Phaser 8550 DP inconsistant blurry prints

[LUKESK]

Hello, I've the same problem with a 8500 with any software, and suddently after a normal print are out some very strange outputs, with characters and images of the entire printed page instead compactly with adjacent points, oblique lines alternating with empty spaces . Immediately afterwards I did print from the "Print Troubleshooter" menu, just to get more clues, and those pages were printed well enough, just barely out of focus. Then he began to print more and more blurred through the entire page, as long as you do not stand out as characters and images, but the thing is progressive, since one in six / seven printing correctly, then resumed gradually more and more out of focus . Is the same if print in color or B/w and does not change even if I switch from rapid to advance quality. I note right on the technical manual Chapter 5-17 "Fuzzy Text", something similar, but here images or text hard to read are not on entire page, but on left or up or bottom, while my pages come out as completely washed out ... I tried to clean the Drum and I checked step by step, slowly turning the flywheel, but it seems perfect. Doing research online, I found some hypotheses, ranging from drum to replace, the print head, to the amplifier "amp wave board", and I've done more times "Clean Inks smears" and other test printings, but it prints 1 page more or less well and after more other are blurred more and more: have any suggestions?

Thank you and greetings
Luca Caratti

[andreasoc]

hi have the same problem with the printer.

I do not understand what I have to clean... You can give me the pages of this guide which component should I clean? http://www.inkcloners.com/Service-Manuals/Xerox-8400-85xx-Service-Manual.pdf

thank you very much! 

[JohnM-Xerox · Accepted solution]

Hello MarkGHC,

Thank you for participating in the Xerox Customer Support Community.  We're glad to hear that the issue with your printer has been resolved with the help of another community member!  To help others who may have the same or similar issue that you were experiencing, could you please click on the "Accept as Solution" button in the bottom right corner of the post?  That will make this thread visible to everyone in the community who is looking for a solution to a problem just like the one that you had.  Thank you very much, MarkGHC and please keep visiting the Xerox Customer Support Community!

John

[MarkGHC]

That seemed to fix the issue. Many thanks!

[dmaxwell]

The wires for the drum heater go through the cover and that can make it a bit hard to remove.  I think there are three wires, black, white and red.  It's kind of a pain but the cover will come off if you work it gently off.

David

[MarkGHC]

Thanks for the tip dmaxwell. Unfortunately I’m having trouble getting the cover off. I removed the fan and released the 5 clips holding the cover but it does not want to release. I don’t want to pull too hard because I don’t know what the resistance is from. It feels like I might be pulling on wires. My manual doesn’t go into any detail on the drum emitter…

[dmaxwell]

Sometimes, oil from drum gets on the drum emitter wheel causing it to not spin at the correct speed.  If you remove the drum fan, you'll be able to remove the cover on the emitter wheel and clean it.  There is no "home" position on the drum so if you want to remove the wheel, it makes it easer to clean.  I've found this to clear up most cases of dots of print being where they shouldn't be.

[MarkGHC]

It doesn’t seem to matter what the source of the print job is. The printer was printing “Blurry” from MS Office over a network connection. But since I have had it I have been testing prints from the Office Demo > Continuous print menu on the printer. This printer does not have a built in copier (if I understand the question right) The level of shift is consistent down the entire page. One page will look to have some dots shifted slightly and another page will look almost streaky because the dots are off by about half an inch. It seems to be a consistent shift per page. If it’s off a half inch, it’s off a half inch on the entire page, if it’s off just slightly it’s off just slightly the entire page.

[JohnM-Xerox]

Can you tell me about the type of jobs that you are printing when this happens?  Is the entire image blurry or only a portion of it?  What software application(s) does this happen with?  How are you submitting the print jobs?  Does this happen with copy jobs?

Sorry for all of the questions, but it will help define what the problem is.

[MarkGHC]

Hi John,

Yes I originally ran the “Clear ink smears” function 3 times even though the print doesn’t look smeared it looks as if dots are shifted. I have since ran it 3 more times as suggested. My ratio of bad to good prints has changed. However, this might just be a temporary coincidence, I don’t know. I am still getting poor quality prints… Blurry, Good, Good, then Blurry for the next 6 test prints… I forgot to mention that I have also swapped out Maint. Kit from my previous post. I could run the Clear smear 10 times if you think it would make a difference, but I get bad prints followed by good ones... which doesn't seem like a smear issue to me.