Audio Check - LG HB954WA Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
6. NO AUDIO CHECK
CD/DVD/BD Disc
or USB play
YES
IC403's pin4,6,
8,17 I2S signal
input OK?
YES
IC403's
pin1 LOW?
YES
IC403's pin3,
12,14,16 I2S signal
output OK?
YES
A
When
OPTICAL function
YES
IC201's
pin6 audio signal
OK?
YES
C
NO
IC500 check
NO
Micom(IC101) check
IC403 check
NO
JK203 check
AUX function
YES
IC200's
pin9,10 audio
L/R OK?
YES
B
Portable function
YES
IC200's
pin7,8 audio
L/R OK?
YES
B
Coaxial function
YES
IC201's
pin1 audio signal
OK
YES
C
2-35
NO
JK251 check
NO
JK201 check
NO
JK203 check