Samsung RSJ1K Series Service Manual

77TROUBLE SHOOTING4-2-10) When Water Tank Heater does not operateStartMAIN PCB is normal.-- Check other parts.Check Water Tank Heater Wire.Check if the Heater is open.- Check Power Plug- Check Main Fuse (Blown)- Check Wire ConnectionsNODo Forced Operation andcheck it again with Comp on.NOCheck if IC11(S3P84E9-LOAD MICOM) #37 is 5V.If it is 0V, replace MAINPCB.NOReplace RY79 RelayNOIf it is 0 , check if Heater is short.If it is , check if there is wire-cut,Heater is open or the connector isslipped out.If it is 0 , check if Heater is short.If it is , check if there is wire-cut,Heater is open or the connector isslipped out.NONOYESYESYESYESYESYESThe refrigeratoroperates normally.Comp is operating.5V is applied at MAINPCB IC74 #6.RY79 AC terminalsare on.There is aresistance read at CN71#5and CN70 #9.The reading is15~17K .CautionBefore reading the resistances, plugout the unit. Then, plug out theconnect from MAIN PCB and readthem at the wires.