how do I maintain/recover my system?

maintenance procedures

Maintenance procedures should all be performed in a single maintenance session, starting with Cleaning the scan area and ending with Camera alignment and calibration.

The scanner maintenance procedure should be performed once per month.

cleaning the scan area

1.Turn the scanner power off.

2.Disconnect the scanner power cable.

3.Open the scanner cover.

Place your fingers just inside the insertion slot and flip the cover upwards to expose the scan area.

4.Remove the pressure platen.

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hp designjet 815mfp & scanner 4200