Sharp MX-3501N - Streaking

[Tech2002]

I've got a MX-3501N that when I am making copies, it is streaking color on the back side of the page. I've checked the Fuser & Image Unit to start and see nothing out of sorts.

Anyone seen this before?

Thanks for the help.

Note: I actually think I got it - Web was not turning properly.

[ZOOTECH]

Did you check the fuser web cleaning unit, it might not be turning. Also, it is hard to see sometimes, but toner might be on Transfer belt 2.

[OMD-227]

Depends on what you mean by streaking on the back of the pages.....

Can be caused by Fuser pressure levers recently up, causing poor fusing & toner sticking to lower roller (contaminating back of pages), problem with primary transfer belt cleaning, causing excess toner to transfer to secondary belt (therefore contaminating back of pages), or a damaged fuser web, frame or drive gear assembly.

You mention this is happening on copies only. You havent said if it was on prints as well. As you have the 3501N with the DSPF unit, it is copying 2 sides at the same time, therefore, contamination of dust or other substance inside the DSPF scanner or mirror unit can also cause this (D/S copy only).

What color is the colored streaks on the back of page?

[Tech2002]

It was all the colors. I had changed the Web but I had not copied before changing the Web - I was only Printing, so I wasnt sure if it was a copy/print issue or just copy. I wasnt expecting an issue. I put the old Web back in (there was a little life left) and it copied and printed okay.

So I took everything apart and re-installed the new Web. It seems to be okay. I appreciated the other comments you made. I had checked the Image Unit - I know they can be an issue.

For the time and cost of material, it almost makes more sense to buy a new Fuser then to rebuild the old one. What do you think?

[OMD-227]

Nah mate, I can strip a MX3500/4500 fuser unit & rebuild fully within 20 minutes. Theres no need to change the sub-heater roller unit (unless its stuffed), just the upper, lower rollers & web unit. Too easy. I easily do 5 or more per week.

Unless you could easily see a fault on the web frame, there is no explanation for your issue. If the web wasn't contacting the upper roller then it can lead to non-cleaning which would do that, but your web would be spotless & clean. If the used web is dirty, then it has been in contact with the upper roller and there would be another explanation, such as belt unit or recent pressure levers up.

[Dark Helmet]

Our company changes the web once at 150k. Ive always changed the sub heat roller but mine always seems harder to turn and scored a little bit. Even then it's not a hard job to do. At 300k we put in a entire fuser that comes complete with web. It's cheaper than buying the heat roller kit AND another web. This does not include labor.

[Tech2002]

Thanks for the input - always appreciated.

Question: I had a post about an MX-2700N that had no prints or copies when copying - the suggestion was to change the Main Drive - Is there a noise when the Drive is ready to go or need of repalcement?

I now have a MX-3501N that makes a laboring noise - back of machine - lower left. I have not pulled the panel to take a closer look, but my thought was that it may need changing. Any thoughts?

Also, wassa you said that you change the Upper Heat Roller on the Fuser (MX-Series). But if you don't change the Lower Heat Roller at the same time - according to the Bulletin on the Fuser, that the same issue would/could occur. Have you changed both Heat Rollers as the Bulletin suggests or just the Upper?

[NeoMatrix]

[Streaking fault]
This train of thought may appear some what strange to you for now :
Can you swap the yellow and the black drum units over and tell me if the streaking changes or goes away.
Just do a black test copy only for this test....

[Labouring noise]
Might be a dev tank binding up. Probably the Black dev tank.

[Labouring noise]
There is also a drive shaft and cam that connects and drives the ITB. This shaft becomes so warn the 'E'-clip can pop off the end of the shaft. This is big job to replace the shaft an arbor. There is a mod bulletin out about this fault.


[Another Fault ]
We also have had fuser units move from the fault machine to another good machine and the problem has moved to the good machine. The fault-fuser unit was completely rebuilt and the problem still persisted on the good machine.

HTH
GDM

[OMD-227]

Thanks for the input - always appreciated.

Question: I had a post about an MX-2700N that had no prints or copies when copying - the suggestion was to change the Main Drive - Is there a noise when the Drive is ready to go or need of repalcement?

I now have a MX-3501N that makes a laboring noise - back of machine - lower left. I have not pulled the panel to take a closer look, but my thought was that it may need changing. Any thoughts?

Also, wassa you said that you change the Upper Heat Roller on the Fuser (MX-Series). But if you don't change the Lower Heat Roller at the same time - according to the Bulletin on the Fuser, that the same issue would/could occur. Have you changed both Heat Rollers as the Bulletin suggests or just the Upper?

I cant remember where I have said to only change the upper roller. I never do that myself either. Fuser rollers (upper & lower) must be replaced together. When there was a new upper & lower heat rollers for the C-Jupiter (mods) made about 2 years ago, they were actually made in different diameters to the original version, so if both were not replaced together as a set, you would get alot of jamming.

My post above on this issue states that I dont replace the sub-heater roller. That is the unit that comes with the web unit. Most of the time it can be cleaned up and used again. If it is in good condition it doesnt hurt at all just to leave it alone and just replace the upper & lower rollers (along with the web unit).

The labouring noise could be anything from main drive unit, devs, fuser unit or paper feed drive unit. The only ways to tell are to either run them in sim or take off back cover and have a good look. If it was the main drive unit you'd mainly get other problems like L4-06 or missing colors (as mentioned in detail on your other post).