1.Restoring Factory Settings
Press the [GR] and [CH/ID] buttons for 2
seconds, and the flash will resume factory
settings (radio slave mode, channel CH1, ID
0000).
2.Firmware Upgrade
1).Log in the YONGNUO official website
(www.hkyongnuo.com) to download the
upgrade software and the latest
firmware.
2).Power off, use USB-Micro USB cable
connect to PC. (Do not include cable)
3).Pressing the [ ] button and set the
power switch to [ON], the LCD will display
firmware upgrade interface.
4).Complete the firmware upgrade
operation according to the prompt of
software.
-10-
Other Functions
3.About Overheat protection
When continuous flash, the temperature of the flash tube may
increase, a warning icon[ ] icon will be displayed on LCD panel, and
the recycling time will be longer.
When repeated firings of the flash, the overheat protection
function will be triggered, the LCD is lighting in red, the speedlite will
be locked ,in such case, please wait for about 3 to 5 minutes before
continuing use.
When the speedlite warns overheating, please reduce the use
intensity.
Please mind the flash tube when you take it out after the
continuous shooting.
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