c6500 print quality

[rs4u]

Ok I have check the Transfer Unit, I have even gone and replaced the Blue Dev Unit on the machine. I am printed double sided on a 12.5x19 sheet, but I keep having blue streaks on the paper. If anyone can suggest something I havent done which is the following:

Complete 200k PM
All new drums
New Cyan Dev Unit
New Developer
Ran all the steps after doing so from Service Manual
Replaced Transfer Unit Rollers
New Cleaning Unit for Transfer Unit
Cleaned out the Pipes in the back of the machine
New Coronas
Cleaned the ADU deck top to bottom 4 times now

As you can see I am extremely lost on what to do to remove the blue lines.

Thanks

[texchar555]

if its doing all the color than it has to be tr belt or 2nd transfer roller. Make sure the 2nd tr roller in evenly lined up with the ramp leading to the fuser. I had the same thing happer to me the springs that press up against the roller was out of position. Check to see if the density is the same on both sides of the tr belt when you stop the machine at the 2nd tr roller. good luck

[udamanatclines]

I would like to see another sample of a test pattern #53 of all four colors.
Also how many total copies are on the machine?
I have attached a guide to help.

[udamanatclines]

Just email me at jason@clinesbe.com

[Stirton.M]

As you can see I am extremely lost on what to do to remove the blue lines.

Thanks

Out of curiosity.

There is supposed to be a black mylar on a guide just before the lower second transfer roller. This mylar I found out one day, is important. In my case, the mylar was damaged and had a high spot that literally rubbed against the transfer belt just before 2nd transfer, causing an intermittent smudge. It took a bit to eventually discover this was the problem for that line. Thinking nothing of it, I peeled this mylar off. I could replace it later, not believing it was really all that important. It was important. I encountered something similar to what you are seeing here.

Check to make sure this mylar is there...

See attached. Part number 14, attached to number 11.

part number is A03U 5239 00 HOLDING SHEET

[rs4u]

here is another example of what we are dealing with..

[Stirton.M]

here is another example of what we are dealing with..

Uh...what sample?

[TonerMonkey]

Uh...what sample?

Getting blank prints now by the look of things ...........

[rs4u]

sorry dont know why it didnt upload the file but here is another example..

if you notice you will see redish, yellow lines in the copy.

[Gerry.Fitz]

Hi ya
Wrong corona units
Gerry