HP Latex 3xx Series - printing GREEN - Plot Test all OK - inks all OK - Any ideas ? please

[J4cko]

Hi Guys,
Hope you can help please.
Was printing some light beige, neutral coloured patterns over the weekend.
usually, a nice warm, beige/brown colour. Nice neutral tones.
Now..... the prints look green toned.

All heads are ok, the plot test is fine, no breaks in the lines, all fields populated in the grids.
All inks ok, 1/2 full cartridges. Maintenance tank only used 30%

Ran multiple head cleans, forced pure Magenta, and pure Lt Magenta through, 1m x 1.5m panels of solid magenta and light magenta.

but these prints, which we print regular, are very green

Any suggestion on what to check ? regarding heads ? ink etc ?
As the plot test looks fine

Really appreciate any advice and words of wisdom
Thanks in advance
Much appreciated

Jack

 

[balstestrat]

How much usage on the heads?
Replace LM-LC printhead.

 

[J4cko]

Hi Balstestrat, thanks for coming back to me on this.
maybe 2,500ml

We usually change them around 4000, for the last couple of years,
but historically, in the past, we used to run them till they failed !

it is often the LM-LC that is the culprit

Any suggestion if it is not this !?

Thanks again

 

[balstestrat]

Yes. Start with LM-LC and then continue other troubleshooting.

 

[cornholio]

If it's not LcLm, overaged ink or ink in the slot for too long without agitation..

 

[J4cko]

Thanks guys, we cleaned the heads a couple of times, ran a calibration update, replaced the LM/LC head and all seems good now. Thanks for the advice, much appreciate