[sdiy] Model D service

[Tony K]

The service manual and factory bulletins are indispensable, study those. Depending on condition, or use/ abuse it will probably need new keyboard bushings ( are the keys uneven? or make a 'clacking' sound?).

If older vco boards you will need a non-metalic alignment tool ( radio type set). You may need to do the keyboard Sample & Hold mod on older units ( bulletin for that) if you experience notes drooping (pitch changing on long decay/ release).
Oh wiring the spare side of the rotary switches in parallel is another good one - as extra insurance.

Fashion some tool to get in and GENTLY adjust those key supports - the manual mentions a specific tool, good luck finding that one ..;)

You will have to tune it with the cover on as pitch will change. 

Bunch more others will surely chime in here. Just remembering the ones I had to do. 

Not for the faint of heart esp. if this is a first synth. Much easier ones, i.e. Korg MS-20 is a cakewalk and no tempcos either !

Good Luck 

Tony K