Samsung RFG298HD Service Manual page 87

TROUBlESHOOTING
2)IceWater(F)Valve(OPTION,RFG298/296)
TypicalPCBGroundJ23JUMMPER
☞ C heckingmethodofvoltageBasedonPCB
typicalGroundJ23JUMMPER
1) C heckthevoltageofIC75#7(samevoltage
asIC01#116)
-ICEWatervalveoperating(about5V±0.5V)
BasedonPCBtypicalGroundJ23JUMMPER
2)IC75#12voltage
-ICEWatervalveWaiting(about13V±0.8V)
-ICEWatervalveoperating(about0.7V±0.5V)
3) C heckthevoltageofFridgeIceWater(F)
Valveoperating(ACvoltage)
=>ForcheckingtheRelayRy76
CN70-"5"(Red)↔CN72-"1"(Brown)
-ICEWatervalvewaiting(aboutAC0V)
-ICEWatervalveoperating(aboutAC115V±20%)
Start
Istheconfirmingsoundof
thevalveoperationheardwhen
Icemaker(Fz)testswitchpushed?
DoesMainPCBMICOM
#116havehigh(5V)output?
DoesMainPCBIC75
#12haveabout0.7V
output?
Isthecontactpointofmain
PCBRELAyRy76normal?
MAINPCBnormal
--Needtochecktheotherparts
①  C heckthewirebetweenIce
water valve↔MAINPCB
②  I cewatervalveitselfhastrouble
orbadcontactofconnector
③ Checktheconnectionhose
86
Normal(CheckIce
watervalvehose)
Checksoldering
short/ReplacePCB
Checksoldering
short/ReplacePCB
Checksoldering
short/ReplacePCB