Samsung RF23HT Series Service Manual

99TROUBLESHOOTING4-2-12. If Pantry Panel PCB is not working normallyYou should check the display after door opening because the display of this model operates onlywhen the fresh food compartment door is opened.Is theconnector of pantry roominserted correctlyIs MAIN PCBConnector (CN51) insertedcorrectly?Is signal of MAINPCB CN51 normal?Is the lightingoperated when replace PantryPanel-PCB?Reinsert connector in MAIN PCBStartDoes R roomDoor switchoperate normally?Is a key pressedcontinuously?Is the PCB systemstill operated by separatingof the mechanism?Is the lighting operatedafter replacing the PantryPanel-PCB?Is a normal voltageoutputted from MAIN PCB IC51during the key operating?Check and repair the switch* Refer to Reinsert Connector, Repair bad contactCheck voltage/Replace MAIN PCBPanel PCB itself has trouble.Reassemble PCB ASS'Y / Enforcethe cancelation of pressed keysReassemble PCB ASS'Y /Enforce the cancelation of pressedkeysConvertible compartment PanelPCB itself has trouble.① Replace MAIN PCB② Check the short of MAINPanel wire① Check the wires of Pantry Room - disconnection, short between wires② Recheck the control circuit of MAIN PCB Pantry Panel③ Check the wire assembling between Panel and MAIN① Check the wire of Pantry Room - disconnection, short betweenwires② Check the short/open of the pantry panel lighting circuit inMAIN PCB.② If Panel PCB Key is not selected※ If it is not repaired with the above basic checking methodIf Panel Key is notselected☞ Checking method of voltage Based on PCB typicalGround REG1-GND1) Key voltage ; CN51-"11"(Sky Blue)a) Working: 2V±0.5V b) Normal: 0VPCB Typical Ground REG1-GNDThe Voltage of KEY isWorking every 2msec/4min