Vortex Sound Research

Hi, I'm a newb and just picked up a used unit with a Pittsburgh Modular Synthesizer Box in it and I can't figure out how to get the LFO to not modulate the VCO pitch. I've tried plugging something else into the V/O in jack and also plugging the LFO triangle out into other things. I'm wondering if anyone knows about this particular module. Or, if not, is there a general principle I'm missing when modules have default routing? Is this the right forum to be asking in? It doesn't seem like Pittsburgh Modular hosts a user forum, but I guess there might be one out there somewhere. Thanks!