H o l d d o w n t h e [ M O D E ] a n d
[SYNC/FN] buttons at the same time
until the screen as shown, then
loosen to restore factory settings.
1).Visit YONGNUO official website:
http://www.hkyongnuo.com to download the firmware
upgrade software and the latest firmware.
2).Turn off . Keep pressing [mode] button and turn on again. The
screen will show
3).Connect the controller to PC via USB-MINIB cable
.
4).Complete the firmware upgrade operation according to the
prompt of software.
firmware upgrade interface(will display the
current version ).
(not
include)
6.USB Firmware Upgrade
5.Factory Reset
Reference
19
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