Jenn-Air JMW8527DA Series Service Manual page 12

Microwave Troubleshooting Procedures
To avoid risk of electrical shock, personal injury or death: disconnect power to oven before servicing, unless
testing requires it.
CONDITION
1. Fuse blows.
2. Fuse does
not blow.
12
!
CHECK
Check continuity
Continuity.
of monitor
switch (with
door closed).
No continuity.
Replace fuse
Check continuity
Continuity.
of primary switch
and door sensing
switch (with door
opened)
No continuity.
Disconnect one
Normal.
side of the wire
lead connected
from transformer
Fuse blows again
to the high voltage
capacitor and
operate the unit.
No continuity.
Check continuity
of thermostat.
Continuity.
Check continuity
No continuity.
of power supply
cord.
W ARNING
RESUL CAUSE
Malfunction of the
monitor switch.
Shorted contact at
the primary switch.
Failed high
voltage capacitor.
Failed high voltage
transformer.
Failed
thermostat.
Failed power
supply cord.
16022821 Rev. 0
REMEDY
Replace fuse,
primary, monitor,
P.C.B Assembly.
Replace fuse,
primary, monitor,
P.C.B Assembly.
Replace high
voltage capacitor.
Replace high
voltage
transformer.
Replace
thermostat.
Replace power
supply cord.
©2004 Maytag Appliances Company