Question about Xerox Phaser 7400DN Laser Printer

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Print Quality problem Xerox 7400DN

I have used this machine for about 2 years with very good results. I have used the same paper stock (approx 250gsm, 12x18), again with good results.

Just this week, I have begun getting a "smearing" on approximately the front 2 inches of the print area (front meaning closest to the operator panel). I am printing only black toner. It looks like loose toner, either on a roller OR not adhered properly to the paper before entering the fuser. Therefore, sometimes there is "extra toner" creating print marks that are unintended, or sometimes the toner that was to make up an image on the media will simply be missing or dragged/scraped/shifted off the intended area.

I have tried running the Remove Smears, but it will only work with 11" wide media (max) when feeding long edge first, and there's about 1" margin, so it doesn't quite reach the affected area. I have replaced the fuser with an older fuser, same results. I have replaced the imaging unit with a new imaging unit, same results. I have replaced the toner with new toner cartridge, same results. I have swapped the transfer belt with an older transfer belt, same results!

It is inconsistent, I can sometimes print 2-3 pages without problem, then I'll get the progelm showing up on multiple pages. When the problem does show up, it does not streak through the entire page - it is in isolated areas.

I'd be most appreciative of any help in this direction!

Thanks in advance!

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Opening a cover during printing will cause a paper jam. If you do this several times and carefully clear th paper you may be able to isolate the origen of the smudging.

Posted on Jul 18, 2008

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