LG LMVH1750SB Service Manual page 27

COMPONENTS
CAPACITOR
DIODE
Some inexpensive meters
may indicate infinite
resistance in both directions.
RELAY 8
RELAY 10
FAN MOTOR
CIRCULATION MOTOR
TEST
1. Remove wire leads.
2. Measure resistance.
(ohm meter scale: Rx1000)
• Terminal to terminal
• Terminal to case
1. Measure continuity. Forward.
(ohm meter scale: Rx1000)
2. Measure continuity. Reverse.
(ohm meter scale: Rx1000)
1. Measure continuity.
(ohm meter scale: Rx1)
2. Remove the lead wires and operate oven at
power level 1 through power level 10.
1. Measure continuity.
(ohm meter scale: Rx1)
2. Remove the lead wires and operate
oven at Convection Cooking.
1. Remove wire leads.
2. Measure resistance.
(ohm meter scale: Rx1)
7-16
RESULTS
Normal:
Momently indicates
several ohm, and then
gradually returns to infinite
Normal: Infinite.
Normal:Continuity.
Abnormal: Infinite.
Normal: Infinite.
Abnormal: Continuity.
Power
Level
1 4 Sec 18 Sec
2
6 Sec 16 Sec
3 14 Sec
8 Sec
4 10 Sec 12 Sec
5
12 Sec 10 Sec
6 8 Sec
14 Sec
7 16 Sec 6 Sec
8
18 Sec 4 Sec
9 2 Sec
20 Sec
10 0 Sec
22 Sec
Convection OFF
Cooking Start
Normal:
Approximately
Fan Cir
35-55 ohm 25-40 ohm
ohm
Abnormal:
Infinite or several.