Sharp r-8580 manual Component Replacement And Adjustment Procedure, Power Transformer Removal

R -8580

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: To avoid possible exposure to microwave energy;

A.Before operating the oven

1.Make sure that unlatching the door slowly is accompanied by a click indicating actuation of the monitor switch and latch switches.

2.Check visually the door seal for arcing and damage.

B.Do not operate the oven until after repair if any of the following conditions exist;

1.Door does not close firmly against the front of appliance.

2.There iS a broken door hinge or support.

3. The door is bent or warped. -

4.There is any defective parts in the interlock, oven door or microwave generating and trans-

mission assemblv.

------ ---I.

5.There is any other visible damage to the oven. C. Do not operate the oven

1.Without the RF gasket.

2.If the door is not closed.

CAUTION: DISCONNECT OVEN FROM POWER

SUPPLY BEFORE REMOVING

OUTER CASE. DISCHARGE HIGH

VOLTAGE CAPACITOR BEFORE

TOUCHING ANY OVEN COMPO- NENTS OR WIRING.

(RDA? 203U)

POWER TRANSFORMER REMOVAL

1.	Disconnect	oven from		power		supply and	remove
	outer case.
2.	Discharge	high	voltage	capacitor.
3.	Disconnect	filament leads			of	transformer	from the
	magnetron.
4.	Disconnect	wire	leads	from	the transformer.

3.Make sure the transformer is mounted correctly to the corners underneath those tabs

4.After re-installing the transformer, secure the transformer with two screws to the cabinet base, one is with outertooth washer and the other is

5

without outer-tooth washer.

ing the transformer to the cabinet base.

Re-install

1.Rest the transformer on the base cabinet with its primary terminals toward rear cabinet.

2.Insert the two edges of the transformer into two metal tabs of the base cabinet.

Re-connect the wire leads (primary and high voltage) to the transformer and filament leads of transformer to the magnetron, referring to the “Pictorial Diagram”.

6.Re-install the outer case and check that the oven is operating properly.

HIGH VOLTAGE RECTI IiFIER REMOVAL

1.

Disconnect

oven

from

power

suppply

and

remove

CAUTION: WHEN

REPLACING

THE

SILICON

outer case.

RECTIFIER,

THE

GROUND

SIDE

2.

Discharge

the

high voltage capacitor.

TERMINAL

MUST

BE SECURED

3.

Remove one

(1)

screw

holding

the

rectifier

to the

FIRMLY

WITH

A GROUNDING

capacitor

holder.

SCREW.

4.

Disconnect

the rectifier

from the capacitor.

HIGH VOLTAGE CAPACITOR REMOVAL

I. Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor.

3.Disconnect the high voltage wire leads from high voltage capacitor.

4.Remove one (1) screw holding capacitor mounting bracket.

5.Disconnect rectifier and high voltage rectifier from the capacitor. .br

6.Remove one (1) screw holding the high voltage rectifier and the capacitor holder.

7.Remove the capacitor from the holder.

TURNTABLE MOTOR AND/OR COUPLING REMOVAL

Disconnect the oven from power supply.

::Remove one (I ) screw holding the turntable motor cover to the base cabinet and take off the turntable

motor cover.

3.Disconnect 2-pin connector from the turntable mo- tor.

4.Remove the two (2) screws holding the turntable motor to the mounting plate of the oven cavity.

5 Pull the turntable coupling out of the oven cavity. 6. The turntable motor is now free.

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