In case anyone is still looking for the link to the Promix 01 service manual, I uploaded it to my server. http://www.koston.us/files/ypm01sm.pdf
The A/D converters are on the part list. Have fun.
If you want to initiate fader calibration, press and hold the ENTER button and power on the mixer.
To all of those who need a new fader with the motor, you can call yamaha parts department and they have them for $47. Though, I think that you can get a decent ALPS motorized fader of ebay for $27. I'm not sure which exact one is compatible, but some of them look exactly the same as the PM01's faders. They have different resistance options.
A little update.
I tested the Hosa (Caig) "fader lube" cleaner. Soldered out one of the malfunctioning sliders and applied it outside of the box. The effect is amazing... I've read many posts about fader lube destroying mixing desks but I must admit that it in my case it revived the sliders successfully. It might be a good idea to pull the faders out and open their little cases though, carefully clean and lube the tracks and the wiper and then put them back in. Worked like a charm.