If Inverter Pcb Power Is Not Supplied - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지95 in
TROUBLESHOOTING

4-2-14. 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
Yes
Is the fuse on AC
110V/220V down?
No
Is 110V/220V
No
applied between both end of PCB
inverter CN101 "1" and
CN102 "3"?
Yes
Yes
Is the fuse on MAIN
PCB down?
No
Is DC 300V No
applied between both ends of
BD1+,-?
Yes
Is DC300V
No
applied to HYBRID
IC #10 PIN?
Yes
Is DC15V No
applied to HYBRID
IC #1 PIN?
Yes
No
Is 5V applied to C106?
Yes
Is there any No
PCB soldering short or
breakage?
Yes
Normal
95
- See the operations and
reference in this manual
when check the MAIN PCB.
Replace FUSE & check the root cause
Check the wire connection
Replace FUSE - 250V 6.3A
Check PCB PATTERN & Replace BD1
Replace PCB ASS' Y
1) Replace HYBRID IC(IC3:BP5047B15)
2) Replace PCB ASS' Y
Replace REG1 (KA78L05)
Replace PCB ASS' Y