VPI SDS output voltage

Hi Folks, I am still trying to get my HW19MKiV to work again. I got a new capacitor from VPI but motor still hums but does not turn. I am guessing my SDS is to blame so I measured the out put voltage to the turntable. At 72VAC steady state I get only 39VAC? If I reprogram to 115 max out put is 69VAC. Seems my SDS is acting up. Can anybody with a voltmeter please measure what voltage you get from the SDS? seems my SDS power amps are not working right.
Thanks, Riqe