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Print Quality
HP Designjet 4000/4020 Printer Series Service Manual
No Printing Defects Found in the Diagnostic Print
If all the test patterns from the Diagnostic Print are correct and you still
experience Image Quality problems, you can use the following procedures.
Print Banding Plot
This should be used when printing in fast print mode and there are banding
issues that cannot be solved through the standard troubleshooting
procedure. It is designed to highlight and identify three problems:
îš„ The advance calibration is not optimized.
îš„ The printhead alignment is not optimized.
îš„ Nozzles not firing in a printhead.
How to print the Print Banding Plot
1 In the Service Utilities submenu, scroll to "Diagnostic Print" and press Enter.
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