ARM-550, paper jams

[salmandol]

I have not worked on sharp machines for some years well, except for al-series. i am working on an arm-550 that jams letter size paper(portrait) and 11 x 17 only. it happens from any tray including by-pass, so i know it is not a tray problem. it stops about 2 or 3 mm away from the upper picks. also leteer landscape feeds fine . if anyone has any ideas it will be greatly appreciated.

[salmandol]

i was wondering if it could be a pressure problem

[blackcat4866]

What jam codes? =^..^=

[salmandol]

will have to check

[salmandol]

i returned to the machine today...funny thing i ran about 20 copies and did not get the problem. but tried it some minutes after and the problem was back...

the jam code is POD1_n

[tmaged]

You can run the machine in aging mode (sim 7)which turns the sensors off. More than likely on that machine either the sensor has gone bad since it sits over the top of the fuser, or the arm is about broken. Take off the small outer cover on the front over the fuser, then the long one with the duct in it (about 4 screws) on the left upper side. There is one screw then the fixing pin comes out the front. Uplug the harness & the whole delivery turnover unit will pull out easily. I've replaced all three sensors arms at one time or another & carry a whole set with me at all times.