MXFN27N jam

**Lawrence** · 02-18-2021

Howdy folks,

Got a MXFN27N that has jam code FNPS1_S. It does not jam every time but there has been 9 jams in the last week.

Ive seen it jam, the "assist claw" do not seem to be returning home after they push the paper out to the exit tray. When the next sheet enters the finisher compiler it crashes into those claws and starts piling up.

Has anybody seen this? The timing is very tight, those claws push out and have to reverse almost instantly.

I ran mot FNM5 which operates those claws, the first time the claws cycled and then stopped. Machine seemed totally locked up. Had to power cycle. Rebooted and ran the motor fine on and off.

Pic attached.
fn27.JPG

**mloudy** · 02-19-2021

We replace the entire unit, 501. We had a tech try and "re-time" the units. He explained to me in detail what he did and sketched it out but he lost me after a few minutes. I'm not exactly sure how it did it. He spent hours trying to figure it out. He did a few with very limited success.

Perhaps there is someone here that has figured out this crashing.

**doyvid** · 02-19-2021

Was a long time ago so I forget the exact details. I added a piece of fairly stiff but flexible plastic sheet that covered the mostly non-moving sections around those exit belts, I think it was "E" shape, and taped it with double sided tape. Some of the "E" had tape on it, some did not, where stuff had to move underneath. That actually worked well for the short term - a month or two. I made sure the customer knew not to remove it. It was the same jam code FNPS1_S.

**doyvid** · 02-19-2021

Another thing you can check. Senior tech went back later and found a broken part in the fusing drive unit, see attachment. Fixable by melting a paper clip into it.

**sharptech** · 02-19-2021

Try Sharp`s REP2304 as it explains the process to re align the unit. My suggestion is to replace the unit.

T.G.G.

**Lawrence** · 02-19-2021

Originally Posted by doyvid

Another thing you can check. Senior tech went back later and found a broken part in the fusing drive unit, see attachment. Fixable by melting a paper clip into it.

So far no jamming driving to the right hand exit tray so hopefully its not this. Ill know when i got back with a loaner finisher today. Thx

Originally Posted by sharptech

Try Sharp`s REP2304 as it explains the process to re align the unit. My suggestion is to replace the unit.

T.G.G.

So it sounds like that unit is getting out of sync causing issues? I didnt see that REP on the sharp Canada site. Ill email my guy at Sharp and see if he can dig up that one.

**miller01123@gmail.com** · 02-24-2021

I've found that the center pusher on the assist unit locks up on the guide shaft and causes the unit to go out of timing. This starts to happen after 40 to 50 thousand copies. The only solution is to change the assist unit.