Samsung WA48H7400A Serie Informations Techniques page 17

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 : WA45H7200A*)
- 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 Resistance at Pin #9 and #7 of CN802
Tester Check = 47㏀
Hall Sensor Check
Check Voltage at Pin #4 and #3 of CN9
Tester Check = DC0.6V
Check Voltage at Pin #4 and #2 of CN9
Tester Check = DC0.6V
Motor Check
Resistance at Pin #1 of CN3 and GND
= 226㏀
Resistance at Pin #2 of CN3 and GND
= 226㏀
Resistance at Pin #3 of CN3 and GND
= 226㏀
Drain Motor_Pump Check
Check Voltage at Pin #3 of CN1 and Pin #5 of CN4
When Drain Pump operates = AC 120V
WA7000HA WASH_WA48H_TECH MANUAL_DC68-03132G-01_EN.indd 17
WARNING
CN802 CN501
CN201
Micom writing
Water Sensor Check
Check Frequency at Pin #11 and #7 of CN802
Reset frequency = 25.6KHz
Check Frequency at Pin #12 and #7 of CN802
Reset frequency = 25.6KHz
Water Valves/ Check
Check Voltage at Pin #3 of CN1 and Pin #1,2,3,4 of CN4
When Valves operates = AC 120V
Clutch-Motor
Check Voltage at Pin #3 of CN1 and Pin #8 of CN4
When Valves operates = AC 120V
AC Power Check
Check Voltage at Pin #1 and #3 of CN1
Tester Check = AC 120V
Door Lock Check
Check Voltage at Pin #3 and #5 of CN8
When Door Lock = DC 6.5V
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2014-1-6 15:56:30