LG LMC1575BD, Service Manual

Page: 27 / 55

5-15
Abnormal
normal
(TROUBLE 2) Oven does not operate at all, Display window does not display any figures, and no input is accepted.
CONDITION CHECK RESULT CAUSE REMEDY
1. Fuse blows. Continuity.
No continuity.
Continuity.
Shorted contact at the
primary switch.
Replace fuse,
Latch board assembly
and main PCB
No continuity.
Defect inverter
Replace inverter
Defect magnetron Abnormal Replace magnetron
Malfunction of the
monitor switch.
Replace fuse,
Latch board assembly
and main PCB
Check continuity of
monitor switch (with
door closed).
Check continuity of
primary switch (with
door opened).
check inverter
(refer page 5-15)
Check magnetron
Replace fuse
Continuity.
Malfunction of secondary
switch.
Replace fuse,
Latch board assembly
and main PCB
No continuity.
Check continuity of
secondary switch (with
door opened).