LG MB-3949G Service Manual page 21

COMPONENTS
FAN MOTOR
(Wire leads removed)
TURNTABLE
MOTOR
(Wire leads removed)
NOTE : • A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE
CONNECTOR, NOT THE WIRES.
LGE Internal Use Only
TEST PROCEDURE
Measure the resistance.
(Ohm-meter scale: R x 100)
A
B
C
Measure the resistance.
(Ohm-meter scale: R x 1000)
5-11
RESULTS
Normal:
A ~ B
40 ~ 60Ω
Abnormal: ∞ or several Ω
Normal: Approx. 100~200 Ω
Abnormal: ∞ or several Ω
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Only for training and service purposes
A ~ C
300~500Ω