LG Electronics 29LN45**-Z* (2) 29LN45*3/29LN45*B, (3) 29LN45*5

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Only for training and service purposes
(2) 29LN45*3/29LN45*B
Check RF Cable
Check Tuner(TU3702)
Data, CLK, SYN, VAL
Replace Tuner(TU3702)
Recheck
Y
N
1. Check Tuner(TU3702 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU3702) I2C Signal
SCL(R3735), SDA(R3736)
Check IC101
Y
N
1. Check Tuner(TU3702 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
Replace IC805
Y
N
(3) 29LN45*5
Check RF Cable
Check Tuner(TU2601)
Data, CLK, SYN, VAL
Replace Tuner(TU2601)
Recheck
Y
N
1. Check Tuner(TU2601 #5) Power (3.3V)
2. Check IC803 Output voltage(3.3V)
Replace IC803
Y
N
Check Tuner(TU2601) I2C Signal
SCL(R2609), SDA(R2610)
Check IC101
Y
N
1. Check Tuner(TU2601 #7) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
Replace IC805
Y
N