Xerox 7845 Touch Screen Calibration

[drewzif]

I need to calibrate a 7845 touch screen. There is a combination of keys to hold so it boots to calibration, any ideas?

Note i tried the 7545 calibration instructions a month ago with no luck, can't seem to find them now either to reference.

[xcopytech]

Same as for 75xx series.
Press and hold *,# and C