White line

[YHEL23]

Good day to all,

Replaced Drum,Cleaning Blade.Charge roller, Transfer Belt.
Cleaned all optic and LD unit.
The Machine copy 200k any more idea on this, Please see the attach file
for more info.

Thanks in advance
Yhel

[Cipher]

A full coverage print with toner missing in a consistent ribbed pattern?

Check out the dev roller / doctor blade / unit.

[YHEL23]

A full coverage print with toner missing in a consistent ribbed pattern?

Check out the dev roller / doctor blade / unit.

I try to swap the PCU. I take the PCU to other machine. Still the same!!!

[Cipher]

What's the model?

[YHEL23]

What's the model?

Sorry... Its MP4000

Thanks Clipher

[Cipher]

I try to swap the PCU. I take the PCU to other machine. Still the same!!!

So you have tried a completely different PCDU or have you only tried the same PCDU in a different MP4000?

[YHEL23]

So you have tried a completely different PCDU or have you only tried the same PCDU in a different MP4000?

I installed the different PCDU to the machine that having white line still the same.

[Cipher]

Hmmm that's pretty weird then.

As that pattern on your sample print is a dead ringer for how the surface of the dev roller looks.
I can't think of any other roller that would produce / leave a mark such as that one.

[YHEL23]

Hmmm that's pretty weird then.

As that pattern on your sample print is definely a dead ringer for the surface of the dev roller.

That what i think also....But after i installed the different PDCU still the same.its possible LD unit can cause this problem???? I will try to replace the LD unit and i let you know.

thanks again clipher have a nice day.....
yhel

[Fearless V K]

Is the pattern on the internal test prints?

[YHEL23]

Is the pattern on the internal test prints?

Text copy can't see the white line, only if my client photocopy the dark background.that is sky shoot.

[Fearless V K]

Generate the internal test pattern with dark black bands (can't remember the name of it) and see if the problem is still there. At least that will isolate the optics. Also make sure the white plate is clean on the scanner.

[YHEL23]

Generate the internal test pattern with dark black bands (can't remember the name of it) and see if the problem is still there. At least that will isolate the optics. Also make sure the white plate is clean on the scanner.

I will try and let you know
Thanks friend,

[KopyKat]

Text copy can't see the white line, only if my client photocopy the dark background.that is sky shoot.

This may sound too simple....Are you saying that this ONLY shows up on sky shots? Or does it show up with the cover down and large solids? The reason I ask this is that you say it does not show on text. I have seen this Exact pattern on sky shots when there is a florescent lamp above the copier. I may be just talking out of my butt again.

[YHEL23]

This may sound too simple....Are you saying that this ONLY shows up on sky shots? Or does it show up with the cover down and large solids? The reason I ask this is that you say it does not show on text. I have seen this Exact pattern on sky shots when there is a florescent lamp above the copier. I may be just talking out of my butt again.

its show if photocopy a dark background and cover is down. I try to print from computer with a large solid its fine. So now i will focus to the optic section.Still doing the troubleshooting.....