300ci background on copies

[D_L_P]

I have a 300ci that has some purplish (magenta and some cyan) background throughout the whole page when copying but only in full color. B/W copies, B/W prints and color prints seem fine. 200k on the meter.
Drums and developer were replaced about 50k ago. I cleaned the optics/drum/developer/charge rollers. Firmware is 9.20.
I'm new to kyocera's and hoping there is something simple I missed.

[JustManuals]

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Paul@justmanuals.com

[jmaister]

This Parts & Service manual can now be purchased for $12.77 and downloaded immediately after payment from
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Paul@justmanuals.com

is this guy for real?

anyways, the background, is it overtoning?

What does the eventlog say about the last 50k?

[blackcat4866]

Yeah. Take a look at two things:

First, print U089 gray test patterns in each of the 4 colors to tell if your primary charge rollers are dirty. Patterns appear at 38mm intervals from the charge roller. Usually by the time you see the pattern, cleaning doesn't help, but try anyway.

Second, check simulation U131, automatic, to see if it's overtoning. Any values differing by 25 points or more from the reference, that developing unit need to be replaced. =^..^=

[spiderman76]

Se i valori della Sim 131 sono quelli dell'allegato , le DV sono tutte da sostituire ???SCAN0711_000.pdf

[kyocera.team]

Yeah. Take a look at two things:

First, print U089 gray test patterns in each of the 4 colors to tell if your primary charge rollers are dirty. Patterns appear at 38mm intervals from the charge roller. Usually by the time you see the pattern, cleaning doesn't help, but try anyway.

Second, check simulation U131, automatic, to see if it's overtoning. Any values differing by 25 points or more from the reference, that developing unit need to be replaced. =^..^=

agreed with Mr.black cat your problem in primary charge roller clean it

[jmaister]

can you kindly elaborate on why its the charger roller, or redirect to kconnect document? i understand the u131 part.

[D_L_P]

Thanks for the replies! I should be able to make it back tomorrow and hopefully have a solution. It's late but here is a sample. The scan came out bluish, but it actually has more magenta and looks purplish pink.


doc2011a.jpg

[jmaister]

Firmware update is one of thing that needs to be done.

[blackcat4866]

The pattern from a dirty primary charge will be fairly obvious on a U089, gray internal print, but is too subtle to be represented in a scan. Look for the 38mm repeat interval. That's the key. =^..^=

[Venom]

After cleaning charge roller, RUN U464 AC Calibration, Dev refresh, color calibration

[D_L_P]

Update -
It is definitely in the optics. Prints are fine. And copies look fine when I turn on the "background image density" adjustment under the image quality tab. The background is consistent and is everywhere except the edge voids. I really cleaned the optics and it is barely noticeable now. I will go back and do all the CCD adjustments in U412 once I get the test charts I need. I think another tech might have messed with the settings in U425. Every setting in U425 is the same as the 300ci next to it. Are those settings for Red/Green/Blue/Cyan/Magenta/yellow the same for all the 300ci's? Or are they set from the factory to that particular CCD?


http://www.copytechnet.com/forums/at...s-doc2011a.jpg

[blackcat4866]

Congratulations.

That's one of the major benefits to where I work. I always know exactly what the guy before me did. He is me. Is there a maintenance report that was printed during inital setup, or during a warranty claim? That's a good place to start. =^..^=