Question about Xerox Phaser 8550DT Thermal Printer

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Prints stick to drum and cause exit jam

Prints with quality setting higher then standard stick to the drum and cause a jam on exit. My theory is that on the higher quality settings more ink is used and therefore more adhesion to the drum which causes the jam.

Let me summarize events leading up to this point:

1. Been using artisan compatible ink for 2 years without trouble.

2. Tried compatible maintenance kit. Sticking and jamming began. I inspected this kit and found it did not roll all the way around without resistance so I assumed the drum was not getting oiled uniformly and that this was the source of the trouble.

3. Tried new extended Xerox maintenance kit that rolls smoothly. Problem persists.

The release blade does actuate and manages to catch the leading edge of the print. But the print adhesion to the drum is so strong that the rest of the page gets pulled under the blade. Using the diagnostics I can see that the blade move up and down quickly and with full contact. I have used the diagnostics to observe that the drum and preheater are reaching operating temperature. I have removed and cleaned the drum temp sensor. It is in full contact with the drum. I have inspected the preheater and both the flag sensors are operational. The transfix roller rolls smoothly. The release blade is clean and undamaged. Using the diagnostics I have observed that the maintenance roller is contacting the drum and appears to be oiling the drum correctly. The maintenance kit blade is contacting the drum and appears to be working correctly. Prints on fast or standard that don't jam are observed to be mildly grainy leading me to believe that some ink is left on the drum. It is hard to see but it does appear that the grain missing on the print is present on the drum.

My theory right now is that the drum temp sensor is giving inaccurate readings which is either under or overheating the drum. I don't know how to test the sensor for its accuracy. So I'm leaning towards replacing it to see if the problem is fixed.

Any other ideas or tests I should try? Thanks!

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  • 2 more comments 
  • jonbird Nov 17, 2008

    The printer has fewer then 7000 prints so I don't think wear and tear on the drum is an issue. Other then the series of events(which might be coincidental) I don't have any reason to believe the compatible maintenance kit damaged the drum at this point. The maintenance kit applies a lubricant which is not chemically corrosive. The manufacturer says that isopropyl alcohol can be used to clean the metal drum which suggests it is chemically resistant and does not have a coating that might be damaged.

    The reason manufacturer's always recommend not to use compatibles is because they make obscene profits from selling supplies. I am not ruling out that compatible supplies could damage a printer. But my research online so far has not led to be to any evidence that compatible maintenance kits are immediately causing irreparable harm to the drum of Xerox solid in printers.


  • jonbird Nov 17, 2008

    There are no fault codes. There is a jam code C2X5 which is "Strip flag unexpected event during exit" / "clean and inspect the exit rollers". The exit rollers are appear to be functioning normally. And the paper path test passes.

    I should add that not all prints on higher quality than standard stick to the drum. It really depends on how much page coverage there is. A text print on highest quality wont typically jam. But a full page print like the cleaning page almost always sticks to the drum and jams.


  • jonbird Nov 18, 2008

    More experts please!

  • jonbird Nov 18, 2008

    I have inspected the entire paper path and there are no foreign objects. I have cleaned the rollers and the drum with alcohol as the service manual suggests.

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The Drum Maintenance Unit may be faulty. It's purpose is to apply a thin coat of silicon on the drum,so that the ink does not stick to it. You probably cannot read this. If you post your email I will send this page to you.

Prints stick to drum and cause exit jam - 977925a.jpg

Posted on Nov 18, 2008

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Where Exactly does the paper jam????

There are rollers (small rings with fie teeth that are used by the machine to guide the paper out. If one of these teeth's are bent it could possible account for the paper jam on exit. You should check the teeth to see if its bent/warped or warn. If you need to print something with the cover open use a paperclip or pen to push the safety switches into a closed position to allow the printer to print with the cover open. Look at exactly where the paper is hitting before it fist crimples. This is where the problem is and this is where we need to start working. Please reply asap...

