KM-5050 Tractor Marks

[mrfuser]

Got a 5050 suddenly leaving light tractor marks on copies. Looks to be coming from DV roller. Is it the magnet in the roller broken?

Also, can I swap the DV unit with one from a 3035?

Thanks!

Kelly

[dragonman]

The dev tanks can be swapped between models. Do you have any samples?

[NeoMatrix]

Clean the type of "water mark" off dev roller with a clean dry plastic scour pad . The same as you do the dishes. If that is not the problem clean the Corona grid with metho and scour pad. Not 100% sure on that KM 5050
HTH
GDM

[Jimbo1]

I would not advise trying to clean the corona grid with anything but canned air. We have had several just go out when you try and do that.
I would also look toward the transfer roller.

[NeoMatrix]

Its fine . I have cleaned Corona Grids many times with metho and a scour pad. Works like a dream.
Be sensible and follow the angle of the grid and only work one direction away from your hand that is holding the grid on a clean peice of paper. Don't scub to hard that you bend the grid. Use common sense and you will boost your grey images back to
nice and black with full density.... Be care how you remove the grid off the corona frame. That techique is a learned artform....

HTH
GDM

I would not advise trying to clean the corona grid with anything but canned air. We have had several just go out when you try and do that.
I would also look toward the transfer roller.

[mlr1968]

Cleaning KM5050 corna wires.

As far as cleaning the KM5050 corna wires and Grids, I personaly have never attempted to remove the grid, but it you can then go for it! I clean the 5050 corna wires and grid wires with a q-tip with either denatured alcohol or water. It takes maybe 5 minutes to clean it and usualy produces good results. Just be prepared it will take about 5 or 6 q-tips.
Oh, forgive me this is my first post Hello to all!

[Venom]

Always use water to clean corona wires and grids...use your fingers to dry the grid. Blow out housing with canned air. We must have 200+ dev units left over from pm kits...I haven't seen a bad one on a 5050

[pjdbm]

I agree with venom, my typical cleaning is: Blow out the corona unit,clean it with water then follow up with denatured alcohol .

I have seen dev units mag roller get contaminated and I vacuum out unit followed by cleaning mag roller with scotbrite pad and finished with another vacuum .

[SwampYankee]

I'd tend to agree with Neo's inital assessment. Look at the mag roller, and if it looks like it has lines on it, either clean it with the scour pad or (my personal choice) an emery pad.

[NeoMatrix]

Have you cleaned the transfer roller with too much water ?
If you clean the transfer rollers on the smaller FS Printers you will get a blurred image along with similar tractor marks down the page. Never use too much water to clean the transfer rollers. Only a slightly damp cloth. Go over the transfer-roller twice if you have too. If you use to much water run about 50 copies through the machine to jettison the water out of the roller, and the copies will come good in no time.

GDM

[jockey]

Has anyone come up with a solution to the problem that mrfuser described? I have had the "tractor track" problem on several machines in the last 10 months usually just wipping the mag roller off will make the problem go away but I want to find out what the actual cause is. I use to have this same problems on the FS-3800 printers a few years ago at that time tech support said it was caused by moisture getting into the dev unit causing the developer to clump and stick to the mag roller. What happens is the developer will clump up on one end or sometime all the way across the mag roller causing the tractor like tracks, you can see it clearly on the mag roller, wipping it off will usually take care of the problem. I have one machine where I have wiped it off several times, two weeks ago I replaced the dev unit and now the problem has returned, has anyone else had this problem and figured out what is causing this?

[blackcat4866]

On Canons we called it "mottling". Aftermarket toner can contribute to the problem, but I've come to the conclusion that this machine does tend to mottle more than many others. Other factors include high environmental humidity. Changing the developing unit may help, but no guarantees. =^..^=

[manoj1686]

Try to replace the toner what u using....are you using the genuine toner or sub standard..b4 replacing toner clean and blow the toner inside the dev unit.

[DWise]

On Canons we called it "mottling". Aftermarket toner can contribute to the problem, but I've come to the conclusion that this machine does tend to mottle more than many others. Other factors include high environmental humidity. Changing the developing unit may help, but no guarantees. =^..^=

We've seen this problem a lot, and 99% of the time the customer is using generic toner...

You can wipe the roller but the problem will return... We've vacuumed all of the generic toner out of the developer before and added OEM and this has cleared the problem also... Good luck

[jockey]

Ok thanks guys, this customer is using generic toner, will switch to OEM and vacuum dev unit and see what happens