Question about Xerox Phaser 8400 Laser Printer

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I have a Xerox Phaser 8400 with image problems. After power up it prints a Startup Page - That page is black text which faded and slightly distorted in some areas and in areas that are in Color only yellow is evident. I have cyan and magenta color cubes in place. On the cleaning page - yellow and black are the only 2 colors that seem to be evident - a slight stripe of faded maroon/red and even less of a faint green which my guess is the cyan. On the light stripe test black is evident but some missing stripes - some faded and some distorted. The yellow is the best of the 4 colors with very few missing some a faded black and very few distorted. The Magenta the lines are mostly missing some distorted and some a faded mix of black. The Cyan almost all missing with a few distorted blackish lines with some lines that are really more like a faded light green. When I check the waste bin there is excess wax equally for each color. Any ideas?

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What you are describing is a bad print head. You can try running the eliminate light stripes several times, and jet substitution, but most likely the print head will have to be replaced to remedy your problem.
You can try googling. Phaser printer print heads or phaser printheads.
There seems to be a secondary market appearing for those print heads. I can tell you from Xerox, if you have no maintenance agreement, they cost $750 per print head.
Honestly, having worked on about every type of color printer known to man, the new solid ink phaser printers, produce a dry ink image of 2400 x 2400 dpi with ink particles that align end to end. The resolution of those printers are remarkable and can be purchased for less than the price of one of those new print heads.
Now for reliable, albeit somewhat not as sharp a color image, but still exceptional, you really can not beat an HP.
The ink stick technology really no longer has the color vividness advantage it initially had. The inks that align end to end, have ended that advantage and are sure a lot cheaper to operate per page.

Posted on Feb 28, 2009

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From the printer, print the Troubleshooting Print Quality Pages.
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1 Answer

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http://office.support.xerox.com/SRVS/CGI-BIN/WEBCGI.cgi/,/?St=842,E=0000000000019251353,K=6024,Sxi=13,Case=obj(19377)

Click on Knowledge base from this site , then in the search box enter poor black quality. Look under black is faded or missing

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Black is Faded or Missing Step 1 Clean the Laser Windows and Remove Excess Toner From the Imaging Unit Step 2 Check or Replace the Imaging Unit Gear Retaining Pin Step 3 Replace the Imaging Unit (installation instructions) ic-film.gif
See if this link works. Xerox is infameous for these not working.
http://office.support.xerox.com/SRVS/CGI-BIN/WEBCGI.cgi/,/?St=842,E=0000000000019251353,K=6024,Sxi=13,Case=obj(19377)

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