[sdiy] Non-DIY, but looking for repair advice...

[John]

On Mon, 13 May 2024 07:20:56 -0700
John Ames <commodorejohn at gmail.com> wrote:

> > - Does an external signal and/or noise come through full level?  If
> > so, that would point to a VCO or buffer fault.  
> 
> This is an interesting one. Noise comes through at about the same
> level as the oscillator, but if I patch one of the oscillators on my
> kARP 2600m directly to the external in, it is *much* louder, drowning
> out the CS-15's VCO almost entirely. Hmm...

(*CS-5,* duh.)

Re-thinking this - looking at the CS-5 service manual, the VCO level at
the source mixer is only ~0.4V p/p while the 2600's oscillators are
0-10V, so I guess that's not as indicative as I might've thought...