xerox 252 not printing cyan anymore

[adriansto]

Re: xerox 252 not printing cyan anymore

[ATTACH=CONFIG]28836[/ATTACH]
Here is a picture to show the rough/sand like cyan print over the sheet. Despite the fact that the printed image is missing cyan. Sometimes the prints are clean but cyan is always missing.
You dont think there is something else much simpler to think of that could be causing this. Before that we start looking into electronic boards?

Your tech must know when there is not voltage on drum or this voltage is low the image looks like you posted here. The used name for this is background.
But if the paper is rough / sand like that mean the developer is on the paper and this should not happen even there are low voltage on cyan drum.
The developer unit and drums act as a unit so you need to check also bias voltage.
Something is wrong if the developer gets on paper.
Easier at make checkings I dont know.

[InterfaceP]

Re: xerox 252 not printing cyan anymore

Unfortunately there is no magic switch hiding in the machine. I suggest you preform the procedure:

Originally Posted by adriansto You need to check voltages on HVPS Developer Bias Pwb = item no. 16
Measure the bias voltage, on electronic board, for all three colours and compare.
If you have voltages there then you can change the item no 15 = Charge HVPS.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

image.jpg

You need to check voltages on HVPS Developer Bias Pwb = item no. 16
Measure the bias voltage, on electronic board, for all three colours and compare.
If you have voltages there then you can change the item no 15 = Charge HVPS.

Here is a picture to show the rough/sand like cyan print over the sheet. Despite the fact that the printed image is missing cyan. Sometimes the prints are clean but cyan is always missing.
You dont think there is something else much simpler to think of that could be causing this. Before that we start looking into electronic boards?

[adriansto]

Re: xerox 252 not printing cyan anymore

You need to check voltages on HVPS Developer Bias Pwb = item no. 16
Measure the bias voltage, on electronic board, for all three colours and compare.
If you have voltages there then you can change the item no 15 = Charge HVPS.

[InterfaceP]

Re: xerox 252 not printing cyan anymore

Charge HVPS.jpg

That other Forum wont let me load photos. It's no wonder more people use this one.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

Check developer bias contact as on attachment pictures.

I checked the Bias as per photo, it seems fine. It has to be something else of this nature. Meantime problem persists.
Please Help!!!

[mpsolutions]

Re: xerox 252 not printing cyan anymore

Check developer bias contact as on attachment pictures.

Thank you so much. I will check that 1st thing tomorrow.

[xcopytech]

Re: xerox 252 not printing cyan anymore

Check developer bias contact as on attachment pictures.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

There is no cyan toner on cyan drum.
i have already changed the cyan drum and the cyan developer housing from another machine.
so the only thing left to check is the lack of voltage on the developer unit.
how do I check that?

Update: the tech was here today, checked all the gears and Mechanics and changed Cyan developer. Now he is sure it's a voltage problem.
Because the machine prints a rough surface blue on whole sheet.
According to him, he never encountered this problem, and does not know how to fix it.
Any ideas?

[adriansto]

Re: xerox 252 not printing cyan anymore

No, unfortunately not.
the machine was fixed by xerox tech. But no longer since 6 months ago.

It's time to purchase one and follow the service procedure from there.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

You don't have already a service manual for this copier ?

No, unfortunately not.
the machine was fixed by xerox tech. But no longer since 6 months ago.

[adriansto]

Re: xerox 252 not printing cyan anymore

You don't have already a service manual for this copier ?

[mpsolutions]

Re: xerox 252 not printing cyan anymore

First step is to go into sevice mode and choose cyan 50% test print on A3 format.
Select execute then panic stop the machine while printing the test.
Open the drums drawer and check if there are cyan toner on cyan drum.
If exist then go to the ibt and check for btr1.
If no toner at all on cyan drum then the problem can be from defective cyan drum, defective developer unit or lack of voltage on dev unit.
In the worst scenario there is a problem with cyan ( laser unit ) ROS

There is no cyan toner on cyan drum.
i have already changed the cyan drum and the cyan developer housing from another machine.
so the only thing left to check is the lack of voltage on the developer unit.
how do I check that?

[adriansto]

Re: xerox 252 not printing cyan anymore

First step is to go into sevice mode and choose cyan 50% test print on A3 format.
Select execute then panic stop the machine while printing the test.
Open the drums drawer and check if there are cyan toner on cyan drum.
If exist then go to the ibt and check for btr1.
If no toner at all on cyan drum then the problem can be from defective cyan drum, defective developer unit or lack of voltage on dev unit.
In the worst scenario there is a problem with cyan ( laser unit ) ROS

[tasosGR]

Re: xerox 252 not printing cyan anymore

Hi everyone,
I just changed the MOB sensor on my xerox 252 due to a faulty misregistration problem, and now the machine does not print cyan anymore.
Is this related to the MOB sensor? Registration is perfect now, but I still get all NEG on regisrtation procedures. How is that possible?
Any idea about the problem with the missing cyan.
By the way, I changed IBT belt and put new cyan drum, still same problem.
your Help is very much Appreciated.

You must check IBT frame (inside ibt belt), because your problem start when you replace ibt belt.
Check 1st BTR.