No Power; Troubleshooting - Samsung SR-L676EV Service Manual

7. Troubleshooting

Precautions
1. Is the power cord well connected to wall outlet?
2. Refer to the reference

1) No power

Measure C03
(1000M/35V)
Measure IC02
OUT voltage
Measure IC03
OUT voltage
28
Start
DC-Trans primary
power input?
Y
DC-Trans secondary
power input?
Y
Main PCB fuse
brown out?
N
Power input to IC02?
Y
DC 12V output
from IC02?
Y
DC 5V output
from IC03?
N
Are wires connected to
panel securely?
Y
Panel PCB Ass'y
is OK?
Y
OK
N
Check wires
N
Replace DC-Trans
N
Replace fuse
N
Check BD05 – 08
N
Check IC02(MC7812)
N
Check IC03(KA7805)
N
Check wire connection
Y
Replace panel PCB
Reference 1
(Page. 38)
Samsung Electronics