R-464 (serv.man4). Control panel, component replacement and adjustment procedure - Sharp Home Appliance Service Manual (repair manual). Page 5

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cavity, referring to "POWER SUPPLY CORD
REPLACEMENT".

5. Disconnect the wire leads from  the turntable motor,

thermal cut-out (oven), thermal cut-out (MG.), all
switches on the latch hook, magnetron and oven lamp.

6. Release the two (2) snap bands of the main wire

harness from the oven cavity and the lamp angle.

7. Remove the two (2) screws holding the front cover to

the base plate.

8. Remove the front cover from the oven cavity by releasing

the three (3) tabs.

7. Lift entire outer case from the unit.

NOTE: Setps 1, 2 and 3 form the basis of the 3D checks.

CAUTION: 1. DISCONNECT OVEN FROM POWER SUP

PLY BEFORE REMOVING OUTER CASE.

2. TO DISCHARGE THE HIGH VOLTAGE

CAPACITOR WAIT FOR 60 SECONDS
BEFORE TOUCHING ANY OVEN COM-
PONENTS OR WIRING.

1. Disconnect oven from power supply.
2. Visually check the door and cavity face plate for damage

(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 or 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, DOOR PARTS’, when carrying out any of the following removal
procedures:

To prevent an electric shock, take the following
manners.
1. Before wiring,

1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) To discharge the high voltage capacitor, wait for

60 seconds.

2. Don't let the wire leads touch to the following parts;

1) High voltage parts:

Magnetron, High voltage transformer, High
voltage capacitor, High voltage rectifier assembly
and High voltage fuse.

2) Hot parts:

Oven lamp, Magnetron, High voltage transformer
and Oven cavity.

3) Sharp edge:

Bottom plate, Oven cavity, Waveguide flange,
Angles, Guides and other metallic plate.

4) Movable parts (to prevent a fault)

Fan blade, Fan motor, Switch.

3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its

pin is locked. And make sure that the wire leads
should not  come off even if the wire leads is pulled.

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

correctly, referring to the Pictorial Diagram.

To remove the outer case, proceed as follows.
1. Disconnect the oven from power supply.
2. Open the oven door and wedge it open.
3. To discharge the high voltage capacitor, wait for 60

seconds.

4. Remove the five (5) screws from the the rear cabinet.
5. Remove the  two (2) screws along the right and left

sides of outer case.

6. Slide the entire outer case back out about 2.5 cm to free

it from retaining clips on the cavity face plate.

Before removal of the high voltage transformer, high
voltage capacitor, high voltage rectifier, high voltage fuse,
magnetron, fan motor and turntable motor, the oven
cavity must be removed from base plate as follows.
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the outer case  (refer to "OUTER CASE

REMOVAL").

3. It is recommended that the door is removed from the

oven cavity. Refer to "DOOR REPLACEMENT".

4. Remove the the power supply cord  from the oven