SergeModular

Hi,
Just got my two-panel Serge in the mail, yesterday and I'm having a
blast. I suspect there's something wrong with the Dual Phaser,
however. Here's what I'm experiencing.
First, the top sections Phase and Phase VC knobs seem to have no
effect no matter what signal I run through there nor what output I
choose. Second, the lower section exhibits some strange behavior as
well. I route a signal into it and then another signal into the VC IN.
If the VC knob is all the way to the left, it effectively STOPS the
signal that's routed into the VC In! DTGs, VCOs, 2RVG -- anything
plugged in there stops -- until I turn the VC knob just slightly
clockwise or more. This section of the 2PHA works fine, otherwise.
Anyone know what tha cause might be, or where to look for a solution?
My dad is an EE with a lot of experience troubleshooting but without
a schematic, it might be tough-going. My thought is that it's a
twofold problem -- loose connection in the top section, maybe a bad
resistor? And a short in the lower section. I'm no EE, so I'm
guessing, here.
Thanks!
Matt