[CQ] C454e Background problem

[Konicatech]

Hi,

Have got a bizhub c454, that has started to leave a background image on prints

for example, I print the demo page, and then if i print something else it will have the demo page sqaures in the background - see image attached - sorry for the quality.

The machine has about 500,000 clicks, and drums are all new, colour devs have 45% left, black dev has 90%, all other parts are well within life.

Tried stabilization, rotating the drums, but no difference

Any one seen this before?background.jpg

[mo0651]

Re: C454e Background problem

We have had bad dev units. replace drum and dev unit at same time.

[habik]

Re: C454e Background problem

Check fuser. IT should have remaining image on upper fuser roller.



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[Konicatech]

Re: C454e Background problem

Check fuser. IT should have remaining image on upper fuser roller.



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Have tried another fuser and still the same

[habik]

Re: C454e Background problem

Have the belt been replaced? If it has have you run Initialise+Image Background Reset?

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[Konicatech]

Re: C454e Background problem

Have the belt been replaced? If it has have you run Initialise+Image Background Reset?

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The belt was swapped for testing purposes but there was no difference, if you mean Initialise & image stabilization then yes these were run

[habik]

Re: C454e Background problem

Does it offset as well when you do PS or PCL print outs?? Just to eliminate CMY units.

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[Konicatech]

Re: C454e Background problem

Does it offset as well when you do PS or PCL print outs?? Just to eliminate CMY units.

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Good question! I have not tried this, but will! - When i do gradiations for CMY, there is like a dusting of all colours over the test prints (not just a specific colour) for example, magenta has a dusting of yellow,cyan

[Synthohol]

Re: C454e Background problem

OEM toner or dirt in a bottle?

i dont think your transfer belt is getting cleaned by the blade. run some solid test patternsand pull the belt and rotate by hand to see if the cleaning blade is doing its job.

[habik]

Re: C454e Background problem

OEM toner or dirt in a bottle?

i dont think your transfer belt is getting cleaned by the blade. run some solid test patternsand pull the belt and rotate by hand to see if the cleaning blade is doing its job.

Think belt and fuser has been tested from other machine as per posts above.


I just hope test prints are done on 80gsm.

Maybe running a lot of halftones and get newer toner through the Devs.

But first I'd go with K (1 PC) only to narrow it down and eliminate TX and F. Once it's doing on K only I'd go for half stop there and see where the culprit occurred.


Just out of curiosity is your background on some whacky numbers like -5 or such other than 0? TCR levels OK? Anything unusual on Table Vdc or Vg?

Also reseating all boards connections and specially DIMMs can occasionally help.




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[blackcat4866]

Re: C454e Background problem

Something isn't cleaning properly, that's for sure. Either primary transfer or fuser. The drum is too small to make that interval. Are you using OEM parts? OEM toner? Plain paper with appropriate media type settings? =^..^=

[wjurls]

Re: C454e Background problem

Looks like transfer belt cleaning to me. Make sure the elbow that runs the waste toner from the belt to the waste tank isn't blocked. Also as mentioned above, media settings on KM color machines is absolutely paramount!!

Lee

[JR2ALTA]

Re: C454e Background problem

How is it not fuser/ fusing issue? All colors ghosting? That's day one troubleshooting.
Transfer not cleaning results in streaks or, at best, long distant shadowing

[wjurls]

Re: C454e Background problem

He had said he tried a different fuser. Also image from previous page ghosts onto next. just about the distance of the transfer belt. Poor transfer cleaning can also repeat all colors.

[wjurls]

Re: C454e Background problem

I've had a C454 do this very thing and the tube leading from the belt cleaner to the waste tank was clogged.