Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

[femaster]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

On this model the Theory Of Operation is a separate document. It's not part of the handbook.
=^..^=

Don't know what to say to that. The service manual I have, downloaded directly from KM USA, has everything all in one PDF...

PDF Bookmarks.jpg

Well, it seems it is not part of my manual, these are the only references to the word "Theory" I can find in my manual.
[ATTACH=CONFIG]52441[/ATTACH][ATTACH=CONFIG]52442[/ATTACH]

You must have an incomplete manual. The text in the first image is clearly telling you that both sections are contained in the manual, "This service manual consists of Theory of Operation section and Field Service section..."
Anyway, back to the topic at hand...

It's possible that the registration clutch is slipping. Fairly common on this series. I just replaced one 2 days ago in a 423 because I could only get a couple pages out of the machine before it would jam with a J3001. Check the pages that you are actually getting out of it, and see if the lead edge is off on any of the pages. If you have another machine, temporarily swap the whole registration/transfer assembly out of it and see if the problem goes away. It's much easier to swap the whole assembly than it is the swap just the clutch for testing purposes.

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

It's possible that the registration clutch is slipping. Fairly common on this series. I just replaced one 2 days ago in a 423 because I could only get a couple pages out of the machine before it would jam with a J3001. Check the pages that you are actually getting out of it, and see if the lead edge is off on any of the pages. If you have another machine, temporarily swap the whole registration/transfer assembly out of it and see if the problem goes away. It's much easier to swap the whole assembly than it is the swap just the clutch for testing purposes.

It's not the clutch. All assemblies have been swapped, the current ones have been verified to the last screw.

[tsbservice]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

Don't know what to say to that. The service manual I have, downloaded directly from KM USA, has everything all in one PDF...

[ATTACH=CONFIG]52453[/ATTACH]



You must have an incomplete manual. The text in the first image is clearly telling you that both sections are contained in the manual, "This service manual consists of Theory of Operation section and Field Service section..."
Anyway, back to the topic at hand...

It's possible that the registration clutch is slipping. Fairly common on this series. I just replaced one 2 days ago in a 423 because I could only get a couple pages out of the machine before it would jam with a J3001. Check the pages that you are actually getting out of it, and see if the lead edge is off on any of the pages. If you have another machine, temporarily swap the whole registration/transfer assembly out of it and see if the problem goes away. It's much easier to swap the whole assembly than it is the swap just the clutch for testing purposes.

I have them both - service manual and Theory of Operation as 2 different PDFs. I think SM was divided in past on two PDFs before they put them both in one document as usual.

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

I don't know if anybody mentioned the drive motors just slow down in this series. try exchanging the main drive with the developer drive motor. this problem happens sooner on the faster models in this series.

I switched the motors between them. I replaced them with other ones from a functional machine that even looked and felt less worn. Same problem.

So what happened so far:

SYMPTOM: Paper jam error code 1201 from tray 2 and 3001 from tray 1. It could happen at the first page or after 20 pages go through just fine.

WHAT I TRIED:

- Checked and replaced all assemblies - Fixing, imaging, registration, paper feeds, paper exit. Replaced all rollers. All checked to the last screw, nothing worn out, nothing stuck, nothing dirty, nothing bent, broken or otherwise not right. The general condition of all assemblies could be described as almost brand new, one of the best looking machines I've seen.

- Registration roller bushings lubed, roller moves easily by hand; print position on paper is perfect

- All clutches have been replaced and work just fine

- All mylar sheets are straight and going where they should go; I don't know about the mylar Blackcat is talking about, as he refused to give any clear indication about where that mylar is located, pointing out to a Theory of Operation manual, that at least in my workplace, is not a thing, nor can it be found on Google

- I tried to update firmware from A1UD0Y0-0100-G00-D6 to A1UD0Y0-F000-G00-D6. It remained at A1UD0Y0-0100-G00-D6

- I switched the main drive motors between them. I replaced them with other ones from a functional machine that even looked and felt less worn


The problem persists just like day one, nothing changed.

HELP?

[copyrooks]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

I would say have a look at the tray cassettes make sure no morped or broken pieces. If no dice then i would say take out the main drive assy. Maybe a broken gear on the assy . Good luck

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

I would say have a look at the tray cassettes make sure no morped or broken pieces. If no dice then i would say take out the main drive assy. Maybe a broken gear on the assy . Good luck

If a gear was broken, would it output 10-20-30 pages just like a perfectly functional machine before jamming the paper?

Nothing wrong with the cassettes.

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

So I guess I should just give up and use it for parts?

[Hansoon]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

So I guess I should just give up and use it for parts?

I personally would NEVER give up. Not only because since this is a fine machine but also cause I MUST know what's behind it.

The best tool a copier tech has is Endurance.

Hans

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

I personally would NEVER give up. Not only because since this is a fine machine but also cause I MUST know what's behind it.

The best tool a copier tech has is Endurance.

Hans

I'm exactly the same, however, when you are an employee there are some limitations. Especially in these times.

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

This is my only question left unanswered so far:

Is firmware version A1UD0Y0-0100-G00-D6 the same as A1UD0Y0-F000-G00-D6 ?

[Toxic]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

https://www.copytechnet.com/forums/konica-minolta/164229-bizhub-423-3001-jam-suspecting-wrong-tray-1-paper-feed-assembly-2.html#post2119815

[Techalyzer]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

https://www.copytechnet.com/forums/k...ml#post2119815

Thanks. That helped a lot.

[tsbservice]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

If you want to do firmware PM me and I will check newest FW I have for bh423.

[femaster]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

This is my only question left unanswered so far:

Is firmware version A1UD0Y0-0100-G00-D6 the same as A1UD0Y0-F000-G00-D6 ?

A1UD0Y0-F000-G00-D6 - Latest BASE FIRMWARE, Released Oct 22, 2012
A1UD0Y0-0100-G00-D6 - Firmware version specific to the MFP Controller contained in the A1UD0Y0-F000-G00-D6 firmware package.

[cyta123]

Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly

Try to change clutch A00FM20000



cl11.JPG