Missing developer unit for kyocera FS-3900, can anyone give bit of idea? tried to restart several times, it still remained the same

Hello,
the error Call Service 7410:xxxxxxx usualy is about the Drum Unit not fully inserted in the printer.
On the left side of the printer you will need to open the cover and push the Drum Unit in place.
After it clicks in place power off and on the printer.
Best regards.

Hello,
this error is about the Magenta developing unit.
Please check the connection between the ptinter and the developing unit. Restart the printer after that.
If the error will not go away after that you will have to replace the Magenta developing unit.
If the error still will not go away you will have to replace the engine power board.

Best regards,
Marius

The developing unit is where the toner sits upon.Remove the toner cartridge and ensure that the developer unit is correctly inserted.Then re-instal the toner cartridge.

The lines are more than likely caused by either the Drum, Developer or Fuser unit. I have found in many cases that if non genuine toner is being used this will give you poor quality images. You can try using genuine toner which may resolve your issue but you may have to run a few hundred prints to clear out the old toner before the image improves.

Check that the toner you are using is genuine Kyocera, also that the toner hasn't run out, this is normally a toner related issue.

Try installing the developer unit.

The message is indicating that you do not havea real Kyocera toner installed in the machine.

open printer front cover and remove drum unite ,two side screw open two side spring **** two side open drum
if you are not possible it then buy a new one unite in your service authorized delar

sounds good

I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

Generally this printer can be separate into 4 major part: Printer body, Toner container, Developer unit and Drum unit. The developer unit is the unit where the toner container "mount" on it and it should be removed to allow cleaning task every time the toner container is replaced.
U may get this error message if the developer unit is not install properly after u replace a new toner container. Just lift the developer unit together with the toner container out of the printer and then insert back properly into the machine.

YBC (/\)