Black line C258

[Bix]

abtast10.jpg
hi, today I found a strange call.


the customer signals me a black line on his bizhub c258. The printer has only 60k and this seems a little strange to me.


The sign is perfectly linear and always in the same point. Sometimes it is more evident sometimes a little lighter. I found a toner line in the metal part of the belt roller. I cleaned without result.


It happens both in color and black and white prints. The surface of the black drum does not seem to have signs, as soon as I extracted I found a white dot that I removed but did not solve the problem.


The calibration is unfortunately not worked.
Some idea?

[tsbservice]

Re: Black line C258

I would crash stop machine during copy/print to see where is the black line. It looks like K drum has small scratch, or its cleaning blade fails. Check for small piles of toner/developer along dev unit, TBU etc. Good luck.

[tech51]

[copyman]

Re: Black line C258

If you run single colors in test mode and no lines on the 3 colors then only thing it could be is K drum. It use to be easy to confirm this by swapping K drum & chip with a color drum, but now the chips are riveted in.

Think you are going to find it is the K drum.

[Copier Addict]

Re: Black line C258

If the black drum has reached it yield there is a 99.99% chance the drum is at fault.

[tsbservice]

Re: Black line C258

At 60k I highly doubt that K drum is due(by any count), but yet it seems most likely at fault.

[tech51]

Re: Black line C258

At 60k I highly doubt that K drum is due(by any count), but yet it seems most likely at fault.

[darry1322]

Re: Black line C258

I replaced a C308 black drum last week for a similar problem. Drum surface looked beautiful, but the new drum cleared it right up.

[tsbservice]

Re: Black line C258

At 60k I highly doubt that K drum is due(by any count), but yet it seems most likely at fault.

Yeah, long time ago I heard about drums rotations time, cars oil change based not on mileage but on actual usage/idling/driving conditions etc. Still can't believe that in this case K drum is due by any count.

[tech51]

Re: Black line C258

Yeah, long time ago I heard about drums rotations time, cars oil change based not on mileage but on actual usage/idling/driving conditions etc. Still can't believe that in this case K drum is due by any count.

[allan]

Re: Black line C258

I replaced a C308 black drum last week for a similar problem. Drum surface looked beautiful, but the new drum cleared it right up.

Something on the charge roller?

If that is the case i will have a wack at cleaning it.

[darry1322]

Re: Black line C258

Something on the charge roller?

If that is the case i will have a wack at cleaning it.

Charge roller was clean and pristine as well.

[tsbservice]

Re: Black line C258

I can't pretend to be KM expert by any means, and seems from what I have read that you knowing Bizhubs to the bones. Luckily, I had no premature wear on 8 series drums but that issue is known to me and sharing your experience on new long life drums will be nice.

[allan]

Re: Black line C258

Charge roller was clean and pristine as well.

Mag roller?


Bix it looks like there could be a repeating pattern were the line goes from fat to thin on that sample can you get a measurement of that?

[Bix]

Re: Black line C258

Heck, I've forgotten patterns. Indeed they could tighten for the solution of the problem.


I will try with the replacement of the K drum. I have many series 8 and the drum has always almost respected his life. This could be one of the first cases. In any case, the printer at 2 years then the drum could be aged (?) I keep you updated

Switch from thin to thick and vice versa between 5-10 pages