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I have a Chauvet Obey 70 DMX controller. I used it to control 4 54x3w LED stage lights. We purchased 4 more identical lights, and began to hook them up. The fifth light worked fine, however I have no control beyond that. They are all set to the same address, so they would all do the same thing, but only the first 5 are controllable. It doesn't matter if I use a terminator or not, it does exactly the same thing. I've tried changing polarity, but then I can't control anything. I've reset the board and changed cables, and the way the lights are daisy-chained and still have the same problem. Any Ideas? Thanks. Rick
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They are not worth trying to fix, if you really like this unit you can get a secondhand one for about 25GBP or find one from a decent manufacturer or even better how about a USB interface to DMX for your PC?
I am not sure if you are using a DMX controller or a standalone setting. If on standalone, sound triggers a random reversing, stopping and flashing mode. I am NOT sure that a stationary mode is available without being commanded by a DMX controller. If you are using a DMX controller get back to me and we will analyze what the problem is. If using a DMX controller, tell what address you are using and the length of the control cable.
Read about terminating the chain with a resistor 120 ohms. If your run has appreciable length, a termination MAY be necessary to avoid digital reflections that can corrupt the message between the control and the lights. Having separate power sources CAN subject the units to "ground bounce" that can also corrupt the digital control. You need to power all the units from a single source or conditioner if possible. Another solution might be to use one of the DMX radio links which would isolate the ground problem. Another fix you MIGHT try is to get some of the clamsheel ferrite devices that clamp around the wires. Put these around the digital cables, not the power cords:
Before jumping to conclusions, one should do some testing. It is posssible that you are having a DMX data error. If your lines are long, please review the need for a termination resistor at the far end of a DMX chain. The reflections of the data pulses can confuse or cause errors. Test a unit up close to your controller so the cable is short. If that magically works, install a terminating resistor.
Beyond this, electronic testing needs to be done. I did find in a Chauvet LX5 a bad solder joint at a connector that brings the power for, in my case, the green LED's. There will be surface mounted resistors on the back of the board that limit the current to groups of LED's.
If the whole fixture loses the blue at once, either suspect a DMX error or the driver in the fixture.
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