When Power Is Not Applied - Samsung RF263BEAE** Service Manual

troublesHooting

4-2-7. When Power is not applied

Caution
There is Over AC 115V and DC 310V
at the Inverter PCB Power Circuit. So,
be cautious when repairing the unit or
measuring values..
- Check MAIN PCB Wire
- Check DOOR PANEL PCB
Start
Is FUSE on PCB
Down?
No
Is DC 300V
applied between both
ends of BD1+,-?
Yes
IS DC 13.2V applied
to C121?
Yes
IS DC 15V applied to
C108?
Yes
IS DC 5V applied to
C111?
Yes
IS DC 5V applied to
C118?
Yes
Does PANEL PCB work
normal?
Yes
Is there any
PCB soldering short
or breakage?
Yes
Normal
80
- To check the Inverter PCB,
refer to the Operation and
'Refer' sections in this
manual
Yes
Replace Fuse AC 250V 6.3A
No
Replace the Inverter PCB
No
Replace the Inverter PCB
No
Replace REG1(7815)
No
Replace REG2(5V LDO)
No
Replace REG3(5V LDO)
No
1) Check the wire harness
2) Replace PANEL PCB
No
Replace the Inverter PCB