LG LMC1575BD Service Manual page 28

NOTE : Do not separate micro switches from latch board. this may damage to latch board. If micro switch is fault, replace latch board assembly.
2. Fuse does not blow.
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program
times are set and START button is touched.
CONDITION
1. Setting time does not
count down when
touching START button.
2. Fan motor or oven
lamp do not turn on.
Check continuity of
thermostat.
Check continuity of
power supply cord.
CHECK
Check continuity of
secondary switch (with
door closed).
Check the connection
between connector and
PCB assembly.
Check fan motor.
Check oven lamp.
No continuity.
Continuity.
No continuity.
No continuity.
RESULT
Continuity.
No continuity.
Continuity
No continuity
Abnormal.
Abnormal.
Normal.
5-16
Defective thermostat.
Defective power supply
cord.
CAUSE
Defective secondary
switch.
Defective PCB assembly.
Loose connection.
Defective fan motor.
Defective oven lamp.
Replace thermostat.
RReplace power supply
cord.
REMEDY
Replace Latch board
assembly
Replace PCB assembly.
Connect them tightly.
Replace Latch board
assembly
Replace oven lamp.