4-4
Utilities
HP Designjet Ultra Low End Printer Service Manual
Printhead Recovery
This utility helps maintain proper operation of all nozzles in the printheads.
This is only recommended if you are experiencing problems with print
quality such as banding.
Three levels of recovery are available: soft, medium and hard. As a first step, the
soft recovery should be used. If you still experience the same image problems,
then select medium. Hard recovery should only be used as a last resort.
Before recovering the printheads, first check the maximum recovery level
already performed on the printheads. If hard level (Recovery Level 3) has
already been performed, then do not try performing hard level again. The
Maximum Recovery Level can be seen on the Printer Information page in the
"Printhead History" section.
Perform the Printhead Recover as follows:
1 D
epending on the Recovery level, hold the power button down and then
pr
ess:
For level 1 (soft) - the cancel button twice.
For level 2 (medium) - the cancel button twice and the resume button
once.
For level 3 (hard) - the cancel button twice and the resume button
twice.
Some Light Magenta Printheads will show degradation after 150cc of
us
age. This results in certain shift to green. If both of these conditions, 150cc
and up and shift to green are apparent, then the following Printhead
Recovery has to be performed.
Warning, this Printhead Recovery is quite strong and should
onl
y
be executed when both of the above conditions occur.
Also, before performing the Light Magenta Printhead
Recovery, make sure that the Network, USB or Parallel cable
is disconnected from the Printer.
For Light Magenta Printhead degradation (standard recovery) - the cancel
button twice and the resume button 5 times.
A less aggressive recovery can be performed as well, currently it is not in
use:
For Light Magenta Printhead degradation (light recovery) - the cancel
button twice and the resume button 4 times.
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