konica minolta c450 image problem

[jokacross]

I have an image problem that I cant figure what it is. I already change the IU's, Fusing Unit, Image transfer Belt and the problem stays equal. This problem is just on the cyan and magenta colors. I put next some images of this problem on the color imagens.The first is halftone at 60 magenta (note the lines that are in the test pattern, the background is the oder side of the page) The second image is halftone at 60 blue(here the sames lines)the third is a copy (here the same lines)and the last on is the original of the copyI think that I have all the info but if something is missing please tell me thanks a lot

[tbkarthic]

Re: konica minolta c450 image problem

check the magnetic roller in developing unit and we may know feeding of the orientation of media.(landscape or portrait).

thanks.

[Dickie]

Re: konica minolta c450 image problem

Looks to me that you have a residual image of the gradation pattern showing in the background.

Did you run gradations just before you printed these tests ?

If so I would be checking the earthing to transfer belt.

If not then you would appear to have a very strange problem in so much as the machine is producing a weak image of the gradation pattern in the background at the same time as it is copying

[jokacross]

Re: konica minolta c450 image problem

Looks to me that you have a residual image of the gradation pattern showing in the background.Did you run gradations just before you printed these tests ?If so I would be checking the earthing to transfer belt.If not then you would appear to have a very strange problem in so much as the machine is producing a weak image of the gradation pattern in the background at the same time as it is copying

Its not a residual image that is on the other side of the page. and dont forget that this prob is just on cyan and magenta colors the yellow and black are printing fine

[jokacross]

Re: konica minolta c450 image problem

check the magnetic roller in developing unit and we may know feeding of the orientation of media.(landscape or portrait).thanks.

dont forget that this units are new, the blue and magenta units. But can you explain me better what you want say with feeding orientation? thanks

[Darren King]

Re: konica minolta c450 image problem

"dont forget that this units are new, the blue and magenta units. But can you explain me better what you want say with feeding orientation? thanks"


I think he wants to know where the lead and trail edge are.
Darren

[blaze2000]

Re: konica minolta c450 image problem

I suspect HV1 is bad.

[jokacross]

Re: konica minolta c450 image problem

I suspect HV1 is bad.

and you think that changing this will solve the problem? More ideas about this problem guys? thanks a lot

[blaze2000]

Re: konica minolta c450 image problem

and you think that changing this will solve the problem? More ideas about this problem guys? thanks a lot

Yeah man.... thats why i posted the comment.

[jokacross]

Re: konica minolta c450 image problem

Yeah man.... thats why i posted the comment.

ok im going to search where to get this part and gona try.


but some other thoughts about this problem guys? thanks a lot

[tbkarthic]

Re: konica minolta c450 image problem

dont forget that this units are new, the blue and magenta units. But can you explain me better what you want say with feeding orientation? thanks

it's are new? ok friend check imaging unit magnetic roller charging connection maybe it not give proper supply voltage for magnet roller

[jokacross]

Re: konica minolta c450 image problem

it's are new? ok friend check imaging unit magnetic roller charging connection maybe it not give proper supply voltage for magnet roller

and that can happen to a single unit or to the all units?

[tbkarthic]

Re: konica minolta c450 image problem

and that can happen to a single unit or to the all units?

single units.

[tbkarthic]

Re: konica minolta c450 image problem

and that can happen to a single unit or to the all units?

single unit.

[dickierock]

Re: konica minolta c450 image problem

Problem is only on cyan + magenta internal printouts from machine.correct?
Black and yellows are good so this rules out transfer roller and transfer belt.
You have replaced the image units and transfer belt.
Check image unit connections/hv connections for these units.
If these are ok,which is likely, then hv board should be swapped out as the next step.
Also might be no harm to upgrade firmware to rule out any ghosts in the machine
Best of luck.