HP 3150 manual Document scanner recalibration, Pressing VOLUME+CONTRAST

Document scanner recalibration

If copies, items scanned to the computer,

2or faxes you send have vertical black or white lines running through them, recalibration might be necessary.

Recalibrating the document scanner produces a calibration graph. Successful interpretation of the calibration graph is key to solving vertical black or white lines on scanned images.

To recalibrate the document scanner and interpret the calibration graph

1 Clean the HP LaserJet 3100/3150 product as detailed in Chapter 3, “Maintenance.”

2 Before reclaibrating the document scanner, open the document scanner and place a page that contains the black or white lines between the guides, just above the contact image sensor glass. The black or white line points to a portion of the glass that requires extra attention.

3 Clean the contact image sensor glass at the point indicated by the black or white line.

Note

If toner is the contaminant, you might have to scrape it off of the glass. Be careful not to scratch the glass.

4 Print a demonstration page by

pressing VOLUME+CONTRAST

simultaneously.

5 Copy the demonstration page.

186 Troubleshooting EN