Samsung RF267ABRS Service Manual

Contents

78TROUBLESHOOTING4-2-11. When refrigerator ROOM Lamp does not light up1. When you replace the lamp of freezer, please power OFF to avoid an electric shock.2. Please keep in mind you could get burnt by the excessive heating of an incandescent light bulb.3. Bimetal is installed in the refrigerator LAMP. Check that if LAMP may be OFF by bimetal. The case of fresh food compartment(room) lamp will be explained only.Because it is possible to repair the other room lamps with the same method.StartIs the inside lampfilament cut?Is Lamp OFF bybimetal operating?Is the connectionpoint of R-door switchnormal?Is the control relayof the inside lamp in PCBnormal?(RY76)Repair the inside lampFresh food compartmentLamp is applied only.Repair door switchReplace PCB andReplace RelayCheck the connection of RDoorswitch and repair the inside lampsocketReference* The interior lamp relay operates lighting/lightoutaccording to door open / close.* If interior lamp does not light, check the noise of relayoperation.* Noise of relay operation sounds every Door Open /Close.* F-LAMP Relay -- RY75* R-LAMP Relay -- RY76ReferenceIf the door is opened, the contact of door switch will be opened and MICOM will get applied 5V to finally sense Open.If 5V has been sensed over two minutes afterwards, Door-Open alarm will soundrDing-Dongsfor 10 seconds in a oneminute cycle. Forthat reason, if the door switch has failure, the refrigerator can make atDing-Dongusound per a oneminute cycle. Please note the stepfor its service.Wait for returning timeof bimetaló When measure lamp resistance to the Wireª Resistance can be changed by Lamp input voltage.(Actual measurement is below, it can be changed byperformance)ó Checking method of Door Switch voltage- Measuring voltage of Sensor Check Point #5(IC01 MICOM #58) onPCB or CN30#8(White-black) ® CN75#1(Gray)- Compare time table after measuringMeasuring voltage of CN30#8(white-black)®CN75#1(Gray) are belowó Fresh foodcompartment lampCN70#1(Red) ®CN71#1 (Blue) ;10(33)Ohm3 OhmLamp ; 60W + 60Wó Fresh foodcompartment lampCN70#1(Red) ®CN71#3 (Gray) ;15(66)Ohm5 OhmLamp ; 60Wtypical PCB Ground CN10#3"(Black)Door & MICOM StateDoorFMICOM(#50)CloseOpen5V(High)0V(Low)0V(Low)5V(High)R MICOM(#3)Right and Left