Vintage Synth Repair

I don't have any schematics, but I would:
1) check PSU delivers all the required voltages. Adjust if necessary.
2) check the control voltages driving the VCF when all sliders down; you should find 0V. If not, check who delivers a voltage. Might be a blown tantalum, a common disease on ARP.

--- In vintagesynthrepair@yahoogroups.com, "Scott" <painintheamp@...> wrote:
>
> Hi...
> 
> New to the shop
> 
> Arp axxe 2310-631
> 
> OSC's are ok, Noise gen OK, S+H ok
> 
> VCF ..Not so much... VCF Freq and ADSR only want to "work" at Max excursion of sliders. In some situations , Release , on the envelope gen
> WONT release.
> 
> I have a service manual.
> 
> I'm a virgin to this unit so, be gentle.
>