Samsung DV448AEP - 4-5. COMPONENT TESTING PROCEDURES

36 _ Troubleshooting
4-5. COMPONENT TESTING PROCEDURES
WARNING
Toavoidriskofelectricalshock,personalinjuryordeath;disconnectpowertodryerbeforeservicing,unlesstesting
requirespower.
■ Component electrical testing (with ohmmeter)
• Thermistorresistance10KΩat25°C77°F
• Thermostat1resistance<1Ω
Thermostat1
Thermistor
85°C,25Athermalcut-off
• Thermostat3resistance<1Ω
- Ifresistanceisinnity,replacethermostat3.
• Thermostat2resistance<1Ω
- Ifresistanceisinnity,replacethermostat2.
• Heaterresistance10Ω
- Ifresistanceisinnity,replaceHeater.
THERMOSTAT 2
THERMOSTAT 3
HEATER
• Measureresistanceofthefollowingterminal
1. Doorswitchknob:open
Terminal:“COM”-“NC”(1-3)<1Ω
Terminal:“COM”-“NO”(1-2):∞Ω
2. Doorswitchpush:On
Terminal:“COM”-“NC”(1-3):∞Ω
Terminal:“COM”-“NO”(1-2)<1Ω
Door S/W
125V/10A
• BeltCut-offS/W
- Leveropen:Resistancevalue<1Ω
- Leverpush:Resistancevalue∞Ω
Beltcut-offS/W
125V,15A
• Whenvoltage(DC10V)islinked,Lampconrmsthatislightedup.
DC12V
• Motor(Electronic&GAS)
Contacts ( :Contactclosed)
Function 1M 2M 3M 5M 6M
Start
Run