If you can't locate a schematic then the next step would be to draw your own starting at the speakers and showing the wires and their colors all the way...

First step would be to clean all the bus bars, bus bar contacts and switches with a contact cleaner like deoxit. I'm sure you'll be amazed at just how...

This organ has one set of flute (sine wave) oscillators. Non-flute voices are just various pitch combinations of the flutes, e.g. Clarinet 8' consists...

I don't know what year Allen started producing the inline tone generators. Those are easy to service, once you determine it is a dead note instead of...

Hi & thanks for the above replies which I've tried but to no avail. I've got a technician coming next week to take a look but he doesn't hold out...