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Laserbeam
04-18-2019, 05:43 PM
Hello,

a bizhub C458 basically shows jam-Code 12-01 only from tray 2. Tray 1 is working fine.
If I remove tray 1 and watch the two feed rollers of tray 2, I notice that these didnīt rotate, a tiny movement, maybe 1 mm can be observed.
I renewed paper feed roller (PN A64J564101 and A64J564201) and the two clutches A02E561100), CL 1 (PN A64JM2000), unfortunatelly without success.
The error seems to come from the Main Drive/Paper Feed Drive Section (on the rear side of the machine) :confused:

tech51
04-18-2019, 06:15 PM
Well, looks like you’ve fixed your own problem....Replace the drive unit!

We have had quite a few fail on that model.

Laserbeam
04-18-2019, 07:54 PM
Hi tech51,

many thanks for your fast reply! Can you tell me more? What do I have to exchange? Do you mean the Paper Feed Drive Assy (PN A79JR70222) ?

Bix
04-19-2019, 03:27 PM
Hi, I've had this problem in a 458 recently.


Do you know the black rolls of Paper Feed Assy (bizhub 458 is A9HGR70800)? There! In my case, they were the problem. I simply took isopropyl alcohol and I cleaned them.


Sometimes they seem to have no problems, but if you magically rub back to work.

Synthohol
04-20-2019, 01:43 AM
those finned roller are as useless as roadkill lizard, pop a regular red roller on it and you have no more skimming jams.
that IMHO was konicas biggest error.
they are ok for glossy paper but any paper that has a high dust content or recycled paper they start to jam at 20-30k
honestly, i take the rubber off a00j563600 rollers and put them on the locking axles. so much better.

tsbservice
04-20-2019, 12:22 PM
42415

Replace one way gear and clear black coating on the shaft in case of Jams from Tray 1,2 and bypass.

Laserbeam
05-17-2019, 03:26 PM
@ tsbservice,

yes, the one-way gear was the problem! It was seized on the shaft. I renewed the gear and the shaft and now everything works fine.

Thanks for your tip!

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