HP 640 series User Manual

CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
CARE AND
MAINTENANCE
Care and maintenance 47
Maintain the print cartridge
If the paper is jammed in the paper feed area
1. Remove the jammed paper as shown.
If the paper tears when it is being removed
check to ensure that no small pieces have
been left inside the machine.
2. Reload new paper with the print side facing
toward you.
3. Press Cancel when finished.
4. If this was a fax, reprint the fax. For more
information, see Reprinting faxes on
page 40.
Maintain the print cartridge
To maintain good printing quality, we recommend you occasionally maintain the print
cartridge and its associated parts:
Clean the print cartridge nozzles
If characters are not printing completely or white streaks appear in your text, you may
have clogged nozzles. Clean the print cartridge as described below:
1. Press Menu repeatedly until
TOOLS appears and press OK.
2. Scroll to
Clean Cartridge by pressing  and press OK.
3. Examine the printed test pattern.
• If print quality does not improve, reinstall the cartridge and repeat these steps.
• If the line is still broken, wipe the nozzles and contacts. For more information, see
Wipe the print nozzles and contacts on page 47.
Wipe the print nozzles and contacts
If cleaning the print cartridge nozzles as discussed above does not help and you are
certain the cartridge has plenty of ink, the problem may be caused by dried ink on the
print cartridge nozzles and contacts or the print cartridge carrier contacts. Follow these
two sets of instructions for manual cleaning.
Clean the nozzles
1. Press Access Cartridge.
2. Open the control panel and cartridge compartment cover and remove the cartridge.
See Replace the print cartridge on page 44.
3. Gently blot and wipe the contacts and nozzles dry.
• Use a clean cloth dampened with water to gently clean
the entire copper-colored area, including the nozzles and
contacts.
• To dissolve any dried ink, hold the damp cloth against the
nozzles for about three seconds.
CB782-90001_UG_EN.book Page 47 Friday, June 29, 2007 4:13 PM

HP 640 series Specifications

General

Brand	HP
Model	640 series
Category	Fax Machine
Language	English