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]

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

[habik]

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



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[Konicatech]

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



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Have tried another fuser and still the same

[habik]

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

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[Konicatech]

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]

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

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[Konicatech]

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]

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]

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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