Antenna Motor Shaft Replacement - Sharp R-21LTF Service Manual

R21LTF
Choke Cover
Figure C-6. Door Disassembly
7. Release two (2) pins of door panel from two (2) holes of upper and
lower oven hinges by lifting up.
8. Remove the one (1) cushion (ferrite) from the lower opening
between the door panel and the door frame.
9. Now, door sub assembly is free from oven cavity.
DOOR PANEL REMOVAL
10.Remove the four (4) screws holding the door panel to the door
frame.
11.Release door panel from seven (7) tabs of door frame by sliding
door panel downward.
12.Now, the door panel is free.
DOOR HANDLE REMOVAL
13.Release the latch spring from the tab of the latch angle assembly.
14.Remove the two (2) screws holding the door handle and the latch
angle assembly through the door frame.
15.Now, door handle is free.
LATCH HEADS REMOVAL
16.Remove the one (1) screw holding the latch angle assembly to the
door frame.
17.Remove the latch angle assembly together with the latch lever,
latch spring and the upper and lower latch heads from the door
frame.
18.Release the latch lever together with the latch spring and the latch
heads from the latch angle assembly.
19.Release the two (2) latch heads from the latch lever.
20.Now, the upper and lower latch heads are free.
FRONT DOOR GLASS OR SEALER PLATE REMOVAL
(After DOOR PANEL REMOVAL)
1) Remove the four (4) screws holding the glass stopper U to the door
frame and remove the glass stopper U.
2) Remove the two (2) screws holding the glass stopper R to the door
frame and remove the glass stopper R.
3) Slide the front door glass and the sealer plate left at first and then
slide upwards to release them from the tabs holding it.
4) Now, the front door glass or the sealer plate free.
DOOR CASE REMOVAL
(After DOOR PANEL REMOVAL)
1) Straighten all tabs of the door case holding the door case to the
door frame.
2) Release door case from the door frame.

[15] ANTENNA MOTOR SHAFT REPLACEMENT

1. REMOVAL
1. Disconnect the power supply cord.
Putty Knife
Door Frame
3) Now, the door case is free
NOTE: At this moment, the door badge is attached on the door case.
2. REINSTALL OF THE DOOR
1. Reinstall all door parts except the choke cover
2. Catch two (2) pins of door panel on two (2) holes of upper and
lower oven hinges.
3. Insert the one (1) cushion (ferrite) into the lower opening between
the door panel and the door frame.
4. Reinstall choke cover to door panel by pushing.
NOTE: After any service to the door;
1) Make sure that door sensing switch, secondary inter-
lock switch and monitor switch are operating properly.
(Refer to chapter "Test Procedures".).
2) An approved microwave survey meter should be used
to assure compliance with proper microwave radiation
emission limitation standards. (Refer to chapter "Test
Procedures".)
3. 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 micro-
wave 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 door be air-tight, moisture (conden-
sation)-tight or light-tight. Therefore, occasional appear-
ance of moisture, light or sensing of gentle warm air
movement around oven door is not abnormal and do not
of themselves, indicate a leakage of microwave energy
from oven cavity.
Pin
Cushion
(Ferrite)
Pin
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
11 – 6
Upper
Oven
Hinge
Upper Oven
Hinge
Lower
Oven
Door
Hinge
Panel
Slit
Chok
Choke Cover
Lower
Oven
Hinge
Figure C-7. Door Replacement