Bizhub C454, Cyan background/ghosting

[Desert Rat]

Re: Bizhub C454, Cyan background/ghosting

I agree with copier tech, set it up with oem toner and fresh developer. Aftermarket products can work well
but if a bad batch gets out, it can be very confusing.
Many times my assumptions have led me down the wrong path.

DR

[habik]

Re: Bizhub C454, Cyan background/ghosting

Poster is using compatible toner, I would always suspect that first before looking at a hardware issue.

Good point, assumed he'd go with that after vacuuming the hopper as suggested above. Let's wait and see.

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[Zesti]

Re: Bizhub C454, Cyan background/ghosting

I agree with Habik and other guys suggestions. I can see bad cyan DV unit and the ghosting mostly related to HV. Also check the PH unit and it's connection with relay board.

[habik]

Re: Bizhub C454, Cyan background/ghosting

Something else occurred to me regards to ghosting. Is the erase led strip lighting up for cyan?

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[D Colour]

Re: Bizhub C454, Cyan background/ghosting

Just an update.....

Had another tech look at the machine, they replaced the transfer belt and roller. This made no difference until they adjusted the Cyan image background voltage (set from 0 to +3) and this seems to have fixed it for now. This was a week ago.

Voltage -5
Voltage -5.jpg

Voltage 0
Voltage 0.jpg

Voltage +3
Voltage +3.jpg

Voltage +5
Voltage +5.jpg

The transfer belt was over life (2 times nearly). I wonder if it was somehow screwing with the voltages. I've seen a bulletin about units past their life giving issues to other components.

Hopefully this is resolved.

Edit - Heres the bulletin. thanks to copier tech for previously posting this.
Failure of Image Unit or Developer Unit.pdf

[habik]

Re: Bizhub C454, Cyan background/ghosting

So it was background as suggested.
Glad you worked it out. Good job.


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[D Colour]

Re: Bizhub C454, Cyan background/ghosting

So it was background as suggested.
Glad you worked it out. Good job.

Yeah, glad you suggested it, or else we could have been tearing hair out!

Thanks to everyone that contributed. Hopefully that's it fixed.

[allan]

Re: Bizhub C454, Cyan background/ghosting

The background adjustment can squeeze the last drops of life out of the drums. Does anyone no if it will go back to zero if a new drum is installed?

[Zesti]

Re: Bizhub C454, Cyan background/ghosting

The background adjustment can squeeze the last drops of life out of the drums. Does anyone no if it will go back to zero if a new drum is installed?

You're right Allan. If it was new IU the life counter should be zero itself. If only drum changed, machine is assuming the same drum and will keep adjusting it's voltages etc according to it's running and time.

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[Drake]

Konica Minolta 454 print a black background

[Synthohol]

why necromance a 7 year old thread? you are allowed to make your own ya know.
plus your issue looks nothing like the OP.
best if you start your own thread.
but since im here, IMHO that drum is crap. get a new one