Samsung WF457ARGSGR/AA - WF457 AR* PCB Component Checks; Sensor, Motor, and Valve Component Tests

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Hall Sensor Check
CheckVoltageatPin#4and#2ofCN3
TesterCheck=DC0Vor1.3V
CheckVoltageatPin#4and#3ofCN3
TesterCheck=DC0Vor1.3V
Motor Check
ResistanceatPin#1and#2ofCN11=12Ω
ResistanceatPin#1and#3ofCN11=12Ω
ResistanceatPin#2and#3ofCN11=12Ω
Door Lock Check
CheckVoltageatPin#1ofCN6andPin#2ofRY5
WhenDoorLock=AC120V
Drain Motor Check
CheckVoltageatPin#5ofCN6andPin#2ofRY5
WhenDrainMotoroperates=AC120V
CIRCLE Motor Check
CheckVoltageatPin#4ofCN6andPin#2ofRY5
WhenCirculationMotoroperates=AC120V
Water Valve Check
CheckVoltageatPin#2,6,7,8,9,10ofCN6andPin#2
ofRY5
Wheneachvalveoperates=AC120V
AC Power Check
CheckVoltageatPin#1ofCN5and#2ofPOWER
RELAY
TesterCheck=AC120V
Wash Heater Relay Check
CheckVoltageatPin#2ofRY6andPIN#2ofRY5
WhenHeaterRelayoperates=AC120V
PROBLEM CHECKING AND METHOD OF PCB (Model: WF457AR*)
- IfyoupluginthepowercordandturnPowerS/Won,memorizeddataisdisplayed.
Ifanydataisnotdisplayed,checkthefollowings.
Thermistor Check
CheckVoltageatPin#8and#9ofCN7
TesterCheck=DC1.6V
Ifitready5V,checkifitsconnectorisengaged
properly.
Water Sensor Check
CheckVoltageandFrequencyatPin#10and#9ofCN7
Resetwaterlevel=DC1.6V,26.0KHz
CheckVoltageandFrequencyatPin#11and#9ofCN7
Resetwaterlevel=DC1.6V,26.0KHz
TROUBLE SHOOTING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertowasher
beforeservicing,unlesstestingrequirespower.
WARNING
CN5 £ ¥
CN11
£
¥
RY5
£
¤
RY6 £ ¤
CN6
¨ §
¬ £
CN3 ¦ £
¬ £ CN7
CN1 ª £
(Techsheet)WF457AR-03152A_EN.indd 20 2012-03-07 �� 3:25:54