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mostertbj
12-02-2014, 12:23 PM
Hi, I'm struggeling with a bizhub 1050.

The mc makes a dirty mark on the edge of the copies (on the front side or the back side of the machine depending on the drum). The mark looks like charge buildup (I've blocked off the laser and it still makes the mark. there is nothing on the drum after the c/blade - so it's not the cleaner unit (new), I've replaced the PCL, Charge carona, T/s carona, develper, dev tank, drum shaft bearings, cleaner unit).

When making copies on A3 paper and folding the paper to align the marks - the distance coinsides with the drum circumfence.

After replacing the drum again it made just over 100K before the problem started again (tried it with 3 drums - all give the same tipe of problem, one on the front side of the machine and the other two on the back side of the machine.

Any ideas?

Best regards

KM1Amsterdam
12-02-2014, 04:55 PM
Are u sure it is the drum, not the fuser?

Maybe a hiccup in drum rotation?

allan
12-02-2014, 05:22 PM
Can you take photos of the marks?

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