HP designjet l65500 Manuale Di Servizio

256

Troubleshooting

The following information is mainly just for information: current height position and PPS calibration 

shim values (represent the shims placed at the manufacturing side, valid when the printer S/N is 

higher than SG91xxxx). 

Expected value: the most important is the current status, has the printer put the scan beam at the 

expected position (homing position). 

For the height: it is there mainly in case of escalation, this information might help to better understand 

an issue.

For the PPS homing switch: should correspond with the actual position of the switch.

•

Check the 3 phases settings remotely: 

Possible values: 200, 208, 220, 380, 400, 415, undefined (if undefined, stopper system error 

preventing to boot). The values should be the closed lower values versus the real measured voltage 

values (between phase). Exception: in case 378V is measured, 380V has to be selected. 

•

Check if the calibration of the drive roller has been done, checking that not all the values are set to 

0.
When a calibration has been performed, the slope=0. There are cases where the Amplitude and 

Phase = 0, which the calibration of the drive roller has been done..

The following are acceptable values (any other values and the substrate advance could even fail to 

advance at all):

•

Slope should be > -0.0093 and > 0.0047 (else a status should have been reported when 

doing the drive roller calibration and calibration check).

•

Phase should be < 296. No constrain on the phase (else a status should have been reported 

when doing the drive roller calibration and calibration check).

•

Current status of some switches:. As the service plot is generated when the printer is in ready mode, 

the vacuum level should be between -20 to +20. In case value set to -245, there is a high probability 

that the air pressure sensor is not working.