Component Testing Information - LG CDE3379WD Service Manual

COMPONENT TESTING INFORMATION

11
WARNING
!
• When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently.
• Failure to follow these instructions can result in death or electrical shock.
Component
1. Thermal cut off
• Check Top Marking:
N130
2. Hi limit Thermostat
(Auto reset)
3. Outlet Thermostat
( Auto reset)
• Check Top Marking:
N85
5. Door switch
6. Idler switch
Test Procedure
Measure resistance of terminal
to terminal
① Open at 266 ± 12°F
(130 ± 7°C)
② Auto reset 31°F (35°C)
Same shape as Outlet Thermostat.
Measure resistance of terminal
to terminal
① Open at 257 ± 9°F
(125 ± 5°C)
② Close at 221 ± 9°F
(105 ± 5°C)
Measure resistance of terminal
to terminal
① Open at 185 ± 9°F
(85 ± 5°C)
② Close at 149 ± 9°F
(65 ± 5°C)
Same shape as Thermal cut off.
Measure resistance of the
following terminal
1) Door switch knob: open
① Terminal: COM - NC (1-3)
② Terminal: COM - NO (1-2)
2) Door switch push: push
① Terminal: COM - NC (1-3)
② Terminal: COM - NO (1-2)
Measure resistance of the
following terminal:
COM - NC
Check result
If thermal fuse is open must
be replaced
① Resistance value ≒ ∞
② Continuity (250°F ↓ ) < 1Ω
① Resistance value ≒ ∞
② Resistance value < 5Ω
① Resistance value ≒ ∞
② Resistance value < 5Ω
① Resistance value < 1Ω
② Resistance value ≒ ∞
① Resistance value ≒ ∞
② Resistance value < 1Ω
1. lever open
① Resistance value < 1Ω
2. Lever push (close)
② Resistance value ≒ ∞
30
Remark
• Heater case-
Safety
• Electric type
• Heater case -
Hi limit
• Electric type
• Blow housing -
Safety
• Electric type
If the knob is
pressed, the
state is the
opposite of
what is on the
chart.