LG DLEX4270 Series Service Manual page 27

<Gas Dryer>
Component
Main PWB
Tab relay(B)④-YL3①
Igniter
Flame Detector
Thermostat(Hi-limit)
Thermostat(Safety)
Door switch
Picture
Measure voltage of connector to
connector
① Igniting
② Stop
Measure resistance of terminal to terminal
Measure resistance of terminal to terminal
① Open at 370℉ (188℃) [Maximum] ② Close at
320℉ (160℃)
Measure resistance of terminal to terminal ① Open
at 203 ± 41℉ (95 ± 5℃) ② Close at 158 ± 41℉ (70
± 5℃)
Measure resistance of terminal to terminal ① Open
at 230 ± 41℉ (110 ± 5℃) ② Close - Manual reset
Measure resistance of the following terminal
1) Door switch knob: open
NC
①Terminal: COM - NC (1-3)
NC
②Terminal: COM - NO (1-2)
Com
2)Door switch push: close
③Terminal: COM - NC (1-3)
④Terminal: COM - NO (1-2)
Test Point
27
Value
① Voltage value =
120Vac
② Voltage value = 0
Resistance value =
50~800Ω
① Resistance value
≒ ∞
② Resistance value
＜ 1Ω
① Resistance value
≒ ∞
② Resistance value
＜ 5Ω
① Resistance value
≒ ∞
② Resistance value
＜ 1Ω
①Resistance value <
1Ω
②Resistance value ≒ ∞
③Resistance value ≒ ∞
④Resistance value <
1Ω