Samsung RB37A52N0SA [69/101] Troubleshooting

Samsung RB37A52N0SA [69/101] Troubleshooting
69
4. TROUBLESHOOTING
The unit is plugged In?
220~240V is applied
at MAIN PCB
CN70 #1 and #3?
MAIN PCB Fuse is blown?
DC310~340V is
applied at BD1+/- terminals?
DC 6.2V is applied at
TOP S/W 267VG 3 - 12?
DC 12V is applied at
CE109 terminals?
Start
Normal (Check again)
Plug in the unit
Check the wire connections
1) Replace Fuse (AC 250V 2.0A)
2) Replace PCB ASS'Y
Replace PCB ASS'Y
Replace PCB ASS'Y
Replace PCB ASS'Y
No
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Caution
There is AC220~240V or
DC310~340V at the MAIN PCB
Power Circuit. So, be cautious
when repairing the unit or
measuring values.
- When checking the MAIN
PCB, refer to the Operation
descriptions and the
"Reference" section.
4-2-6) When there is No Power (MAIN PBA)
5V is applied at
CE113 terminals?
Panel PCB operates normally?
Loads such as Relay
operate normally?
Replace PCB ASS'Y
1) Check the wire connections
2) Replace Panel PCB
1) Check Lead Wire connections
2) Replace Relay or PCB ASS'Y
No
No
No
Yes
Yes
No
- Check the connection of Door
Panel PCB
Is there PCB Short
or breakage?
1) Do Re-soldering
2) Replace PCB MAIN
Yes
Yes

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