[sdiy] ARP2601 question

[Bob Weigel]

I just have the 2600 downloads of course on this.  I have an odd thing 
that might be just something not configured right etc.  Both speakers 
make good sound..but

1) pan to the right and all sound pans to zero.

2) You can put a plug in the left in, tap and get a buzz..not so in the 
right in

3) neither reverb works at the moment..it appears there is reverb amount 
to right and left or am I misunderstanding those controls?

Anyway if someone knows of a correct schematic for that section I'd 
appreciate it...or any quick hint on that issue. Maybe it's hacked into 
a mono mode or something but the speaker connectors go to their original 
place on the board it appears. -Bob