[sdiy] Pro One Issue/Question....

[James Elliott]

Thanks for the info Scott.

I'll try to check it out within the next couple days.

In the case that the pot is bad, does anyone know a suitable replacement (other than the originals at wine country sequential). I'm not saying that I wouldn't want to use a NOS part, I'm just looking for options.

Thanks,
Jim



----- Original Message ----
From: Scott Juskiw <scott at tellun.com>
To: James Elliott <johans121 at yahoo.com>
Cc: synth-diy at dropmix.xs4all.nl
Sent: Tuesday, July 15, 2008 7:09:12 PM
Subject: Re: [sdiy] Pro One Issue/Question....

Attack time is set by the voltage on pin 15 of U117 (CEM3310). Minimum  
attack suggests the voltage on that pin is stuck at 0 volts. There's  
not much connected to this pin that could go wrong, unless it's the  
3310 itself. Check for bad connections around R1206 and the attack  
pot. The voltage on pin 15 should go more negative as the attack pot  
is rotated CW.

On 13-Jul-08, at 9:50 PM, James Elliott wrote:

> Hello, the attack on my amp envelope on my pro one "died" the other  
> day (it is stuck on minimum attack). Any ideas as to what it might  
> be? The Decay, Sustain, and Release elements seem to function fine.
>
> Thanks,
> Jim