Samsung RF23HT Series Service Manual page 102

TROUBLESHOOTING
2) Ice Water(F) Valve
Typical PCB Ground REG1-GND
☞ Checking method of voltage Based on PCB
typical Ground REG1-GND
1) Check the voltage of IC75 -"5"(same voltage
as IC01 #80)
- ICE Water valve operating (about 5V±0.5V)
Based on PCB typical Ground REG1-GND
2) IC75 -"12" voltage
- ICE Water valve Waiting (about 13V±0.8V)
- ICE Water valve operating (about 0.7V±0.5V)
3) Check the voltage of Fridge Ice Water(F)
Valve operating(AC voltage)
=> For checking the Relay RY76
CN70-"5"(Red) ↔ CN72-"1"(Brown)
- ICE Water valve waiting (about AC 0V)
- ICE Water valve operating (about AC 115V± 20%)
Start
Is the confirming sound of
the valve operation heard when
Ice maker(FZ) test switch pushed?
Does Main PCB MICOM
#80 have high (5V)output?
Does Main PCB IC75
#12 have about 0.7V
output?
Is the contact point of main
PCB RELAY RY76 normal?
MAIN PCB normal
-- Need to check the other parts
① Check the wire between Ice
water valve↔MAIN PCB
② Ice water valve itself has trouble
or bad contact of connector
③ Check the connection hose
102
Normal(Check Ice
water valve hose)
Check soldering
short/Replace PCB
Check soldering
short/Replace PCB
Check soldering
short/Replace PCB