HP 3000dtn - Manual (Page 132)

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To clean the printheads
Note Cleaning the printheads takes several minutes.
1 Press (select button) on the LCD control panel.
2 Press (down arrow button) to highlight CONFIGURE DEVICE ,
and then press (select button).
3 Press (down arrow button) to highlight PRINT QUALITY ,
and then press (select button).
4 Press (down arrow button) to highlight CLEAN PRINTHEADS ,
and then press (select button).
When the process is complete, the printer prints two pages with
cleaning patterns. Discard or recycle this page.
Cleaning the printhead contacts
If lines or dots are still missing from printed text or graphics after you
have cleaned the printheads, the printhead contacts might be dirty.
CAUTION HP recommends that you clean the printhead contacts only after
you have cleaned the printheads. Printhead contacts contain
sensitive electronic components that can be damaged easily.
To clean the printhead contacts
1 Make sure the printer is turned on.
2 Lift the top cover, and then press (select button) on the
LCD control panel.
-Or-
• Press (select button) on the LCD control panel.
• Press (down arrow button) to highlight CONFIGURE DEVICE ,
and then press (select button).
• Press (down arrow button) to highlight PRINT QUALITY ,
and then press (select button).
• Press (down arrow button) to highlight REPLACE
PRINTHEADS , and then press (select button).
3 Lift the ink cartridge cover and printhead cover.
4 To open the latch, lift it from the rear (item 1 in the graphic) and
then pull it forward and down to release the hook from the metal
catch (item 2 in the graphic).