more Cyber issues!!

I have a cyber hanging in a club that has been giving me what seems to be a common issue, it would boot up then run fine for a while then...... the bulb would go out and it would stop responding to dmx, then after 10 mins or so power down. Sometimes it was down for the night sometimes after a few mins it would reboot and run again, sometimes only for a few mins and other times for hours. Hell some nights it ran all night like a champ!! I've read all the post on here that seem to apply, and here is what I've done so far:

swapped out the 14 pin harness a few times--same

swapped out logic board a few times --- same

and yes the xlr connectors are locked

and today I pulled the power board resoldered the contacts, the reason for this is that if you bang on the light it starts back up making me think it's not a electric prob but something physical like a cold solder joint or component on the board. When I put it back in and everything worked fine....... however I do notice that one fan was not spinnig(one of the bottom ones) the light ran for about an hour when I noticed the lamp was out, it was running dmx fine. I was even able to re strike the lamp from the board, so I'm thinking it overheated. So I powered it off and back on, now here where I am lost? The all fans runs when the power is frist turned on it starts to home, stops for a sec the one fan then stops and it finishes homing and runs?
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    Note that the switching circuit is in the cold side (to ground) of the fans. You need to measure the 24V supply in reference to ground, and make sure that the 24V rail is correct, and if it is not, then check SC5 and SC6, as well as IC9 and the associated parts in the switching regulator diagrammed on the page prior to the fan control circuit. If that is correct, but you still see less than 24V across the fan connectors, then move on to T3 and T4. I would not typically suspect the IC driving T3, since those are on/off logic, and it *is* switching . . . You might also disconnect one fan at a time, to be sure that you don't have one that is failing and drawing too much power and pulling the others down, or even more simply, that you don't have a harness short that is being aggravated by the vibration of the fixture homing . . .

    Note also that that 24V supply also powers all the stepper motors in the fixture - I assume that everything else is working? If so, then it's probably a fan, or T4. (To test T4, you can jumper across T4 emitter to collector, which should turn the fans on. If they still don't come on, then it's a fan, the harness, or the fuse . . .

    - Tim
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  • 0
    Note that the switching circuit is in the cold side (to ground) of the fans. You need to measure the 24V supply in reference to ground, and make sure that the 24V rail is correct, and if it is not, then check SC5 and SC6, as well as IC9 and the associated parts in the switching regulator diagrammed on the page prior to the fan control circuit. If that is correct, but you still see less than 24V across the fan connectors, then move on to T3 and T4. I would not typically suspect the IC driving T3, since those are on/off logic, and it *is* switching . . . You might also disconnect one fan at a time, to be sure that you don't have one that is failing and drawing too much power and pulling the others down, or even more simply, that you don't have a harness short that is being aggravated by the vibration of the fixture homing . . .

    Note also that that 24V supply also powers all the stepper motors in the fixture - I assume that everything else is working? If so, then it's probably a fan, or T4. (To test T4, you can jumper across T4 emitter to collector, which should turn the fans on. If they still don't come on, then it's a fan, the harness, or the fuse . . .

    - Tim
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