help me please toshiba fc 15

[baderten]

hello all
i am new in work.
i am install new DEVELOPER in my machine
but say code CB3
help me to repair it
i dantno what LGC , EPU

Is the harness between the LGC board and the EPU drawer connector open-circuited?
Is any harness inside the EPU or the auto toner sensor harness open-circuited?
Is the auto toner sensor connector or the connector J119 on the LGC board disconnected?
Reconnect the connector. Replace the harness.
1. Replace the auto toner sensor.
2. Replace the LGC board.

[Mr Spock]

I believe that is a finisher lower tray error. check and make sure the tray is level and nothing under it.