a) Made sure the RES pot on the pcb is a 149 pot, and NOT a 148 pot. The
other 3 pots are 148s.
b) Make sure all the diodes are pointing the same way.
c) Make sure R10, 12 and R13 are 10K, and R11 is 1M, and R14 is 200K.
d) Use DVM: make sure U2 pin 7 goes from 0 to +10 as you turn the RES pot.
If not, I bet the coax
is shorted to ground on the RES jack or on the pcb.
Paul S.
----- Original Message -----
From: <robs7@...>
To: <motm@yahoogroups.com>
Sent: Monday, July 30, 2001 10:32 PM
Subject: [motm] 440 trouble shooting
> and I was doing so well with my first modules....
>
> Guys, my 440 wont resonate. Nothin. Nada. Everything else works fine.
Cutoff
> (although it does seem to go "silent" at about 4), FM, Inputs all ok. Bass
> enhance doesn't seem to make much differnece, but I am also running an
audio
> out from another synth into the 440, so perhaps that is the explination.
Or
> perhaps without the resonance, the bass enhance is not effective.
>
> Everything seems to be in the right place. All the solder looks ok to me.
Any
> suggestions on where to look?
>
> No, it wont self oscillate. No sound of resonance at all.
>
> Rob
>
>
>
>
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>
>