sharp ar-m550 lines and shading

[Kirkc]

I have a ar-m550 that is having a strange problem... it is both shading and leaving lines on copies. The lines are the wrong way to be a corona problem. IF i am running 8 1/2" x 11" in portrate mode the lines go from front frame side to rear frame side(top to bottom), 3 of them spaced accross the page. and a overall shading of the page. I have replaced the corona, and the transfer belt on the side door, also cleaned all ground connections for fuser, drum,and transfer belt. it seems like a ground issue becouse the first line is placed on paper just as the lead edge of paper enters the fuser. any and all suggestions will be appreciated, thanks

[blackcat4866]

Are you sure that the lines are caused by the engine? Try rotating the original. Maybe the scanner is making your lines, and the engine is just accurately reproducing them. =^..^=

[bilyahn]

Are you using the document feeder or off of the glass? Depending on which one there is an old tech bulletin regarding this occurrence. I'm sorry I don't have it but there should be a couple of old threads that deal with this. If I'm understanding your problem correctly.

Good luck.

Bil

[Kirkc]

the problem is on all copies, from the glass, doc feeder, and the internal prints(22-6) so i know it isnt scanner related if it is on the 22-6

[bilyahn]

That would of been nice to know from the beginning!!!

[faxman28]

survey says ; LASER

[Kirkc]

here is a copy of what its doing, the lines are hard to see on the image but they are going vertical and the paper is moving through the machine horizantily
rfs=rear frame side
ffs=front frame side

[blackcat4866]

survey says ; LASER

Ditto that. Are there any laser codes in the event log? =^..^=

[Kirkc]

ok I have tried several things now with no success, I have replaced (in order) drum blade, cleaned all ground connections to drum cartridge, dv, fuser, transfer roller, then replaced corona, transfer roller, laser unit, entire drum cartridge, dv...all from a known working unit. I am now at a complete loss any suggestions will be greatly appreciated.