Transistor temperature error (error code: 031003)

Occurrence condition

  • Occurs if the main board exceeds a set temperature.

Suspected cause

  • The ambient temperature around the Main Board has exceeded 95 degrees C.

  • Main Board failure.

Related parts
  • Main Board Assy
Troubleshooting
ProcedureCheck and measureYesNo
1

Check if the error occur with turning the printer off and on.

  • Does the error occur when turning the power off and back on?
Go to step 2

End

2

Replace the Main board Assy.

  • Does the error occur after replacing the Main Board Assy?
Contact the EPSON Service Department.End