Sharp R-870B, Service Manual

Page: 34 / 48

32
R-870B
Upper Oven
Hinge
Upper
Oven
Hinge
Lower
Oven
Hinge
Lower
Oven
Hinge
Pin
Pin
Choke Cover
Door
Panel
Figure C-6. Door Replacement
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Push the open button and open the door slightly.
3. Insert an putty knife (thickness of about 0.5mm) into the
gap between the choke cover and door frame as shown
in Figure C-5 to free engaging parts.
4. Pry the choke cover by inserting a putty knife as shown
in Figure C-5.
5. Release choke cover from door panel.
6. Now choke cover is free.
Figure C-5. Door Disassembly
7. Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
8. Now, door sub assembly is free from oven cavity.
9. Remove the four (4) screws holding the door panel to
the door frame.
10.Release door panel from seven (7) tabs of door frame
by sliding door panel downward.
11.Now, door panel is free.
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.
14.Remove the two (2) screws holding the glass stopper
to the door frame.
15.Remove the glass stopper from the door frame.
16.Slide the front door glass left and then slide upwards
to release the tabs holding it.
17.Now, the front door glass is free
RE-INSTALL
1. Re-install the front door glass to the door frame as
follows.
1) Insert the lower edge of the front door glass into the six
(6) tabs of the door frame.
2) Slide the front door glass upwards and insert the upper
edge of the front door glass into the five (5) tabs of the
door frame.
3) Slide the front door glass righ and insert the right
edge of the front door glass into the two (2) tabs of the
door frame.
2. Re-install the glass stopper to the door frame as
follows.
1) Re-install the glass stopper to the door frame so that
the two (2) holes of the glass stopper meet the two (2)
pins of the door frame.
2) Hold the glass stopper to the door frame with the two
(2) screws.
3. Re-install the latch spring to the latch head. Re-install
the latch spring to the door frame. Re-install latch head
to door frame.
4. Re-install door panel to door frame by fitting seven (7)
DOOR REPLACEMENT
tabs of door frame to seven (7) holes of door panel.
5. Hold the door panel to the door frame with four (4)
screws.
6. Catch two (2) pins of door panel on two (2) hole of upper
and lower oven hinges.
7. Re-install choke cover to door panel by pushing.
Note: After any service to the door;
(A) Make sure that door sensing switch and primary
latch switch are operating properly. (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.
(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 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 in
themselves indicate a leakage of microwave en-
ergy from oven cavity.
Putty Knife
Door Frame
Choke Cover