5-13
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) 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
Summary of Contents for MS-2072A
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 28: ...6 2 13581A 14970A 14026A 13552A 13213A 13352A 13720D 13650A WTP027 DOOR PARTS ...
Page 30: ...6 4 33112U WTT021 36549S WTP013 33390G 35889A 33052M 340511 OVEN CAVITY PARTS ...
Page 31: ...6 5 43501A 43500A 466001 WSZ084 466003 466001 44510A LATCH BOARD PARTS ...
Page 33: ...6 7 56170D 63302A 63303A WTT021 WSZ002 65006B 948501 BASE PLATE PARTS ...
Page 34: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 35: ...8 2 PRINTED CIRCUIT BOARD ...
