Kuppersbusch MW 800.0, Руководство по обслуживанию

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24 Service Manual MWG 1000
Only for internal use
4.1 Component testing
4.1.1 Magnetron filament
Disconnect the appliance from the mains and discharge
the HV capacitor.
Then disconnect the high-voltage leads from the filament
terminals of the magnetron and measure the resistance
at the two filament terminals of the magnetron.
The correct reading should be less than 1 ohm.
If the resistance is high or infinite the magnetron must be
exchanged.
Short magnetron test
Connect the ohmmeter between the filament terminals of the magnetron and the case.
The reading on the ohmmeter should indicate an infinite resistance.
A low resistance means that there is a ground contact in the magnetron. In this case the magnetron must
be exchanged.
Note : When exchanging the magnetron please ensure that:
♦
you do not interchange the connection leads at the magnetron terminals
♦
you do not use the appliance if the RF gasket is missing or damaged. This gasket
surrounds the dome of the magnetron and prevents microwave leakage from
occurring.
Warning : When exchanging the magnetron you must ensure that the dome is not scratched by
metal parts, as even the smallest metal splinters on the ceramic dome can considerably
shorten the lifetime of the magnetron.
RF-gasket
Magnetron dome