Horizontal lines in prints C75

[positiveg]

Please take a look at prints made and also drum test
We had the tech Ce in do some ori t's etc. We ran about 15000.prints of a form but was mainly black ink, last two days. And because was forms was all letters no graphics but a all logo at the top. We experienced nothing like this. Yesterday now we noticed this in the prints
They seem very consistent.
Don't want to believe it may be the lasers because then why on all the pro t's and about se level of consistency between each line et

Please assist thanks

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[positiveg]

Re: Horizontal lines in prints C75

Ok the issue seemed to have been bad black toner.
I peeped at the black developer it was good.
Then remembers put in a black toner that got out of a sale from a seller.bad choice they really messed so now I'm getting better prints but I need to know why this is happening

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[positiveg]

Re: Horizontal lines in prints C75

The lines are back. I'm not sure if the faulty black toner has completely run through the system. Which I thought it had or what but take a look at the prints the lines

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[Detonation]

Re: Horizontal lines in prints C75

What's the repeating distance of these bands?

[positiveg]

Re: Horizontal lines in prints C75

What's the repeating distance of these bands?

approx 1 cm

[Eremite]

Re: Horizontal lines in prints C75

Chek the gear in second transfer roll.
When the machine is printing, do you hear abnormal noise?

[positiveg]

Re: Horizontal lines in prints C75

Well I changed the developing unit in the black. Just say got a few good prints then back to normal follows by a grinding sound like it's coming from the back of the machine. Like gears. The 2nd BTE just messy. But I think that's from the magenta developing unit cover plastic strip being burst off so we installing a new one tomorrow. But that grinding sound happened before we change the waste toner unit ans now it's back I don't know this printer is causing more harm than good right now

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[Milo Wilson]

Re: Horizontal lines in prints C75

Rear waste auger is bound up. Backing up all the developers.

[positiveg]

Re: Horizontal lines in prints C75

Rear waste auger is bound up. Backing up all the developers.

Strange I bough the entire unit for HST. And some other parts like leveler for hat area.
This thing giving more issues.
But would it cause the lines in the prints or just the lines?

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[positiveg]

Re: Horizontal lines in prints C75

Ok I pulled the waste toner cartridge and like you could tell it was backed up. So I emptied it. The noise is gone.
But the prints well the lines are more widely spaced a little over an inch, apart.
I'm so lost right now. As what we though was giving the issue a bad black toner now we jus not getting the correct colours one an and the lines

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[Detonation]

Re: Horizontal lines in prints C75

It's weird that the black looks just fine on the color prints. Makes it seems like it's only a problem with high coverage?

Strange I bough the entire unit for HST. And some other parts like leveler for hat area.

I'm not sure what you mean by this. After changing the waste toner box, did you you check and empty the entire waste toner auger system?

[positiveg]

Re: Horizontal lines in prints C75

I've printed the test pattern and this is how it comes out and how the 2nd BTR looks

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[Detonation]

Re: Horizontal lines in prints C75

Looks like a transfer problem to me... have you tried replacing the 2nd BTR?


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[positiveg]

Re: Horizontal lines in prints C75

Thanks all. yeah I cleaned out the 2nd BTR unit. I think after the issue of waste toner and dev spilling back into the unit might have led to it being extremely messy. I wasn't ale to strip it down fully ( the tech will do that tomorrow but I was able to empty it, blow it out and the print quality improved. I ran several test and was very impressed.
i think though the lens especially the magenta one needs cleaning badly because the magenta unit cover plastic got torn off so it was running like that for a while and spilling all over . So I'm seeing like fades in the magenta red etc print.
Will provide pics and more info tomorrow
but thanks all for the help so far. I really appreciate it.

[positiveg]

Re: Horizontal lines in prints C75

It's weird that the black looks just fine on the color prints. Makes it seems like it's only a problem with high coverage?



I'm not sure what you mean by this. After changing the waste toner box, did you you check and empty the entire waste toner auger system?[/COLOR]

Yes what I realise in the waste toner box (was causing the noise), seems like the toner was built up at the entrance into the waste toner box because when i opened the door and began sliding it out like it just blew out and from then no more noise but the BTR seems like was the issue getting all prints good but magenta so will check the lens as they might be dirty.
Wished if the lens were easy to clean like those in Konika etc lol