[Jamming] Sharp MX-M623 POD1_N

[Froota]

Hi,

We have some remaining troubles on a Sharp MX-M623, where the paper is jamming between the fusing unit and the transfer unit. (Jam code POD1_N)
The strange thing is that the 1e jammed paper is just entering the fusing entrance, while the rest of this paper is bend 'behind' the transfer unit, it's like the paper is sticking on the transfer belt and flips over.(see attachment).
If we print multiple papers we have the same issue, while the second paper is ready between the registration, what's normal.
At some times the paper is fully bend behind the transfer unit instead of even reaching the fusing entrance.

Sometimes we can print 100 pages, other times we continuously are having the same jam, not regularly.

We already replaced the transfer unit, fusing unit and paper pass detect sensor, and also dismounted the delivery unit and registration unit.
The drum and development unit are looking and rotating fine, and we could drive all the motors and check all the sensors, but no visible issues.

Maybe you guys have some other thoughts?

Thx in advance!

FrootaIMG_1754.JPGIMG_1755.jpgIMG_1756.jpg

[sharphead]

Re: Sharp MX-M623 POD1_N

The transfer unit has two connectors that link it to the main body when the door is closed. Make sure that the connection is good.

[nottoosharp]

Re: Sharp MX-M623 POD1_N

Hi,

We have some remaining troubles on a Sharp MX-M623, where the paper is jamming between the fusing unit and the transfer unit. (Jam code POD1_N)
The strange thing is that the 1e jammed paper is just entering the fusing entrance, while the rest of this paper is bend 'behind' the transfer unit, it's like the paper is sticking on the transfer belt and flips over.(see attachment).
If we print multiple papers we have the same issue, while the second paper is ready between the registration, what's normal.
At some times the paper is fully bend behind the transfer unit instead of even reaching the fusing entrance.

Sometimes we can print 100 pages, other times we continuously are having the same jam, not regularly.

We already replaced the transfer unit, fusing unit and paper pass detect sensor, and also dismounted the delivery unit and registration unit.
The drum and development unit are looking and rotating fine, and we could drive all the motors and check all the sensors, but no visible issues.

Maybe you guys have some other thoughts?

Thx in advance!

Froota[ATTACH=CONFIG]34978[/ATTACH][ATTACH=CONFIG]34979[/ATTACH][ATTACH=CONFIG]34980[/ATTACH]

Check the fuser motor. I recently had this issue. It's easy to check, and and easy fix if it is the problem. Mine had just worn out after 3.4 million pages. The clutch being worn out caused the fuser to start just a little late and I had the same codes. Pages ending up behind the transfer unit as well. This may not be the solution for your problem, but it can't hurt to check.


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[nottoosharp]

Re: Sharp MX-M623 POD1_N

By the way when running sim 6-1 the fuser seemed to turn as normal even with the faulty clutch. Good luck


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[Froota]

Re: Sharp MX-M623 POD1_N

I also found some threads about same issues about a slipping one way gear on the shaft that drives the fusing unit.
Will order both parts and see if it's a solution.
The main fusing motor is turning well, also both little motors in the fusing drive unit.

[nottoosharp]

Re: Sharp MX-M623 POD1_N

I also found some threads about same issues about a slipping one way gear on the shaft that drives the fusing unit.
Will order both parts and see if it's a solution.
The main fusing motor is turning well, also both little motors in the fusing drive unit.

My motor turned fine as well. Just a tiny delay caused a jam


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[Alpanapa]

Re: Sharp MX-M623 POD1_N

I have had two machines with this error before.


Everything looks nomalt even if I run SIM 6-1.


But I changed fuser drive unit and the machine working just fine (I switched the fuser drive unit on a machine for over 1 year ago and still no paper jam, the other one 3 month ago and still no jam)

[dwarf]

Re: Sharp MX-M623 POD1_N

the problem is a one-way clutch in the fuser drive assy... p/n NGERH1581FCZ1...

[nottoosharp]

Re: Sharp MX-M623 POD1_N

the problem is a one-way clutch in the fuser drive assy... p/n NGERH1581FCZ1...

That's the issue that I ran into on a 550 just two weeks ago. I changed every damn component I could think of and couldn't figure out where the paper was crashing because it wasn't crashing and it turned out to be that clutch


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[repn1999]

Re: Sharp MX-M623 POD1_N

There is a tech bulletin from sharp on this issue, and basically it says to replace the fuser drive unit assembly. All of the parts have been changed in the unit, and if you just replace the failing part, you will be back to do it again. My advise, replace the unit. I have about 100 of these in the field and that has been the fix every time.

[Toner Boy]

Re: Sharp MX-M623 POD1_N

Don't discount paper as a possible issue. We changed nearly everything mentioned and switched paper (same weight) and problem solved (753N). The paper they had been using may have been exposed to moisture, some packages were torn.
Changed my theory that paper is what lame techs blame when they can't fix something...

[coopers1305]

Re: Sharp MX-M623 POD1_N

I'd change the 2nd xfer unit out with a new one. I'm just guessing by the looks of your photos.