LG RAT375 - Micom Part Check I

3-2
No PVDD
YES
Is F901 normal? Replace F901 (Use the same fuse).
YES
NO
Is BD901 normal? Replace BD901.
YES
NO
Is TH902 normal? Replace TH902.
YES
YES
NO
Is Vcc
(10 V ~ 18 V) supplied to
IC902 Pin7?
Is D905 normal?
YES
NO
Check or replace D905.
• Check the power CTL "H" signal from μ-COM.
• Check PC902.
Is Q902 normal? Replace Q902.
Check or replace Q910.
YES
NO
Is D929 normal? Replace D929.
YES
NO
Is there about 2.5 V
at IC904 Pin1?
Replace IC904.
YES
NO
Is Q910 base "H"?
Power line of main PCB is short.
NO
NO