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Jason JohanknechtFlag for United States of America

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B400 paper doesn't pull back correctly for duplex printing.

Xerox B400 laser printer that every time it prints duplex the first page comes out the top and as it starts to pull it back in it turns sideways immediately and almost none of the paper goes in.  Then it believes paper jam in back of printer, but I only have to open and close the back to clear the error.  I cannot find replacement rollers for that top of printer.  They are not rubber rollers, and I cannot see the top rollers.  

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Patrick Barnhardt
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Not xerox trained specifically, but this could actually be two different things, the first with a sensor since it is triggering the jam in a different spot - the sensor expects the page to reach it by a certain time based on size and weight, and it isn't - thus it must be jammed so it triggers the alert.


Definitely sounds like the rollers are losing the page then, especially if you're seeing basically that happen.  Have you contacted a Xerox tech yet?  There could be a kit or something that is not publicly listed.  I know some Ricoh parts come as assemblies only for instance.


This could be what you need, an exit assembly - but unlike the feed rollers I don't see where Xerox themselves sell it.  So it may not be designed to be user- maintained https://www.gmsupplies.com/products/Xerox-1/versalink/xerox-versalink-b400/delivery--exit-unit-parts/ it seems based on the naming that there may be a left and a right part separately.

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The pinch roller assembly is where the paper doesn't feed back in correctly.  There must be a roller that drives the paper back in though.  These rollers have no gears driving them from what I can tell.
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Patrick Barnhardt
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Looks like the exit chute assembly might be my answer.  Probably get the pinch rollers to be safe too.  I will investigate more with the physical printer.
The parts list was extremely helpful in getting the parts and fixing the printer.