LG MCS1306F - Page 59

3-32
ELECTRICAL TROUBLESHOOTING GUIDE
No AMP Output
Check soldering of CN902.
Check 3.3V & P-CTRL.
Replace ZD912, ZD913.
Replace D951, D952.
Replace D914/ Q900/ PC901.
Is the
VCC supplied to
IC911 Pin7?
ZD912, ZD913
OK ?
D951, D952
OK ?
NO
NO
NO
NO
NO
P-CTRL OK?
Q901,D904
OK?
YES
YES
YES
YES
YES