Sharp R-390B Service Manual page 25

Re-install
1. Re-install each switch lever and latch switch in its
place. The 1st. latch /stop/monitor switches are in the
lower position and the 2nd. latch switch is in the upper
position.
2. Re-connect wire leads to each switch.
1ST. LATCH SWITCH, 2ND. LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT
If the 1st. latch switch, 2nd. latch switch, stop switch and
monitor switch do not operate properly due to a
misadjustment, the following adjustment should be made.
1. Loosen the two (2) screws holding latch hook to the
oven cavity front flange.
2. With door closed, adjust latch hook by moving it back
and forth, and up and down. In and out play of the door
allowed by the upper and lower position of the latch
hook should be less than 0.5mm. The vertical position
of the latch hook should be adjusted so that the 1st.
latch switch, 2nd. latch switch and stop switch are
activated with the door closed. The horizontal position
of the latch hook should be adjusted so that the plunger
of the monitor switch is pressed with the door closed.
3. Secure the screws with washers firmly.
4. Check all switches operation. If each switch has not
activated with the door closed, loosen screw and adjust
the latch hook position.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when
in the latched position. First check upper position of
latch hook, pushing and pulling upper portion of door
toward the oven face. Then check lower portion of the
latch hook, pushing and pulling lower portion of the
REMOVAL
1. Disconnect oven from power supply.
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-8 to free engaging parts.
4. Pry the choke cover by inserting a putty knife as shown
Figure C-8.
5. Release choke cover from door panel.
6. Now choke cover is free.
7. Release two (2) pins of door panel from two (2) holes
of upper and lower oven hinges by lifting up.
8. Now, door assembly is free from oven cavity.
Choke Cover
13
11
12
10
7
9
8
Figure C-8. Door Disassembly
DOOR REPLACEMENT
1
2
3
4
5
6
Door Frame
Putty Knife
Refer to "PICTORIAL DIAGRAM".
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit.
chapter "Test Procedure" and "Adjustment procedure".
door toward the oven face. Both results (play in the
door) should be less than 0.5mm.
2. The 1st. latch switch, 2nd. latch switch and stop switch
interrupt the circuit before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to "Microwave Measurement Procedure".)
Latch
Heads
Switch
Lever
Figure C-7. Latch Switch Adjustments
9. Release door panel from seven (7) tabs of door frame
by sliding door panel downward.
10.Now, door panel with sealer film is free.
11.Tear sealer film from door panel.
12.Now, door panel is free.
13.Slide latch head upward and remove it from door frame
with releasing latch spring from door frame and latch
head.
14.Now, latch head and latch spring are free.
15.Remove door screen from door frame by releasing two
(2) tabs.
16.Now, door screen is free.
RE-INSTALL
1. Re-install door screen to door frame by fitting two (2)
tabs of door frame to two (2) holes of door screen.
2. 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.
3. Re-install door panel to door frame by fitting seven (7)
tabs of door frame to seven (7) holes of door panel.
4. Hold the door panel to the door frame by sliding the
door panel upward.
5. Put sealer film on door panel. Refer to "Sealer Film"
23
R-390B
Refer to
Door
Latch Hook
2nd. Latch
Switch
Monitor
Switch
1st. Latch
Switch
Stop
Switch