DC12 fade on edge (pic attached) need help, pls

[JimmyB]

xerox dc12 fade in all color on whole side on trial edge. look at pic (sorry for low quality pics ).
the fade is about 2-3 mm.

i think the problem is in IBT assy, but do not have another one to change and check.
any supposition? thanks


fade2..jpgfade1..jpg

[davidj7]

do a hard stop and see the image on the IBT assembly. If it has the same issue then you can be sure its with IBT.

I had a similar issue long time back. I did fix it but how i dont remember .

Do you have another DC12 nearby . you could just interchange IBT assy and confirm .

[xcopytech]

agree with davidj7, do a hard stop procedure to see image on drum and IBT.

Also check first IBT roll.

[JimmyB]

after hard stop image on IBT belt is faded ( the same as printed image).
i replaced IBT assy, 2 btr and drum from working machine, but the problem remain.
now, i will try with developer assy and ROS.

[davidj7]

whats the size of paper you are using. If you have a 12x18 try that and tell me how much print area has faded or shows a colour difference.Secondly is there a sudden drop of colour from a particular area or does it comes down slowly.

[JimmyB]

paper size is SRA3 (320x457mm) image size is 302x440 mm
the faded area is about 2-3 mm in IB side on whole lenght (440mm)
look at magnify pic: (the skew is from taken photo)



no color drop, the fade look like as missing toner. colors of the pic is 100% cyan and 100% magenta

[davidj7]

if you think a colour is missing print 100% c , m y k and check if any colour is missing

[xcopytech]

see attachment

[JimmyB]

if you think a colour is missing print 100% c , m y k and check if any colour is missing

when print 100% CMYK, all color missed and image fade is the same as one color print

xcopytech, about image size on SRA3 max image is 303x444 (look at bulletin: Expanded Image Area on the DC12 printer)

and on another dc12, on SRA3 paper, image size is exact 303x440 and on 12"x18" paper, image size is 298x450mm, on both sizes with no trouble of quality.



The DC12 Firmware version 11.50.3 enables an Expanded Image Area on to be printed on the printer.
The guaranteed imageable area is as follows:
- Print mode:
12 x 18" paper - 297mm (+2.0/-0.5mm) x 438 mm (+13.0/- 0.5mm)
SR A3 paper - 297mm (+6.0/-0.5mm) x 438 mm (+6.0/- 0.5mm)

[davidj7]

i think its problem with ros.

[kandod]

I have a similar problem with the image fading slightly the last few centimeters IB, and the effect was to a some degree removed after cleaning the Erase Lamp surface, although it is still far from perfect.

[JimmyB]

thanks for all mates.

after playing with Lead / Side Registration and ROS DELETION NVM, now fade disappear .......

xcopytech and davidj7, do you know anything about skew of image for DC12. how to correct skew?

[xcopytech]

how big is skew?

only way which I know is to adjust registration assy.

[davidj7]

is the skew present in all trays 1-4 or tray 5. and as xcoptech asked . how big is the skew

[GusG]

thanks for all mates.

after playing with Lead / Side Registration and ROS DELETION NVM, now fade disappear .......

xcopytech and davidj7, do you know anything about skew of image for DC12. how to correct skew?

Hi JimmyB, I've also got a fade much like yours and I'm curious to know how you played with Lead / Side Registration and ROS DELETION NVM? I've cleaned the Erase Lamp surface but that didn't do anything