LG LMC1575BD Service Manual page 23

COMPONENTS
MAGNETRON
(Wire leads removed)
RELAY
Check for continuity of relay 2 with an ohm-meter.
(Remove wire leads from relay 2 and operate the unit.)
FAN MOTOR
Measure the resistance.(Ohm-meter scale: R x 1)
(Wire leads removed)
TURNTABLE MOTOR Measure the resistance.(Ohm-meter scale: R x 1)
(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.
TEST PROCEDURE
NOTE: When testing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the
gasket is in good condition.
Relay 2
Antenna
Gasket
Chassis
Filament
Unit working : 0Ω
Unit not working : infinite
Normal:
A: Approx.110~120 ohm
B: Approx. 25~30 ohm
B
Abnormal: Infinite or several ohm.
A
Normal: Approx. 115~130 ohm
Abnormal: Infinite or several ohm.
5-11
RESULTS