Read LG 32LG710H (CHASSIS:LA95A) Service Manual online
Analog RF Audio Trouble shooting guide
Check TU100 Pin13(SIF)
Can you see the normal signal?
Can you see the normal signal?
Check the input (Pin AD19) of BCM3549((IC100).
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
YES
NO
Could you measure voltage of TU100& IIC lines?
Are they all normal?
Are they all normal?
NO
You should check power line
& IIC lines.
& IIC lines.
YES
You should replace TUNER.
NO
After checking audio signal line, you should decide to replace item or not.
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