JVC LT-32A200 Service Manual
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SERVICE MANUAL
7 S ERVICE MANUAL
YA712<Rev.002>
2009
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.
(See illustration).
Use the service manual that
matches the version of the TV.
COPYRIGHT © 2009 Victor Company of Japan, Limited
1
Precaution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
Specific Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
LCD TELEVISION
LT-32A200
MODEL NAME
LT-32A200
TABLE OF CONTENTS
COPYRIGHT © 2009 Victor Company of Japan, Limited
/AK
MODEL NO.
RATING LABEL (REAR)
HIGH DEFINITION TELEVISION
VERSION
AK
No.YA712<Rev.002>
2009/8
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Table of Contents
Related Manuals for JVC LT-32A200
Summary of Contents for JVC LT-32A200
- Page 1 SERVICE MANUAL LCD TELEVISION YA712<Rev.002> 2009 7 S ERVICE MANUAL LT-32A200 HIGH DEFINITION TELEVISION There may be multiple versions of VERSION this TV model. MODEL NO. The TV version is identified by the letters next to the model number MODEL NAME on the TV's Rating.
- Page 2 SPECIFICATION Items Contents Dimensions ( W × H × D ) 76.0 cm × 56.3 cm × 23.4 cm (30.0" × 22.2" × 9.3") [with stand] 76.0 cm × 51.93 cm × 11.35 cm (30.0" × 20.5" × 4.5") [without stand] Mass 9.3 kg (20.6 lbs) [with stand] 8.8 kg (19.5 lbs) [without stand]...
- Page 3 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,...
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Page 4: Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS HOW TO IDENTIFY THE TRANS INVERTER 2.2.2 PB (LEAD) FREE SOLDER Pb free mark will be found on PCBs which use Pb free When you replace one of the below Trans Inverters on INVERT- solder. (Refer to figure.) For PCBs with Pb free mark, be sure ER PWB, please replace with the one that has same parts num- to use Pb free solder. - Page 5 2.2.3 HOW TO REMOVE / INSTALL FLAT PACK-IC WITH SOLDERING IRON: (1) Using desoldering braid, remove the solder from all pins 2.2.3.1 REMOVAL of the flat pack-IC. When you use solder flux which is WITH HOT-AIR FLAT PACK-IC DESOLDERING MACHINE: applied to all pins of the flat pack-IC, you can remove it (1) Prepare the hot-air flat pack-IC desoldering machine, easily.
- Page 6 2.2.3.2 INSTALLATION WITH IRON WIRE: (1) Using desoldering braid, remove the solder from the foil of (1) Using desoldering braid, remove the solder from all pins each pin of the flat pack-IC on the PWB so you can install of the flat pack-IC. When you use solder flux which is a replacement flat pack-IC more easily.
- Page 7 2.2.4 INSTRUCTIONS HANDLING SEMI- CONDUCTORS Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 2.2.4.1 Ground for Human Body Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.
- Page 8 SECTION 3 DISASSEMBLY Disassembly Flowchart Removal This flowchart indicates the disassembly steps for the cabinet Step/ parts, and the CBA in order to gain access to item(s) to be ser- Remove/*Unhook/ Loc. Part viced. When reassembling, follow the steps in reverse order. Fig.
- Page 9 (S-2) (S-4) [2] Rear Cabinet (S-4) (S-2) (S-3) (S-4) (S-2) (S-2) [1] Stand Assembly Fig. D1 (S-1) (No.YA712<Rev.002>)1-9...
- Page 10 [3] Inverter CBA (S-5) (S-5) (S-7) [4] Jack CBA (S-11) (S-6) (S-7) Shield Box (S-7) [5] Power Supply CBA (S-9) [7] Digital Main (S-10) CBA Unit (S-9) (S-8) [6] Jack Holder Fig. D2 1-10 (No.YA712<Rev.002>)
- Page 11 [14] Front Cabinet [13] LCD Module Assembly (S-12) Hook [9] Speaker [8] Speaker Holder (R) (S-15) [10] Junction [12] Function CBA (S-14) (S-12) Hook [11] IR Sensor CBA [9] Speaker (S-13) [8] Speaker Holder (L) Fig. D3 (No.YA712<Rev.002>)1-11...
- Page 12 SECTION 4 ADJUSTMENT GENERAL NOTE: "PWB" IS ABBREVIATION FOR PURITY CHECK MODE "CIRCUIT BOARD ASSEMBLY." This mode cycles through full-screen displays of red, green, blue, NOTE: and white to check for non-active pixels. Electrical adjustments are required after replacing circuit com- (1) Enter the Service mode.
