Original well scanned manual. Got the job done. Microwave problem found & corrected. For $5 and a new magnitron from ebay, it was a cheap and good the first shot fix. Electrical schematics allowed me to mage sure every thing else was ok before cutting and order for parts. Hard to live without.
Text excerpt from page 20 (click to view)
5. RF/Servo Circuit
A.
CHECK POINT(General)
Does signal goes "High" to IC201 Pin186 when the power is on?
NO
YES
Does signal pulse input to IC201 Pins 53, 54 when
the powe is on?