LG LMVH1750SB Service Manual page 28

COMPONENTS
VENTILATION MOTOR
DAMPER MOTOR (D.M)
TURNTABLE MOTOR (T.M)
STIRRER MOTOR (S.M)
THERMISTOR
HEATER ELEMENT
SENSOR
1
2
3
TEST
1. Remove wire leads.
2. Measure resistance.
(ohm meter scale: Rx1)
1. Remove wire leads.
2. Measure resistance.
(ohm meter scale: Rx1000)
1. Remove the connector from PCB
2. Measure resistance across pins 1 & 3.
(ohm meter scale: Rx1)
1. Remove wire leads.
2. Measure resistance.
(ohm meter scale:Rx1)
1. Remove the 3 pin connector from PCB.
2. Measure resistance across pins 1 & 2.
3. Across pins 2 & 3.
(ohm meter scale:Rx1)
7-17
RESULTS
Normal:
Approximately
25 to 45 ohm
Normal:Approximately
D.M T.M S.M
2.3-3.5 2.6-3.5 100-170
Kohm Kohm ohm
Abnormal:
Infinite or several.
Normal:
Approximately 250 to 350
Kohm at 68 ± 35°F
Abnormal:
Infinite or several.
Normal: Approximately
Conv. HTR
15-25
Abnormal:
Infinite or several.
Normal: Approximately
1 & 2 2 & 3
∞
3.1 Kohm
at 68 ± 35°F
Abnormal:
Infinite or several.