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Phaser 7400 printing mixed color - edge to edge

Hi to all! Any one knows what's wrong with my Phaser 7400?. Fist problem we found on this printer error 929 failure in the waste toner motor, and it was the Waste Toner Auger assy defective, spiral was twisted and so we replace a new one. After that the printing result was this(photo) and wasting a lot of toner. We installed new engine control board, IP board, power supply, fuser and full 4 toner. Problem still the same Please help, Thanks in advance!

 

Xerox Phaser 7400 Badprint.jpg

 

 

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Re: Phaser 7400 printing mixed color - edge to edge

Where's the Xerox team???

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Community Manager
Community Manager

Re: Phaser 7400 printing mixed color - edge to edge

Hi Marcos,

Thank you for using the Support Forum. Please take a look at these solutions for colors too dark and see if any of these solutions will help correct your issue.  If this does not help please consider contacting your support centre for further assistance.

Thanks,
CherylO-Xerox
Community Manager

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Re: Phaser 7400 printing mixed color - edge to edge

@CherylO-Xerox these solution you mention can be apply when the printer is working properly. The photo shown here was the first test page when you fist turn on the printer and so no mater what you try to do with it or to print you will have the same result, we've done hard reset from the IP board and NvRam as well. We tried replacing IP Board, High voltage board, Engine board, imagine unit, transfer belt and fuser. We did called already the tech support from XEROX and done one 'n one troubleshooting but nothing resolve the problem, we also check(buzz) all the cables and connectors but still no luck. For every time you turn on the printer the toner drop'n to the transfer belt and going to the waste and so I did may only 10 test page and from the 100% new toner only magenta went all the waste and now it is empty. Magenta and black always bleeding or flooding the transfer belt and when it was finished or empty it will drop the cyan and the yellow. We also checked the ADC assembly and ADC auto test and the result same story... If you need the case reference from Xerox I have it.

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Community Manager
Community Manager

Re: Phaser 7400 printing mixed color - edge to edge

Hi Marcos,

If you are unable to get the machine to turn on properly and have done all those things that you mentioned the only thing I can suggest is that you have a Xerox technician look at the machine or if it is still under warranty possibly having the machine replaced.  You are past my area of knowledge on this one as I am not a technician.  If you are in the US you can call 1-800-821-2797 to request service.   

Thanks,
CherylO-Xerox
Community Manager

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Re: Phaser 7400 printing mixed color - edge to edge

@CherylO-Xerox I am the technician.. We are now buying a new one... But still keeping this defective machine and may be someone have a solution might help us and repair it again just post it here. Thanks to all!

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Re: Phaser 7400 printing mixed color - edge to edge

We found the problem!!! It's on the LED Assembly and it's a gear no. 28, part no. 807E17570. The gear was completely broken and not even noticeable. The function of these gears will rotate the shaft and will open the LED cover. But as you can see on the photo it looks like electrical problem, component problem or high voltage problem.. I attached the actual few photo's of it. Good luck guys!!

 

 

Missing.JPG

 

 

 

 

Good.JPG

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Re: Phaser 7400 printing mixed color - edge to edge

I am having the same problem but my gear is in place.  There does seem to be a small gap in the gear.  I get full edge to edge color coverage and my transfer unit has a swath of color acroos the entire width..

transferUnit_ColorSwath.JPG.jpeg

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Re: Phaser 7400 printing mixed color - edge to edge

Sorry for the upside down image.
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Re: Phaser 7400 printing mixed color - edge to edge

Were you able to replace that gear yourself or did you have a service tech. do it?

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