Servicing; Chapter Iv Servicing 5; Troubleshooting Guide; Off Condition - Sharp R-8320E Service Manual

When troubleshooting the convection microwave oven, it
is helpful to follow the sequence of Operation in perform-
ing the checks.
Many of the possible causes of trouble will require that a
specific test be performed. These tests are given a proce-
dure letter which will be found in the "Test Procedures"
section.
PROBLEM
Home fuse blows when power cord
is plugged into wall receptacle.
Oven fuse blows when power
cord is plugged into wall
receptacle.
when power cord is first plugged
into wall outlet.
Display does not operate
properly when CLEAR key is
touched. (Buzzer should sound
and time of day should appear
in display.)
Oven lamps do not light with
door opened.
CHAPTER IV

SERVICING

TROUBLESHOOTING GUIDE

IMPORTANT (Australia model only)
POSSIBLE CAUSE

OFF CONDITION

Shorted wire in power cord or wire
harness.
Shorted wire in power cord or wire
harness.
Defective monitor switch.
(Australia Model)
Blown fuse.
Open wire in power cord, wiring
harnes, or wiring between control
panel assembly units.
Defective control unit.
Defective relay unit.
I Defective key unit.
Defective control unit.
Defective relay unit.
No power in home.
Open wire in power cord or wire
harness.
Defective oven lamp.
Open or loose wire connection to the
above components.
Blown fuse.
: If the oven becomes inoperative because of
a blown fuse in the upper-monitor switch
circuit, check the upper latch switch and
monitor switch before replacing the fuse.
TEST PROCEDURE OR
CORRECTION
Replace cord or check wiring.
Replace power cord or check and
repair wire harness.
Procedure G.
Procedure H.
Replace or repair wiring.
Procedure L.
Procedure 0.
Procedure L.
Procedure L.
Procedure Q.
Check wall outlet.
Replace same or repair wiring.
Replace both lamps.
Check wiring.
Procedure H.
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