Firmware-Upgrade Software

4. Make sure the device is connected to AC power supply.
Note: Do not use battery to power the device for firmware upgrade.
5. Turn on the device.
6. Rotate the source selector to USB position.
7. Press to open the compartment.
8. Insert the USB flash drive into the USB socket inside the compartment.
9. The device will search for the upgrade files in your USB flash drive. When upgrade starts,
there would be an audio signal (4 short beeps and 1 long beep). “UPG” is displayed.
Important:
DO NOT remove the USB flash drive during upgrade.
DO NOT press any button during upgrade.
DO NOT interrupt the power supply during upgrade.
10. When upgrade is completed, there would be a continuous beeping.
Note: The beep is loud and does not stop until the device is switched off.
11. Switch off the device.
12. Remove the USB flash drive.
Step 3: Confirm upgrade successfulness
1. Go over “Step 1 Check the current firmware version” to verify if the new firmware is
correctly upgraded.
2. If the latest firmware has not been installed, repeat ‘Step 2 Upgrade the firmware’ and
‘Step 3 Confirm upgrade successfulness’.