HP Deskjet 6940 - Manual (Page 105)

Both a photo print cartridge and a tri-color print cartridge must be installed for color
calibration.
5. Reprint the photo.
6. If colors continue to appear tinted or incorrect, open the Printer Properties dialog
box, click the Color tab, and then click the Advanced color settings button.
7. Adjust the colors by using the Advanced color settings dialog box.
Horizontal lines appear on a photo
If light or dark horizontal lines appear on photos, follow this procedure:
1.
Clean the print cartridges.
2. Reprint the photo.
3. If horizontal lines still occur, align the print cartridges .
4. Reprint the photo.
Part of the photo is faded
If part of the photo is faded, follow these
guidelines .
Part of the photo is faded
Fading might occur on the edges or near the edges of a photo.
Fading occurs on the edges of a photo
User's guide 103