Samsung RF28R7201 AA Series Service Manual page 78

TROUBLESHOOTING
2) If R Sensor has trouble (check the other sensors in the same procedure)
ERROR Code
DATA1.
Temperature table
** Measuring point of resistance value according to Sensor **
R : CN20 - "9" ↔ "7"
R-DEF : CN20 - "5" ↔ "7"
F : CN20 - "10" ↔ "12"
F-DEF : CN20 - "6" ↔ "8"
Mid : CN40 - "18" ↔ "20"
Ambient : CN60 - "5" ↔ "16"
measuring resistance value
** 0Ω: Short trouble /Ω∞: Open trouble
Refer to circuit diagram in the manual
Sensor MICOM/Connector number
Connector CN20 -"9"(W/YEL) and "11" Pin(CN20)
R
from PCB typical Ground
Connector CN20 -"5"(YEL) and "7" Pin(CN20)
R-DEF
from PCB typical Ground
Connector CN20 – "10"(YEL) and "12" Pin(CN20)
F
from PCB typical Ground
Connector CN20 – "6"(BLU) and "8" Pin(CN20)
F-DEF
from PCB typical Ground
Connector CN40 – "18"(W/YEL) and "20"
Mid
Pin(CN40) from PCB typical Ground
Connector CN60 – "5"(W/BLU) and "16"
Ambient
Pin(CN60) from PCB typical Ground
Voltage measured between 4.6V ~ 0.6V.
☞ Checking method of ICE Maker/ICE Room Sensor resistance
Measuring voltage
R : IC01 MICOM #5, CN20 -"9"(W/YEL) and "11" Pin(CN20)
R-DEF : IC01 MICOM #3, CN20 -"5"(YEL) and "7" Pin(CN20)
F : IC01 MICOM #7, CN20 – "10"(YEL) and "12" Pin(CN20)
F-DEF : IC01 MICOM #6, CN20 – "6"(BLU) and "8" Pin(CN20)
Mid : IC01 MICOM #2, CN40 – "18"(W/YEL) and "20" Pin(CN40)
Ambient : IC01 MICOM #12, CN60 – "5"(W/BLU) and "16" Pin(CN60)
from PCB typical Ground part are similar.
→ Check the measure on the voltage of
Resistance, R210(R), R209(R-DEF), R224(F),
R223(F-DEF), R427(Mid), R228(Ambient) due to
the SMD MICOM
Start
Is MAIN PCB Connector
CN20 inserted correctly?
YES
Is R Sensor unit normal?
YES
Is the voltage between
MAIN PCB Connector CN20 -"9"(W/YEL) and "11"
Pin(CN20) from PCB normal?
YES
Is the input voltage of
IC01 MICOM #5 normal?
YES
No trouble with PCB and temperature sensor.
Recheck the bad contact of the connection.
78
NO
Bad contact of
connector/ insert correctly.
NO
Replace the temperature
sensor.
NO(0.6V >
Measurement < 4.6V)
Recheck the wire
connection part.
NO
Check the iced-solder, solder
bridging, disturbed solder.