Sharp R-23AM Manuel de service télécharger pdf (Page 30)

R-22AT

R-23AM

R-24AT

1. Disconnect the oven from power supply.

2. Make sure that a definite “click” can be heard when the

microwave oven door is unlatched. (Hold the door in a

closed position with one hand, then push the door open

button with the other, this causes the latch leads to rise,

it is then possible to hear a “click” as the door switches

operate.)

3. Visually check the door and cavity face plate for dam-

age (dents, cracks, signs of arcing etc.).

Carry out any remedial work that is necessary before

operating the oven.

Do not operate the oven if any of the following conditions

exist;

1. Door does not close firmly.

2. Door hinge, support or latch hook is damaged.

3. The door gasket or seal is damaged.

4. The door is bent or warped.

5. There are defective parts in the door interlock system.

6. There are defective parts in the microwave generating

and transmission assembly.

7. There is visible damage to the oven.

Do not operate the oven:

1. Without the RF gasket (Magnetron).

2. If the wave guide or oven cavity are not intact.

3. If the door is not closed.

4. If the outer case (cabinet) is not fitted.

Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any

of the following removal procedures:

OUTER CASE, REAR CABINET AND POWER SUPPLY CORD REMOVAL

To remove the components, procedure as follows.

1. Disconnect oven from power supply.

2. Open the oven door and wedge it open.

3. Remove the screws from the rear and along side the

edge of the outer case.

4. Slide the case back about 1 inch (3 cm) to free it from

the oven cavity.

5. Lift entire case from the unit.

6. DISCHARGE TWO HIGH VOLTAGE CAPACITORS

BEFORE TOUCHING ANY OVEN COMPONENTS

OR WIRING.

7. Now, outer case is free.

N.B.; Step 1,2 and 9 form the basis of the 3D checks.

CAUTION:DISCHARGE TWO HIGH VOLTAGE CA-

PACITORS BEFORE TOUCHING ANY

OVEN COMPONENTS OR WIRING.

To remove rear cabinet and power supply cord:

8. Remove the screws holding the rear cabinet to the

oven cavity and blower motor.

9. Remove the one (1) screws holding the switch mount-

ing angle to the rear cabinet and release the switch

mounting angle from the rear cabinet.

10.Disconnect the power supply cord from the fuse holder.

11.Remove the one (1) screws holding the grounding wire

of power supply cord to the oven cavity.

12.Remove the rear cabinet with the power supply cord

from the oven cavity.

13.Loosen the tab of the cord bushing, and remove the

power supply cord with the cord bushing from the rear

cabinet.

14.Remove the cord bushing from the power supply cord,

15.Now, the power supply cord and rear cabinet are free.

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before

operating the oven.

To prevent an electric shock, take the following

precautions.

1. Before wiring,

1) Disconnect the power supply cord.

2) Open the door and block it open.

3) Discharge the two high voltage capacitors and

wait for 60 seconds.

2. Don’t let the wire leads touch to the followiong parts;

1) High voltage parts:

Magnetron, High voltage transformer, High volt-

age capacitor, High voltage rectifier assembly and

High voltage wire.

2) Hot parts:

Oven lamp, Magnetron, High voltage transformer,

WARNING FOR WIRING

and Oven cavity.

3) Sharp edge:

Bottom plate, Oven cavity, Waveguide flange,

Chassis support and other metallic plate.

4) Movable parts (to prevent a fault)

Blower fan blade, Blower fan motor, Switches,

Switch levers, Antenna motors and Sirrer anten-

nas.

3. Do not catch the wire leads in the outer case cabinet.

4. Insert the positive lock connector until its pin is locked

and make sure that the wire leads do not come off

even if the wire leads are pulled.

5. To prevent an error function, connect the wire leads

correctly, referring to the Pictorial Diagram.

HIGH VOLTAGE TRANSFORMER(S) REMOVAL

1. CARRY OUT 3D CHECKS.

2. Remove the rear cabinet, too.

3. Disconnect wire lead(s) of high voltage transformer(s)

from magnetron(s).

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Sharp R-23AM Manuel de service Page 30

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