Fatman problem

[Ian Vine]

On Mon, 10 Mar 1997, John Polischuk wrote:

> 
> Hello,
> 
> I'm new to analogue gear and DIY projects.  I recently just finished 
> putting together the Paia Fatman as my first project.  Everything seemed 
> to go together fine and I didn't have any soldering problems however I'm 
> having a hard time getting it working and was looking for some help 
> trouble shooting.  The unit powers up fine but there is a steady drone 
> coming out of the output once it's hooked up to the amp.  Sometimes when 
> I turn it on the light next to the gate which indicates a note is being 
> pressed and held comes on even when there is no MIDI attatchment.  I've 
> traced all my connections and there doesn't seem to be anything out of 
> place.  Any suggestions would be greatly appreciated!  
> 
> Thanks,
> John
> 
	Is the gate light on ? If it is and there is nothing connected
	to the midi in, it would seem to be a midi problem. Check out
	the digital section.

	If the gate light is off it may just be a problem with setting.

	There are two controls setting control voltages
	to the VCA, velocity and envelope (I think that's what it is called).
	Turn velocity to zero (fully counter clockwise) and turn the
	envelope level towards zero. At some point the output should stop.

	If you can't stop the output, check the components in the VCA
	and the envlope generator.

	Assuming the synth has gone quiet. Hook up a midi input, send 
	some notes, verfiy the gate light is flashing, you should hear
	something.

	Have you looked through the manuals fault finding section ? Its
	worth doing.

Iab