT setting) 4.5.2 HOW TO ENTER THE SERVICE MENU MODE [Do not adjust] (1) Press the [INFORMATION] key and the [MUTING] key of 2.
  • Page 21 DEFAULT VALUES IN THE SERVICE MENU SETTING MODE • Perform fine-tuning based on the "default values" using the remote control when in the SERVICE MENU setting mode. • The "default values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values.
  • Page 22 Setting value Variable Item No. Item range SECAM NTSC R GAIN 0000~0255 0255 0255 0255 (NO DISPLAY) -128~0127 0000 0000 0000 G GAIN 0000~0255 0228 0228 0228 (NO DISPLAY) -128~0127 0000 0000 0000 B GAIN 0000~0255 0220 0220 0220 (NO DISPLAY) -128~0127 0000 0000...
  • Page 23 Setting value Variable Item No. Item range SECAM NTSC (NO DISPLAY) 0000~0015 0000 0000 0000 (NO DISPLAY) 0000~0255 0000 0000 0000 (NO DISPLAY) 0000~0015 0000 0000 0000 (NO DISPLAY) 0000/0001 0001 0001 0001 (NO DISPLAY) 0000~0127 0016 0016 0016 (NO DISPLAY) 0000/0001 0000 0000...
  • Page 24 4.6.1.2 AUDIO SYSTEM Variable Item No. Item Setting value range (NO DISPLAY) 0000~0007 0001 (NO DISPLAY) 0000~0007 0001 (NO DISPLAY) 0000~0007 0001 (NO DISPLAY) 0000~0007 0000 (NO DISPLAY) 0000~0009 0003 (NO DISPLAY) 0000~0015 0004 (NO DISPLAY) 0000~0015 0006 (NO DISPLAY) 0000~0015 0003 (NO DISPLAY)
  • Page 25 4.6.3 [4.DD/CM] NOTE: For reference, initial setting values (except OSD-G/B/R) in the following conditions are written here. • Input signal : PAL/SECAM/NTSC • Picture mode : Standard • Zoom : Full • Multi screen : Single screen • Colour temp. : Normal Setting value Variable Item No.
  • Page 26 Setting value Variable Item No. Item range SECAM NTSC CMT03 (NO DISPLAY) 0000~0255 0030 0030 0020 CMT04 (NO DISPLAY) 0000~0255 0030 0030 0030 CMT05 (NO DISPLAY) 0000~0063 0059 0059 0060 CMT06 (NO DISPLAY) -128~0127 0005 0005 -002 CMT07 (NO DISPLAY) -128~0127 0002 0002...
  • Page 27 Setting value Variable Item No. Item range SECAM NTSC CMT48 (NO DISPLAY) 0000/0001 0000 0000 0000 CMT49 (NO DISPLAY) 0000/0001 0001 0001 0001 CMT50 (NO DISPLAY) 0000~0031 0021 0021 0021 CMT51 (NO DISPLAY) 0000~0031 0021 0021 0021 CMT52 (NO DISPLAY) 0000/0001 0000 0000...
  • Page 28 4.6.5 [8.IP] (*All fixed) NOTE: For reference, initial setting values in the following conditions are written here. • Input signal : PAL/SECAM/NTSC • Picture mode : Standard • Zoom : Full • Multi screen : Single screen • Colour temp. : Normal Setting value Variable Item No.
  • Page 29 Setting value Variable Item No. Item range SECAM NTSC PPB029 (NO DISPLAY) 0000~00FF 0000 0000 0000 PPB030 (NO DISPLAY) 0000~00FF 0000 0000 0000 PPB031 (NO DISPLAY) 0000~001F 0000 0000 0000 PPB032 (NO DISPLAY) 0000~00FF 0000 0000 0000 PPB033 (NO DISPLAY) 0000~00FF 0000 0000...
  • Page 30 Setting value Variable Item No. Item range SECAM NTSC ADS007 (NO DISPLAY) 0000~00FF 0096 0096 0096 ADS008 (NO DISPLAY) 0000~00FF 0020 0020 0020 ADS009 (NO DISPLAY) 0000~00FF 00FF 00FF 00FF ADS010 (NO DISPLAY) 0000~00FF 00FF 00FF 00FF ADS011 (NO DISPLAY) 0000~00FF 00FF 00FF...
  • Page 31 Setting value Variable Item No. Item range SECAM NTSC IPA016 (NO DISPLAY) 0000~003F 0007 0007 0008 IPA017 (NO DISPLAY) 0000/0001 0001 0001 0001 IPA018 (NO DISPLAY) 0000~003F 0003 0003 0015 IPA019 (NO DISPLAY) 0000/0001 0001 0001 0001 IPA020 (NO DISPLAY) 0000/0001 0001 0001...
