C5045 lines on magenta dv unit

[mrfuser]

Happened suddenly. Any idea what causes these lines.?

image.jpg

[zoraldinho]

Re: C5045 lines on magenta dv unit

Any errors maybe?
-Developer counter?

-check distance between the rear side of machine and the wall: preferably 10cm or more.
-Upgrade Dcon to last version.
-Does the symptom solved by outputting 50 pages of solid magenta images?
-Check dust filters
-Gently shake developer assy.
-Replace developer.

[V-P]

Re: C5045 lines on magenta dv unit

I can replicate that issue if I hold the dev in my hand and rotate it manually BUT at a different angle.

Other than that I have never seen it happen on a machine.

Even if there is shortage of dev material in the toner - it would not cause stripes like that.

I would try to rotate manually at different angles and see what happens.

[Max]

Re: C5045 lines on magenta dv unit

If the dev unit is level then the copier lost some developer from the dev unit.I would say if you replace it with a new one and it only lasts a week or less then I would look at dev bias or perhaps dev unit drive mechanism ( rotating when its not supposed to) Had something similar on Ricoh and Konica. Ricoh had a stuck clutch and inconsistent dev bias on Konica.

[mrfuser]

Re: C5045 lines on magenta dv unit

Pulled dv unit again and rotated every angle with same result. Stripes won't go away. No errors showing and counter at 24%.
any other ideas?

If the dev unit is level then the copier lost some developer from the dev unit.I would say if you replace it with a new one and it only lasts a week or less then I would look at dev bias or perhaps dev unit drive mechanism ( rotating when its not supposed to) Had something similar on Ricoh and Konica. Ricoh had a stuck clutch and inconsistent dev bias on Konica.

[RAI]

Re: C5045 lines on magenta dv unit

I'm pretty sure in debri inside the unit. It can also be compacted toner in the way of the cleaning blade. Had one like this thought of opening it but it looked like a semi sealed unit. It's not wear on the unit, if it was you'd see a scratched mag roller.

[V-P]

Re: C5045 lines on magenta dv unit

Do the stripes move horizontally when you rotate manually or stay in the same place ?

[mrfuser]

Re: C5045 lines on magenta dv unit

Seem to stay same place

Do the stripes move horizontally when you rotate manually or stay in the same place ?

[canonbundy]

Re: C5045 lines on magenta dv unit

Seen it before - is it OEM Toner - hard lumps in Dev Unit? Replace with correct Toner- run skyshots (to deplete Hopper of old Toner) then replace Dev Unit. Then run Dev as a new install then full Autograd.

[mrfuser]

Re: C5045 lines on magenta dv unit

Yes oem oem toner. I will try that. Why run sky shots of going to replace dv unit anyway?

Seen it before - is it OEM Toner - hard lumps in Dev Unit? Replace with correct Toner- run skyshots (to deplete Hopper of old Toner) then replace Dev Unit. Then run Dev as a new install then full Autograd.

[mrfuser]

Re: C5045 lines on magenta dv unit

Replaced magenta dv unit now we get no magenta at all and dv unit looks fine, mag roller coated appropriately. Getting random e0020-0022 and E0020-0290 codes.

any help?

[Canon345]

Re: C5045 lines on magenta dv unit

Either the HVT1 UN16 FK2-7348-000 is causing a problem and you have an ITB coated in toner. A shorted wire would cause the laser to stay on and deplete the dev unit. e020-0023 wire harness FK2-7330-000.


I would go with a developing clutch. Let us know please.

[mrfuser]

Re: C5045 lines on magenta dv unit

Ok all fixed. When we installed the new DV unit it had shifted about 5 mm towards the rear (non op) side of the machine. Took a while to look carefully at all alignment, but when we discovered this and R&R the DV unit again while carefully comparing alignment to other DV Units it worked fine. This is a very poor design that won't throw any codes or any other indication other than you completely lose the color you are working with. Way to go Canon!

[Canon345]

Re: C5045 lines on magenta dv unit

Its the same for drum units. If they are not pushed all the way down you can lose color on the op side or rear side.