View Full Version : White bands in 65oo
levino
08-03-2009, 06:14 PM
In 6500 white bands appearing on all colors on test pattern,parallel to paper path.not same for all colors but 1" difference is there between the bands
jma676
08-05-2009, 02:48 AM
I Didnīt understand, Bands in Mainscan Direction or Subscan Direction?. Send a Test Pattern Image. Ok in Subscan Direction, Check Development Unit, Dust Proft Filter And Transfer Belt when Bands is the same for all Colors. In Mainscan Direction check the Second Transfer.
brian155
08-06-2009, 02:31 PM
possible dev unit failure lower the density for test print to about 100 and on test pattern 1 do a print for each colour seperately to find true nature of problem this will best pick up any failure in individual colours.
start with cleaning charge coronas and grids
Chromatik
08-29-2010, 07:41 PM
I Didnīt understand, Bands in Mainscan Direction or Subscan Direction?. Send a Test Pattern Image. Ok in Subscan Direction, Check Development Unit, Dust Proft Filter And Transfer Belt when Bands is the same for all Colors. In Mainscan Direction check the Second Transfer.
Great Summary, brief
jma676
08-29-2010, 09:56 PM
this post is really old!!!!!!!!!
Chromatik
08-31-2010, 04:46 PM
I still think the same !!!!!
sbillis
09-01-2010, 09:49 PM
start with cleaning charge coronas and grids
wich is the better way to clean the grids and charge wire?
can you use the grids from C500,8050? or from 6501?
mrwho
09-01-2010, 11:10 PM
wich is the better way to clean the grids and charge wire?
can you use the grids from C500,8050? or from 6501?
To me, the grids from the C500/8050 are far better than the original ones from the C6500 - I don't know if they are still the same or if KM changed them already, since I stopped servicing these machines a while ago.
So, if things are the same, the coronas from the C500/8050 (gold-colored) are better than the C6500 ones (silver-colored).
Stirton.M
09-02-2010, 06:33 PM
To me, the grids from the C500/8050 are far better than the original ones from the C6500 - I don't know if they are still the same or if KM changed them already, since I stopped servicing these machines a while ago.
So, if things are the same, the coronas from the C500/8050 (gold-colored) are better than the C6500 ones (silver-colored).
I agree. They seem to stand up better over time, and sometimes can go beyond the life period on the 6500s. The grids can be ordered still.
jma676
09-02-2010, 06:53 PM
I agree. They seem to stand up better over time, and sometimes can go beyond the life period on the 6500s. The grids can be ordered still.
More resistance, but you must clean them for reuse, get your accounts, both work the same, should clean or replace at the same time.
sbillis
09-02-2010, 07:32 PM
To me, the grids from the C500/8050 are far better than the original ones from the C6500 - I don't know if they are still the same or if KM changed them already, since I stopped servicing these machines a while ago.
So, if things are the same, the coronas from the C500/8050 (gold-colored) are better than the C6500 ones (silver-colored).
Ok, gold plated grids from 8050 can offer less stripes. I will see the cost.
What about silver grids from 6500/6501. Wich is the better way to clean them? Can you use a corona from 6500 to 6501 and vice versa? What are the different?
jma676
09-02-2010, 07:38 PM
Ok, gold plated grids from 8050 can offer less stripes. I will see the cost.
What about silver grids from 6500/6501. Wich is the better way to clean them? Can you use a corona from 6500 to 6501 and vice versa? What are the different?
More resistance, but you must clean them for reuse, get your accounts, both work the same, should clean or replace at the same time.
Wich is the better way to clean them? consult Katun system or be careful not to damage.
Featured as a deteriorating.
mrwho
09-02-2010, 11:09 PM
Yep, that's the problem with them silver-colored grids - even before they reach half of their estimated life.
I've heard that the C500 grids offer less image quality, but I never noticed any difference neither did any of my customers at the time, so I think it's bs.
I'm surprised that KM still keeps those crappy grids on their inventory list!
Chromatik
09-03-2010, 10:47 AM
Many see so!!!!!!!!
jma676
09-03-2010, 11:06 AM
and I, my friend
To me, the grids from the C500/8050 are far better than the original ones from the C6500 - I don't know if they are still the same or if KM changed them already, since I stopped servicing these machines a while ago.
So, if things are the same, the coronas from the C500/8050 (gold-colored) are better than the C6500 ones (silver-colored).
Ya the C6500 age badly. The C500 don't seem to rust away.
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