Testing Procedures - Maytag AMV6177AAB Service Manual

Testing Procedures

To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
High voltage
transformer
120 V
Primary
Magnetron
High Voltage
Capacitor
High Voltage Diode
Relay 8
Relay 10, 11
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Component
Discharge Capacitor
Disconnect connector and measure
continuity with meter on R x 1 scale:
Secondary
Filament
(Measure at room temperature, or 70° F)
0 V
Measure continuity with meter on "High"
scale: Primary winding to ground.............
Discharge Capacitor
Remove wires from magnetron and
connect ohmmeter to terminals. Also
check between each terminal and ground.
Discharge Capacitor
Remove wires from capacitor terminals
and connect ohmmeter, set on highest
resistance scale to terminals.
Also check between each terminal and
capacitor case.
Discharge Capacitor
Remove diode lead from capacitor and
connect ohmmeter.
Reverse leads for second test.
Disconnect the leads. Place water in the
oven and select power levels 1 through
10. Check continuity between the
terminals of the relays.
Disconnect the leads. Place water in the
oven and select Convection Cooking.
Check continuity between the terminals of
the relays.
16023057 Rev. 0
W ARNING
Test Procedure
Secondary.....................................
Filament ........................................
Primary .........................................
Filament winding to ground ...........
Results
Approximately 65-120 Ω
Less than 1 Ω
Less than 1 Ω
Infinite Ω
Infinite Ω
Between Terminals: Less than 1 Ω
Each terminal to ground: Infinite
resistance.
Note: This test is not conclusive. If
oven does not heat and all other
components test good replace the
magnetron and retest.
Between Terminals: Meter should
momentarily indicate several ohms,
then return to infinity. If no deflection
occurs, or if continuous deflection
occurs, replace capacitor.
Terminal to Case: Infinite resistance
Infinite resistance should be measured
in one direction and continuity in the
opposite direction.
NOTE: Ohmmeter must contain a
battery of 6 volts minimum.
Power Level Cycle On Cycle Off
1 4 sec
2 6 sec
3 8 sec
4 10 sec
5 12 sec
6 14 sec
7 16 sec
8 18 sec
9 20 sec
10 22 sec
Convection Convection
Cooking Start Cooking Stop
Continuity Open
18 sec
16 sec
14 sec
12 sec
10 sec
8 sec
6 sec
4 sec
2 sec
0 sec
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