Component Testing Procedures - Samsung DV220AEW/XAA 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.
n Component electrical testing (with ohmmeter)
• Thermistor resistance 10K Ω @ 25°C 77°F (2P-Blue & Red wire)
• Thermostat 1 resistance < 1Ω (White & Yellow wire)
• Thermostat 3 resistance < 1Ω (Red & Black wire)
- If resistance is infinity, replace thermostat 3.
• Thermostat 2 resistance < 1Ω (Blue & Black wire)
- If resistance is infinity, replace thermostat 2.
• Heater resistance 10 Ω (Blue & Blue wire)
- If resistance is infinity, replace Heater.
• Measure resistance of the following terminal
1. Door switch knob: open
Terminal : "COM" - "NC" (1-3) : ∞ Ω
Terminal : "COM" - "NO" (1-2) < 1Ω
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
• Lamp resistance 80~100 Ω (Violet & gray)
• Motor (Electronic & GAS)
34 _ Troubleshooting
Thermostat 1
85 °C, 25A thermal cut-off
Thermostat 3 Thermostat 2
160 °C, 25A 127/99 °C, 25A
thermal cut-off Hi-limit
Door S/W
125V/10A
Belt cut-off S/W
Lamp
Contacts ( : Contact closed)
Function 1M 2M 3M
Start
Run
Thermistor
Heater
240V/5300W
125V, 15A
120V/15W(E12)
5M 6M