LG LST-5600A Service Manual page 41

6. AUDIO TROUBLESHOOTING
(6) No SPDIF for External Audio
External Audio is OK?
ATSC SPDIF is OK?
Analog audio is input to IC701(35, 36)?
18.432MHz clock is output from
IC701(57)? Fig.07
Data pulse is output from IC701(5)?
YES
YES YES
YES YES
YES YES
NO
NO
NO
NO
NO
3-37
Go back to symptom $5
Go back to symptom #3
Go back to symptom #6
Check IC701.
Check IC701.