HP 815MFP - Manual (Page 34)

28 hp designjet 815mfp & scanner 4200
1. Connect the scanner power cable.
2. Power ON the scanner.
The scanner should be warm. Make sure that the scanner has
been turned on for at least one hour prior to camera alignment
and calibration. Slight light intensity changes and camera
shifting can occur just after turning the scanner on and the
warm-up time will ensure that light conditions and camera
heights have stabilized.
3. Select the Setup tab.
4. Press the Scan Options button.
5. Press the Scanner Maintenance button to start the Scanner
Maintenance wizard.