Samsung WF457AR Serie Informations Techniques page 21

TROUBLE SHOOTING
To avoid risk of electrical shock, personal injury or death; disconnect power to washer
before servicing, unless testing requires power.
PROBLEM CHECKING AND METHOD OF PCB (Model: WF455AR*)
- 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 #3 and #4 of CN6
Tester Check = DC 1.6V
If it ready 5V, check if its connector is engaged
properly.
CN3
CN1
CN6
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
(Techsheet)WF457AR-03152A-02_EN.indd 21
WARNING
Water Sensor Check
Check Voltage and Frequency at Pin #5 and #4 of CN6
Reset water level = DC1.6V, 26.0KHz
Check Voltage and Frequency at Pin #6 and #4 of CN6
Reset water level = DC1.6V, 26.0KHz
CN7
RY6
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
21
CN6
CN11
RY5
CN5
2012-12-13 11:23:06