Samsung RS2530B Service Manual page 52

TROUBLE SHOOTING
2) When Refrigerator DAMPER does not operate
MICOM voltage
DOOR OPEN : 5V
DOOR CLOSE : 0V
MICOM voltage
0 5V alteration
Start
Is DAMPER in
operating conditions?
YES
Does DAMPER operates
with DOOR S/W pressed?
NO
Is DOOR S/W normal?
YES
Is voltage of MICOM
#50 normal?
YES
Is insertion of CN75 of
MAIN PCB normal?
YES
Are voltage of MICOM
Pin #44,45,46 outputed?
YES
Is DAMPER normal?
YES
Check wire assembly and connections between
Dampers
54
NO
Forced Operation/
Temp Increase
YES
DAMPER is normal
NO
Change DOOR S/W
NO
Check soldering/
Change PCB
NO
Check Connector CN75
again
NO
Check soldering/
Change PCB
NO
Change DAMPER