5-13
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).
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 5-7, 5-8
Summary of Contents for MS-2642FB
Page 26: ...6 1 EXPLODED VIEW INTRODUCTION ...
Page 27: ...6 2 13213A 13552A 15006A 13581A 13536A 14026A 14970A 13352A 13720D DOOR PARTS ...
Page 28: ...6 3 23506A 23572A 268711 WTP018 24781M CONTROLLER PARTS ...
Page 29: ...6 4 36549S WTP013 33390G 34370T WTT010 WTT021 33112U 35889A WTT011 33052M OVEN CAVITY PARTS ...
Page 30: ...6 5 WSZ085 466001 466003 466001 44510A 43500A LATCH BOARD PARTS ...
Page 32: ...6 7 WTT021 63302A 63303A 56170D WSZ002 948503 WTT028 647781 BASE PLATE PARTS ...
Page 33: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 34: ...8 2 PRINTED CIRCUIT BOARD ...
