LG LMH1017CVW Service Manual page 22

COMPONENTS
FUSE
(Wire leads removed.)
CONVECTION HEATER
(Wire leads removed)
MAGNETRON
THERMOSTAT
FAN MOTOR
(Wire leads removed)
TEST PROCEDURE
Check for continuity of the switch with a
Multi-meter.
NOTE: If the fuse is blown, check the primary, the secondary, and the monitor
switches, H.V.D. and H.V.C. before replacing the fuse.
If the fuse is blown by improper switch operation replace the defective
switch and the fuse at the same time.
Replace just the fuse if the switches operate normally.
Measure the resistance.
(Multi-meter scale : R x 1)
NOTE: Make sure heater is fully cooled when tested.
Measure the resistance.
(Ohm-meter scale : R x 1)
5-11
RESULTS
Normal Abnormal
Normal:
Approx. 9.5 ohm
(at 20~30°C)
Normal Abnormal
Normal:
Approx. 49 ohm.
Abnormal: Infinite or several
ohm.