No Ntsc Audio - LG LSS-3200A Service Manual

3) NO NTSC AUDIO

ATSC & DIRECTV Audio are OK?
YES
SIF signal is input to the Base of Q302?
YES
SIF signal is input to IC701(50)?
Fig. 05
YES
Analog audio signal is output from
IC701(17, 18)?
Fig.05
NO
Go back to symptom #1 or 2
NO
NO
NO
Check IC701 and surroundings.
3-12
Check TU300
Check Q302