Sharp R-320CD Service Manual page 35

1. Disconnect the power supply cord.
2. Remove turntable and turntable support from oven cavity.
3. Lay the oven on it's backside. Remove the turntable
motor cover by snipping off the material in four corners.
4. Where the corners have been snipped off bend corner
areas flat. No sharp edges must be evident after removal
of the turntable motor cover.
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect wire leads from the switches.
5. Remove two (2) screws holding latch hook to oven flange.
6. Remove latch hook assembly from oven flange.
7. Push outward on the two (2) retaining tabs holding switch
in place.
8. Switch is now free.
At this time switch lever will be free, do not lose it.
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH 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 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.
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 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
REMOVAL
1. Disconnect the power supply cord.
2. Push the open button and open the door slightly.
TURNTABLE MOTOR REMOVAL
5. Disconnect wire leads from turntable motor.
6. Remove two (2) screws holding turntable motor to oven
7. Now the turntable motor is free.
8. After replacement use the one (1) screw to fit the
Re-install
1. Re-install each switch in its place. The secondary
2. Re-connect wire leads to each switch.
3. Secure latch hook (with two (2) mounting screws) to
4. Make sure that the monitor switch is operating properly
2. The door sensing switch and secondary interlock switch
3. Monitor switch contacts close when door is opened.
4. Re-install outer case and check for microwave leakage
DOOR REPLACEMENT
3. Insert a putty knife (thickness of about 0.5mm) into the
33
(See "Positive lock connector removal")
cavity.
turntable motor cover.
interlock/monitor switches are in the lower position and
the door sensing switch is in the upper position.
Refer to pictorial diagram.
oven flange.
and check continuity of the monitor circuit.
chapter "Test Procedure" and Adjustment procedure.
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 door
toward the oven face. Both results (play in the door)
should be less than 0.5mm.
interrupt the circuit before the door can be opened.
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Door
Latch
Heads
Switch Lever
Figure C-3. Latch Switch Adjustments
gap between the choke cover and door frame as shown
in Figure C-4 to free engaging parts.
R-320CD/CK/CW
R-330CK/CW
Refer to
Latch Hook
Door Sensing
Switch
Monitor Switch
Secondary
Interlock Switch