xerox 252 not printing cyan anymore

[mpsolutions]

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.

[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.

Take a look at the cyan housing gears (inboard gear)

[mpsolutions]

Re: xerox 252 not printing cyan anymore

I removed the developer cover and cheated the fornt door, the developer gears seem to run just fine, what else do I need to check.

[tasosGR]

Re: xerox 252 not printing cyan anymore

I removed the developer cover and cheated the fornt door, the developer gears seem to run just fine, what else do I need to check.

1. Enter the Diagnostic Mode. Refer to Entering PWS Diagnostic mode.
   
2. Select dC675 from the DC Quick menu.
   
3. Select Start.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

1. Enter the Diagnostic Mode. Refer to Entering PWS Diagnostic mode.
2. Select dC675 from the DC Quick menu.
3. Select Start.

Is this done thru PWS (I dont have one), or it can be done thru the touche screen, and How?

[tasosGR]

Re: xerox 252 not printing cyan anymore

Is this done thru PWS (I dont have one), or it can be done thru the touche screen, and How?

1.

[mpsolutions]

Re: xerox 252 not printing cyan anymore

I did the Registration Control-setup cycle as requested. Now the machine is printing out of register again. And still not printing cyan.
Help!!!

[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.

[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

[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

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

[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

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

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?

[xcopytech]

Re: xerox 252 not printing cyan anymore

Check developer bias contact as on attachment pictures.