Component Testing Information - LG DLGX3371W Service Manual

5

COMPONENT TESTING INFORMATION

CAUTION
! When checking components, turn the power off and discharge voltage.
Component
1. 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 ± °F
(140 ± 5°C)
Same shape as outlet thermostat.
Measure resistance of terminal
to terminal
Open at 257 ± 9°F
(125 ± 5°C)
Close at 2 1 ±
°F
(94 ± 7°C)
Measure resistance of terminal
to terminal
Open at 185 ± °F
(85 ± 5°C)
Same shape as thermal cut off.
Measure resistance of terminal
to terminal
Measure resistance of the
following terminal
1) Door open
Terminal: COM - NC (1-3)
Terminal: COM - NO (1-2)
2) Door closed
Terminal: COM - NC (1-3)
Terminal: COM - NO (1-2)
Measure resistance of the
following terminal:
COM - NC
Check result
If thermal fuse is open must
be replaced
Resistance value
Continuity (250°F
Resistance value
Resistance value < 5
Resistance value
Resistance value < 5
Resistance value:
Ω Ω
80 ~ 100
Resistance value < 1
Resistance value
Resistance value
Resistance value < 1
1. Lever open
Resistance value < 1
2. Lever push (close)
Resistance value
14
Remark
• Heater case-
Safety
∞
• Electric type
Ω
) < 1
• Heater case -
Hi limit
∞
• Electric type
Ω
• Blow housing -
Safety
∞
Ω
Ω
∞
∞
Ω
Ω
∞