On the Xerox 8560MFP multifunction, this error code 39,003 signifies a Scanner problem, specifically that the Optical Test has failed. the 75554 is your current page count on the printer.
The Scanner Assembly 062K22590 must be replaced. It is fairly expensive, but moderately easy to replace.
You should also order the Scanner Calibration Sheet 109K01910 to make sure that margins and contrast are correct.
The scan/ document section is broken into 2 main parts, the Scanner, and the Automatic Document feeder. The feeder section is probably working fine.
Good luck with that.
Whit
Item, Inc.
Alexandria, VA