Pioneer AVH-X4700BS System Firmware Update Instructions - Page 2
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4. Touch the [Setting] icon.
5. Select [System information] for select menu of system
setting.
6. Select [Firmware information].
7. Confirm current version of the product.
(If the firmware version shows "8.31" or higher, no further action is necessary.)
A. Downloading the Firmware Update Files
1. Download the firmware update files by clicking on the following link and finding your product:
pioneerelectronics.com/firmware