Sharp R-933 Service Manual page 33

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
REMOVAL
1. Disconnect the oven from the power supply.
2. Push the door slightly.
3. Remove the door stopper from the choke cover.
4. Lift the door upwards.
5. Now, door assembly is free from oven cavity.
6. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-7 to free engaging parts.
7. Release choke cover from door panel.
8. Now choke cover is free.
Figure C-7. Door Disassembly
DOOR PANEL
9. Remove the six (6) screws holding the door panel to the
door frame.
10.Release door panel from door frame by lifting up the
door panel.
11.Now, door panel is free.
LATCH HEAD AND SPRING
CAUTION: DO NOT DEFORM THE TEETH OF COMB
OF THE DOOR PANEL TO PREVENT
MICROWAVE RADIATION EMISSION
FROM THE DOOR.
12.Slide latch head upward and remove it from door
frame with releasing latch spring from door frame and
latch head.
13.Now, latch head and latch spring are free.
DOOR HANDLE AND FRONT DOOR GLASS
14.Remove the three (3) screws holding the door handle
to the door frame.
15.Remove the door handle from the door frame.
16.Slide the front door glass rightwards and then remove
it.
17.Now, the front door glass is free
RE-INSTALL
1. Re-install the front door glass to the door frame as
follows.
a) Insert the front door glass into the door frame.
b) Slide the front door glass leftwards.
2. Re-install the door handle to the door frame as follows.
a) Insert the door handle to the door frame.
b) Hold the door handle to the door frame with the
three (3) screws.
3. Re-install the latch spring to the latch head. Re-install
the latch spring to the door frame. Re-install latch head
DOOR REPLACEMENT
Door stopper
Putty knife
Choke cover
Door frame
to door frame.
4. Re-install door panel to door frame.
5. Hold the door panel to the door frame with six (6)
screws.
6. Re-install choke cover to door panel by clipping into
position.
7. Locate door panel hinge pins into cavity hinge location
holes.
8. Re-install the door stopper to the chock cover
Note: After any service to the door;
(A) Make sure that the monitor switch, monitored
latch switch and stop switch are operating prop-
erly. (Refer to chapter "Test Procedures".).
(B) An approved microwave survey meter should be
used to assure compliance with proper micro-
wave radiation emission limitation standards. (Re-
fer 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 centre 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 Micro-
wave 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 (condensation)-tight or light-
tight. Therefore, occasional appearance of mois-
ture, light or sensing of gentle warm air movement
around oven door is not abnormal and do not of
themselves, indicate a leakage of microwave en-
ergy from oven cavity.
Pin
Door
assembly
Pin
Figure C-8. Door Replacement
31
Upper oven hinge
Lower
oven
hinge
Lower oven
hinge