[sdiy] OT: Hammond Organ

[Michael Ruberto]

I finally found some time to poke around inside my new T-524C spinet. 
Suprisingly, the guts all seem in good shape and remarkably clean - no dust 
at all! 1st time I powered it up there was grinding sounds inside, a 
constant loud hum from speakers, bottom manual dead, and the rythm unit 
could be heard faintly when the volume was alll the way down. I don't know 
the 1st thing about troubleshooting this monster. however, I've found that 
it likes air conditioning. after running the AC for awhile the lower manual 
started working, the grinding stopped, and the rythm unit finally shut up. 
the hum is still there and it seems to be coming from the bottom manual. 
Turning on Vibrato for the bottom manual affects the hum so I'm thinking 
it's a stuck note.

I really need information before I try fixing this any further. someone 
already thoughtfully provided me with schematics but I'm still looking for a 
source for the service manual, parts, and modifications. I very much 
appreciate any help here.

M.A. Ruberto