If Inverter Pcb Power Is Not Supplied - Samsung RFG237AA Service Manual

TROUBLESHOOTING

4-2-16. If Inverter PCB Power is not supplied

Caution
At the INVERTER PCB Power, AC
110V/220V power and over DC 300V
of high-voltage are applied. Please take
care of yourself when repair and
measure.
Start
Is the fuse on AC
110V/220V down?
No
Is 110V/220V
applied between both end of
inverter PCB CN01?
Yes
Is the fuse on MAIN
PCB down?
No
Is DC 300V
applied between both ends of
BD1+,-?
Yes
Is DC300V
applied to HYBRID
IC #10 PIN?
Yes
Is DC15V
applied to HYBRID
IC #1 PIN?
Yes
Is 5V applied to C104?
Yes
Is there any
PCB soldering short or
breakage?
Yes
Normal
94
- See the operations and
reference in this manual
when check the MAIN PCB.
Yes
Replace FUSE & check the root cause
No
Check the wire connection
Yes
Replace FUSE - 250V 5A
No
Check PCB PATTERN & Replace BD1
No
Replace PCB ASS' Y
No
1) Replace HYBRID IC(IC3:BP5047B15)
2) Replace PCB ASS' Y
No
Replace REG1 (KA78L05)
No
Replace PCB ASS' Y