Dark band on WC 56xx drums

[Piper]

Most Drum units ( xerographic modules ) for the WC 56xx family fail even before doing half their Life.
They give a dark band on prints. Has anyone had this experience and what should be done to make those drums last longer.

[Exok]

Re: Dark band on WC 56xx drums

I have not found this to be the case. In fact, I often get more than 100% life out of them. (at 50% life we replace the crum to reset them back to 100%). There are 2 different drums in this line. The low speed drums do not have an automatic charge cleaner so you have to use the cleaning tool located on the front of the drum to manually clean it. This clears up the wavy dark bands you get when charge is dirty. If you are getting these bands on the high speed drums that have automatic cleaning, you can go into service diagnostics, component control and run the drum cleaner forward and back a number of times. I even recall some of the older software levels having this feature in admin tools.

[Enzo]

Re: Dark band on WC 56xx drums

I have a 5645 and I never replaced the drum before its natural end. I have 113r672

[Tropix]

Re: Dark band on WC 56xx drums

check charge corotron and clean it

[Piper]

Re: Dark band on WC 56xx drums

The drums are 113R672 and this does not happen on one Machine. I have noticed it on almost 4 56xx series machines I service in my area. All of them have automatic cleaning.
I am now thinking that it could be altitude settings or climatic conditions. I am in a Tropical region.

[Enzo]

Re: Dark band on WC 56xx drums

Settings altitude ? The machine allows to set this option .

[xeroxsharp]

Re: Dark band on WC 56xx drums

Most Drum units ( xerographic modules ) for the WC 56xx family fail even before doing half their Life.
They give a dark band on prints. Has anyone had this experience and what should be done to make those drums last longer.

Did you check WTC. Does it fill with waste toner. ( mostly two toner bottles fill one WTC ).
I still have very similar issue in few X245 and X5745.
In my case WTC is not fill well with the wast toner. WHY - The xerographic modul does not transport all wast toner to the WTC and I need to vacuum xerographic modul every 30K. Because of that the life time of xerographic modul is less than 150K.
Sometimes only first duplex copy/print is defectiv before you can see toner dropping on paper.
I replaced main drive unit,and still get same problem.
I made some modifications around WTC door,but still not 100% OK

But I think that you need to do a very good cleaning around xerographic area,good cleaning of charge corotron and please open the copier on the back side and do a perfect cleaning around HVPS from time to time.
Hope this will help.
Regards

[bojans]

Re: Dark band on WC 56xx drums

In my area almost all of machines suffer from the same problem. After 100K black stripes.
I just to clean charge corotron, make new insulation of transfer corotron wires etc... but in the most cases its related to High Voltage PWB...
Anione knows whats's going wrong on these PWBs? And is there a fix?

[Piper]

Re: Dark band on WC 56xx drums

Did you check WTC. Does it fill with waste toner. ( mostly two toner bottles fill one WTC ).
I still have very similar issue in few X245 and X5745.
In my case WTC is not fill well with the wast toner. WHY - The xerographic modul does not transport all wast toner to the WTC and I need to vacuum xerographic modul every 30K. Because of that the life time of xerographic modul is less than 150K.
Sometimes only first duplex copy/print is defectiv before you can see toner dropping on paper.
I replaced main drive unit,and still get same problem.
I made some modifications around WTC door,but still not 100% OK

But I think that you need to do a very good cleaning around xerographic area,good cleaning of charge corotron and please open the copier on the back side and do a perfect cleaning around HVPS from time to time.
Hope this will help.
Regards

The WTC fills well with waste toner. When I do a good cleaning of the Xerographic module and back of machine, the prints are okay but
the black strips came back after about 2K. And its not on one machine but on several of them in my area. Then this doesn't happen on the WC 245,
WC 265, and WC 275 in my area.