5-14
(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 5-7, 5-8
2. Fuse does not
blow.
No continuity.
No continuity.
Replace power
supply cord.
Defective
thermostat.
Defective power
supply cord.
Replace
thermostat.
Check continuity
of thermostat.
Check continuity
of power supply
cord.
Continuity.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor
secondary
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
secondary
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
Continuity.
Malfunction of
secondary switch.
Replace fuse,
primary, monitor,
secondary
switches, and
RELAY(RY2) of
P.C.B Assembly.
No continuity.
Check continuity
of secondary
switch (with
door opened).
Summary of Contents for MH-1446SQP
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 28: ...6 1 EXPLODED VIEW INTRODUCTION MODEL MH 1446SQP EV ...
Page 29: ...6 2 13213A 13552A 15006A 13581A 13536A 14026A 14970A 13720D 14890A DOOR PARTS EV ...
Page 30: ...6 3 23572A 24781M WTP018 268711 24510L 250201 24970A 23506A CONTROL PANEL PARTS EV ...
Page 32: ...6 5 43501A WSZ085 466001 466001 466003 43500A LATCH BOARD PARTS EV ...
Page 34: ...6 7 WTT021 63302A 63303A 56170D WSZ002 948502 65006B BASE PLATE PARTS EV ...
Page 35: ......
