Audio (Analog) - LG BD390 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

7. AUDIO (ANALOG)

No audio
IC603(Pin8)
12V OK?
YES
Q614(Pin2)
LOW?
YES
IC607
Pin6,7,8 I2S output
OK?
YES
IC607
Pin14,15 audio output
before amplifying
OK?
YES
TP633,
TP628 audio output
OK?
YES
L618, L619,
JK602(Pin2,5)
soldering OK?
YES
Audio out OK?
NO
CN701 Pin4
12V OK?
L616 Re-soldering
NO
Q617 Re-soldering
NO
IC201 Check
NO
IC607 Check
NO
IC603 Check
NO
Re-soldering
3-45
NO
YES
SMPS Check