Monitor Test, Adjust Interlocks, Door Adjustment - GE SpaceMakerXL JMV1420 Technical Service Manual

MONITOR SWITCH TEST
Disconnect the oven from power supply. Before performing
this test, make sure that the primary interlock switch and
the power relay are operating properly.
The monitor switch is located between the top and bottom
interlocks. The monitor switch is operated indirectly by the
bottom latch pawl.
HOW TO TEST MONITOR:
1. Disconnect power, open control panel, and discharge
capacitor.
2. Disconnect monitor switch leads, and test at terminals:
Door closed---some Ohms (infinity)
Door open--0 Ohms
3. Reconnect switch wiring.
4. Test Circuit Operation:
A) Connect temporary jumper across relay contacts and
primary switch to simulate shorted switch contacts. Locate
convienent connections in circuit to be certain COM and
N.O. terminals are used.
B) Connect OHM meter (LOW scale) across the two line
terminals of appliance power cord.
Continuity must show:
Door Closed--some Ohms
Door open-- 0 Ohms
C) Remove 20 Amp. Fuse --Circuit must open ( Ohms). If
not, check wiring of monitor and interlock circuits.
5. WARNING: After test, remove temporary jumpers and
reconnect monitor switch leads.
DOOR SENSING, PRIMARY INTERLOCK AND
MONITOR SWITCH REMOVAL
This procedure should be followed when replacing
switches, otherwise they could be damaged.
1. Disconnect oven from power supply and remove outer
case.
2. Discharge high voltage capacitor.
3. Disconnect wire leads from the switch(es).
4. Remove two screws holding the interlock bracket to
component compartment flange.
5. Lift latch switch bracket assembly to release catch on
bracket (top of bracket) to flange.
How To Adjust Interlocks:
The switch housing is adjustable for door fit and switch
operation.
1. Disconnect power, open control panel, and discharge
capacitor.
2. Loosen both switch housing mounting screws at enlarged
holes in vertical flange.
3. Adjust switch housing for proper switch operation, and
door fit. Retighten screws.
MICROWAVE LEAKAGE TEST
A microwave leakage test MUST BE PERFORMED an time
a door is removed, replaced, disassembled, or adjusted for
any reason. THE MAXIMUM LEAKAGE IS 4MW/CM
GUIDELINES FOR ADJUSTMENT OF DOOR
SENSING, PRIMARY INTERLOCK AND
MONITOR SWITCH
If the door sensing 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 switch bracket
to the component compartment flange.
2. With door closed, adjust latch switch bracket by
moving it back and forth, and up and down. In and out
play of the door allowed by the upper and lower position
of the latch switch bracket should be less than 0.5mm
(.02"). The vertical position of the latch switch bracket
should be placed where the door sensing switch and
primary interlock switch have activated with the door
closed.
3. Firmly secure the screws with washers.
4. Check the door sensing switch operation. If the door
sensing switch has not activated with the door closed,
loosen screw and adjust the latch switch bracket.
After adjustment, check the following:
1. In and out play of door remains less than 0.5mm (.02")
when in latched position. First check upper position of
latch switch bracket, pushing and pulling upper portion of
door toward tile oven face. Then check lower portion of
the latch switch bracket, pushing and pulling lower
portion of the door toward the oven face. Both results
(movement of the door) should be less than 0.5mm
(.02").
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. Reinstall outer case and check for microwave leakage
around door with an approved microwave survey meter.
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