5-14
(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
NOTE : All these switches must be replaced at the same time. Refer to page 5-6, 5-7
2. Fuse does not
blow.
No continuity.
Continuity.
Check continuity
of power supply
cord.
Defective power
supply cord.
Replace power
supply cord.
Defective mag-
netron thermostat.
Replace mag-
netron thermostat.
Check continuity
of magnetron
thermostat.
No continuity.
1. Fuse blows.
Continuity.
Malfunction of the
monitor switch.
Replace primary
and monitor
switches.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
No continuity.
Disconnect one
side of the wire
lead connected
from transformer
to the high
voltage
capacitor and
operate the unit.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace primary
and monitor
switches.
Fuse blows again
Normal.
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Defective high volt-
age transformer.
Replace high volt-
age transformer.
Replace fuse
Summary of Contents for NN-J125MB EPG
Page 9: ...SCHEMATIC DIAGRAM 4 3 1 3 5 7 8 ...
Page 29: ...6 2 DOOR PARTS 13552A 13213A 13581A 13720D 14970A 14026A 13536A 14890A EV ...
Page 32: ...6 5 LATCH BOARD PARTS 56912B 948501 466001 466003 WSZ085 466001 43500A EV ...
Page 42: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 43: ...8 2 PRINTED CIRCUIT BOARD ...
