I just wanted to add that the belt does not slip at 33 RPM at all, and the platter holds the speed fine.
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Go to VPI's website and download the SDS calibration manual. In the manual are detailed instruction on how to adjust the SDS "steady state" voltage (run mode). For 45rpm, the factory default should be either 90 or 102 depending on the software version. If your SDS is dropping from 115v to 72 v after startup when in the 45rpm setting, it needs to be adjusted higher. You cannot hurt your table by trying a higher steady state voltage. I hope this corrects your problem
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.
Turn off the unit and disconnect it from the turntable.
your fingers on both arrow buttons, turn the unit on.
your fingers from the arrows within two seconds of turning
on and seeing, "CAL" displayed on the left. Press
the RPM selector button repeatedly, until, "C5" is
displayed on the left and the run voltage on the right. Use
the UP/DOWN arrows to select the voltage you desire(I'm
using 102V). Press the RPM button again, to return to,"CAL"
in the left display, and press an arrow button to exit the
If your unit doesn't allow you to set your desired
voltage(probably higher than mine), send it
back to VPI.
The unit appears to be broken, strangely for the 45 RPM function only. I tried to recalibrate it, and it was factory-set to 102V for 45, which should work fine. I increased the voltage to 115V to see if that would do the trick, and the result was the same. Thanks all for your feedback and suggestions.