Printronix: Check Firmware Version From the web portal , click the Available Printers menu. Locate your printer, then click the Settings icon. Check the value for the Firmware property. At the time of writing, these are the latest firmware versions: T800 (T820, T830): V1.48E T4000 (T4204): V1.46H T6000e (T6304, T6604): V1.42E To update your printer, follow this guide: Printronix: Update Firmware