Problem Checking And Method Of Pcb - Samsung WF42H5700A Series Technical Information

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

- 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.
Door Lock Check
Check Voltage at Pin #2 of CN10 and Pin # 3 of RY7
When Drain Motor operates = AC 120V
Drain Motor Check
Check Voltage at Pin #5 of CN10 and Pin # 3 of RY7
When Drain Motor operates =AC 120V
CIRCLE Motor Check
Check Voltage at Pin #4 of CN10 and Pin # 3 of RY7
When Circulation Motor operates =AC 120V
Water Valve Check
Check Voltage at Pin #10 of CN10 and Pin # 3 of RY 7
When Circulation Motor operates =AC 120V
AC Power Check
Check Voltage at Pin #1 of CN11 and Pin #4 of Power
RY7
Tester Check = AC 120V
WARNING
CN201
CN601
CN402
CN3
CN11
Wash Heater Relay Check
Check Voltage at Pin # 3 of RY2 and Pin # 3 of RY7
When Heater Relay operates =AC 120V
Hall Sensor Check
Check Voltage at Pin #4 and #2 of CN2
Tester Check = DC 0V or 1.3V
Check Voltage at Pin #4 and #3 of CN2
Tester Check = DC 0V or 1.3V
Motor Check
Resistance at Pin #1 and #2 of CN6 = 12Ω
Resistance at Pin #1 and #3 of CN6 = 12Ω
Resistance at Pin #2 and #3 of CN6 = 12Ω
20
CN6
CN5
CN1 CN2
CN4
CN9
CN6
CN7
CN10