Electrolux Microwave oven – How to remove Grill heating elements, Monitor switch and Door

Models: MCC4060E, MO940CXE, EMC4090X, ZM40STX/XM40STN
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
GRILL HEATING ELEMENTS REMOVAL

> Disconnect wire leads from the thermal cut-out (GRILL).
> Remove the two (2)screws holding the two (2) terminals of the main wire harness to the two (2) grill heating elements.
> Remove the one (1) screw holding the exhaust duct to the oven cavity top plate.
>  Remove the exhaust duct from the oven cavity top plate.
>  By pushing the two (2) tabs holding the grill reflector to the oven cavity top plate, slide the grill reflector toward the magnetron. And then lift up the grill reflector and remove it. Remove the one (1) screw holding the grill heater angle to the grill heater reflector.
>  Straighten the two (2) tabs of the grill heater angle and remove the grill heater angle from the grill reflector.
>  Remove the two (2) screws holding the earth plate to the two (2) grill heating elements.
>  Remove the two (2) grill heating elements from the grill reflector.
> Now, the grill heating elements are free.

MONITORED LATCH SWITCH, MONITOR SWITCH AND STOP SWITCH REMOVAL

> Remove the control panel assembly referring to "CONTROL PANEL ASSEMBLY REMOVAL".
> Disconnect the leads from all switches.
> Remove the two (2) screws holding the latch hook to the oven cavity.
> Remove the latch hook.
> Remove the switch(es) from the latch hook by pushing the retaining tab backwards slightly and turning the switch(es) on the post.
> Now the switch (es) is free.

MONITORED LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT

If the monitored latch switch, stop switch and monitor switch do not operate properly due to a mis-adjustment, the following adjustment should be made.
> Loosen the two (2) screws holding the latch hook to the oven cavity front flange.
> With the door closed, adjust the latch hook by moving it back and forward or up and down. In and out play of the door allowed by the latch hook should be less than 0.5 mm. The horizontal position of the latch hook should be placed where the monitor switch has activated with the door closed. The vertical position of the latch hook should be placed where the monitored latch switch and stop switch have activated with the door closed.
> Secure the screws with washers firmly.
> Make sure of the all switches operation. If the latch head has not pushed the plungers of the monitor switch with door closed, adjust the latch hook position. At that time, the latch head should have pushed the plungers of the monitored latch switch and stop switch. If the latch head has not pushed the plungers of the monitored latch switch and stop switch with door closed, loose two (2) screws holding latch hook to oven cavity front flange and adjust the latch hook position.

After adjustment, make sure of following:

1. In and out play of door remains less than 0.5 mm when latched position. First check the latch hook position, pushing and pulling upper portion of the door toward the oven face.  Then check the lower latch hook position, pushing and pulling lower portion of the door toward the oven face. Both results (play of the door) should be less

than 0.5mm.

2. The contacts (COM-NO) of the stop switch and the monitored latch switch open within 1.8mm gap between right side of cavity face plate and door when door is opened.

3. When the door is closed, the contacts (COM-NO) of the stop switch close.

4. When the door is closed the contacts (COM-NC) of the monitor switch and monitored latch switch open.  And the contacts (COM-NO) of their switches close.

5. Re-install outer case and check for microwave leakage around the door with an approved microwave survey meter.

DOOR REPLACEMENT

REMOVAL

1. Disconnect the oven from the power supply.

2. Push the door slightly.

3. Remove the door stopper from the choke cover.

4. Lift the door upwards.

5. Now, door assembly is free from oven cavity.

6. Insert an putty knife (thickness of about 0.5mm) into the gap between the choke cover and door frame as shown in Figure to free engaging parts.

8. Now choke cover is free.

9. Release choke cover from door panel.

DOOR PANEL
10. Remove the eight (8) screws holding the door panel to the door frame.
11. Now, door panel is free.
CAUTION: DO NOT DEFORM OR WARP THE TEETH OF COMB OF THE DOOR PANEL TO PREVENT MICROWAVE RADIATION EMISSION FROM THE DOOR LATCH HEAD AND SPRING
12. Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head.
13. Now, latch head and latch spring are free.
DOOR HANDLE
14. Remove the two (2) screws holding the door handle to the door frame.
15. Remove the door handle from the door frame.

RE-INSTALL
1. Re-install the door handle to the door frame as follows.
a) Insert the door handle to the door frame.
b) Hold the door handle to the door frame with the two (2) screws.
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.
4. Hold the door panel to the door frame with eight (8) screws.
5. Re-install choke cover to door panel by clipping into position.

RE-INSTALL
1. Re-install the door handle to the door frame as follows.
a) Insert the door handle to the door frame.
b) Hold the door handle to the door frame with the two (2) screws.
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.
4. Hold the door panel to the door frame with eight (8) screws.
5. Re-install choke cover to door panel by clipping into position.

After any service, make sure of the following

1. Door latch heads smoothly catch latch hook through latch holes and that latch head goes through centre of latch hole.

2. Deviation of door alignment from horizontal line of cavity face plate is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavity face plate.

4. Check for microwave leakage around door with an approved microwave survey meter

Note: The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle. This function does not require that door be air-tight, moisture (condensation)-tight or light-tight. Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves, indicate a leakage of microwave energy from oven cavity.

After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven.