Only for the limited revision of FP-2000 series, you need to update the firmware when you use RS-232C or LAN interface card.
Please check the date of manufacture which is indicated bottom of the printer.
Please find the details how to update the firmware , and please download the firmware to update for using interface cards of RS-232C and LAN.
- Details & How to update firmware (601 KB)
- Download the firmware (12.3MB)