84TROUBlESHOOTING4-2-12.WhenrefrigeratorROOMLampdoesnotlightupWhencontrollingtheregrigeratorlightwithRegulator(12V):LEDLAMP→ApplyingtotheF/RRoomcompartment(Option)*IftheVegetableLampdoesnotworkproperly,checktheRcompartmentLEDLampbecauseitisconnectedwiththeRcompartmentLEDLampinparallel.Refertothecircuitdiagramtorepair.StartCheck/ReplaceREEDS/W,MagnetASS`yDoestheDOORS/Wsenseproperly?(Open/Close)NoReplace/RepairthePCBNoReplace/RepairthePCB.RepairIC76NoChecktheconnectorterminalReplacePCBNoChecktheconnector terminalNoReplaceLEDLAMPNormal1)Measuringoutputvoltage-MeasuringthevoltageofPCBtypicalGroundJ23JUMMPERandIC76voltage(CN78-"3"(Red)/RLED),IC77voltage(CN78-"1"(Brown)/FLED)CheckingmethodofDoorswitchvoltage.-MeasuringvoltageofCN76-"12")(Purple) ↔ PCBtypicalGroundJ23JUMMPERPCBTypicalGroundJ23JUMMPERRLEDLampON CloseNoCheckthewireRe-inserttheconnectorNoyesyesyesyesyesyesyesIstheoutputvoltageofIC01MICOM#28normal?IstheoutputvoltageofIC76normal?IstheMAINPCBconnector(CN78)insertedproperly?DoestheMAINPCBconnector(CN78)outputproperly?(11~12V)IstheLEDLAMPconnectedproperly?IstheLEDLAMPnomal?RLEDLampOFOpenDoor&MICOMStateCloseOpenMICOM(#28)RightandLeft0V(Low)5V(High)MICOMStateDoor(RightandLeft)CloseOpenR#280V(Low)5V(High)F#295V(High)0V(Low)IC76(R)/IC77(F)StateIC76(R)/IC77(F)0V(Low)11~12V(High)Micom0V(Low)5V(High)Door
