Xerox 560 white repeating lines in all colors

[Stelios Aristidis]

Hello, this is my first message at the forum.
I am the owner of a printshop in Greece and I have a Xerox 560.
I have a technical problem that i can't figure out.
The problem is the same repeating white lines in a distance of about 3cm in all colors.
I have changed Belt, Belt Blade, Drums, Developers and 2nd BTR.
Also jammed the printer and checked if the lines appear on the printout on the belt and they were there so any parts after belt are probably out of blame.
Also cleaned 1st BTR cylinders.
I don't know what else to do.
I would really appreciate any kind of help.
In order to have a better understanding I am uploading a magenta and cyan printouts, at 60% color.
Thank you very much in advance and I will be expecting for any kind of help or feedback.
Best regards,

Stelios

[borism25]

ROS window is probably dusty on magenta, that is why you have 2-3 line across long edge. Do you get also this bending on Yellow and Black? if you get it on all 4 colors, probably something on fuser presure belt, the distance on that error is around 94-95 repetition but, sometime if you have longer job you have the same error and few spots that are duplicate.

When you have change the Developers did you put old powder or a new one.

[adriansto]

I have a technical problem that i can't figure out.
The problem is the same repeating white lines in a distance of about 3cm in all colors.

What printer software version ? More accurate info about distance - 34 or 36 mm?

[Tecnico_Xerox]

Hello, this is my first message at the forum.
I am the owner of a printshop in Greece and I have a Xerox 560.
I have a technical problem that i can't figure out.
The problem is the same repeating white lines in a distance of about 3cm in all colors.
I have changed Belt, Belt Blade, Drums, Developers and 2nd BTR.
Also jammed the printer and checked if the lines appear on the printout on the belt and they were there so any parts after belt are probably out of blame.
Also cleaned 1st BTR cylinders.
I don't know what else to do.
I would really appreciate any kind of help.
In order to have a better understanding I am uploading a magenta and cyan printouts, at 60% color.
Thank you very much in advance and I will be expecting for any kind of help or feedback.
Best regards,

Stelios

Hello, It seems like a problem in the Development Units or in the cylinder units. Does it also happen to you in the Black color? I think it is necessary that you consult a technician specialized in the model... Since you changed most of the components that could cause the problem, now you have to check the motors and gears that move the cylinders and development units

[Stelios Aristidis]

ROS window is probably dusty on magenta, that is why you have 2-3 line across long edge. Do you get also this bending on Yellow and Black? if you get it on all 4 colors, probably something on fuser presure belt, the distance on that error is around 94-95 repetition but, sometime if you have longer job you have the same error and few spots that are duplicate.

When you have change the Developers did you put old powder or a new one.

I get the problem in all 4 colors. ROS windows are clean. I changed the developer powder also. What do you mean by fuser pressure belt?

[borism25]

I read one more time your first post, you have already on belt strikes so that is not error on the fuser.

[Stelios Aristidis]

What printer software version ? More accurate info about distance - 34 or 36 mm?

It's xerox color 560, sw version 55.40.61.
Distance between lines is 26mm and the thickness of lines is 12mm

[adriansto]

It's xerox color 560, sw version 55.40.61.
Distance between lines is 26mm and the thickness of lines is 12mm

Check nvm 751-088 to be = 27369. The lighter band can be from drum or from transfer on belt = the 4 BTRs.
So print A3, panic stop the machine and try to see if on drums is uniform image

[Stelios Aristidis]

Check nvm 751-088 to be = 27369. The lighter band can be from drum or from transfer on belt = the 4 BTRs.
So print A3, panic stop the machine and try to see if on drums is uniform image

Hi, nvm is 27369. Did the panic stop and the image on the belt is NOT uniform. Has the same defect as on paper.

[adriansto]

Hi, nvm is 27369. Did the panic stop and the image on the belt is NOT uniform. Has the same defect as on paper.

Not on the belt, on the drum= cylinder. Tried to localize defect before the image transfer on the belt or after.

[Stelios Aristidis]

Not on the belt, on the drum= cylinder. Tried to localize defect before the image transfer on the belt or after.

Did that. Nothing on drum. Also changed all drums just to be sure and problem remains

[adriansto]

Did that. Nothing on drum. Also changed all drums just to be sure and problem remains

I do not blame the drums. If the drive chain of the drums or High Voltage Power Supply ( HVPS) or HVPS = bias voltage for developer units are faulty, then the image developed on drums contain the defect. In this case the defect will transfer on belt as you already seen.
Or image on drums are ok and the defect is on HVPSs of the first BTRs ( inside the IBT ) Hard to belive all 4 HVPSs for BTRs are faulty. May be something common to all HVPSs. It is hard to catch image on drum but I think you understood the ideea.

[Stelios Aristidis]

I do not blame the drums. If the drive chain of the drums or High Voltage Power Supply ( HVPS) or HVPS = bias voltage for developer units are faulty, then the image developed on drums contain the defect. In this case the defect will transfer on belt as you already seen.
Or image on drums are ok and the defect is on HVPSs of the first BTRs ( inside the IBT ) Hard to belive all 4 HVPSs for BTRs are faulty. May be something common to all HVPSs. It is hard to catch image on drum but I think you understood the ideea.

Ok thank you, I got the idea.
I also believe that the 4 HVPSs for BTRs are not to blame. Just to be safe changed all 1st BTRs and changed the 1st btr hvps PWB. Also changed the rolls of the BTR Housing.
Tried to catch the image on the drums many times but without success.
Do you have any other idea on how to to proceed?
Thank you in advance

[adriansto]

Ok thank you, I got the idea.
I also believe that the 4 HVPSs for BTRs are not to blame. Just to be safe changed all 1st BTRs and changed the 1st btr hvps PWB. Also changed the rolls of the BTR Housing.
Tried to catch the image on the drums many times but without success.
Do you have any other idea on how to to proceed?
Thank you in advance

GP5 from service manual. But you need to make several attempts to find the required value.