After updating the Prism III firmware from 6.007 or lower to 6.008 or higher, the Ribbon Sensor must be calibrated. Follow the procedure below to calibrate the sensor.
- Remove the ink ribbon from the printer.
- Press and hold the printer operator button as if resetting the ribbon (6 - 8 seconds).
- When the printer tray pauses partially open, release the button, then quickly press and release it twice.
- The printer emits a high pitched beep to indicate that the ribbon sensor calibration completed successfully.
Note: The printer will continue to operate if the ribbon sensor is not calibrated, however, the green power LED will flash rapidly and the printer may encounter ribbon detection issues.