  • Page 32 Setting value Variable Item No. Item range SECAM NTSC IPA061 (NO DISPLAY) 0000~0003 0000 0000 0000 IPA062 (NO DISPLAY) 0000~003F 000A 000A 000A IPA063 (NO DISPLAY) 0000~003F 003F 003F 003F IPA064 (NO DISPLAY) 0000~000F 0006 0006 0006 IPA065 (NO DISPLAY) 0000~0007 0001 0001...
  • Page 33 Setting value Variable Item No. Item range SECAM NTSC IPA106 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPA107 (NO DISPLAY) 0000~000F 0000 0000 0000 IPA108 (NO DISPLAY) 0000~00FF 0080 0080 0080 IPA109 (NO DISPLAY) 0000~000F 0000 0000 0000 IPA110 (NO DISPLAY) 0000~00FF 0040 0040...
  • Page 34 Setting value Variable Item No. Item range SECAM NTSC IPB001 (NO DISPLAY) 0000~00FF 0001 0001 0001 IPB002 (NO DISPLAY) 0000~00FF 0001 0001 0003 IPB003 (NO DISPLAY) 0000~000F 0000 0000 0000 IPB004 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPB005 (NO DISPLAY) 0000~000F 0000 0000...
  • Page 35 Setting value Variable Item No. Item range SECAM NTSC IPB046 (NO DISPLAY) 0000~00FF 008B 008B 008B IPB047 (NO DISPLAY) 0000~000F 0000 0000 0000 IPB048 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPB049 (NO DISPLAY) 0000~000F 0000 0000 0000 IPB050 (NO DISPLAY) 0000~00FF 000F 000F...
  • Page 36 Setting value Variable Item No. Item range SECAM NTSC IPC001 (NO DISPLAY) 0000~0003 0002 0002 0002 IPC002 (NO DISPLAY) 0000~00FF 00EA 00EA 00EA IPC003 (NO DISPLAY) 0000/0001 0000 0000 0000 IPC004 (NO DISPLAY) 0000/0001 0000 0000 0000 IPC005 (NO DISPLAY) 0000~000F 0000 0000...
  • Page 37 Setting value Variable Item No. Item range SECAM NTSC IPD001 (NO DISPLAY) 0000~00FF 0040 0040 0040 IPD002 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPD003 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPD004 (NO DISPLAY) 0000~0007 0000 0000 0000 IPD005 (NO DISPLAY) 0000~00FF 0000 0000...
  • Page 38 Setting value Variable Item No. Item range SECAM NTSC IPD046 (NO DISPLAY) 0000/0001 0000 0000 0000 IPD047 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPD048 (NO DISPLAY) 0000~00FF 0000 0000 0000 IPD049 (NO DISPLAY) 0000~00FF 0090 0090 0090 IPD050 (NO DISPLAY) 0000~0007 0000 0000...
  • Page 39 ADJUSTMENT PROCEDURE 4.7.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument VCO (AFC) Remote control [1.IF] (1) Receive a PAL colour bar signal. check unit 1.VCO(CW) (2) Select "1. IF" from the SERVICE MENU. (3) Select "1. VCO." Signal generator (4) Make sure that an arrow of "MAIN"...
  • Page 40 Measuring Item Test point Adjustment part Description instrument Remote control [2. V/C] (1) Receive a PAL black and white pattern signal CONTRAST unit 10. CONT (colour off). (Contrast) (2) Select "2. V/C" from the SERVICE MENU. Signal generator (3) Adjust < 10. CONT > (Contrast) to set the white part to be white.
  • Page 41 Measuring Item Test point Adjustment part Description instrument PAL/SECAM/ Remote control [2.V/C] - PAL COLOUR - NTSC unit 13. COLOUR (1) Receive a PAL colour bar signal (full field colour SUB COLOUR (Colour) bar). Signal generator (2) Select "2. V/C" from the SERVICE MENU. (3) Adjust <...
  • Page 42 Measuring Item Test point Adjustment part Description instrument SUB-SCREEN Remote control [2. V/C] (1) Receive a PAL black and white pattern signal A-D OFFSET unit 7. TWN HI R (including 0% black signal). (Sub-screen high (2) Select "2. V/C" from the SERVICE MENU. Signal generator light red) (3) Adjust <...
  • Page 43 Measuring Item Test point Adjustment part Description instrument PAL/SECAM/ Remote control [2. V/C] - SUB-SCREEN PAL COLOUR - NTSC unit 16. TWN COL (1) Receive a PAL colour bar signal (full field colour SUB-SCREEN (Sub-screen bar). COLOUR Signal generator colour) (2) Select "2.

  • Page 44: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.YA020)1-43...
  • Page 45 1-44 (No.YA020)
  • Page 46 (No.YA020)1-45...
  • Page 47 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan (No.YA020) Printed in Japan...

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