HP designjet l65500 Manuale Di Servizio

 Troubleshooting

237

The plot contains a reference marked "Legend" that may guide the user when deciding if any of the 

printhead registrations is good or bad.

•

The good/bad criteria shown above corresponds to a plot with maximum IQ (usually printed on 

high quality media such as vinyl). Other substrates and end usages may accept significantly worse 

registrations while still produce an output that is most cases is acceptable.

•

Automatic printhead alignment may not produce optimal registration in all conditions. Media 

texturing, elasticity and behavior with respect to temperature may lead to some imperfections in 

printhead registration. In such case, user may choose to use Manual Printhead Alignment instead.

Color calibration enables your printer to produce consistent colors with a particular substrate type, even 

if printheads, ink cartridges and environmental conditions change. After color calibration, you can expect 

to get prints with the same colors from any two different printers situated in different geographical 

locations.

You should perform the print whenever:

•

Whenever a printhead is replaced

•

Whenever a new substrate type is introduced that has not yet been calibrated with the current set of 

printheads

•

Whenever you notice excessive color differences between prints. Such color differences can be 

caused by aging and wear of the printheads, changes in substrate characteristics between one roll 

and another, changing environmental conditions and so on.

Good Bad