- Page 13 VCOM ADJUSTMENT WHITE BALANCE ADJUSTMENT The white balance adjustment should be performed when Test Point Adj. Point replacing the LCD Panel or Digital PWB. Purpose: To mix red, green and blue beams correctly for pure [CHANNEL UP/DOWN ] white. Screen buttons Symptom of Misadjustment: White becomes bluish or reddish.
- Page 14 HOW TO INITIALIZE THE LCD TV/DVD Software Upgrade The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to Software upgrade in progress. Please wait. select a language and program channels after the set has been Do not remove the USB device or turn the TV off initialized.
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Page 15: Troubleshooting
SECTION 5 TROUBLESHOOTING Power Supply Section FLOW CHART NO.1 The power cannot be turned on. Is the fuse (F601) normal? See FLOW CHART No.2 <The fuse blows out.> Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (C605, D601, D602, D603, D604, Q601, Q602, T601) Is the AL+33V line voltage normal? - Page 16 FLOW CHART NO.6 LCD+24.5V is not output. FLOW CHART NO.7 LCD+16V is not output. FLOW CHART NO.8 INV+16V is not output. FLOW CHART NO.9 P-ON+7V is not output. 1-16 (No.YA712<Rev.002>)
- Page 17 FLOW CHART NO.10 P-ON+5V is not output. (LCD+16V is outputted normally.) Replace Q641 and Q643. FLOW CHART NO.11 P-ON+5V(TUNER+5V) is not output. (LCD+16V is outputted normally.) Replace Q641 and Q643(Q640). FLOW CHART NO.12 AL+13V(M+13V) is not output. Is approximately +13V voltage supplied to the cathode of D641 and D642? FLOW CHART NO.13 P-ON+3V is not output.
- Page 18 FLOW CHART NO.14 P-ON+3.3V is not output. FLOW CHART NO.15 P-ON+9V is not output. (LCD+16V is outputted normally.) Replace Q642. FLOW CHART NO.16 AL+3.3V is not output. FLOW CHART NO.17 LCD-6.8V is not output. Replace Q211. 1-18 (No.YA712<Rev.002>)
- Page 19 Video Signal Section FLOW CHART NO.1 The key operation is not functioning. Re-install the switches (SW101A, SW103A~SW107A) correctly or replace the poor switch. Check the switches (SW101A, SW103A~SW107A) and their periphery, and service it if defective. Replace Digital Main PWB Unit. FLOW CHART NO.2 No operation is possible from the remote control unit.
- Page 20 FLOW CHART NO.4 Picture does not appear normally.(Tuner input) FLOW CHART NO.5 Picture does not appear normally.(S-Video input) Pin(6): S-VIDEO-C Pin(8): S-VIDEO-Y FLOW CHART NO.6 Picture does not appear normally.(Y/Pb/Pr input) Pin(15): VIDEO-Y Pin(17): VIDEO-Pb Pin(19): VIDEO-Pr 1-20 (No.YA712<Rev.002>)
- Page 21 Audio Signal Section FLOW CHART NO.1 Audio is not outputted normally.(Audio input) Check the line between Pin(2, 15) of IC771 and input terminal(JK753, JK754), and service it if defective. Pin(6) : AMP(L)-OUT Pin(8) : AMP(R)-OUT Pin(2) : AUDIO(L)-OUT Pin(4) : AUDIO(R)-OUT CN802: SP(L) Check SP801,SP802 and their periphery circuit,...
- Page 22 FLOW CHART NO.2 Audio is not outputted normally.(Component Audio input) Check the line between Pin(4, 11) of IC771 and input terminal(JK741, JK742), and service it if defective. Pin(6) : AMP(L)-OUT Pin(8) : AMP(R)-OUT Pin(2) : AUDIO(L)-OUT Pin(4) : AUDIO(R)-OUT CN802: SP(L) Check SP801,SP802 and their periphery circuit, CN801: SP(R) and service it if defective.
- Page 23 FLOW CHART NO.3 Audio is not outputted normally.(Tuner input) Check TU301 and their periphery circuit, and service it if defective. Pin(6) : AMP(L)-OUT Pin(8) : AMP(R)-OUT Pin(2) : AUDIO(L)-OUT Pin(4) : AUDIO(R)-OUT CN802: SP(L) Check SP801,SP802 and their periphery circuit, CN801: SP(R) and service it if defective.
- Page 24 Victor Company of Japan, Limited Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA712<Rev.002>) Printed in Japan...