Door Sensing Switch/Secondary Interlock Switch And Monitor Switch Adjustment; Door Replacement - Sharp R-305MR Service Manual

2. REINSTALL
1. Reinstall each switch in its place. The secondary interlock/monitor
switches are in the lower position and the door sensing switch is in
the upper position.
[13] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH
ADJUSTMENT
1. Adjustment
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
If the door sensing switch, secondary interlock switch and monitor
switch do not operate properly due to a misadjustment, the following
adjustment should be made.
4. Loosen the two (2) screws holding latch hook to the oven cavity
front flange.
5. 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 door sensing switch and secondary interlock switch are acti-
vated 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.
6. Secure the screws with washers firmly.
7. Check the operation of all switches. If each switch has not activated
with the door closed, loosen screw and adjust the latch hook posi-
tion.
2. 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.

[14] DOOR REPLACEMENT

1. REMOVAL
1. Disconnect the power supply cord.
2. Open the door slightly.
3. Insert a 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 Figure C-5.
5. Release choke cover from door panel.
6. Now choke cover is free.
NOTE: When carrying out any repair to the door, do not bend or
warp the slit choke (tabs on the door panel assembly) to
prevent microwave leakage.
7. Release two (2) pins of door panel from two (2) holes of upper and
lower oven hinges by lifting up.
8. Now, door panel is free from oven cavity.
9. Remove the four (4) screws holding the door panel to the door
frame.
2. Reconnect wire leads to each switch. 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. Refer to chapter "Test Procedure"
and Adjustment procedure.
Then check lower portion of the latch hook, pushing and pulling
lower portion of the door toward the oven face. Both results (play in
the door) should be less than 0.5mm.
2. The door sensing switch and secondary interlock 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 Micro-
wave Measurement Procedure.)
Door
Latch
Heads
Switch Lever
Figure C-4. Latch Switch Adjustments
C hoke C over
Figure C-5. Door Disassembly
10.Release door panel from ten (10) tabs of door frame.
11. Now, door panel with sealer film is free.
12.Tear sealer film from door panel.
13.Now, door panel is free.
14.Slide latch head upward and remove it from door frame with releas-
ing latch spring from door frame and latch head.
15.Now, latch head and latch spring are free.
16.Remove door screen from door frame.
11 – 6
R305MR
Latch Hook
Door Sensing
Switch
Monitor Switch
Secondary
Interlock Switch
Door F rame
P utty K nife