Need Help L360 Printhead Issues

[Jayefkay531]

Hey All - I have an HP L360 that is killing me right now. Ink nozzles are flying out all over the place. I called HP and they replaced the 4 heads (CB, CB, MY, MY) that were underperforming as they were still in warranty. With the new heads, one YM head was replaced again as it had just about all 1056 nozzles blocked. They sent me another new one and the printer was printing beautifully for several days straight. However, after taking two days off, printhead 6, which was the one that was replaced twice, is now missing close to 600 nozzles. I've gone through 3 cleanings and let it soak in distilled water to bring it back...but I'm wondering if there's another issue at play here?

Has anybody seen anything like this?

 

[P Wagner]

Inspect and clean the rubber seals on the Maintenance Cartridge, or replace it if the cap seals are old, brittle or torn.

 

[Jayefkay531]

The maintenance Cartridge is still at 40% so I hadn't thought of that, but I'll give it a shot and see if it comes back to life. Thanks for the response!

 

[balstestrat]

I really doubt the caps unless you have had that same cleaning cartridge in there for years.

Look inside the drop detector and if there is ink buildup, knock it down.
I've seen cases where there is ink building up and it blocks the sensor -> some heads can report all nozzles missing or half of the die (600) etc. Sounds just like your issue.

 

[Jayefkay531]

I really doubt the caps unless you have had that same cleaning cartridge in there for years.

Look inside the drop detector and if there is ink buildup, knock it down.
I've seen cases where there is ink building up and it blocks the sensor -> some heads can report all nozzles missing or half of the die (600) etc. Sounds just like your issue.



View attachment 154719

Thanks for this. Quick question though - it's not just that it's reporting that half the nozzles are out....half the nozzles are actually not firing. The printhead test shows massive defects. Could this still cause this issue?

 

[balstestrat]

Thanks for this. Quick question though - it's not just that it's reporting that half the nozzles are out....half the nozzles are actually not firing. The printhead test shows massive defects. Could this still cause this issue?

Yes, this is the part that detects the nozzles. If there is blockage in the sensor and it doesn't see the nozzle firing it will eventually turn it off.

If there is a blockage there even the "bad" printheads come back alive almost instantly after few cleanings.

 

[Jayefkay531]

Yes, this is the part that detects the nozzles. If there is blockage in the sensor and it doesn't see the nozzle firing it will eventually turn it off.

If there is a blockage there even the "bad" printheads come back alive almost instantly after few cleanings.

Awesome - I'll give this a shot. Thank you!