5 out of 6 of my Z3100 printheads are out of warranty.
All due to a date expiry rather than ink usage:
ink used / warranty spent
1 - Gloss enhancer-Gray 560 ml / 55%
2 - Blue-Green 120 ml / 15%
3 - Magenta-Yellow 260 ml / 25%
4 - Light magenta-Light cyan 140 ml / 15%
5 - Photo black-Light gray 620 ml / 65%
6 - Matte black-Red 210 ml / 20%
I figure from the above table that you can use about 1000ml per head before they are out of warranty.
But why the date expiration?
I called HP and they said that I must replace them (obviously), I asked why, he said dried ink could cause banding which I understand, if all the spare nozzles are used.
I am having some color issues at the moment, with profiling etc... do you think that these 'expired' heads could be the cause? I know HP will tell me to replace them, that's a given, but the HP guy said I may get color cast etc./?
Any thoughts? Thanks
It sounds clear above. The efficiency of the heads may point to the use or condition of the print heads. The date is more a warranty issue than use or possible use, but the only way HP can ascertain viability is to have you use up to date and in warranty heads. I know there are few problems when using expired heads or ink carts but to be in warranty ensures the perfect working order of the printer.
You only have two heads that are above 50% so they would be the ones I would suspect if any. I have seen problems with the GE/Grey and MK/Red more than the others too. You can still use out of warranty heads and inks but they will obviously not be under the tech support contract if used.
I have a bunch of very old and out of date heads and ink if you want to experiment so contact me by PM.