4-2-12) When Fridge Damper Does Not Work - Samsung RB31FEJNB Series Service Manual

4. TROUBLESHOOTING
4-2-13) When Fridge Damper does not work
Door & MICOM State
Door MICOM (#22)
Close 0V
Open 5V
MICOM & FRIDGE DAMPER STATE
MICOM
36 37
DAMPER
CLOSE 5V 0V
...ING 0V -
OPEN 5V 5V
* Note ; Its operations can change
based on its functions.
[Set lower than the current temp]
38 Remark
MICOM Pin #36,#37 and #38
0V
5V
0V
Start
DAMPER is under a
working condition.
Yes
Damper operates with
DOOR S/W closed.
No
DOOR S/W is good
Yes
Fridge temp satisfies
the set temp
Yes
Shift Set Temp
MAIN PCB Connector
CN75 is inserted normal
Yes
Voltage is output from
Yes
DAMPER is normal
Yes
Normal
Replace PCB MAIN
77
No
Forced Operation, Temp Increased
Yes
DAMPER is good
No
Replace DOOR S/W
No
Check Wiring & PCB MAIN
No
Check Connector CN75
No
Check Cold Solder, Replace PCB
No
Replace DAMPER