5-14
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace primary
and monitor
switches.
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 primary
and monitor
switches.
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
(TROUBLE 2) Oven does not operate at all ; Display window does not display any figures and
no input is accepted.
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.
No continuity.
Replace power
supply cord.
Defective mag-
netron thermostat.
Defective power
supply cord.
Replace mag-
netron thermostat.
Check continuity
of magnetron
thermostat.
Check continuity
of power supply
cord.
Continuity.
Summary of Contents for MG-556EJ
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 30: ...6 3 24781S 250201 23551A 23806C 268711 268712 250202 249401 249402 WTP015 CONTROL PANEL PARTS ...
Page 32: ...6 5 466001 43500A 466001 43501A 466003 LATCH BOARD PARTS ...
Page 34: ...6 7 63303A 63302A WTT021 WSZ062 WTT030 647781 56170D BASE PLATE PARTS ...
Page 35: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 36: ...8 2 PRINTED CIRCUIT BOARD ...
