HP Designjet 2500.3500cp Printer series - Manual (Page 262)

Troubleshooting
Solving Ink System Problems
11-42
Cleaning Electrical Contacts
The printer prints by firing tiny drops of ink onto the media. This is controlled by
electrical signals that are sent from the printhead carriage to the printhead through
electrical contacts. During normal printing operations, it is possible for ink to get
spilt onto these electrical contacts. Ink can also be spilt onto them when printheads
are loaded into the carriage.
To clean the electrical contacts, you will need some cotton swabs, lint-free cloths,
soft tissues or napkins. You will also need some clean water, preferably distilled.
Avoid using dry cotton swabs, as lint from the cotton may leave debris or other
contaminants; avoid also using dry cloths, as they may scratch delicate surfaces.
Alternatively, you can use a suitable cleaning kit, for example, the HP C6247 Ink
Cleaner—follow the supplied instructions.
1 Prepare a clean cotton swab by dampening it with distilled water. Rotate the end of
the swab between your fingers to pack the cotton and to remove excess water.
If you are using a cloth or tissue, make it slightly damp, but not so wet that it drips
or disintegrates.
If you need to clean more than one ink system, use fresh swabs for each one, to
avoid cross-contamination.
Do not power off the printer.
CAUTION Never drip water into the printer.
2 To clean the electrical contacts on the printhead, remove it from its stall and,
holding it by the cap, turn it as shown below.
Do not
touch
here!
Nozzle plate
Clean here
Contact pads
Clean
here
C472368