HP designjet l65500 Manuales De Servicio

 Troubleshooting

199

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Check that the CAPs are in good shape (no broken Pins, part showing in the picture below). 

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When the checks and cleaning have been performed, close the right door, and follow the 

instructions on the small front panel. 

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Check functionality of the drop detectors: 

1.

Print the specific nozzle check (2.6.1 Nozzle Check), here is an example: 

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Immediately after, when the printer is back to ready, run the force drop detector, from service 

menu: ‘1.5.2 Force Drop Detection’. 

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And compare the number of nozzle out reported for each Printhead on the front panel versus 

the real number of nozzle outs from the plot printed. 

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In case of important differences: 

- In the Printhead is pretty old, this might happen (mainly when the ‘speed of the drop’ is 

reducing). If you replace the PH with a newer PH, this important difference should not hap-

pen anymore 

- In case of new Printheads: 

- Run the 1.5.3 Ghost Drop Detection  page 411.

- Run a hard cleaning of the PH and redo the ‘force drop detection’ after the end of the hard 

cleaning. 
- Perform the 1.5.2. drop detection calibration  page 410.

- Interpret the printer.log  page 262.

- Reset drop detection tables 

- Change of print mode

In case of requirement of support from HP, here is the information to provide, in order to speed 

up the response time: 

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In case of little differences, if most of the nozzles are working, you can reset the drop detection 

table. This can be done by performing the utility 1.5.x, reset nozzle table (available from FW 

GF-BOB_4.1.2.5)

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The files (.xml and .tar.gz) from the HPretrivertool. 

Test the functionality of the drive roller. Open the pinch wheels, with no media loaded, place your hand 

on the drive roller (black rubber part) and try to rotate the drive roller (in both rotation). Except for a small 

backlash (a few millimeters), it should not be possible to turn the drive roller.