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SERVICE MANUAL
WIDE LCD PANEL TELEVISION
8
2005
YA232
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
LT-30E45SU,
LT-30E45SJ,
LT-30E45SU
LT-30E45SU
MENU
BACK
P
PC
TV
TABLE OF CONTENTS
COPYRIGHT © 2005 Victor Company of Japan, Limited
,
/Z
/N
No.YA232
2005/8
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Summary of Contents for JVC LT-30E45SU
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Page 1: Table Of Contents
SERVICE MANUAL WIDE LCD PANEL TELEVISION YA232 2005 LT-30E45SU, LT-30E45SJ, LT-30E45SU LT-30E45SU MENU BACK TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS . - Page 2 SPECIFICATION Items Contents Dimensions ( W × H × D ) 84.7cm × 52.2cm × 26.0cm [Included stand] 84.7cm × 49.0cm × 10.2cm [TV only] Mass 14.8kg [Included stand] 13.0kg [TV only] Power Input AC100 to AC240 V, 50 Hz Power Consumption 150W (Standby: 4.0W) TV RF System...
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Page 3: Precaution
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.
- Page 5 HANDLING LCD PANEL 1.3.1 PRECAUTIONS FOR TRANSPORTATION 1.3.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL) When transporting the unit, pressure exerted on the internal LCD (1) Avoid placing the unit under direct sunlight over a panel due to improper handling (such as tossing and dropping) prolonged period of time.
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Page 6: Specific Service Instructions
If the picture is not clear or no colour appears, change the This function can change the screen size according to the current colour system to another colour system. picture aspect ratio. MAIN DIFFERENCE LIST Items LT-30E45SU LT-30E45SJ LT-30E45SU/Z LT-30E45SU/N POWER CORD EU type(2-pin) - Page 7 TECHNICAL INFORMATION 2.4.1 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 8 BASIC OPERATION OF SERVICE MODE 2.5.2 HOW TO EXIT THE SERVICE MODE Press the [MENU] key to exit the Service mode. 2.5.1 HOW TO ENTER THE SERVICE MODE (1) Press [MENU] remote control unit 2.5.3 CHANGE AND MEMORY OF SETTING VALUE simultaneously to display the MENU SCREEN.
- Page 9 2.5.5 SERVICE MODE SETTING ITEMS Setting menu Setting items Variable range Setting value display blank color brack / red / green / blue black scart prescale 0 - 127 nicam prescale 0 - 127 fm/am prescale 0 - 127 subwoofer corner 0 - 7 subwoofer level 0 - 32...
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Page 10: Disassembly
SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE NOTE: • Make sure that the power cord is disconnected from the outlet. • Pay special attention not to break or damage the parts. • When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers) makes service procedure manageable. - Page 11 REAR COVER CONTROL KNOB STAND LEFT FRAME RIGHT FRAME MAIN PWB TERMINAL BASE CONTROL BUTTON PWB AMPLIFIER PWB POWER PWB NOISE FILTER PWB FAV PWB POWER UNIT CONTROL BASE LED PWB FRONT Fig.1 (No.YA232)1-11...
- Page 12 3.1.11 REMOVING THE SPEAKER (Fig.2) • Remove the STAND. • Remove the REAR COVER. (1) Remove the 4 screws [A], then remove the SPEAKER with SPEAKER BASE. (2) Remove the 4 screws [B], then remove the SUB SPEAKER (L/R). (3) Remove the 8 screws [C], then remove the SPEAKER from the SPEAKER BASE.
- Page 13 MAIN BASE LCD PANEL UNIT SUB SPEAKER SPEAKER SPEAKER SPEAKER BASE SPEAKER BASE SUB SPEAKER FRONT PANEL FRONT Fig.2 (No.YA232)1-13...
- Page 14 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. 3.2.1 SETTINGS OF FACTORY SHIPMENT 3.2.1.1 BUTTON OPERATION 3.2.1.2...
- Page 15 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.
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Page 16: Adjustment
SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. 1-16 (No.YA232) - Page 17 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA232) Printed in Japan...