LG TD-C70070E Service Manual page 17

COMPONENT TESTING TIPS
7
Component
7. Door S/W
COM
NO
NC
8. Lamp holder
Test procedure
Measure resistance of the
Following terminal
1) Door switch knob : open
①Terminal : "COM"- "NC"
(1-3)
②Terminal : "COM"- "NO"
(1-2)
2)Door switch push : Push
①Terminal : "COM"- "NC"
(1-3)
②Terminal : "COM"- "NO"
(1-2)
Measure resistance of
terminal to terminal
Check result
① Resistance value < 1Ω
② Resistance value ÷ ∞
① Resistance value ÷ ∞
② Resistance value < 1Ω
Resistance value :
80Ω~100Ω
AC 230V, 20W
16
Remark
The state that
knob is Pressed is
opposite to open
condition