LG BD370 - Audio (S;Pdif, Optical)

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6. AUDIO (S/PDIF, OPTICAL)
ELECTRICAL TROUBLESHOOTING GUIDE
No Audio
S/PDIF, OPTICAL
audio out OK
IC204 Check
JK903 Red
Lighting OK?
C917
Digital Audio
output OK?
JK903 (Pin2)
+5.0V OK?
NO
NO
NO
YES
JK903 Re-soldering
IC301 Check
YES
YES