HP designjet l65500 Manuale Di Servizio

 Troubleshooting

241

In general, the registration between colors should not show abrupt changes. A smooth variation along the 

scan axis is due to Media Expansion.

Abrupt changes signal serious problems with the scan axis encoder strip.

•

In the cyan band, the encoder strip causes‚ glitches‚ about 3 mm apart that correspond to the 

printhead arrays.

•

In the yellow and magenta band, the abrupt glitch measures 135 mm apart.

•

Generally, you should always find both of these glitches if there is a problem.

If you recognize both of these patterns in the same plot, even slightly, replace the 

encoder strip. There is absolutely no image quality tolerance for this problem  page 631.

135 mm

3 mm