Component Testing Procedures; Component Electrical Testing (With Ohmmeter) - Samsung DV448AEP Service Manual

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 3 resistance < 1Ω
- If resistance is infinity, replace thermostat 3.
• Thermostat 2 resistance < 1Ω
- If resistance is infinity, replace thermostat 2.
• Heater resistance 10 Ω
- If resistance is infinity, replace 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
• Belt Cut-off S/W
- Lever open: Resistance value < 1Ω
- Lever push: Resistance value ∞ Ω
• When voltage (DC10V) is linked, Lamp confirms that is lighted up.
• Motor (Electronic & GAS)
36 _ Troubleshooting
Thermostat 1
85 °C, 25A thermal cut-off
THERMOSTAT 2
THERMOSTAT 3
Door S/W
125V/10A
Belt cut-off S/W
Contacts ( : Contact closed)
Function 1M 2M 3M
Start
Run
Thermistor
HEATER
125V, 15A
DC12V
5M 6M