[CQ] Konica Minolta Bizhub C258 Mono / Greyscale Image Quality

[insigniawales]

I have a copy quality issue on a bizhub C258, only on the greyscale / mono prints

There was a mark on the transfer belt initially so I changed the transfer belt sleeve in oppose to the transfer belt unit - this is the first time I've done this and I'm not sure how succsesful this is or not. Any comments on this method please let me know.

I also changed the Drum unit and changed the black developer unit - problem still persisted.

Its only happening on mono / greyscale prints. - so I'm this steers me away from the transfer belt as this would happen on all of the colours.

Any help or suggestions much appriciated.

C258 Fault

[Gaffers01]

Ok, so was it doing this before you changed the belt?

Was the drum unit new? Genuine?

Have you cleaned the sight glass under the drums ?

Have you run the calibrations in the service screen?

[aberock]

why not clean the laser unit 1st before change the most valuable ITB film hehe

[insigniawales]

It has had a new remanufacured drum (k) x 2

Cleaned the lsit glass on the laser unit,

Run all of the calibrations in service mode.

Before we changed the belt unit we had a mark on the prints, so the image below is before the transfer belt replacement.

C258 Fault

[aberock]

It has had a new remanufacured drum (k) x 2

Cleaned the lsit glass on the laser unit,

Run all of the calibrations in service mode.

Before we changed the belt unit we had a mark on the prints, so the image below is before the transfer belt replacement.

C258 Fault

check fuser unit for the mark

[Ziggy]

Pull laser unit to clean the glass. The wand does not always clean the glass good enough