Samsung RS2530B - 6-2) When there is a trouble with Self Diagnosis

1) Ambient Sensor trouble => (applied to Ambient Sensor Temp type)
50
TROUBLE SHOOTING
6-2) When there is a trouble with Self Diagnosis
Change Ambient Sensor
Is Ambient Sensor
normal? (PANEL PCB)
Start
NO
YES
Connector contact trouble
/re-insertion
Is MAIN PCB (CN31)
insertion normal?
NO
YES
Short between connector Sensors
Is the connection wire between
MAIN PCB connector(CN32) and Temp Sensor
normal (PANEL PCB)?
NO
YES
Change Sensor
Is the voltage of Ambient Sensor of
MAIN PCB Connector (CN31) normal?(1-4)
NO
YES
Check soldering fault,short,
Lead Touch
Is MICOM Pin#54 input
voltage normal?
NO
(0.5V> Measured value)
(0.5V> Measured value>4.5V)
YES
Check Main/Panel PCB
again, Change
Change Temp Sensor
Is Refrigerator Temp Sensor
normal?
Start
NO
YES
Connector contact trouble
/re-insertion
Is the insertion of MAIN PCB
connector(CN30) normal?
NO
YES
Short between connector Sensors
Is the connection between
MAIN PCB connector(CN30) and Temp
Sensor(purple) normal?
NO
YES
Check soldering fault,short,
Lead Touch
Is MICOM Pin#51 input
voltage normal?
NO
YES
Change MAIN PCB
2) Refrigerator Temp Sensor trouble