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LGE Internal Use Only
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. No video (Main IC Block)
Check Audio (Speaker out)
Check stand-by voltage 3.5V
P401/P402 5,7,8 pin
Check stand-by voltage 3.5V
L400,L401,ZD400,C400,C407
Replace
L400,L401,ZD400,C400,C407
Check Power connector
(24pin/28pin)
Short check
stand-by voltage 3.5V
Replace
Power board.
Check X-TAL X101
Replace X101
Check POWER ON signal
P401/P402 1 pin
Download software (Main)
Replace IC101
or Main Board
Check multi voltage 12V, 24V
P401/P402 11,12,13,14,15p : 12V
P401/P402 18,19,20,21p : 24V
Check Power connector
(24pin/28pin)
Short check
multi voltage 12V, 24V
Replace
Power board.
Check Main IC power block
IC404 : 1.5V , Q406 : 3.3V
IC403 : 1.1V
Replace IC404, Q406, IC403
Next page (Back-end block)
Audio
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
Low
Audio NG
OK
OK
OK
OK
High
Содержание 65UX340C Series
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