[Jamming] C253 jamming instantly

[xdelios]

Hello to everyone,

To clarify I am not a professional regarding copiers, I simply use some KM machines because clients use them and I do provide the consumables to them.

I personally use a C253 which for me honestly it has been a great machine so far.

Now to my issue, few days ago I replaced the transfer belt with a brand new one. Everything good there.

I also remanufactured the black IU my self, adding new drum with blade and developer. Chip was changed as well.

After making the change I got some p21 warnings and c2558 errors which I think I solved cause I removed the idc sensors and cleaned them. Did not have the same issue again.

I starting having jams at my 1st tray though after I changed the IU. I thought this can't be a coincidence but what the heck I'll change the feed rollers since I had a sealed set already. Did the swap.

Nothing changed though. It's very weird, because it's jamming literally every time and it's not even picking up paper. I mean not jammig between the rollers or anything.
I thought maybe the motor but what are the chances really...

I hope my English make sense so you can understand my sissue.
Any ideas and suggestion would be much appreciated

Thank you in advance

[Synthohol]

Re: C253 jamming instantly

Please post the jam code although I'm almost sure it's the one way bearings based on history of the machine.

[tsbservice]

Re: C253 jamming instantly

Hello to everyone,

To clarify I am not a professional regarding copiers, I simply use some KM machines because clients use them and I do provide the consumables to them.

I personally use a C253 which for me honestly it has been a great machine so far.

Now to my issue, few days ago I replaced the transfer belt with a brand new one. Everything good there.

I also remanufactured the black IU my self, adding new drum with blade and developer. Chip was changed as well.

After making the change I got some p21 warnings and c2558 errors which I think I solved cause I removed the idc sensors and cleaned them. Did not have the same issue again.

I starting having jams at my 1st tray though after I changed the IU. I thought this can't be a coincidence but what the heck I'll change the feed rollers since I had a sealed set already. Did the swap.

Nothing changed though. It's very weird, because it's jamming literally every time and it's not even picking up paper. I mean not jammig between the rollers or anything.
I thought maybe the motor but what are the chances really...

I hope my English make sense so you can understand my sissue.
Any ideas and suggestion would be much appreciated

Thank you in advance

What about tray 2? As a test swap rollers and oneways/torque limiter between 2 trays.

[copyman]

Re: C253 jamming instantly

Hello to everyone,

To clarify I am not a professional regarding copiers, I simply use some KM machines because clients use them and I do provide the consumables to them.

I personally use a C253 which for me honestly it has been a great machine so far.

Now to my issue, few days ago I replaced the transfer belt with a brand new one. Everything good there.

I also remanufactured the black IU my self, adding new drum with blade and developer. Chip was changed as well.

After making the change I got some p21 warnings and c2558 errors which I think I solved cause I removed the idc sensors and cleaned them. Did not have the same issue again.

I starting having jams at my 1st tray though after I changed the IU. I thought this can't be a coincidence but what the heck I'll change the feed rollers since I had a sealed set already. Did the swap.

Nothing changed though. It's very weird, because it's jamming literally every time and it's not even picking up paper. I mean not jammig between the rollers or anything.
I thought maybe the motor but what are the chances really...

I hope my English make sense so you can understand my sissue.
Any ideas and suggestion would be much appreciated

Thank you in advance

If it was a motor it would throw a code. Do you hear it trying to feed paper. Sometimes it's hard to tell, you can remove paper tray and mark rollers to see if moving.

The black unit sits above tray one feed rollers so maybe some toner dropped onto rollers so I would still look at the paper feed. The black IU has nothing to do with a feeding issue so rule that out.

You said you aren't a tech so wanted to mentioned since those paper feed units have to be disassembled to replace the rollers perhaps you missed something, like making sure pick up roller is dropping down. It's easy to miss putting the lever "under" the plastic piece which gives spring to the pick up rollers. Did you clean one ways with alcohol & scuff up the shaft where the one way sits?

[xdelios]

Re: C253 jamming instantly

Please post the jam code although I'm almost sure it's the one way bearings based on history of the machine.

I suppose I can find that in the service mode. Could you tell me where do I find that?
Sorry for the silly question , I honestly do not know though.

What about tray 2? As a test swap rollers and oneways/torque limiter between 2 trays.

Tray 2 was always jamming from the moment I got the machine so I never touched it to be honest.

If it was a motor it would throw a code. Do you hear it trying to feed paper. Sometimes it's hard to tell, you can remove paper tray and mark rollers to see if moving.

The black unit sits above tray one feed rollers so maybe some toner dropped onto rollers so I would still look at the paper feed. The black IU has nothing to do with a feeding issue so rule that out.

You said you aren't a tech so wanted to mentioned since those paper feed units have to be disassembled to replace the rollers perhaps you missed something, like making sure pick up roller is dropping down. It's easy to miss putting the lever "under" the plastic piece which gives spring to the pick up rollers. Did you clean one ways with alcohol & scuff up the shaft where the one way sits?

I will try marking the rollers and ser if they are moving, I did not think of that.
I inserted the lever as it should be , I was aware of that so I did not miss it.

I did not clean the one ways , to be honest I am not aware at what you are reffering to.
Could you give me the PN of the item you are talking about so I can see it in the service manual?

Thank you all for taking the time.

