Samsung SR-L628EV - Troubleshooting - No Power

Start
Check wires
Replace DC-Trans
Replace fuse
Check BD05 – 08
Check IC02(MC7812)
Check IC03(KA7805)
Check wire connection
Replace panel PCB
Reference 1
(Page. 38)
DC-Trans primary
power input?
DC-Trans secondary
power input?
Main PCB fuse
brown out?
Power input to IC02?
DC 12V output
from IC02?
DC 5V output
from IC03?
Measure C03
(1000M/35V)
Measure IC02
OUT voltage
Measure IC03
OUT voltage
Are wires connected to
panel securely?
Panel PCB Ass’y
is OK?
OK
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
N
N
N
28 Samsung Electronics
7. Troubleshooting
1) No power
1. Is the power cord well connected to wall outlet?
2. Refer to the reference
Precautions