Drucker Toshiba e-studio 2540 CSE

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 „2002“, then press the [START] button.
(3) Change the displayed current status counter value „32“ to „0“, then press [OK] (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.