Disassembly Procedures
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
WARNI NG
!
©2005 Maytag Services 25 16026268
Monitor
Primary
Secondary
Mounting
screws
location
Latch Board Assembly for UCM1061*
CAUTION
!
Before replacing a blown monitor fuse, test the primary
interlock switch, secondary interlock switch, monitor
switch, and power relay contacts for proper operation.
If the monitor fuse is blown by a failed switch
operation, all switches, and printed circuit board must
be replaced.
Adjusting Interlocks
The interlock monitor, primary, and secondary switches
act as a final safety switch, protecting the operator from
microwave energy. After adjusting the interlock monitor
switches, verify they are correctly connected.
For door fit and switch operation, switch housing is
adjustable.
1. Disconnect power to unit and remove outer case, see
"Outer Case" procedure.
2. Remove control panel, see "Control Panel" procedure.
3. Loosen switch mounting screw on vertical flange.
4. Close oven door, move latch board upward toward
the top of the oven and/or away from the door latch
until gaps are less than
1
/6–inch (0.5 mm).
5. Hold latch board securely for proper switch operation
and door fit, retighten screws.
6. Open the oven door slowly, watching the switches.
Verify switches release in the following order.
• Primary interlock switch
• Secondary interlock switch
• Interlock monitor switch
NOTE: Adjust the latch board until all switches operate
in proper sequence.
7. Close the oven door slowly, watching the switches.
Verify switches activate in the following order.
• Interlock monitor switch
• Secondary interlock switch
• Primary interlock switch
8. When proper switch sequence has been achieved,
tighten the latch board securely.
CAUTION
!
A microwave leakage test must be performed anytime
a door assembly is removed, replaced, disassembled,
or adjustment of latch board is made.
Primary
switch
Adjustment
direction
Monitor
switch
Secondary
switch
High Voltage Capacitor
High voltage capacitor should always be discharged by
shorting a terminal to a chassis ground. The capacitor
has a internal "shunt" resistor, but the mechanical
discharge should always be performed to avoid personal
injury.
High Voltage Capacitor Removal
1. Disconnect power to unit and remove outer case, see
"Outer Case" procedure.
2. Discharge high voltage capacitor by connecting a
jumper wire to the terminal of high voltage capacitor
with the diode connected to it. Connect the other end
of the jumper wire to a well insulated screwdriver and
touch a chassis ground screw located close.
3. Remove screws securing capacitor bracket.
4. Slide capacitor mounting bracket out of the slots and
pull outward on capacitor, diode and bracket.
5. Reassemble in reverse order.
Diode
The diode is located next to the high voltage capacitor.
1. Disconnect power to unit and remove outer case,
see "Outer Case" procedure.
2. Discharge high voltage capacitor, see "High Voltage
Capacitor" procedure.
3. Disconnect diode wire terminal from high voltage
capacitor and remove screw securing diode to
ground.
4. Reassemble in reverse order.
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