Component Teardown
4-9
Third Door Switch, Door Sensing
Switch, Primary Interlock Switch And
Monitor Switch Removal
Removal
1. Disconnect the oven power supply cord and remove
outer case.
2. Discharge high voltage capacitor.
3. Remove the control panel assembly, refer to “Control
Panel Removal”.
4. Disconnect wire leads from each of the switches and
fuse holder.
5. Remove two (2) screws holding latch hook to oven
flange.
6. Remove latch hook assembly from oven flange.
7. Push outward on the one (1) stopper tabs holding
each of switches place.
8. Switch is now free.
Reinstall
1. Re-install switch lever and each interlock switch in its
place. The primary interlock switch is in the lower
position and the door sensing switch and third door
switch are in the upper position and the monitor
switch is in the middle position.
2. Re-connect wire leads to each switches and fuse
holder. 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.
To discharge the high voltage capacitor, wait for 60
seconds and then short-circuit the connection of
the high-voltage capacitor (that is the connecting
lead of the high-voltage rectifier) against the
chassis with the use of an insulated screwdriver.
Third Door Switch, Door Sensing
Switch, Primary Interlock Switch And
Monitor Switch Adjustment
If the door sensing switch, third door switch, primary
interlock 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 latch hook should be less than .5mm.
The vertical position of latch hook should be adjusted
so that the door sensing switch and primary interlock
switch are activated with the door closed. The hori-
zontal position of the latch hook should be adjusted
so that the plungers of the monitor switch and the
third door switch are pressed with the door closed.
3. Secure the screws with washers firmly.
4. Check all switch operations. If each switch has not
activated with door closed, loosen screw and adjust.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm at
the latched position.
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. Third door switch contacts open when door is
opened.
5. Re-install outer case and check for microwave
leakage around door with an approved microwave
survey meter. (Refer to Section 1)
Figure 4-6. Latch Switch Adjustments
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