Amana LD510D Service Manual page 21

(TROUBLE 1) Oven does not operate at all
CONDITION
1. Fuse blows.
NOTE : All these switches must be replaced at the same time. Refer to page 5-8
2. Fuse does not
blow.
CHECK
Check continuity
of monitor
switch (with
door closed).
Replace fuse
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.
Measure to
resistance high
voltage capacitor
(refer to page 5-9)
Check continuity
of thermostat.
Check continuity
of power supply
cord.
RESULT
Continuity.
No continuity.
Continuity.
No continuity.
Fuse blows again
Normal.
Normal.
Abnormal.
No continuity.
Continuity.
No continuity.
5-12
CAUSE
Malfunction of the
monitor switch.
Shorted contact at
the primary switch.
Defective high volt-
age transformer.
Defective high
voltage capacitor.
Defective
thermostat.
Defective power
supply cord.
REMEDY
Replace fuse,
primary, monitor
and secondary
switches.
Replace fuse,
primary, monitor
and secondary
switches.
Replace high volt-
age transformer.
Set is good condition
(defective fuse only)
Replace high
voltage capacitor.
Replace
thermostat.
Replace power
supply cord.