LG HB954TB Service Manual page 45

ELECTRICAL TROUBLESHOOTING GUIDE
IPOD function
YES
IPOD B/D
NO
JK3P1's pin27,
18 audio L/R
OK?
YES
NO
I/F Junction
CN3F1's pin1,3
OK?
YES
NO
MAIN B/D
CN250's pin15,17
OK?
YES
IC200's
NO
pin23,24 audio
signal OK?
YES
B
IPOD connection or
JK3P1 check
B
16p FFC cable &
connection check
26p FFC cable &
C
connection check
IC203 check
A
2-36
Tuner Function
YES
IC200's NO
pin11,12 audio
L/R OK?
YES
IC200's NO
pin42,43,44 I2S
clock OK?
YES
IC200's
NO
pin41 I2S signal
output OK?
YES
NO
IC404's
pin2,4,6,8 I2S signal
input OK?
YES
NO
IC404's
pin1 LOW?
YES
NO
IC404's pin12,
14,16,18 I2S signal
output OK?
YES
IC401's NO
pin4,6,8 I2S signal
input OK?
YES
NO
IC401's pin12,
14,16 I2S signal
output OK?
YES
NO
AMP B/D's
PN601's pin14,15,16 I2S
signal OK?
YES
NO
IC709 audio
output singnal
OK?
YES
NO
IC701 audio
output singnal
OK?
YES
AMP IC output stage &
JK701 check
Tuner(TUN01)
check & antenna
connection check
IC201 & X200 check
IC200 check
IC201 & X200 check
Micom(IC101) check
IC404 check
IC400 & IC405 &
IC406 & X400 check
IC401 check
22p FFC Cable &
CN101 & PN601
connection check
IC709 & X601 check
IC701 check