HP Designjet T1100

HP Designjet T Series — Service Manual 1-15
Print quality troubleshooting
 In high quality modes, graininess in ALL colors can indicate problems
either with alignment or Paper Advance.
Corrective Action
In order to solve problems that result in banding, try the following:
1 C
heck that the appropriate print quality settings are being used (refer to the
User’s Guide for more information).
2 Chec
k that the loaded media is the same type as selected in the printer. You
can verify the media type selected through the Front Panel (Main Menu/
Paper menu/View loaded paper).
3 If
the customer is using low quality paper, try recommending better quality
paper (preferably HP paper). Printer performance can only be guaranteed
by using recommended papers.
4 P
erform the Paper Advance Calibration using the same type of paper that
will be used for the final print (Main Menu/Image Quality Maintenance/
Paper Advance Calibration/Calibrate Paper Advance).
If there is white point banding in o
nly one color band and the problem
cannot be fixed using the Printhead recoveries, in some cases using the force
a drop detection option can fix this issue. See
Force Drop Detection on page
1-24.
No Printing Defects Found in the Diagnostic Print
If all the test patterns from the Diagnostic Print are correct and you still
e
xperience Image Quality problems, you can use the following procedures
to resolve the problem.
 Reading the Advanced diagnostic Print Results
 Printhead Alignment
 Nozzle Health
 Force Drop Detection
The Advanced Diagnostic Prints
What are the Advanced Diagnostic Prints?
Advanced Diagnostic Plot.
These tests provide more information of the IQ
defects found in the Image Quality Service plot.
The Adva
nced Diagnostic Plot is divided into the following parts:
 Visual Media Advanced Diagnostic. Used to check advance reliability.
 Printhead Alignment Diagnostic. Used to check pen alignment reliability.
 Visual Nozzle health Diagnostic. Used to check nozzle health reliability.
 Force Drop Detection. Used to reset the nozzle health historic data base
and force new drop detection.