VPI SDS 45 RPM malfunction


I have a brand new SDS unit that I've used for about a month now and it's been working fine at 33 rpm, but last weekend I tried to put on a 45 rpm record and the unit malfunctioned. I was able to adjust the frequency up to 80.80 Hz, which the strobe indicated resulted in correct speed, but the voltage would flicker between 72 and 115 V for several seconds and settle at 72. It seemed the turntable was holding speed at 72, but when I put the record on and the periphery ring, the SDS kept going back and forth in frequency between 33 and 45 (up and down between approx. 60 to 80 Hz and the motor would audibly "slip" when the SDS got to 80.80 Hz and then started going back down).

Is this a matter of adjusting the unit or is the unit broken? I sent an email to VPI, but I know they are very busy so I thought in the meantime I'd ask here. Any ideas or suggestions?
actusreus
It is easy to set the voltage drop. Just read the manual, 72 volts is too low to reliably run 45 RPM on my SDS as well. Try a higher setting , it worked well for me.
If I can re-set it myself, why would I send it back to VPI and wait for who knows how long to get it back, new unit or not? Btw, the calibration manual may as well have been written in Chinese. I can't possibly follow it, but at the same time it cannot be that complicated since adjusting voltage only involves user accessible front panel buttons, as far as I understand. Anyone here can provide a quick tutorial? It'd be greatly appreciated.