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R403KKT

11 – 5

[12] DOOR SENSING SWITCH/PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH
REMOVAL

1. 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.

2. REINSTALLATION

1. Re-install each switch in its place. The primary interlock/ monitor

switches are in the lower position and the door sensing switch is in
the upper position.

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.

[13] DOOR SENSING SWITCH/PRIMARY 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, primary interlock switch and monitor switch
do not operate properly due to a misadjustment, the following adjust-
ment 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 primary 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 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.

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 primary 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.)

Figure C-3. Latch Switch Adjustments

[14] DOOR REPLACEMENT

1. REMOVAL

1. Disconnect oven from power supply.

2. Push the open button and open the door slightly.

Gap

Rotor