HP 4000 User Manual

6-18
Print Quality
HP Designjet 4000/4020 Printer Series Service Manual
If you see "Dark Lines"
If you see "Both White and Dark Lines"
DARK LINES
Do you see dark lines
all along
the customer plot?
yes / no
yes
no
M edia Advance actions:
- Select the correct Print Quality setting (see the table on page 6-3).
- W e strongly recom mend using HP m edia.
- If the problem persists, Heavyweight Coated paper should be used.
- If the problem persists, perform a Paper Advance Calibration.
Note 1: How long have you had m edia loaded? There is a specific problem
when printing with a brand new unit using Heavyweight Coated paper. It is
normal to see dark lines for the first few m eters of paper. After printing for a
while, the paper advance should be stabilized and optimal print IQ should be
achieved without any further actions.
Note 2: W ere you previously printing using Glossy paper and now you have
started printing using Bond paper? The first few m eters of the plot being printed
on Bond paper m ay have dark lines if the paper previously used was glossy
After a few plots this problem will disappear without any further actions.
Refer to Flowchart BO TH
(Dark and W hite Lines)
A
re you seeing dark lines in some areas and
white lines in others? Or are you seeing either
dark or white lines but not
all along
the plot?
BOTH (DARK and
WHITE LINES)
yes / no
yes
no
A
re you seeing white lines but only
in some areas of the plot (probably
containing the same based color?)
yes / no
yes
no
Refer to Flowchart
WHITE LINES
A
re you printing a high ink density plot? Or are
you printing a plot that contains
both
high ink
density areas and low ink density areas?
yes / no
yes
no
Media Expansion actions:
- Select the correct Print Quality setting (see the table on page 6-3).
- We strongly recommend using HP media.
- If the problem persists, Heavyweight Coated paper should be used.
A
re you seeing a frequential banding composed by a darker
zone and a lighter zone? See image 4 on page 6-16.
yes / no
yes
no
This problem mainly occurs after inserting new Printheads (specially
cyan), or when loading Heavyweight Coated paper for the first few
meters.
Dark Light Zone Banding actions:
- Select the correct Print Quality setting (see the table on page 6-3).
- Perform a Printhead Recovery if there is a significant amount of
nozzles out in Part 3 of the Image Quality Diagnostic Print.
- Perform a Printhead Alignment.
- If the problem persists, perform a Paper Advance Calibration.
- If the problem persists, replace the Printhead that is showing
misdirected nozzles.
Do you see
banding? What
type?

HP 4000 Specifications

General

Brand	HP
Model	4000
Category	Printer
Language	English