IfPantryPanelPcbIsNotWorkingNormally; IfPantryPanelPcbIsNotWorkingNormally - Samsung RFG298HD Service Manual

TROUBlESHOOTING

4-2-11. IfPantryPanelPCBisnotworkingnormally

youshouldcheckthedisplayafterdooropeningbecausethedisplayofthismodeloperatesonly
whenthefreshfoodcompartmentdoorisopened.
IfPanelKeyisnot
selected
②IfPanelPCBKeyisnotselected
PCBTypicalGroundJ23JUMMPER
TheVoltageofKEyis
Workingevery2msec/4min
☞ C heckingmethodofvoltageBasedonPCBtypical
GroundJ23JUMMPER
1)Keyvoltage;CN51-"11"(SkyBlue)
a)Working:2V±0.5Vb)Normal:0V
Start
room
DoesR
Doorswitch
operatenormally?
Isthe
pantryroom
connector of
insertedcorrectly
IsMAINPCB
Connector(CN51)inserted
correctly?
IssignalofMAIN
PCBCN51normal?
Isthelighting
operatedwhenreplacePantry
Panel-PCB?
①CheckthewiresofPantryRoom-disconnection,shortbetweenwires
②RecheckthecontrolcircuitofMAINPCBPantryPanel
③CheckthewireassemblingbetweenPanelandMAIN
※Ifitisnotrepairedwiththeabovebasiccheckingmethod
stilloperatedbyseparating
Isthelightingoperated
afterreplacingthePantry
outputtedfromMAINPCBIC51
① C heckthewireofPantryRoom-disconnection,shortbetween
wires
② C hecktheshort/openofthepantrypanellightingcircuitin
MAINPCB.
Checkandrepairtheswitch
*Referto<howtorepairdoorswitch>
ReinsertConnector,Repairbadcontact
ReinsertconnectorinMAINPCB
Checkvoltage/ReplaceMAINPCB
PanelPCBitselfhastrouble.
Isakeypressed
continuously?
IsthePCBsystem
ofthemechanism?
Panel-PCB?
Isanormal  vol t age
duri n gthekeyoperati n g?
83
ReassemblePCBASS'y/Enforce
thecancelationofpressedkeys
ReassemblePCBASS'y/
Enforcethecancelationofpressed
keys
ConvertiblecompartmentPanel
PCBitselfhastrouble.
①ReplaceMAINPCB
② C hecktheshortofMAIN
Panel wire