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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. No Picture
Module
Back Light On ?
Check WLED_ENABLE high
R131
Check IC101
Replace Main Scaler IC
N N
Check Panel clock
P601(#9,10)
Check IC101
Repair Main B/D
N
Check Panel power
P601(#27,28,29,30) 12V
IC802 Output 12V
Replace IC802
N
Y
Replace T-con
Board or module
Check FFC Cable for damage
or open conductors.
Replace Cable
N
Y
Y
Y
Check LED Driver output
(P1101 #1,2,3,4,5)
Check LED Driver IC1101
Replace LED Driver IC
N
Y
3. No Video - Digital TV
Check RF Cable
Check Tuner(TU2602)
Data, CLK, SYN, VAL
Replace Tuner(TU2602)
Recheck
Y
N
1. Check Tuner(TU2602 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU2602) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
Y
N
1. Check Tuner(TU2602 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
Replace IC805
Y
N