[xdelios]

Re: C253 jamming instantly

Please post the jam code although I'm almost sure it's the one way bearings based on history of the machine.

Found it the error code is 1101

[xdelios]

Re: C253 jamming instantly

If it was a motor it would throw a code. Do you hear it trying to feed paper. Sometimes it's hard to tell, you can remove paper tray and mark rollers to see if moving.

The black unit sits above tray one feed rollers so maybe some toner dropped onto rollers so I would still look at the paper feed. The black IU has nothing to do with a feeding issue so rule that out.

You said you aren't a tech so wanted to mentioned since those paper feed units have to be disassembled to replace the rollers perhaps you missed something, like making sure pick up roller is dropping down. It's easy to miss putting the lever "under" the plastic piece which gives spring to the pick up rollers. Did you clean one ways with alcohol & scuff up the shaft where the one way sits?

The rollers are spinning normally I checked.
The thing is the jam is not happening between the rollers, meaning the paper does not actually leave the tray.

I checked the lift motor its working fine.
I guess it those "one ways" that I have no idea what it is I am looking for to be honest.

[blackcat4866]

Re: C253 jamming instantly

Start with some new rollers. Better yet, two full sets (do tray two also).

For each tray you'll want (3) A00J 5636 00 (or a total of 6 for both trays).
Don't waste you're time on the generic substitutes. You'll get ~30% yield compared to the originals.

Soak one-way bearings in alcohol, dry, then add a drop of light oil to each one-way bearing. The one-way bearings are black colored cylinders in line with the feed rollers. I think I have an illustration:

Torrington_One-Way Bearing.jpg
=^..^=

[xdelios]

Re: C253 jamming instantly

Start with some new rollers. Better yet, two full sets (do tray two also).

For each tray you'll want (3) A00J 5636 00 (or a total of 6 for both trays).
Don't waste you're time on the generic substitutes. You'll get ~30% yield compared to the originals.

Soak one-way bearings in alcohol, dry, then add a drop of light oil to each one-way bearing. The one-way bearings are black colored cylinders in line with the feed rollers. I think I have an illustration:

[ATTACH=CONFIG]51677[/ATTACH]
=^..^=

Hello,

Thank you the image helps a lot.
I have installed brand new unsed rollers so in that part I am good I suppose.
I also installed new clutches since I had those sealed as well.

I will do what you suggested with the one-way bearings.
HOpe this works I will update the thread.

Thank you

[femaster]

Re: C253 jamming instantly

Hello,

Thank you the image helps a lot.
I have installed brand new unsed rollers so in that part I am good I suppose.
I also installed new clutches since I had those sealed as well.

I will do what you suggested with the one-way bearings.
HOpe this works I will update the thread.

Thank you

There are many opinions on the forum here about the one way bearings. The whole point of them is to spin freely in one direction and grab the shaft securely in the other direction. You can use your own discretion here, but I personally clean them and don't oil. I don't feel like something that needs to grab securely should have oil on it to make things slippery. I also use a mild abrasive, like a scotch bright pad (green colored), to scuff up the metal shaft where the one way rides. The shaft gets a mirror like finish from the bearing turning on it, which makes the shaft slippery. Scuffing the shaft under the bearing gives it something to grab onto. You don't want to carve up the metal shaft, but just a light scuffing to the point where the shaft is no longer reflective, but dull looking.

Good luck.

[xdelios]

Re: C253 jamming instantly

Start with some new rollers. Better yet, two full sets (do tray two also).

For each tray you'll want (3) A00J 5636 00 (or a total of 6 for both trays).
Don't waste you're time on the generic substitutes. You'll get ~30% yield compared to the originals.

Soak one-way bearings in alcohol, dry, then add a drop of light oil to each one-way bearing. The one-way bearings are black colored cylinders in line with the feed rollers. I think I have an illustration:

[ATTACH=CONFIG]51677[/ATTACH]

=^..^=

Hello again,

just to clarify there is 1 x one way bearing or am I missing something?

Thank you

[tsbservice]

Re: C253 jamming instantly

There are 2 of them one on pickup roller and one on feed, sep roller has torque limiter.

[xdelios]

Re: C253 jamming instantly

There are 2 of them one on pickup roller and one on feed, sep roller has torque limiter.

Hello,

Thank you for your fast reply.
To clarify on the feed roller its the white plastic ?
And on feed roller its the black one that is hold in place by a small metallic shaft?

Do I undesrtand correctly that those 2 are the ones ?

Thank you and sorry for the newbie questions just wanna be sure.

[tsbservice]

Re: C253 jamming instantly

Hello,

Thank you for your fast reply.
To clarify on the feed roller its the white plastic ?
And on feed roller its the black one that is hold in place by a small metallic shaft?

Do I undesrtand correctly that those 2 are the ones ?

Thank you and sorry for the newbie questions just wanna be sure.

This is oneway clutch: see picture
Konica Minolta A02E561100 (A02E-5611-00) Clutch, Genuine (M5085)

[xdelios]

Re: C253 jamming instantly

This is oneway clutch: see picture
Konica Minolta A02E561100 (A02E-5611-00) Clutch, Genuine (M5085)

Ah ok then its weird because I installed new clutches on both the rollers.

I haven't oiled anything though.
I got 2 new original clutches like in your picture and and replaced the old ones.

Still having jams though.