HP designjet l65500 Manuale Di Servizio

184

Troubleshooting

3.

The printhead may be suffering from an internal failure, in which case it must be replaced.

When a printhead touches and damages the substrate, the most likely cause is excessive heat. Therefore, 

try decreasing the drying temperature.

You should not touch the printhead cleaner roll except when you need to replace it. Any interference with 

the roll may prevent the printer from keeping track of roll usage, in which case you may see spurious error 

messages, and a printing job may be cancelled unnecessarily.

Symptom: when plugging or unplugging a cartridge, in case the LED on the side of the cartridges do not 

react at all and the printer does not seem to see the change, here is the proposed troubleshooting steps:

1.

-  Perform the following diagnostic procedures, and if any of the procedures fail, following the recom-

mended troubleshooting procedure documented in the service manual, chapter 4.

•

4.1 ISS Electronics page 318

•

4.10 Ink Cartridge LEDs page 326

•

4.20 Check Ink Supplies page 339

•

4.3 Ink Supply Connector page 320

2.

If all the previous proccedures pass, check for a failure in the cable from from the ISS board to the 

Upper Engine PCI board, passing through the Main Interconnect. This line is passes through the fol-

lowing cables:

•

Cable linking J36 (ISS board) to J8 (Main Interconnect)

•

Cable linking J306 (Main interconnect board) to the Upper Engine PCI board (flat cable).

3.

Replace the components one at a time until you find which one is preventing the line from working. 

In this procedure we explain how to check the ink delivery system from the cartridge to the Printhead.

1.

First collect the service plot (page 418 of chapter 4). Need to have FW version > 14.x and IPS > or 

equal than 3.5. If not, upgrade first to the up to date version of FW and IPS. 

2.

Remove the front left cover, and the rear left cover.