I would
not recommend an inexperienced measuring secondary voltage on the high voltage transformer! The filament winding produces about 3VAC but the high voltage winding produces well
over 2000VAC!
And that can be instantly lethal!I would only recommend measuring the resistance (in ohms) of the windings with power off and capacitor discharged.
We have the full service manual for this model and have uploaded it to our site
here to help you.
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The part number listed by the distributor for the high voltage transformer is RTRN-A527WRE0 (zero on the end, not "oh") which is the same number shown in the service manual.
The two continuity checks on a magnetron are across the filament terminals, which should read about zero ohms, and from each terminal to the case, which should read open or infinity.
Even if a magnetron passes these continuity tests, it can still be bad.
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