Trouble Shooting; No Power - Samsung SR-L677EV Service Manual

7. Trouble shooting

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

1) No power

Start
DC-Trans primary
power input?
Y
DC-Trans secondary
power input?
Y
DC 12V output
from REG102?
Y
DC 5V output
from REG1?
Y
Are wires connected to
panel securely?
Y
Panel PCB Ass'y
is OK?
Y
Exchange main PCB
N
Check wires
N
Replace DC-Trans
N
Check REG102
(MC7812)
N
Check REG1
(KA7805)
N
Check wire connection
N
Replace panel PCB
25
Reference 1
(Page. 38)