HP designjet l65500 Manuale Di Servizio

236

Troubleshooting

The small arrows point to the place where lines printed in forward and reverse direction meet. The 

registration should be checked at that point. The check should be done for the KC, lm and MY print-

heads (MY is not shown). The Bidirectional alignment can change slightly when media thickness var-

ies.

The color patches are printed with a halftone, low-ink area fill in one pass printmode.

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The small arrows point to the place where two different printhead dies meet. No appreciable light or 

dark line should be seen at that point. Manual Alignment resets such alignment to the factory 

defaults.

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The patches also provide a basic judgment about the printhead nozzle status. Horizontal bands 
signal weak or missing nozzles.

If there are many horizontal bands that signal weak or missing nozzles, the die-to-die 

registration might be a poor indicator. In that case, clean the printheads and reprint the 

Printhead Alignment Diagnostic Print for a better indication of the die-to-die registration.