Sharp R-21JCA-F Service Manual Download Page 27

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R-21JCA-F

(B) An approved microwave survey meter should be used

to assure compliance with proper microwave radiation
emission limitation standards. (Refer to Microwave
Measurement Procedure.)

After any service, make sure of the following :

1. Door latch heads smoothly catch latch hook through latch

holes and that latch head goes through center of latch hole.

2. Deviation of door alignment from horizontal line of cavity

face plate is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face

plate.

4. Check for microwave leakage around door with an approved

microwave survey meter. (Refer to Microwave Measurement
Procedure.)

Note: The door on a microwave oven is designed to act as

an electronic seal preventing the leakage of microwave
energy from oven cavity during cook cycle. This
function does not require that the door be air-tight,
moisture (condensation)-tight or light-tight. Therefore,
occasional appearance of moisture, light or sensing
of gentle warm air movement around oven door is not
abnormal and do not in themselves indicate a leakage
of microwave energy from oven cavity.

REMOVAL

1. Disconnect the power supply cord.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
4. Remove the antenna motor from the oven cavity bottom plate,

referring to "ANTENNA MOTOR REMOVAL" .

5. Remove the ceramic shelf from the oven cavity bottom

plate.

6. Remove the one (1) screw and the one (1) washer holding

the antenna holder of the stirrer antenna assembly to the
oven cavity bottom plate through the square hole of the
stirrer antenna. Refer to Figure C-8.

7. Release the antenna holder from the one (1) tab of the oven

cavity bottom plate.

8. Remove the stirrer antenna assembly from the oven cavity

bottom plate.

9. Remove the antenna motor shaft from the hole of the oven

cavity bottom plate.

10. Now, the antenna motor shaft is free.

Figure C-8. Antenna Motor Shaft Removal

ANTENNA MOTOR SHAFT REPLACEMENT

Upper Oven
Hinge

Upper
Oven
Hinge

Lower
Oven
Hinge

Choke Cover

Slit
Chok

Door
Panel

INSTALLATION
1. Install the antenna motor shaft into the hole of the oven

cavity bottom plate, and turn the flat faces of antenna motor
shaft to the left and right side walls of oven cavity (to fit the
stirrer antenna holder). Refer to Figure C-9.

2. Set the direction of the stirrer antenna and antenna holder

so that the hole of the antenna holder fit to the centre of the
stirrer antenna's big blade. Refer to Figure C-9.

3. Hook the hole of the antenna holder on the tab of the oven

cavity bottom plate. Refer to Figure C-10.

4. Insert the antenna holder into the hole of the oven cavity

bottom plate and fit the hole of the antenna holder with an
antenna motor shaft. Refer to Figure C-10.

5. Install the antenna holder to the oven cavity bottom plate

with the one (1) screw and the one (1) washer. Refer to
Figure C-8.

6. Install the antenna motor to the oven cavity bottom plate with

one (1) screw. Refer to Figure C-8.

7. Connect the wire leads to the antenna motor, referring to the

pictorial diagram.