LG 22MA33N, Service Manual

Page: 15 / 33

- 15 - LGE Internal Use Only
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Only for training and service purposes
3. No Video - Digital TV
Check RF Cable
Y
1. Check RF IC(L2600, L2603) Power (3.3V)
2. Check IC802 Output voltage(3.3V)
Replace IC802
Y
N
Check RF IC(IC2600) I2C Signal
SCL(R2608), SDA(R2609)
Check IC101
N
1. Check RF IC(L2604) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
Replace IC805
Y
N
N
Y
N
Y
1. Check Demodulator(L2619) Power (1.23V)
2. Check IC809 Output voltage(1.23V)
Replace IC809
1. Check Demodulator(L2621) Power (3.3V)
2. Check IC802 Output voltage(3.3V)
Replace IC802