Audio (Analog) - LG BD370 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

7. AUDIO (ANALOG)

No Audio
IC603(Pin8)
12V AUDIO
OK?
YES
Q905 (Pin2)
LOW?
YES
IC903
Pin 6, 7, 8, I2S
Output OK?
YES
IC903 Pin 14,15
audio output before
Amp OK?
YES
CA907, CA908
audio output
OK?
YES
R949, R950,
JK904 (Pin2, 5)
soldering OK?
YES
Audio Output OK
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NO
CN201 (Pin4)
12V_AUDIO
OK?
R947 Re-soldering
NO
Q902 Re-soldering
NO
IC301 Check
NO
IC903 Check
NO
IC904 Check
NO
Re-soldering
3-37
NO
YES
Check SMPS
LGE Internal Use Only