Error ce40 call for service was appeared on the screen and on the rigth of the screen is ce40

Do u mean CE40? Because there is no CD40 error code...

CE40 is image control related service call where the image quality control test pattern abnormal.

Image quality control abnormal detection display/0 clearing
08-2528 Y
08-2529 M
08-2530 C
08-2531 K

From above u know which process unit giving problem, then further check the main charger, developer...

CE40 is image related error, u need to check which pu giving the problem...

Still the same

Perform 08-2002 "0" to clear the error

If problem persist, clean/replace the themopiles

Search online for "error code ce40 + your make & model"

CE40 is image related problem, u need to check which PU is giving the problem

I want to locate the position of the image sensor for a toshiba E-Studio2500c.

[CE40] Image quality control test pattern abnormality

1.Replace the image quality sensor

2.Set the values of "Image quality closed-loop control / Contrast voltage (08-556)" and "Image
quality closed-loop control / Laser power (08-557)" to "1" (Valid). MEANING Shutdown the machine,press 0+8,while starting the machine, enter 556 then enter 1,confirm it,then press 557 then 1,confirm it.
Below are further instructions in the same way

3.Perform "Enforced performing of image quality open-loop control (05-394)" and make sure it is
completed normally. (Error [CE40] does not appear.)
4.Clear all "Image quality control abnormal detection counter Y to K display/0 clearing (08-573 to
576)"

That is it

re install you system only... or that is problem from the operating system

re install the install the rigth driver to avoid the error...

thanks