Flashpoint and Cybersync won't trigger

I am having issues with my Cybersyncs triggering my Flashpoint 320M. When I try to use the 1/8 to 1/4 cable it does not fire. The strobe will still work with the optical slave built in if I use another light to trigger it. The light on the receiver flashes, but it does not trigger. Could it be as simple as needing new batteries, or is there another method to test it?

Two possibilities:

1) Can you manually trip the flash by plugging in only a sync cord (do not plug in the radio receiver) and shorting the contacts on the free end. This should fire the flash and tests the sync cord.

2) Any possibility the flash has reversed sync polarity? The CyberSync will not fire a flash that has reversed sync polarity. If you are electrically inclined the tip on the free end of the cord (as above) should be positive.

Enjoy! Lon

1) yes
2) huh? How would that happen?

FlashZebra wrote in post #14301753
2) Any possibility the flash has reversed sync polarity? The CyberSync will not fire a flash that has reversed sync polarity. If you are electrically inclined the tip on the free end of the cord (as above) should be positive.

Enjoy! Lon

How can I check the polarity? Everything seems to work with other strobes and flashes, slave triggers it with another flash, test button works, so it must be related to the sync port (1/4" mono) not working...not sure how to correct this.

Scooter650 wrote in post #14303466
How can I check the polarity? Everything seems to work with other strobes and flashes, slave triggers it with another flash, test button works, so it must be related to the sync port (1/4" mono) not working...not sure how to correct this.

Again, if you are electrically adept checking the polarity is easy.

You must have a Voltmeter set to an appropriate DC Voltage range (a 20 Volt range should be about right).

Connect the meter with the positive lead to the tip contact on the free end of the cord coming from the flash.

Connect the negative lead to the sleeve contact on the free end of the cord.

If the Voltage reading you get is positive the polarity is correct. If the Voltage is negative the polarity is reversed.

But, you must be sure you connect positive and negative leads from the meter correctly.

If this explanation does not resonate you must seek help in how to properly use a Voltmeter.

Enjoy! Lon