Pioneer avh-4200nex System Firmware Update Instructions - Page 5
Browse online or download pdf System Firmware Update Instructions for Receiver Pioneer avh-4200nex. Pioneer avh-4200nex 8 pages. In-dash multimedia av receiver
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8. Touch [Firmware Update].
The "Firmware Update" screen appears.
9. Touch [Continue] to display the data transfer mode.
Wait for the file check to finish.