User's Manual

Troubleshooting
1-54 HP Designjet T Series — Service Manual
4 Clean the electrical connections on the backside of the printhead with a lint
free cloth. You can carefully use a mild rubbing alcohol if moisture is needed
to remove residue. Do not use water. You can use the Flex Contacts Cleaning
Tool.
This is a delicate process and may damage the printhead. Do not touch the
nozzles on the bott
om side of the printhead, especially not with any alcohol.
5 Reinsert the printhead.
6 Check the front panel display message. If the problem remains, try a new
printhead
.
Maintaining and Cleaning the Printheads
Clean the printheads
As long as the printer is kept turned on, an automatic cleaning is performed
perio
dically. This ensures there is fresh ink in the nozzles and prevents
nozzle clogs, which ensures color accuracy.
If you have not already done so, please refer to Horizontal lines across the
image (
banding) and The Image Diagnostics Print before proceeding.
To clean the printheads, press the Menu key to return to the main menu and
sele
ct the Image Quality Maintenance menu icon, then Clean printheads. If
you have gone through the Image Quality Diagnostic print process, you
know which colors are failing. Select to the pair of printheads which contain
the failing colors. If you are not sure which colors to clean, you can also
select to clean all printheads.
Cleaning all printheads takes about nine minutes. Cleaning a single pair of
pr
intheads tak
es about six minutes. Cleaning all printheads uses more ink
than cleaning a single pair.