Samsung SR-688EV - Failure Diagnosis and Repairment; Main PCB Inspection

22 Samsung Electronics
9-2 Self diagnosis failure
1) Outer temperature sensor failure
2) R1, R2, refrigerator temp. sensor failure
Is main PCB connection
(CON 5) O.K. ?
Is outertemp sensor O.K.
Is input vltg of CON 05
pin2 O.K.
Change main PCB ass’ y
Connection failure
Change sensor
Wire open
Start
Is temp. sensor O.K. ?
Is main PCB connection
(CON02) O.K. ?
Is input vltg of CON 02
pin1,2 O.K.
Is input vltg of CON 02
pin1,2 O.K.
Change main PCB ass’ y
Change sensor
Connection failure
Connection between sensors open
Wire open
Start
N
Y
N
N
Y
N
Y
N
Y
N
Y
N
Y