[CQ] duplex printing B5 on nashuatec dsm735

[feroo666]

When duplex printing is printed on the second side of the paper to the bottom of the page a little bit in the face, the first of which will affect the quality of the output

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When I print duplex printing is on the first face efficiently but when printing on the second side to be relayed Lines distance of 0.75 cm from the first face

[Iowatech]

Re: duplex printing B5 on nashuatec dsm735

If you could share a picture of the print defect that would be helpful.
If that's not possible, I'll take a guess for what it is worth, although my understanding of metric paper sizes is poor. So feel free to ignore what follows.
One of my favorite ways to initially troubleshoot duplex problems was to take the cover off the duplex unit and then watch the paper go through, and there's only four screws that hold that cover in place so it is pretty easy too. When the paper hangs up you will see where to check. That machine is pretty old, so I am guessing one of the rollers in the duplex area is not rotating correctly, and the bushings for that roller need to be cleaned and oiled.
If that doesn't work, I'd check the mylar guides in the exit area of the duplex unit and the lower side of the right hand door for damage.
Well, I hope that helps, but if not I'm sorry for wasting your time.