| Group B |
| 1 | Select the STANDBY Press the [SRC] button. |
| 2 | Enter Function Control mode Press the [FNC] button. |
| 3 | Enter Menu mode Turn the Control knob to select "MENU", and then press the Control knob. |
| 4 | Select Bluetooth Firmware update Turn the Control knob to select "BT F/W Update", and then press the Control knob for at least 1 second. |
| The firmware version appears. |
| 5 | Exit Bluetooth Firmware update mode Press the [FNC] button. |