LG 22MA33N Service Manual page 15

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)
Y
1. Check RF IC(L2604) Power (1.8V)
2. Check IC805 Output voltage(1.8V)
Y
1. Check Demodulator(L2619) Power (1.23V)
2. Check IC809 Output voltage(1.23V)
Y
1. Check Demodulator(L2621) Power (3.3V)
2. Check IC802 Output voltage(3.3V)
Y
Check RF IC(IC2600) I2C Signal
SCL(R2608), SDA(R2609)
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Only for training and service purposes
N
N
N
N
N
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Replace IC802
Replace IC805
Replace IC809
Replace IC802
Check IC101
LGE Internal Use Only