HP designjet l65500 Manuale Di Servizio

 Troubleshooting

239

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If a significant number of printhead nozzles are blocked, you will see missing lines in this display, as 

shown below.

1.

In the same window, select any printheads that are showing missing lines, and press the Hard clean 

button.

2.

When the hard clean has finished, press the Print button again to see whether the printheads have 

improved.

3.

If you still see five or more missing lines in any one color, you are recommended to replace that 

printhead. With fewer missing lines, the printer can maintain good quality when printing with four 

or more passes.

If the above printout seems blurred or grainy, you may need to change the substrate-advance 

compensation.

You should print a service print whenever it can help you define or resolve an image quality problem.

The procedure for making each service print is the same.

1.

Load a substrate.

2.

Open the Service Menu  page 271.

3.

Navigate to Service Prints > Subsystem > Plot.

Description: The printer makes sure that a substrate is loaded and then prints the plot.
Procedure:
The printer asks you if a substrate is loaded.

1.

Press Enter if a substrate is loaded or Cancel if a substrate is not loaded.

The printer prints the plot.

2.

Press any key to finish the service print.

3.

Move the substrate advance far enough to read the plot.

4.

Find the interpretation instructions in the next section page 240.