Canon SPEEDLITE EL-1 Advanced User's Manual page 128

8.
Check the operation.
Press the sender unit's test flash button.
The Speedlite will fire. If it does not fire, check that it is placed within
the transmission range (
9.
Take the picture.
Set the camera and take the picture in the same way as with normal
flash shooting.
Caution
When the <
transmission channels and wireless radio IDs of the sender unit and receiver unit
again. If you cannot connect with the same settings, turn the sender unit and
receiver unit off and on again.
> lamp is off, radio transmission is not possible. Check the
).
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