Yaesu FT-991A firmware v2.07

FT-991A Firmware Update and Version Identification The latest versions are listed below with the release dates.  MAIN Firmware Ver. 02- 07 (06/18/24) New  TFT Firmware Version 02-00 (10/17/17)  DSP Firmware Version 01- 12 (06/24/20)  C4FM DSP Firmware Version 04- 15 (12/02/16)  FT-991A_Firmware_Ver_Up_Manual_ENG_2405- C.pdf (06/3/24)

• 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 f irmware installations.

Each installation must be followed carefully.

Installing the wrong type of firmware may cause difficulties.

Check your radio before installing firmware to be sure which updates are needed.

Please read the FT -991​A Firmware Update 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 of 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 the current version firmware with the following procedure: (This image & version is for illustration only) Download the FT-991A data and [ FT-991A_MAIN_V0207_2406.zip ] from the following website: https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=490C 4A71118AD0F4E825E89D821B73BB&DivisionID=65&isArchived=0 The zip file contains all the current firm ware versions.

Please verify which version of firmware is already on your radio before updating.

If you have each of the listed versions, you do not need to update the radio again.

Please read the FT -991A Firmware Upgrade Manual before proceeding!

Implements improvements: Updates: MAIN V02-07 for web release (2024/06) New

• Fixed the bug in MAIN V02 -06.

Updates: MAIN V02-06 for web release (2024/06)

1. Fixed the issue where the displayed frequency would change when QMB was operated during PMS.
2. Changed the behavior of the A/B key during PMS to swap VFO A/B.
3. Fixed the issue where the MIC EQ did not work when transmitting with VOX.
4. Other functional improvements and optimizations have been made.

NOTE

• After updating the firmware; please reset the transceiver ​using the following procedure:

1. Press and hold the [POWER] key on the front panel to turn the transceiver ON.
2. While the transceiver is ON, disconnect the DC power cable from the DC-IN connector on the rear panel and turn the transceiver OFF.
3. Press and hold the [FAST] and [LOCK] keys on the front panel, connect the power cable into the DC-IN connector on the rear panel and turn the transceiver ON.

We hope this new firmware will increase your enjoyment of the FT-991A.

Thank you for choosing Yaesu radios.

If you have any problems or questions, please contact Yaesu, Amateur Tech Support amateurtech@yaesu .com .

Thank you, Yaesu USA Yaesu USA | 6125 Phyllis Drive | Cypress, CA 90630 | 714.827-7600 | FAX: 714.827-8100 http://www.yaesu.com