Testing Procedures
! | WARNING | Disconnect power before performing the following |
procedures unless testing requires it. | ||
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NOTES: |
| Interlock Monitor Switch Test |
•Perform microwave energy leakage test if unit is serviced for any reason.
•Verify wire leads are connected to correct positions.
•When removing wire terminal plugs from connectors, grasp the connector, not the wires.
Primary Interlock Switch Test
When the door is opened slowly, an audible click should be heard. If the latch does not activate the switch when the door is closed, the switch should be adjusted in accordance with the adjustment procedure.
1.Disconnect power to oven and remove control panel, (see “Control Panel” section in Disassembly Procedure).
2.Discharge high voltage capacitor, (see "High Voltage Capacitor" section in Disassembly Procedure).
3.Disconnect wire leads from switch.
4.Perform a continuity test by connecting one meter lead on COM terminal and the other meter lead on NO terminal.
Readings should be as follows: Door closed ................. 0 ohms Door opened ............... Infinite ohms
When the door is opened slowly, an audible click should be heard. If the latch does not activate the switch when the door is closed, the switch should be adjusted in accordance with the adjustment procedure.
1.Disconnect power to oven and remove control panel, (see “Control Panel” section in Disassembly Procedure).
2.Discharge high voltage capacitor, (see "High Voltage Capacitor" section in Disassembly Procedure).
3.Disconnect wire leads from switch.
4.Perform a continuity test by connecting one meter lead on COM terminal and the other meter lead on NC terminal.
Readings should be as follows: Door closed ................. Infinite ohms Door opened ............... 0 ohms
NOTE: When replacing component use identical replacement part.
NOTE: After repairing the door or the interlock system, it is necessary to do a continuity test before operating the oven.
NOTE: When replacing component use identical replacement part.
NOTE: After repairing the door or the interlock system, it is necessary to do a continuity test before operating the oven.
Secondary Interlock Switch Test
When the door is opened slowly, an audible click should be heard. If the latch does not activate the switch when the door is closed, the switch should be adjusted in accordance with the adjustment procedure.
1.Disconnect power to oven and remove control panel, (see “Control Panel” section in Disassembly Procedure).
2.Discharge high voltage capacitor, (see "High Voltage Capacitor" section in Disassembly Procedure).
3.Disconnect wire leads from switch.
4.Perform a continuity test by connecting one meter lead on COM terminal and the other meter lead on NO terminal.
Readings should be as follows: Door closed ................. 0 ohms Door opened ............... Infinite ohms
NOTE: When replacing component use identical replacement part.
NOTE: After repairing the door or the interlock system, it is necessary to do a continuity test before operating the oven.
Magnetron
1.Disconnect power to oven and remove control panel, (see “Control Panel” section in Disassembly Procedure).
2.Discharge high voltage capacitor, (see "High Voltage Capacitor" section in Disassembly Procedure).
3.Disconnect wire leads to magnetron.
4.Measure the resistance across filament terminals of the magnetron.
Reading should be less than 1 ohm.
5.Measure the resistance from each filament terminal to ground. Reading should indicate infinite ohms.
NOTE: Any other readings then what should be indicated, magnetron needs to be replaced.
NOTE: Replace the magnetron, if magnetron indications are good and all other high voltage components test good, but the unit still does not heat a load.
High Voltage Transformer
1.Disconnect power to oven and remove control panel, (see “Control Panel” section in Disassembly Procedure).
2.Discharge high voltage capacitor, (see "High Voltage Capacitor" section in Disassembly Procedure).
3.Disconnect wire leads to high voltage transformer.
©2002 Maytag Appliances Company | 9 | 16021668 Rev. 0 |