Door Interlock Switches - GE JVM1750 Technical Service Manual

Door Interlock Switches

The door has 3 interlock switches. All switches are
removed the same way.
Door Sensing and Primary Interlock Switches
The power relay is mounted on the smart board.
The primary interlock and door sensing switches
are activated by the latch heads on the door. When
the door is opened, the switches interrupt the
circuit to all components, except the oven lamp
and the control panel display. A cook cycle cannot
take place until the door is fi rmly closed, thereby
activating both interlock switches. The primary
interlock system consists of the door sensing switch,
the primary interlock switch, and the power relay.
Monitor Switch
The monitor switch is operated indirectly by the
bottom latch pawl. The pawl operates a cam switch,
which in turn, activates the monitor switch. The
switch is intended to render the oven inoperative
by means of blowing the monitor fuse when the
contacts of the primary interlock switch and power
relay fail to open when the door is opened.
Functions
When the door is opened, the monitor switch is
closed. At this time, the primary interlock switch and
the power relay are open.
As the door goes to a closed position, the monitor
switch is fi rst open and then the door sensing switch
and the primary interlock switch contacts close.
To remove the door interlock switches:
1. Disconnect wiring to the door switches.
3. Remove the 2 Phillips-head screws that attach
the door switch bracket to the microwave oven
frame and remove the door switch bracket.
4. Using a small fl at blade screwdriver, release the
tabs and remove the door interlock switch from
the door switch bracket.
– 24 –
Door Sensing
Disconnect
Monitor
Disconnect
Disconnect
Primary
Tab
Tab