Xerox 7855 making streaks on page

[Samanator]

I was told to go out to look at this Xerox 7855 (not my choice as we don't sell Xerox). I have never seen a 7855 and I don't have a manual. I was told by the customer (owner of the company) that all the drums were replaced about 8 months ago.

The streaks seem to go away (sorta) after 6 to 10 prints/copies. I looks to me like a transfer belt problem. I have included a couple of samples if what I found. The total count on the machine said 84,286; 26,886 black; 47,400 color.

I also discovered that the cyan drum seems to be stuck. All the other drums remove easily, but not the one in the cyan slot. I didn't want at this time to yank on stuff and possibly brake something without additional information about this machine. I took out and examined the fuser and both roller seem to be fine. The machine didn't seem to make any unusual noises while operating. It does have a finisher.

What could this problem with the copy quality be? Is the problem with the transfer belt not cleaning? Or is it a drum problem? Is it unusual for one of the drum units to get stuck?

Any help with this machine would be nice.

[adriansto]

Re: Xerox 7855 making streaks on page

Start with check the belt cleanner assy. Also good ideea to clean all belt assemblie. And very useful service manual. Probably it exist in pdf format not only in edoc format.

[Samanator]

Re: Xerox 7855 making streaks on page

Thanks you. I didn't know the belt cleaning assy was a separate thing.

I have request a service manual.

[Copier Addict]

Re: Xerox 7855 making streaks on page

You didn't mention the colour of the streaks.
The drums for this series are very poor quality so I would suspect drums first, even if they were replaced recently. I have had a few where a drum gets stuck and sometimes yanking on it releases and other times I have had to take the front off to get them out. Definitely get a manual.
Good luck

[shinchan]

Re: Xerox 7855 making streaks on page

I was told to go out to look at this Xerox 7855 (not my choice as we don't sell Xerox). I have never seen a 7855 and I don't have a manual. I was told by the customer (owner of the company) that all the drums were replaced about 8 months ago.

The streaks seem to go away (sorta) after 6 to 10 prints/copies. I looks to me like a transfer belt problem. I have included a couple of samples if what I found. The total count on the machine said 84,286; 26,886 black; 47,400 color.

I also discovered that the cyan drum seems to be stuck. All the other drums remove easily, but not the one in the cyan slot. I didn't want at this time to yank on stuff and possibly brake something without additional information about this machine. I took out and examined the fuser and both roller seem to be fine. The machine didn't seem to make any unusual noises while operating. It does have a finisher.

What could this problem with the copy quality be? Is the problem with the transfer belt not cleaning? Or is it a drum problem? Is it unusual for one of the drum units to get stuck?

Any help with this machine would be nice.

looks like transfer belt cleaning blade need to be replaced.... You got cyan, magenta, black streak in one line.... thats the transfer belt area not cleaning in my opinion

[Detonation]

Re: Xerox 7855 making streaks on page

Like others mentioned belt cleaner assembly. They are super cheap (at least in my neck of the woods).