Set up your flash to remote, ,group and channel. Make sure they are on the same channel as the transmitter if your are using more than 1 flash, groups can be different but all must be set to the same channel.
On the transmitter, decide whether you want to use your flashes in i-TTL or manual mode. You can switch between them by holding down the GP/MODE button on the transmitter.
Green LED = TTL mode
Orange LED = Manual mode. Yongnuo uses a different power scale than the camera so it is referenced to power and not stops.
Hold the shutter button halfway down or back button AF if you have your camera set for that button to initiate AF. This a signal to the receiver in the flash, then press it all the way to take a picture. The Flash display in remote mode will display power setting, mode and zoom focal length beam width. After connection is established, making a change such as zooming the lens will reflect in display and flash head focusing mechanism with activate.
Check your picture. Are all of the groups firing at the right exposure? If not adjust the power if you are in manual mode
If not, you can increase/decrease the output of each group independently of one another. First, hold the shutter button halfway down to enter transmitting mode. Then, hold down the + or – button on the transmitter so that it starts cycling through C1, C2, C3, A, B, C…
To increase power by one stop, hold the plus (+) button down and let go when the correct LED is illuminated. C1 for group A, C2 for group B or C3 for group C.
To decrease power by one stop, do the same, but holding down the minus (-) button.
To increase power by 1/3 stop, hold the plus (+) button down and let go when the correct LED is illuminated. A for group A, B for group B, C for group C.
To decrease power by 1/3 stop, do the same, but holding down the minus (-) button.
The most common cause of the flash not responding is it set to a different group or channel.In more complex lighting setup, making adjustments quickly is confusing so if controlling a lot of lights in different groups, the YN622n Tx is much easier, having a LCD screen that instantly tells you the status of each group setting. For evens when lighting needs change quickly, and time is important, the Tx controller makes it a snap. If you are using just a couple lights and all have the same power setting and zoom focal length then the regular Transceiver is fine, in most cases is using TTL mode you only have to turn them on and you are ready. I have had excellent results with mine. In the studio, being able to make adjustments in formal setting for fashion, fine art or portrait, from the camera without running between flashes is a big benefit. In most remote flash work, you will be using manual settings for obvious reasons but for single flash portraiture or with reflectors or or scrims, TTL works well.