Samsung RF195ABRS Service Manual page 42

TROUBLESHOOTING
4-2-1. If the trouble is detected by self-diagnosis
- The error of sensor will be displayed on the front of display.
When the error of sensor is detected at initial power ON, display of abnormal sensor part will blink.
- The appliance will not stop operating when the error of sensor is detected during operation of the
appliance. But normal cooling might be not operated if the appliance is operated by the emergency
operation mode. You would better to check the appliance according to the self-diagnosis of the
manual.
1) If Ice Maker Sensor has trouble
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to
Sensor **
Ice Maker : CN90 #3 → #4 measure the resistance value
** 0Ω : Short trouble / ∞Ω : Opentrouble
Refer to circuit diagram in th e manual
Sensor MICOM / Connector number
ICE Connector CN90-4(White) and REG1,
Maker Heat-Sink PCB common Ground
Voltage is measured between 4.6V ~ 0.6V
Voltage of IC10 MICOM #51 is same with the measuring
voltage of CN90-#4(White), REG1, & Heat Sink from
PCB common Ground part.
→ Check the measure on the MICOM Pin #51 or Sensor
Marking #6(R903).
☞ Checking method of Ice Maker Sensor resistance
CN90 #3(White ) ↔ #4(White)
- Compare with the temperature table after
measuring.
Start
Is Main PCB
Connector CN90 inserted
correctly?
YES
Is Ice Maker
Sensor unit normal?
YES
Is the voltage between
Main PCB Connector CN90-#4(White) and
REG1, Heat Sink normal?
YES
Is input
voltage of IC10 MICOM #51
normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connector.
☞ Checking method of Ice Maker Sensor voltage - Measure the
voltage of Sensor Check Point #6(IC10 MICOM #51) on PCB or
CN90-#4(White) ↔ REG1, Heat Sink.
-. Compare with the temperature table after measuring. Below is
the Measuring voltage of CN90-#4(White)↔ REG1, Heat Sink.
42
NO
Bad contact of connector /
Insert correctly
NO
Replace the Ice maker kit
NO (0.6V > Measurement < 4.6V)
Recheck the wire connection part
NO
Check the Cold solder joint, hort,
solder touch.
Common PCB
Ground of REG1 Heat-Sink