HP designjet l65500 Manuale Di Servizio

 Troubleshooting

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- When the magenta is first Vs black or Cyan (through media advance axis), the advance has 

to be decreased (and click on Apply). 

- When the magenta is behind/after Vs black or Cyan (through media advance axis), the 

advance has to be increased (and click on Apply). This is fully documented in the Mainte-

nance and Troubleshooting Guide, in the sub-chapter 'Substrate-advance test print'.

•

If there is mis-alignment of the magenta through the scan axis (axis followed by the carriage when 

moving), compared to the black/Cyan towards the edge of the substrate, (no mis-registration in the 

middle of the substrate, or the Printhead alignment has to be redone), it is possible to fine-tune the 

mis-registration. Refer to the Maintenance and Troubleshooting guide, chapter 3, 'Dynamic color 

registration on the fly' (for the L65500, the documentation is available on the www.hp.com, service 

& support -> L65500 and then click on manuals: document is called 'dynamic color registration 

user's guide'.

Automatic alignment is a fully automated procedure that ensures optimal print quality in most cases. The 

printer prints some patterns and scans them with the built-in line sensor. This is the recommended method 

for any smooth, high-quality substrates (including vinyl, banners or backlit). If the printheads have many 

defective nozzles, automatic alignment may not give good results. The procedure takes about 9 minutes 

and consumes 9 inches of substrate.

1.

From the Internal Print Server, select Printer > Printhead alignment > Automatic Align-

ment.

1.

The automatic printhead alignment prints, scans, and calibrates automatically.

Manual alignment provides reasonable print quality when automatic alignment is not possible, typically 

because a highly-textured or non-white substrate is loaded (mesh, perforated, some fabrics, transparent, 

colored). 

1.

From the Internal Print Server, select Printer > Printhead alignment > Manual Alignment.

The printer prints 8 series of patterns, and you must choose the best result from each of the series (for 

example, number 10 in the picture below). This process takes about 10 minutes and consumes 9 inches 

of substrate.

Automatic printhead alignment may fail occasionally. In some cases, you may see the Front Panel error 

message "Automatic Printhead Alignment is cancelled because of scanning errors". In other cases, there 

is no error message but the print quality is not satisfactory. In these cases: