05/12/20
FT-991A Firmware Update and Version
Identification
The latest versions are listed below with the release dates.
MAIN Firmware Version 02-04 (05/12/20)
TFT Firmware Version 02-00 (10/17/17)
DSP Firmware Version 01-11 (09/06/17)
C4FM DSP Firmware Version 04-15 (12/02/16)
*If you already have the above listed firmware versions, it is not necessary to update the FT-991A again.
*The firmware version for Japan is different from the version on our website. The latest firmware of the Japanese version, please check the Japan WEB site: http://www.yaesu.com/jp/amateur_index/index.html.
There are four different firmware installations. Each one must be followed carefully. Installing the wrong type firmware may cause difficulties. Check your radio before installing firmware to be sure which updates are needed. Please read the FT-991A Firmware Upgrade Manual before proceeding. If multiple firmware installations are required the MAIN firmware should be installed first, as it is the only one that requires a press and hold in the [F(M-LIST)] key while turning the radio back on. This resets the radio and locks in the new firmware.
Before installing new firmware, please verify your current version firmware with the following procedure:
(This image & version is for illustration only)
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