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

[Techalyzer]

Hello,

I have this weird problem with a Bizhub 423. At every print from tray 1, the paper jams, sometimes at the first sheet, sometimes after a few sheets. Always jam code 3001. 537K copies on the machine. I have found a similar thread here, and it mostly points to the paper exit assembly cable/connectors or the wrong type of paper feed assembly used for tray 1. I have checked the imaging unit, registration unit, fixing unit, paper transport, it all looks perfect, one of the best looking machines I've worked on, minimal to inexistent wear, nothing wrong mechanically.

And indeed, upon inspection, the tray feed assembly is the usual kind you find on other slower models, 3 sensors, 3 extra free pins on the main connector probably left for the missing sensor.

The catch is this: it's only my 4th day in this company and obviously I don't want to seem to be... "that guy". The person who deals with it says that's how it was before, with that same tray 1 paper feed assembly, and it worked just fine. I somehow doubt that, you can see the feed assembly clearly in the parts manual and it's not what we have here. But... being my 4th day, I'm really reluctant to start contradicting with people during my first week.

Any advice?

[Toxic]

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

Check registration roller is it turning hard by hand.
Worn bushings are common problem on machines with high volume counter.
Try to lube bushings, if than does not jam you know what to order.
1164354901 BUSHING

Also clutch may be bad but in that case usually print postition is not good on paper.
A1UDM20000 Clutch

[Techalyzer]

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

Try to lube bushings, if than does not jam you know what to order.
1164354901 BUSHING

Also clutch may be bad but in that case usually print postition is not good on paper.
A1UDM20000 Clutch

As I said, everything mechanical is in pristine condition. Lubed bushings, clutch is already new. Exactly the same problem.

[Toxic]

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

Where is location of jammed paper?
Is paper crumpled or straight when jam?
And jamming only from tray 1 specific?

[REGSIS]

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

Check registration roller is it turning hard by hand.
Worn bushings are common problem on machines with high volume counter.
Try to lube bushings, if than does not jam you know what to order. :ll
1164354901 BUSHING

Also clutch may be bad but in that case usually print postition is not good on paper.
A1UDM20000 Clutch

Registration clutch 100%
J30-01, sometimes J99-01. Usually starts with paper jam fro. tray1, tray2 is not affected due to longer paper path.

P.S. Blow out the sensor also!

[tsbservice]

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

J30-01
SymptomCountermeasure
Check the version of the firmware. If the version is lower than the followings, update the firmware to the following versions (or above).
Program name: bizhub 423/363/283/223 MFP Firmware
File name to download: [A1UD0Y0-F000-G00-C2.exe]

[Hap]

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

J30-01
SymptomCountermeasure
Check the version of the firmware. If the version is lower than the followings, update the firmware to the following versions (or above).
Program name: bizhub 423/363/283/223 MFP Firmware
File name to download: [A1UD0Y0-F000-G00-C2.exe]

Another thing is if someone had the registration assem out and got the mylar under the guide instead of over easy to do and only will jam from tray 1 something to check

[Techalyzer]

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

J30-01
Countermeasure
Check the version of the firmware. If the version is lower than the followings, update the firmware to the following versions (or above).
Program name: bizhub 423/363/283/223 MFP Firmware
File name to download: [A1UD0Y0-F000-G00-C2.exe]

I suspect this might be the case.

I tried with tray 2, same behavior but the paper gets jammed in a different place, the 2 big rubber rollers on the machine over tray 2 exit. I watched the paper in tray 2, a few sheets came out, then a sheet got stuck in something. Slowly opening the side cover, I noticed it was as if those 2 big rollers got stuck, the paper couldn't get past them.

As I said before, all clutches are BRAND NEW, and mechanically everything is perfect, all sensors are cleaned, everything is perfectly clean, lubricated, nothing is dirty or stuck or worn out. It feels like there's some kind of software problem, locking stuff while there's still paper passing through.

One problem though, I tried to check the firmware version, there are 5 pages full of firmware versions, half of them with MFP in the name... which one am I looking at?

[tsbservice]

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

I suspect this might be the case.

I tried with tray 2, same behavior but the paper gets jammed in a different place, the 2 big rubber rollers on the machine over tray 2 exit. I watched the paper in tray 2, a few sheets came out, then a sheet got stuck in something. Slowly opening the side cover, I noticed it was as if those 2 big rollers got stuck, the paper couldn't get past them.

As I said before, all clutches are BRAND NEW, and mechanically everything is perfect, all sensors are cleaned, everything is perfectly clean, lubricated, nothing is dirty or stuck or worn out. It feels like there's some kind of software problem, locking stuff while there's still paper passing through.

One problem though, I tried to check the firmware version, there are 5 pages full of firmware versions, half of them with MFP in the name... which one am I looking at?

MFP controller/MFP card version.

[copyman]

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

Another thing is if someone had the registration assem out and got the mylar under the guide instead of over easy to do and only will jam from tray 1 something to check

This is exactly what I was thinking. Easy enough to check

[Techalyzer]

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

This is exactly what I was thinking. Easy enough to check

Someone did get the registration assembly out. It was me, multiple times. The mylar is just fine. As I stated above, for tray 2, the blockage now occurs at the 2 big rollers above tray 2 feed, as if they don't turn. Again, as I stated above, and I quote, "all clutches are BRAND NEW, and mechanically everything is perfect, all sensors are cleaned, everything is perfectly clean, lubricated, nothing is dirty or stuck or worn out". This is by far the cleanest, least worn out machine I have ever seen. The thing is literally new.

Anyway, it's getting late here, I'm going to sleep and tomorrow I'll probably try a firmware update. A big hint is that apparently we have another 423 with the exact same issue.

[tsbservice]

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

A4-R size tried and still jamming?

[femaster]

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

...or the wrong type of paper feed assembly used for tray 1...
And indeed, upon inspection, the tray feed assembly is the usual kind you find on other slower models, 3 sensors, 3 extra free pins on the main connector probably left for the missing sensor.
Any advice?

The 423 uses feed units that are unique to that model. The slower machines, (223, 283, 363) use different feed units. The 3 slower models use a sensor flag (black plastic actuator similar to what is found under the registration rollers), while the 423 uses direct reflection optical sensors in the feed units. The feed units are NOT interchangeable.

Here is an example from the service manual so you know what to look for:

FeedUnit423vsSlower.jpg

I can't tell you this will help you fix your jamming issues, but it will clear up whether or not you have the correct feed units in the machine. The registration sensor in all the models is an actuator type, and the main 2 paper feed units in the 423 are optical reflective, no actuators involved...

[Techalyzer]

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

Here is an example from the service manual so you know what to look for:

[ATTACH=CONFIG]52416[/ATTACH]

That's the one. Definitely optical. As I said, switching between tray 1 and tray 2, the jam appears in a totally different place, but the behavior is identical, as if the machine actuates things with the wrong timings. So I think it is unlikely to be something physical.

MFP controller/MFP card version.

MFP controller is A1UD0Y0-0100-G00-D6. So I guess I should update?

[Techalyzer]

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

L.E.: I tried to update to A1UD0Y0-F000-G00-D6. Firmware update goes well, start button goes blue, I turn the machine off, turn it back on, it starts normally aaaaaand... firmware version is still A1UD0Y0-0100-G00-D6.

Is it possible that I did something wrong? Or is the machine messed up worse than I thought?