JRC NWZ-4740 - Precautions Upon the Operation; WARNING

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2.4. Select Com Port , and then the connected COM port number and bit rate.
The same bit rate as the NWZ-4740 must be selected.
2.5. Click the 1. File select button and select the update file (xxxxxx.bin).
Check that the message "File select ok." is displayed in the Msg box.
Bit Rate Setting
COM Setting
File Name Display