Pratica Chef Express, Service Manual

Page: 60 / 122

54
MICROWAVE SYSTEM
The proper distance to adjust the P rimary and Secondary switches is 0.040” (1.0mm). This distance is
measured between the switch body and the metal paddle. At this distance, the opening sequence of
the three switches is correct and the microwave emission are well within the safety specifications.
The Monitor switch is located on the left side of the oven and is actuated in the same manner. The
proper distance to adjust the Monitor switch is 0” (0mm). This switch is to be adjusted fully closed to
support the Primary and Secondary switch contacts opening first.
Primary and Secondary switch adjustment steps:
1) Open and close the door to verify the door moves freely and fully closes. The door springs
must be pulling the door closed to the oven cavity.
2) Remove both sides and the top cover top access the LED and the switches.
3) Loosen the #2 Phillips screw on the mounting bracket and the two #1 Phillips screws holding
the switch body.
4) Place a 0.040” (1.0mm) gauging tool between the switch body and the metal paddle.
5) Confirm the adjustment is correct and tighten mounting hardware.
6) Open and close the door while checking the sequence of de LED lights on the control board,
SW1 first, SW2 second, and SW3 is last to switch off when the door is opened.
7) Install a thread locking material to the mounting hardware (Optional).
Monitor switch adjustment steps:
Same as above with one exception: Change the dimension in step 4 above to 0” (0mm). This switch
must be fully closed when the door is in the closed position.
Refer to page 74 for proper microwave leak testing procedures.
An RF leakage test should be performed after the following service tasks:
•
Door removal, replacement and/or adjustment
•
Waveguide removal and/or replacement
•
Magnetron removal and/or replacement
•
Door switch adjustment and/or replacement