HP OfficeJet Pro 7740 - Manual (Page 152)

To clean the rollers or separator pad
WARNING! Before cleaning the printer, turn the printer off by pressing (the Power button) and unplug
the power cord from the electrical socket.
1. Remove all originals from the document feeder tray.
2. Lift the document feeder cover.
This provides easy access to the rollers (1) and separator pad (2).
1 Rollers
2 Separator pad
3. Lightly dampen a clean lint-free cloth with distilled water, then squeeze any excess liquid from the cloth.
4. Use the damp cloth to wipe any residue off the rollers or separator pad.
NOTE: If the residue does not come off using distilled water, try using isopropyl (rubbing) alcohol.
5. Close the cover of the document feeder.
Maintain the printhead and cartridges
If you are experiencing problems with printing, you might have a problem with the printhead. You should
perform the procedures in the following sections only when directed to do so for resolving print quality
issues.
Performing the aligning and cleaning procedures unnecessarily can waste ink and shorten the life of the
cartridges.
● Clean the printhead if your printed output is streaked or has any incorrect or missing colors.
There are three stages of cleaning. Each stage lasts about two minutes, uses one sheet of paper, and
uses an increasing amount of ink. After each stage, review the quality of the printed page. You should
only initiate the next phase of cleaning if the print quality is poor.
ENWW Maintain the printer 139