HP (Hewlett-Packard) 1100dtn Manuale Utente

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The Print In Grayscale check box might be selected. From your application, open the 
Printer Properties dialog box. Click the Color tab and make sure that Print in Grayscale 
is not selected.

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When colors are completely wrong, the printer might have run out of one or more colors of 
ink. Check the status of the ink cartridges in the Toolbox or on the control panel, and then 
replace any low or empty ink cartridges. See 

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Whenever print quality noticeably decreases, it is a good idea to clean the printheads. To 
clean the printheads, open the Toolbox, click the Printer Services tab, and then click 
Clean Printheads. For Macintosh, use the control panel. See 

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Some media type settings (such as Transparency Films and Photo Papers) and print 
quality settings (such as Best) require more ink than others. Choose different print 
settings in the Print Settings dialog box. Also, make sure that you have selected the 
correct media type in the Print Settings dialog box.

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Make sure that the ink cartridges have not been tampered with. Refilling processes and 
the use of incompatible inks can disrupt the intricate printing system and result in reduced 
print quality and damage to the printer. HP does not guarantee or support refilled ink 
cartridges. For ordering HP supplies and accessories, see 

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The printheads on your printer are automatically aligned when a printhead is replaced. 
However, you might notice print quality improvement by performing the alignment 
procedure yourself. See 

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Use the zoom or print preview feature of your software to check for gaps in the placement 
of graphics on the page.

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The printheads or printhead contact pads might need cleaning. See 

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