SATO WS408DT Technical Manual page 91

5 Update Firmware
10. When the data transmission is complete, your printer starts to update its
firmware. During the update, LED 2 turns to red and orange alternatively,
while LED 1 turns to solid green. In the Download Firmware dialog box, the
message shows that your printer is updating the firmware.
11. Printer will restart automatically after the message "Firmware Update,
Succeed" appears.
12. When the update is complete, the message "Firmware Update Complete"
appears. Click Close to close the dialog box, or click Save Log to save the
Update Firmware in SATO WS4 Printer Utility
87