Troubleshooting Guide; Microwave Cooking Condition - Sharp R-8000E Service Manual

TROUBLESHOOTING GUIDE (CONT'D)
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE OR
CORRECTION
MICROWAVE COOKING CONDITION
Microwave lamp does not light when Defective cook switch.
Replace.
cook switch is pushed.
Defective magnetron therm0 cut-out.
Procedure D on GENERAL.
Defective upper latch switch Procedure 3.
Defective lower latch switch
Procedure 4.
Defective convection timer contacts 0 - @ .
Procedure H on GENERAL.
Defective microwave timer contacts (2)-(3). Procedure H on GENERAL.
Defective microwave lamp.
Replace.
1 Open or loose wire connection to the above Check wiring.
components.
Microwave lamp lights but turntable
motor does not operate.
Defective turntable motor. Replace.
Microwave lamp lights,
But microwave timer does
not operate.
Defective microwave timer contacts (7)-(8).
Open or loose wire connection.
Defective microwave timer.
Open wiring in circuit to the microwave
timer.
Procedure H on GENERAL
Check wiring.
Check wiring.
Check wiring.
Oven seems to be operating,
but little or no heat is produced
in oven load.
(Variable cooking control
is set at " -&: FULL POWER"
position.)
Defective vari-switch.
Defective magnetron.
Defective rectifier.
Procedure 5.
Procedure 1.
Procedure M on GENERAL.
Oven operates normally
when the variable cooking
control is set at
" -& : FULL POWER" position,
but not in any other mode.
Open goes into cook cycles,
but extremely uneven heating
is produced in oven load.
Defective high voltage capacitor
Defective power transformer.
Open or loose wire connection.
Defective vari-motor.
Open or loose wire connection.
Defective variable cooking mechanism.
Turntable does not rotate during cook
cycle due to the motor failure.
-.
Procedure N on GENERAL.
Procedure 2.
Check wiring.
Procedure 6.
Check wiring.
Check.
Replace turntable motor
or check wiring.
Oven goes into cook cycle,
but shut down before end
of cycle.
Magnetrol therm0 cut-out is open.
Open or loose wire connection.
Procedure D on GENERAL.
Check wiring.
20
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