[CQ] Docucolor 252 yellow streak

[fatfingers73]

Anyone come across this before?

Tried swapping drums and dev tanks but still getting thick yellow band across top of copies/prints.

Machine has recently been relocated and was fine before the move.

The yellow band is on the rear of the transfer belt when I pull it out.

Cleaned all ros windows.

Any advice would be appreciated.

Thanks.

[fatfingers73]

Re: Docucolor 252 yellow streak

Anyone?

Need some ideas before I return.

Thanks.

[bojans]

Re: Docucolor 252 yellow streak

I had something like that with cyan and it was ROS.

[fatfingers73]

Re: Docucolor 252 yellow streak

Hi, thanks for the reply. Wouldn't a dirty ros window just cause blank lines in prints?

The machine was recently moved 500 miles with toners left in.

I gave the ros windows a quick wipe, I didn't spend too much time on them because I didn't think it could cause the wide yellow band.

Cheers.

I had something like that with cyan and it was ROS.

[bojans]

Re: Docucolor 252 yellow streak

I didn't mean it was dirty, But it was faulty . Try replacing ROS assy.

[fatfingers73]

I didn't mean it was dirty, But it was faulty . Try replacing ROS assy.

[bojans]

Re: Docucolor 252 yellow streak

There are two ROS units, one with K and C, and other with Y and M.
I'm not sure if you could interchange those two units just to be sure if there is a problem.
It's not too complicated to reach ROS, follow the documentation. But those flat cables could be pain in the ass sometimes.

[fatfingers73]

Re: Docucolor 252 yellow streak

Oh OK thanks. They're different part numbers so probably can't be swapped.

Thanks for your help.

There are two ROS units, one with K and C, and other with Y and M.
I'm not sure if you could interchange those two units just to be sure if there is a problem.
It's not too complicated to reach ROS, follow the documentation. But those flat cables could be pain in the ass sometimes.

[bojans]

Re: Docucolor 252 yellow streak

You're welcome

[adriansto]

Re: Docucolor 252 yellow streak

You can cover the ros window with black paper strip and see if the band appear again.
I will look at the position of yellow drum and yellow dev. assy

[fatfingers73]

Re: Docucolor 252 yellow streak

Thanks for the advice.

Yellow drum and dev looked good.

Client has ordered new ros assembly. What's the easiest way to ensure it is the ros before I open the new unit?

Kind regards.

You can cover the ros window with black paper strip and see if the band appear again.
I will look at the position of yellow drum and yellow dev. assy

[adriansto]

Re: Docucolor 252 yellow streak

Thanks for the advice.

Yellow drum and dev looked good.

Client has ordered new ros assembly. What's the easiest way to ensure it is the ros before I open the new unit?

Kind regards.

As I said, cover the yellow ros window and do same print test. If the Y band is still on the paper the ros unit is good. If theY band disappear then may be the ros unit is defective. Print from service menu yellow print tests at 10%, 20%, 30%, 50% coverage. If all the test prints are uniform then again the ros is good

[WIWA]

Re: Docucolor 252 yellow streak

You can cover the ros window with black paper strip and see if the band appear again.
I will look at the position of yellow drum and yellow dev. assy

hey its looks like bad drum ,just try another drum ,switch cyan or magenta if their good . or maybe a lose internal lens inside ros assy.


Hope this help


Wiwa 72

Gonzos build v 1.0

[fatfingers73]

Re: Docucolor 252 yellow streak

Thanks, already tried switching drums.

Going back tonight to fit new ros assembly. Will update thread later.

Cheers.

hey its looks like bad drum ,just try another drum ,switch cyan or magenta if their good . or maybe a lose internal lens inside ros assy.


Hope this help


Wiwa 72

Gonzos build v 1.0

[fatfingers73]

Re: Docucolor 252 yellow streak

Update:

Fitted new yellow ros and everything looked good for around 50 copies/prints.

Then yellow band started to return, it now comes and goes!

It's driving me mad! Any advice would be great

When the fault is there yellow is missing from the print apart from the 1-2 inch band at the top of the sheet. It's like it's squashing all the yellow to the top of the sheet.

I've never had this before on any brand of machine.

Less importantly there are three little marks on each copy/print around 19cm apart. They're there on colour, mono and single colour (always black marks). They're not coming from drums or transfer belt?

Ideas please? Thank you.