Component Testing Information - LG DLE4870 Series Service Manual

5

COMPONENT TESTING INFORMATION

CAUTION When checking the Component, be sure to turn the power off, and do voltage discharge sufficiently.
!
Component
. Thermal cut off
• Check Top Marking:
N140
2.Hi limit Thermostat
(Auto reset)
3.Outlet Thermostat
( Auto reset)
• Check Top Marking:
N85
4. Lamp holder
5. Door switch
6. Idler switch
Test Procedure
Measure resistance of terminal
to terminal
Open at 284 41°F
(140 5°C)
Auto reset -31°F (-35°C)
Same shape as Outlet Thermostat.
Measure resistance of terminal
to terminal
Open at 257 9°F
(125 5°C)
Close at 221 9°F
(94 7°C)
Measure resistance of terminal
to terminal
Open at 185 41°F
(85 5°C)
Close at 167 41°F
(75 5°C)
Same shape as Thermal cut off.
Measure resistance of terminal
to terminal
Measure resistance of the
following terminal
1) Door switch knob: open
Terminal: COM - NC(1-3)
Terminal: COM - NC (1-2)
2) Door switch push: push
Terminal: COM - NC (1-3)
Terminal: COM - NC (1-2)
Measure resistance of the
following terminal:
COM - NC
Check result
If thermal fuse is open must
be replace
Resistance value
Continuity (250°F
Resistance value
Resistance value < 5Ω
Resistance value
Resistance value < 5Ω
Resistance value:
80Ω ~ 100Ω
Resistance value < 1Ω
Resistance value
Resistance value
Resistance value < 1Ω
1. lever open
Resistance value < 1Ω
2. Lever push (close)
Resistance value
12
Remark
• Heater case-
Safety
• Electric type
) < 1Ω
• Heater case -
Hi limit
• Electric type
• Blow housing -
Safety
• Electric type