Pratica Chef Express Service Manual page 59

53
Door Switch Adjustments
LED lights are used on the control board to indicate the position of the contacts of the three door
switches. When the LED is illuminated, the switch position is opened and vice versa. The control board
identifies the LED's as SW1 (Primary) and SW2 (Secondary).
The LED's will illuminate when the over power is connected, (and the door is opened). The oven does
not need to be in the "ON" position to test the switch positions. Care should be taken when servicing
the oven with the power connected. Observe the LED's from a safe distance.
LED Lights
The Primary and Secondary switches are engaged with a single actuator attached to the right-side
hinge. Because of this design, the door position has a direct and precise relationship with the switch
contacts.
The actuator is a round post with a step machined into one side to allow for the Primary switch to
open before the Secondary switch (mounted beside it). This step is hardly noticeable due to its height
of 0.01" (0.25mm)
The two switches share the same adjustment and mounting hardware, but do not share the same
actuator surface. The 0.001" step allows for the required timing separation.