R-8470
R-8570
SERVICING
When troubleshooting the microwave oven, it is
IMPORTANT: If then oven becomes inoperative
to follow the Sequence of Operation in
cause of a blown monitor fuse in the
forming the checks. Many of the passible causes of
monitor switch and upper latch switch
trouble will require that a specific test be performed.
circuit, check the monitor switch and
These tests are given a procedure letter which will be
upper latch switch before
found in the “Test Procedure”section.
the monitor fuse.
Home fuse blows when power
Shorted wire in power cord or wire har-
Replase cord or check wiring.
cord is plugged into wall recepta-
ness.
cle.
Monitor fuse blows when power
Shorted wire in power cord or wire har-
Replace power cord or check
cord is plugged into wall recepta-
ness.
and repair harness.
Defective monitor switch.
Procedure F.
do not appear in display No power at outlet.
Check home fuse.
when power cord is first plugged
Blown monitor fuse.
Psocedure G.
into wall outlet.
Blown magnetron temp. fuse.
Psocedure H.
Open wire in power cord, wiring harness,
Replace or repair wiring.
or wiring between control panel assembly
units.
Defective control unit.
Procedure K.
Defective relay unit.
Procedure J.
Display does not operate properly
Defective key unit.
Procedure L.
when
STOP/CLEAR
key is
touched. (Buzze should sound
defective control unit.
Procedure K.
and time of day should appear in
Defective relay unit
Procedure J.
display.)
Defective stop switch
Procedure E.
Oven lamp does not light with No power in home.
Check wall outlet.
door opened.
Open wire in power cord or wire harness.
same or repair wir-
Defective oven lamp.
Replace.
Defective upper
switch.
Procedure E.
Open or loose wire connection to the Check wiring.
above components.
Blow monitor fuse or magnetron temp. Procedure G or H.
fuse.
10
Содержание R-8470
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