Samsung RFG298HD Service Manual page 72

TROUBlESHOOTING
10)IfHumiditySensorhastrouble
ERRORCode
** M easuringpointofresistancevalueaccordingto
Sensor"
Humidity:CN30"1"↔ "3"
Resistancevaluewithopened:about50Ω
**0Ω:Shorttrouble/Ω∞:Opentrouble
Refertocircuitdiagraminthemanual
SensorMICOM/Connectornumber
Humidity ConnectorCN30-"3"(brown)to
J23JUMMPERPCBtypicalGround
Voltagemeasuredbetween3.5V~1.0V
MeasuringvoltageofICO1MICOM#81,
CN30-"3"(Brown)andJ23JUMMPERfrom
PCBtypicalGroundpartaresimilar.
→CheckthevoltageofResistance,R321
 C heckingmethodofHumiditySensorresistance
☞
CN30-"3"(Brown)↔ "1"(Gray)
-Comparethetemperaturetableafterthemeasure.
Start Start
IsMAINPCB
ConnectorCN30inserted
correctly?
yES yES
IsHumiditySensor
unitnormal?
yES yES
Isthevoltagebetween
MAINPCBConnectorCN30-"3"(Brown)and
J23JUMMPERnormal?
yES yES
Isinputvoltageof
ICO1MICOM#81normal?
yES
NotroublewithPCBtemperaturesensor.
Recheckthebadcontactoftheconnection
☞ CheckingmethodofHumiditySensorvoltage.
- M easurethevoltageofResistance,R321(IC01MICOM#81)
↔
onPCBorCN30-"3"(Brown) J23JUMMPER
- C omparethetemperaturetableafterthemeasure.
  M easuringvoltageofCN30-"3"(Brown)
are below
71
NO
Badcontactofconnector/insertcorrectly
NO
ReplacetheHumiditySensor
DATA2.HumiditySensorTable
NO(1.0V>Measurement<3.5V)
RecheckthePCB&Wi r eTermi n al  connecti o n
NO
Checktheiced-solder,solder
bringing,disturbedsolder
ExchangethePCB
PCBTypicalGround
↔
J23JUMMPER
J23JUMMPER