Sharp r-8580 manual Cooking Condition, Problem Possible Cause Test Procedure or Correction

Page 13

R -8580

PROBLEM	POSSIBLE CAUSE	TEST PROCEDURE OR
		CORRECTION

COOKING CONDITION

Oven lamp does not light in cook cycle.

(Does light when door is opened)

Oven lamp does not light at all.

Oven lamp lights, but turntable motor does not operate.

Turntable motor operates normally but cooling fan motor does not operate

MICROWAVE

Oven does not go into a cook cy- cle when START pad is touched.

Oven seems to be operating but little or no heat is produced in

oven load.( Food incompletely cooked or not cooked at all at end

of cook cycle.)

Oven goes into a cook cycle but

extremely uneven heating is produced in oven load(food).

Oven does not cook properly when programed for MEDIUM etc. cooking powers.

(Operates properly on HIGH)

Oven does not cook properly when programed in EASY DE- FROST cooking mode.

Defective

shut-off

relay

(RY2)

on

relay

Procedure

N.

unit.

Defective

CPU

unit.

Procedure

0.

Burned

out

bulb.

Replace

Open

wiring

of

oven

lamp.

Check

and

repair

wiring

Open

or

loose

wiring

to turntable

motor.

Check

and

repair

wiring

Defective

turntable

motor.

Replace

Defective

cooling

fan

motor.

Replace.

Defective

shut-off

relay

(RY5)

on

relay

Procedure

N.

unit.

Open

or

loose

wiring

to fan

motor

Check

and

repair

wiring

Upper

latch

switch

and/or

lower

latch

Procedure

E.

switch defective or out adjustment.

Defective

cook relay (RYI ) on relay unit.

Procedure

N.

Defective

CPU

unit.

Procedure

0.

Defective

key

unit.

Procedure

P.

Open

or

loose

wiring

to

above

compo-

Check

and

repair

wiring

nents.

Defective

magnetron.

Procedure

A.

Defective

cook relay (RYI ) on relay unit.

Procedure

N.

Defective

power

transformer.

Procedure

B.

Defective

high

voltage

rectifier.

Procedure

C.

Defective

high

voltage

capacitor.

Procedure

0.

Defective

CPU

unit.

Procedure

0.

Open

or

loose

wiring

to

above

compo-

Check

and

repair

wiring

nents.

Turntable

motor

does

not

operate.

Replace turntable

motor or

check

and

repair

wiring.

Defective

CPU

unit.

Procedure

0.

Defective

key

unit.

Procedure

P.

Open

or

loose

wiring

to

above

compo-

Check

and

repair

wiring

I nents.

Defective

EASY

DEFROST

function.

Refer

to

EASY

DEFROST

section

in

operation manual

and check

CPU unit.

12

Image 13

Contents Sharp Sharpcorporatkn OSAKA, Japan Microwave RadiationConvection Microwave Oven 8580Product Description SpecificationAuto-TouchTM Control Panel Description of Operating Sequence OperationOFF Condition Cooking ConditionAutomatic MIX Cooking Condition Convection Cooking ConditionPreheating Condition Convection Cooking ConditionCompu Cook Sensor Cooking ConditionEasy Defrost Cooking Cooking Sequence240V-50Hz G-4 Figure O-l. Oven Schematic-OFF ConditionFigure O-3. Oven Schematic-Convection Cooking Condition Description and Function of Components Convection Cooking System Convection HeaterDamper OPEN-CLOSE Mechanism Servicing Problem Possible Cause Test Procedure CorrectionOFF Condjtion Problem Possible Cause Test Procedure or Correction Nents Defective Convection Heater Procedure RelayRY4 Unit Microwave Output Power Test Procedures Letter Component Magnetron Assembly TestPower Transformer Test Procedure Letter Test Procedures CONT’D Component TestSwitch Test High Voltage Rectifier and Rectifier TestBlown Fuse Test Procedures CONT’D Letter Component Monitor Switch TestTEMP. Fuse Test Thermal CUT-OUTDamper Switch Test Procedure LetterThermistor Test Damper Motor TestRelay Symbol Operational Connected Components Voltage Test Procedures CONT’O Letter Component Relay UnitKEY Unit Test Checking the initial sensor cooking condition Testing Method for AH Sensor AND/OR Control UnitWater load cooking test Steps Occurance Cause or Correction Sensor Dummy Resistor CircuitOutline of Touch Control Panel Touch Control Panel AssemblyLSI LSI IZA096DR Description of LSJSeqment Data Siqnal Seqment Data signalKev strobe siqnal Internal clock oscillation frequency input settinqSignal svnchronized with commercial source frequencv50Hz Signal to SoundPower source voltage Magnetron High-voltaae Circuit driving SignalInput signal which communicates the door open/close Damper motor relav driving signalSignal cominq from touch kev Signal coming from touch keySensor Inuut Temperature measurement input Oven ThermistorRI4 Terminal For Manufacture TestSensor Circuit Absolute HumidityServicing Other PrecautionsShapes of Electronic Components Servicing of Touch Control PanelPower Transformer Removal Component Replacement and Adjustment ProcedureHigh Voltage Capacitor Removal Turntable Motor AND/OR Coupling RemovalConvection Motor Removal Magnetron RemovalCooling FAN Motor Removal Lower Latch Switch and Stop Switch Removal Upper Latch Switch / Monitor Switch RemovalDamper RemovalCPU Unit and KEY Unit Control Panel Assembly and CPU Unit RemovalDoor Replacement Door Replacement and AdjustmentDoor Adjustment Microwave Measurement Preparation for TestingRequirement 11II II II II OIL 8580 II I Figure S-3. Printed Wiring BoardAY AK AF AH Parts ListRR-DZ561PDREO Q8LAT AH FOVN-A090WRYO AG AD 11 AA 13 AA Ii AA Replacement Parts List 8580 ‘Y \‘\ Control Panel Parts Door Assembly MiscellaneousPacking and Accessories 8580 8580 Sharp