Samsung NV51K6650D Service Manual page 38

4. Troubleshooting
4-1 Failure Display Codes
"C-d1"
* Disconnect power.
* Disconnect harness connected to Lock motor
* Check micro switch
(com-NC=>closed, when door is unlocked.)
* Measure resistance of Lock motor
Coil.(1750~1850Ω at the room temperature)
* Check oven sensor
(See page 29)
Ok
*Check if voltage is present at the lock motor terminals
allowing it to operate.
Ok
*Check whether harness connected normally into CN201
of main PCB.
*Measure resistance of Cn201 on Main PCB.
(COM-NO: ∞ at the room temperature)
*COM : black color
*NO : yellow color
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No
No
38
* Replace micro switch or Lock motor.
END
Wall Main PCB
No
CN201
New FM PCB
* Repair damaged harness or
replace
* Replace main PCB.
No
* re-solder damaged paths or
broken contacts .
END