HP designjet l65500 Manuale Di Servizio

 Troubleshooting

245

The Nozzle Check print test is designed to check if the Printhead nozzles print correctly. 

The Nozzle Check plot is printed in a special one-pass mode where only few nozzles are used at once 

with small media advances. Thus, completing the entire plot, can take around 15 minutes. The diagnostics 

test prints out every single nozzle of each Printhead without applying an error hiding or alignment 

algorithm.

1.

Load a substrate.

2.

Open the Service Menu  page 271.

3.

Navigate to Service Prints > Subsystem > Nozzle Check.

The plot is intended for visual inspection only.

The plot consists of three blocks. For each Printhead, there is a different block that can be identified by 

the colors of the printhead used inside. Each block is split horizontally into two areas that correspond to 

the two colors in the printhead. Vertically, the block is split in five sections that correspond to the 5 dies 

in the nozzle plate of the printhead. The figure below illustrates this idea.

Each single region is composed by a series of numbered rectangles. Each rectangle is related to a single 

nozzle in the printhead. If one or more of the nozzles are malfunctioning or mis-positioned, you will see 

that the rectangles are not filled. The corresponding color and the number printed inside can be read.