Posted on Nov 18, 2008

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Using compitable generally does not damage the macnine parts as it is my personal experience and if u go through the manual of the machine completely it is written it that refilling the old 1 or using compitable will never damage the parts.as it will void the machine warranty if it is used and buying a orignal product will always give you a garantee of proper satisfaction in quantity and quality. but as per the paper jam in high density is caused due to  1)the sensor 2)the drum over used can also cause. 3)if the allignment (the distance)between the rollers get misalligned it gets jammed. why it gets jammed when on high density mostly? it gets jammed because the paper gets more pressure than regular mode printing in high density.and if the allignment is not proper it gets stuck in high density printouts. as to give the dark result on the paper more pressure is applied internally on the drums and rollers so it gets stuck when extra pressure is applied. and in normal mode printing the lever appling pressure does not go that down to apply force and the paper gets required space to come out. thanks.

Posted on Nov 18, 2008

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I think your guess is right. The ink should be causing this problem.
Did you try replacing the ink back to the manufacture recommended ?

If you still want to use the same, printer has to print slow. Which I think is impractical. Or there should be more air flow (at drum interface) so that it can dry soon.
or
print at low quality (low dpi)

Posted on Nov 18, 2008

  • Karthik P Nov 18, 2008

    Can you printing some document or page on which the upper part has a picture and the bottom part be blank.


    Let the upper part have a height of approx 3 times the diameter of the drum.


    Let us know if it gets jammed.

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If the printer ran for 2 years without recomended ink then, then i doubt the inks the problem, look inside to see if there are any foreign objects blocking the printer somewhere inside, get some compatable cleaning fluid and try to clean the whole print part of the machine.

hope this helps

best regards

Posted on Nov 18, 2008

  • Lee Hodgson
    Lee Hodgson Nov 18, 2008

    If the paper is jamming on exit then it could be an alignment problem as fixyy says, try using the printers own software to rectify the problem and alter the paper size adjustments

    regards


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Is there any err code on..

Posted on Nov 17, 2008

  • futureloginn
    futureloginn Nov 20, 2008

    That is a problem with the print head tilt or side to side movement.First remove the right and left covers. Then on look on the left side ( looking at the machine from the front). About mid way back toward the bottom of the frams you will see a stainless steel block, about 1 inch square. See if there is ink in it. Normally you will see some yellow ink buildup in that block. There is a spring on a bracket that you have to slip off to remove and clean the block. If excessivly filled witih ink you may have to use some channel lock pliers to remove it. Soak the block in some pretty warm to hot water to slften the ink and clean the block and shafe off thoroughly. Then clean the print head shaft and remove as much loose ink as possible.The second most likely problem is that the print head wiper blade has stuck to the print head. You then have to remove the ink loader, ( where you insert the ink sticks. Once that is removed you can access the print head/drum area. The blade is pink in color and if tacked to the print head, remove gently. Then run a couple of cleaning cycles and also the remove light stripes cycle. The blade will mostly stick if the machine it shut off improperly or there is a power failure. The clutch that drives the wipe may be bad, although far less likely.
    Those are the 2 most common problems that give that code. I would say those 2 resolve that problem more than 70 percent of the time. But that code means the print head is not moving side to side or front to ack properly.
    Hope this helps , it should.


  • futureloginn
    futureloginn Nov 20, 2008

    follow the above link to see your err code --
    http://www.solid-inks.co.uk/technical_su...

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That is why manufacturer always recommend not to use compatibles for the reason it might damage your printer (for this issue the drum), simply because the chemical content that compatibles use is not the exact match of what of the manufacturers.

But this is not always the case due to wear and tear also contributes to this type of issue.

Since you already covered what needs to be done, a drum replacement is the next logical step.

Posted on Nov 17, 2008

  • monk3ybidzness
    monk3ybidzness Nov 17, 2008

    Might as well add that hardware failure (on a rate of 1 out of 10) "do" happen even on low product usage.

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