0113 on ir105--paper dives at sep roller

[pspahr]

Howdy all, this one is kicking my butt:

Tray 2, left feed station, will feed the first sheet every time but the second sheet will try to dive under the seperation roller every time. Tweaking the seperation assembly left and right occassionally will cause the jamming to cease or increase but without any rhyme or reason. We've replaced the entire feed unit with an OEM unit from Canon and that particular unit would not even pull paper. Onsite is another 105 that we put that new unit into and it ran flawlessly. Putting the other feed station into the problem 105 produces the same failure as the new unit. Placing the old feed station in causes it to resume where it left off, feeds top sheet and then tries driving under the sep roller. I had it running real well for about 10k by lightly twisting the sep unit to toward tray 2 (to the left) but even that has ceased to work. Any ideas?

[davidj7]

did you interchange the seperation carona assembly with the other machine?

[pspahr]

let me clarify! This is all within the left feed station, no failure at T/S corona unit. The paper is diving into the seperation roller. I've found that pushing up on the bottom side of the sep unit seems to have made it more reliable, but not completely.

[Oze]

Have you looked at the LD paper feed clutch?
Have you checked Techbase for the jam code?
There is a High Priority alert for this very jam code on Techbase...I'm printing it out now to save to .pdf for emailing...
Leave me your email in PM and I'll mail the .pdf to you.

[Canuck]

Is the white plastic block on the tray itself ok.....this pushes the sep roll up into the feed roll. You say you have replaced whole pick up ass'y...obviously not the problem. These machines have prism/transmitter/receiver pick up sensors...initialize them in service mode to be sure. Did you run with right deck out to watch? Is sep roll driving back while feeding? How about paper tray....level? The white block on the top corner has to be mounted when installing the machine....for some reason Canon doesn't mount it in manufacturing...is it missing?

[pspahr]

Thanks for the reply, fellas! @ Canuck, yes it's level and all is there that should be, I even compared with the 105 next to it. With the right deck out I was watching, that's how I saw the failure occur (otherwise if I pulled the tray to remove the jam it destroyed the sheet.) I watched the sep roller stay completely motionless and knew that to be wrong. I ended up pushing up on the frame that the seperation roller assembly is mounted to and then noticed that the roller became active at that point and actually started work as it should. One piece of info I should've let you in on...it's a refurb (we'll leave it at that) and I've been chasing these type issues for a while, now.

Anyhow, thanks again for the replies, as one thing I didn't think about was the sensor adjustment which I will perform tomorrow.

Also, check you pm for email addy, Oze.

[Oze]

Email sent...
The article refers to the EXACT type of jam that you mentioned...the paper diving under the sep roller.
It's for the ir7000 series...but 105's have the same PF system.

[20YRSEXP]

Get back with the results, you've got my interest. A new unit works in a different machine, did you put the bad unit in the other machine and see if the problem follows? But it sounds like you isolated the problem to the machine, is that correct? And just curious, how many copies are on the machine?