Bizhub C353 grey and cyan background bands

[wilbing]

My customer noticed some grey and cyan bands in the background halfway through a large copy run, the first hundred were ok then the rest with the bands on. The bands have a repeat pattern that, on a run, will move up the page but each band is different and has a pattern through it. The black IU was indicating replacement required, this has been changed and made no difference. I have also tried another transfer belt and checked all connections in the machine. I'm assuming it won't be the laser units as the problem would involve two laser units. I'm running short of ideas so I'm hoping that someone on here has come across this problem before.

[JustManuals]

Re: Bizhub C353 grey and cyan background bands

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Paul@justmanuals.com

[MAD0RAM]

Re: Bizhub C353 grey and cyan background bands

The pattern looks a lot like a charge grid.
What is the percentage on the Cyan unit and if its low was it chipped previously?
I would try a new Cyan unit, I personally did not see any black in your sample.

[Imsdal]

[Darren King]

Re: Bizhub C353 grey and cyan background bands

I once had the transfer roller cause a similar problem. Have you tried a new transfer roller?
Darren

[wilbing]

Re: Bizhub C353 grey and cyan background bands

Thanks for your ideas. The example I attached does have grey and cyan on it but my scanner is obviously not very good, time to invest in a new one!, It does look like a control grid pattern so maybe the HV pcb or is the grid controlled by the mfp? Looks like this is going to be an expensive repair. I will try the transfer roller first.