LG CM2460 Service Manual page 34

ELECTRICAL TROUBLESHOOTING GUIDE
No PVDD (24.5 V)
YES
F900 normal?
YES
BD900 normal?
YES
TH900 normal?
YES
Is Vcc
(14 V ~ 26 V) supplied to
IC901 pin6?
YES
IC901 normal?
YES
D908 normal?
YES
Is there about 2.5 V
at IC903 pin1?
YES
Power line of main PCB is short.
NO
Replace F900 (Use the same fuse).
NO
Replace BD900.
NO
Replace TH900.
NO
D903 normal?
YES
Q901 base HIGH?
YES
Check or replace Q901.
NO
Replace IC901.
NO
Replace D908.
NO
Replace IC903.
3-17
Check or replace D903.
• Check P_CTRL HIGH signal from MCS.
• Check PC902.
NO
NO