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HP L26500 Repeated light ink printhead issues!

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Myles Brewer

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Post Fri Mar 15, 2019 7:16 pm

HP L26500 Repeated light ink printhead issues!

Hi All,
I'm wondering if anyone out there may be able to shed some light on an issue I have repeatedly had since I got my printer some two & a half years or so back.
Every couple of months one of either the light cyan or light magenta printheads suddenly, & totally stops working, usually part way through a print. No amount of head cleans have any effect either via the printer or manually.

HP have been very decent so far & replaced them all as faulty, but I'm sure they shouldn't just stop working like that?? They are often pretty new, in fact the latest one has just done it with only 149ml through it!!

It seems to be far more common with the light cyan in slots 1 & 2 than the light magenta in 5 & 6.
Always gives Error Code 98:03 which is just printhead malfunction.
As soon as the head is replaced print quality is perfect again.

I would possibly say it usually happens after a fairly long print session or maybe after solid colour printing but couldn't be 100% sure about that.

I pretty much always print using colour bands down one side to ensure all heads are firing constantly so they are all getting regular use.

I'd really be interested to know if anyone else has had similar problems.
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Post Fri Mar 15, 2019 8:24 pm

Re: HP L26500 Repeated light ink printhead issues!

I’m having the same issue with my 26500! I’m putting it down to a heat issue! I have to keep swapping between 2 lc/c printheads. Always on slot 2!
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Post Fri Mar 15, 2019 8:26 pm

Re: HP L26500 Repeated light ink printhead issues!

I have read somewhere the 26500 runs at a higher heat than the newer models and it helps to remove some covers around the heads and use a computer fan to keep them cooler! I’m going to try this mod soon
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Myles Brewer

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Post Fri Mar 15, 2019 8:38 pm

Re: HP L26500 Repeated light ink printhead issues!

Mark Piddington wrote:I have read somewhere the 26500 runs at a higher heat than the newer models and it helps to remove some covers around the heads and use a computer fan to keep them cooler! I’m going to try this mod soon

Hi Mark, But the heat wouldn't account for why it's ALWAYS only the light ink that has the problem!
Not sure if yours is the same but with mine the light ink 100% disappears on the printhead test plot! One minute it's 100% perfect firing on all nozzles & then 100% stops, like a total blockage. Fit a new head & it's perfect again.

I did wonder originally when it had done it a couple of times if it could be old ink, but quickly ruled that out.

I would think if heat was the issue it would be affecting all heads & all colours not just the light inks & even then I would think it would be a gradual degrading of print quality & not an instant total failure.
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Post Fri Mar 15, 2019 9:12 pm

Re: HP L26500 Repeated light ink printhead issues!

Mine is exactly the same issue! It was printing fine until I did a run of 7 drops of wallpaper and none of them matched in colour. After adding colour bars I discovered it kept losing head 2 halfway through a run. Normally after it’s been printing for a while. I tried a new head and it still had the issue after printing for a while, dropped the old printhead in and away it went again! It’s frustrating as I can’t guarantee it will print a long run without the head having an error! I tried a firmware update etc etc and the only thing I can put it down to is the heat! I’m considering changing the printer just because I need it to be reliable
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Luke Culpin

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Post Fri Mar 15, 2019 9:15 pm

Re: HP L26500 Repeated light ink printhead issues!

I used to have the exact same issue with the cyan! Was some time ago now, I can’t remember if we did a firmware update or not now. Other than firmware, I know we never actually did anything else to combat the problem, it just eventually went away!
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Myles Brewer

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Post Sat Mar 16, 2019 2:00 am

Re: HP L26500 Repeated light ink printhead issues!

Thanks lads, at least I know now it's not just me or my printer!! I'm wondering if HP knows more about it than they are letting on with the fact they seem to be happily replacing them?? It's just very frustrating as you say Mark it's hard to rely on it printing a run consistently.
I must admit I haven't re-tried them after they fail, so that's interesting to know that they "reset" themselves after being removed for a while! I wonder if there might be some sort of airlock created in them that is gradually released over time??? Anyone technical out there that may be able to add to this?
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Peter Munday

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Post Sun Mar 17, 2019 3:39 pm

Re: HP L26500 Repeated light ink printhead issues!

From what I remember there was a problem with slot 1&2 that kept on asking for the printheads to be replaced but this was resolved with a firmware update, it worked for me.

Peter
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Kevin Busby

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Post Mon Mar 18, 2019 12:43 pm

Re: HP L26500 Repeated light ink printhead issues!

Hi Guys

This was discussed in depth some months back or maybe a year or two lol, I had exactly the same problem with heads going out faulty all the time from the 5 and 6 slots.

Its quite simply down to head strikes, when something jams the carriage is the first thing to hit the media and the heads take the punishment not always straight away does it show, Ive had brand new heads go out with only a little ink used. This is why the new 3 series latex have head protectors so if it jams the media hits the plastic bumper rather than the head carriage.

Luckily mine was under warranty and Art Systems replaced every part of the carriage in the end but I sold it soon after so could not be sure if this resolved it or not.
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Myles Brewer

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Post Mon Mar 18, 2019 1:53 pm

Re: HP L26500 Repeated light ink printhead issues!

Peter Munday wrote:From what I remember there was a problem with slot 1&2 that kept on asking for the printheads to be replaced but this was resolved with a firmware update, it worked for me.

Peter
Thanks Peter, but as far as I'm aware I think I have the latest firmware update & not sure if hp are likely to be issuing further updates due to the age of the printer now?
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Myles Brewer

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Post Mon Mar 18, 2019 2:54 pm

Re: HP L26500 Repeated light ink printhead issues!

Kevin Busby wrote:Hi Guys

This was discussed in depth some months back or maybe a year or two lol, I had exactly the same problem with heads going out faulty all the time from the 5 and 6 slots.

Its quite simply down to head strikes, when something jams the carriage is the first thing to hit the media and the heads take the punishment not always straight away does it show, Ive had brand new heads go out with only a little ink used. This is why the new 3 series latex have head protectors so if it jams the media hits the plastic bumper rather than the head carriage.

Luckily mine was under warranty and Art Systems replaced every part of the carriage in the end but I sold it soon after so could not be sure if this resolved it or not.
Hi Kevin, I understand what you're getting at & yes the head carriage would be stopped by a media jam & I have had 3 or 4 since I had the printer but I've definitely gad more heads go faulty then head crashes, I.e. Heads that have never seen physical damage but still go faulty.
Also how could that account for the fault being 100% exclusively on the light ink side of the heads & it being a 100% instant & complete failure of all nozzles in that light ink side??
You said your issues were mainly in slot 5 & 6 which are the furthest from any head strike, unless the head strike is on the back stroke which I've never encountered yet.

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