2-81
2. AMP POWER SUPPLY ON SMPS BOARD
ELECTRICAL TROUBLESHOOTING GUIDE
No 14 VA.
No 31.5 V / 25 V
Power Line of MAIN PCB is short.
Power Line of MAIN or AMP PCB is short.
Is F901 normal?
Is the P-CTL normal?
Is TH901 normal?
Is the VCC (11 V ~ 25 V) supplied to IC901 pin7?
Is BD901 normal?
Is IC901 normal?
Is the VCC (11 V ~ 25 V) supplied to IC901 pin5?
Is Q902 normal?
Is D955 normal?
Replace F901. (same fuse)
Check the MICOM IC.
Replace TH901.
Is Q901 normal?
Check or replace Q901.
Replace BD901.
Replace IC901.
Is D953 normal?
Replace Q902.
Replace D955.
Check or replace D953.
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YESYES
YES
To Next Page
Loading...
Need help?
General
