-28-
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor
switches, and
RELAY(RY2) of
P.C.B Assembly.
No continuity.
Normal.
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Fuse blows again
Defective high volt-
age transformer.
Replace high volt-
age transformer.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor
switches, and
RELAY(RY2) of
P.C.B Assembly.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the wire
lead connected
from transformer
to the high
voltage
capacitor and
operate the unit.
Replace fuse
2. Fuse does not
blow.
No continuity.
Continuity.
No continuity.
Defective power
supply cord.
Replace power
supply cord.
Defective
thermostat.
Replace
thermostat.
Check continuity
of thermostat.
Check continuity
of power supply
cord.
(TROUBLE 2) Microwave oven does not operate at all, Display window does not display any figures,
and no input is accepted.
Summary of Contents for LTM9020B
Page 35: ... 34 WTP013 35889A 34370T 36549S 33390G WTT010 WTT020 WSZ185 33052A 33112U OVEN CAVITY PARTS ...
Page 36: ... 35 WSZ085 56912B 55262A 44510A 43500A 466001 466003 466001 43501A LATCH BOARD PARTS ...
Page 38: ... 37 56170D 63303A WSZ002 WTT021 WTT028 647781 65006A 63302A WTT021 BASE PLATE PARTS ...
Page 40: ... 43 SCHEMATIC DIAGRAM OF P C B ...
Page 41: ...PRINTED CIRCUIT BOARD 44 ...
Page 42: ... 45 ...
