Fender Mustang LTX Firmware Update Instructions
1. Turn the amp off
2. Download and install the Fender Device Manager app
a. Windows version: Download
b. Mac Version: Download
3. Open the Fender Device Manager App
a. On a Mac computer, click Allow in the "Allow Device Manager to connect to devices on the local network” prompt
4. Connect the amp to a computer with a USB cable
5. Press and hold the Firmware Update button on the back of the amp (near the USB-C port) while turning on the power switch
a. You should see an Update button in Fender Device Manager if the amp is in firmware update mode.
b. The red LED next to the firmware update button should be blinking as well when you are in firmware update mode
6. Click the Update button in Fender Device Manager
7. Select “Yes” in the next prompt to start the update
a. The update will take several minutes. Wait for Fender Device Manager to tell you the update is complete before disconnecting the USB cable or turning off the amp
8. When you see the “Firmware has updated successfully” message,
a. Turn the amp off
b. Wait for the red LED next to the firmware update button on the back of the amp to stop blinking
c. Turn the amp on again
9. The firmware update process is now complete.