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SERVICE MANUAL
9 S ERVICE MANUAL
YA654<Rev.001>
2008
There may be multiple versions of
this TV model.
The TV version is identified by the
letters next to the model number
on the TV s Rating and Model No.
labels. (See illustration).
Use the service manual that
matches the version of the TV.
COPYRIGHT © 2008 Victor Company of Japan, Limited
No.YA590: LT-32P679
No.YA592: LT-32E479, LT-32EM49
No.YA653: LT-52P789
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
LCD FLAT TELEVISION
LT-52X579
MODEL NAME
LT-52X579
<FN3 CHASSIS LINEUP>
No.YA589: LT-42P789
No.YA593: LT-42X579, LT-42EM59
No.YA654: LT-52X579
TABLE OF CONTENTS
COPYRIGHT © 2008 Victor Company of Japan, Limited
/KA
MODEL NO.
RATING LABEL (REAR)
MODEL NO. LABEL (SIDE)
No.YA591: LT-47P789
No.YA594: LT-47X579, LT-47EM59
BASIC CHASSIS
FN3
VERSION
KAA
No.YA654<Rev.001>
2008/9
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Summary of Contents for JVC LT-52X579
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Page 1: Table Of Contents
No.YA594: LT-47X579, LT-47EM59 No.YA653: LT-52P789 No.YA654: LT-52X579 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS . - Page 2 SPECIFICATION Items Contents Dimensions ( W × H × D ) 125.8 cm × 87.57 cm × 34.57 cm (49-1/2" × 34-1/2" × 13-5/8") [with stand] 125.8 cm × 82.5 cm × 12.29 cm (49-1/2" × 32-1/2" × 4-13/16") [without stand] Mass 34.0 kg (74.8 lbs) [with stand] 29.7 kg (65.3 lbs) [without stand]...
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Page 3: Input
SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (6) 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 4 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.
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Page 5: Specific Service Instructions
1.3.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL) 1.3.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR (1) Avoid placing the unit under direct sunlight over a PARTS prolonged period of time. This may cause the optical filter Take note of the following when replacing exterior parts (REAR to deteriorate in quality and color. - Page 6 TECHNICAL INFORMATION 2.2.1 LCD PANEL This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the conventional CRT (Cathode Ray Tube), as a display unit. Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
- Page 7 2.2.2 SUB MICRO COMPUTER (CPU) FUNCTION [SIGNAL PWB: IC2501] Pin name Function Pin name Function EDID_WP Programming control for EDID ROM [Protection = H] P9_4 Not used NF_PPON Not used P9_3 Not used NF_OC Not used P9_2 Not used DET_NF Not used P9_1 Not used...
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Page 8: Disassembly
SECTION 3 DISASSEMBLY CAUTION AT DISASSEMBLY • Make sure that the power cord is disconnected from the outlet. • Pay special attention not to break or damage the parts. • Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors. •... - Page 9 STAND POWER CORD REAR COVER POWER CORD COVER TERMINAL BASE POWER PWB SIGNAL PWB BOTTOM FRAME BACK BRACKET BACK BRACKET MAIN BASE CONTROL KNOB TOP BRACKET SIDE BRACKET SW PWB TOP BRACKET LCD PANEL UNIT PANEL BRACKET LED PWB SPEAKER SIDE BRACKET PANEL BRACKET...
- Page 10 MEMORY IC REPLACEMENT • This model uses the memory IC. • This memory IC stores data for proper operation of the video and drive circuits. • When replacing, be sure to use an IC containing this (initial value) data. 3.3.1 MEMORY IC TABLE Simbol Number of pins Mounting PWB Main content of data...
- Page 11 3.3.4 SETTINGS OF FACTORY SHIPMENT 3.3.4.1 BUTTON OPERATION 3.3.4.2 REMOTE CONTROL DIRECT OPERATION Setting item Setting position Setting item Setting position POWER INPUT CHANNEL CABLE-01 CHANNEL CABLE-01 VOLUME VOLUME INPUT MUTING DISPLAY ASPECT NTSC,480i/p: Panorama 720p,1080i/p: Full SLEEP VIDEO STATUS Dynamic SOUND STATUS Speech...
- Page 12 DISPLAY SOUND Setting item Setting position Setting item Setting position Video Input Label Default Stereo Photo Viewer Interval :5 Digital Audio(ML) English Aspect Ratio NTSC,480i/p Panorama Surround 720p,1080i/p Full Sound Status Speech STEP Setting item Setting position 100Hz 330Hz 1kHz 3.3kHz 10kHz Closed Caption...
- Page 13 REPLACEMENT OF CHIP COMPONENT 3.4.1 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. 3.4.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.
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Page 14: Adjustment
SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION (1) This TV is adjusted by using REMOTE CONTROL UNIT. (2) The adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. (3) Make sure that connection is correctly made AC to AC power source. - Page 15 4.4.6 INITIAL SETTING VALUES IN THE SERVICE MODE • Perform fine-tuning based on the "initial values" using the remote control unit when in the SERVICE MODE. • The "initial 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.
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Page 16: Troubleshooting
SECTION 5 TROUBLESHOOTING SELF CHECK FUNCTIONS 5.1.1 OUTLINE This model has a self check function given below. When an abnormality has been detected, the power is turned off and the POWER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer. 5.1.2 SELF CHECK ITEMS Diagnosis Detection item...