User's Manual

HP Designjet T Series — Service Manual 1-11
Print quality troubleshooting
Alignment Diagnostic, Nozzle Health, Force Drop Detection or Print Banding
Plot, and press the Enter key to start printing.
4 Make sure media is loaded, the Media Lever is lowered and that the Ink
System is correctly installed. Press the OK key to print the Diagnostic Print or
press Back/Cancel to exit without printing the Diagnostic Print.
5 The selected Diagnostic Print will now be printed.
Reading the Diagnostic Print Results
Diagnostic Part 1: Printhead Reliability
The Nozzle Print Test test is designed to check if the Printhead nozzles print
correc
tly.
The nozzles check (top of the plot) is printed in a one-pass full swath mode.
The di
agnostics test prints out every single nozzle of each Printhead without
applying an error hiding or alignment algorithm.
For each Printhead, you can see both the adjacent and the consecutive
nozzl
es.
If any nozzles are not printing correctly they will be shown on the right of
each Printhead Nozzle test. There is a series of numbered stepped diagonal
lines. If one or more of the nozzles are clogged, malfunctioning or mis-
positioned, you will see that the stepped lines are broken or misdirected in
one or more places.