Paul C. Buff, Inc. Technical Forum

I have a Paul C. Buff CSRB CyberSync Receiver and a CST CyberSync Trigger Transmitter. They worked fine with my Canon 580II in firing off camera. But recently the transmitter does not work anymore(tried changed the battery). The receiver works fine when I press the testing button, but when I press the test button on the transmitter the red lights blinks but the flash won't flash. Please advice what should I do.

Are you sure they Tx and Rx are on the same frequency? If the frequency did get changed, set them both back to the same frequency and then make 3+ trigger attempts to get them talking again. Also, for clarification, when you press the test button on the Rx does the flash fire? What does the red led on the Rx do when you press test on the Tx?

Also, how many times does the LED blink on the transmitter when tested. It should only be once.