How do i fix error code f510 for toshiba e studio 3040c

SOURCE: C448 on Toshiba e-studio 2500c

C448 indicates Heater lamp lights continuously for a certain period of time when the pressure roller temperature during ready status is higher than the specified.

1. Clear status counter
Enter 08--> 400 --> change the value from "32" to "0", press Enter and restart MFP.

If occur again, u need to check followings:

1. Check the power supply and fuser unit
2. Check the LGC board

SOURCE: how do I fix fault code C448 on the Toshiba E

C448 means you have a fusing unit malfunction. The fusing unit is the part that gets hot just before the paper comes out of the machine. You can try clearing the code using this reset procedure:
(1) Turn the power ON while [0] and [8] are pressed simultaneously.
(2) Key in "400", then press the [START] button.
(3) Change the displayed current status counter value "32" to "0", then press [ENTER] or [INTERRUPT] (to cancel C448).
(4) Turn the power OFF and then back ON.
If the code comes back you are going to need a fusing unit.

SOURCE: how to fix error code c448 for toshiba estudio 2540c

U need to check the fuser belt thermopile and power supply unit.