Epson has discovered an issue with the firmware on the mPOS versions of the UB-E04 interface and the T20II Ethernet Plus printer. The problem may occur when the printer is taken offline (e.g. to replace the paper roll). The printer may not recover and could remain in the offline state, requiring a power cycle to recover. We recommend that you download the update instructions and utility for your products as listed below. This procedure will update the mPOS firmware versions for the respective printer models.
Download the firmware update, with instructions, for your product below. Be sure to carefully follow the update instructions included with the download.
Important: Do not turn off the printer or computer while this update is being applied.
| Product Code | Model |
| C32C824A8811 | UB-E04 Ethernet interface board; mPOS friendly |
| C31C514A7881 | TM-U220B Ethernet (E04) printer; mPOS friendly |
| C31CB25A5971 | TM-H6000IV Ethernet (E04) with MICR and Endorsement; mPOS friendly |
| C31CD38A9782 | TM-T70II Ethernet (E04) printer; mPOS friendly |
| C31CA85A5742 | TM-T88V Ethernet (E04) printer; mPOS friendly |
| Product Code | Model |
| C31CD52A9912 | TM-T20II Ethernet Plus printer; mPOS friendly |
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