CD80 Supervisor brains fried (maybe?)

spectrum

Member
Hi everyone. I'm brand new here...ran across this thread earlier in the week while trying to do a little online "research" on an issue we're having. I recognize there's some knowledge base here and am hoping someone might be able to help.

It would seem that the brains on our CD80 Supervisor have given up the ghost. I have been kindly pointed by my very helpful local lighting dealer to Johnson Systems, who I see mentioned above in this thread as well. I am planning on purchasing the retrofit, which seems to be the way to go assuming that I have correctly diagnosed the problem.

And there's the rub. I'm still having nagging doubts that there may be something simpler going on, and nobody seems able/willing to diagnose. Our school district electricians are not familiar enough with Strand products and Johnson Systems, understandably, says they are in the business of sales, not servicing our existing system. But we're about to drop 8 grand....it would be nice to have some assurance that we've got it right!

So, maybe some here might have some ideas if there is indeed anything simple I've overlooked.

Normal Situation:
1. Three wall panels that control house lights (pot lights, mezzanine, sconces, step lights).
2. ETC lighting board that can also control house lights as well as all other theatre lighting instruments

Symptoms:
1. Not able to bring up any lights with the usual methods: wall panels & lighting board
2. "local panic" button on CD80 brings up house lights only (obviously hard wired this way?)
3. As expected, with local panic on wall panels/lighting board can not control
4. Simultaneous with the above, a clickity-clicking noise from the lower part of the CD80 Supervisor unit (fan belt?)
5. Fan still works - comes on when "local panic" is activated
6. Tried cutting power to the CD80 then turning back on (from the breaker box) to see if computer would "reset". No such luck.

My Diagnosis:
1. Not a breaker off or faulty dimmers since local panic brings a set of lights up.
2. Not our wall panels or lighting board since they visually SEEM to be operating as normal (other than the fact that no lights come up, of course)
3. Not just something like an unplugged dmx connector from lighting board since the wall panels also don't work
4. Must be the brains of the CD80???

Questions:
1. Is it possible that the connection from the wall panels/lighting board into the CD80 itself has been disconnected? Where is this - how would I check?
2. Although it is probably just a wiring choice 16 years ago that makes the "local panic" function bring up the house lights only, it does bother me that it is the same set of lights that can be controlled by both the lighting board AND the wall panels. Is there a chance this is something going funky in the communication between the panels, board, and CD80?
3. Any other possibilities I might have missed?

Any help any of you can offer would be most appreciated!
 
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Hi there what part of BC are you from?
I have also had to change out the brains of a CD80 supervisor, I am woulder what is the read out on the display of the CD 80?
 
CD80 racks

Call those guys. If they can't fix it, no one can. My small theatre has an original AMX CD-80 rack that is still going strong. My last gig had two supervisor racks that had the johnson controls retrofit and they were great. It really is worth the cash... it gives you a whole new rack for an 1/8th of the cost.
 
Does your rack have a set of cards in the bottom, they are labeled dimmer processor, power supply, or is there a set of a little cards all lined up together. There were three generations of electronics in these racks and two of the 3 generations were in the supervisor racks. Also possibly mounted on the wall of your dimmer room is a large gray strand box. This would be the processor to your architectural system that could have freaked out causing the problems you are having. If you have the newer electronics your rack will have an LCD display with a key pad next to it. Through the software you should be able to control any of the dimmers and set the input protocol. I would give enlighten a call on troubleshooting your rack they know these dimmers like the back of their hand. Their web address is Emlight Design - Dimmer and Lighting Control Service - Home Page
 
If it is a CD80 SV and you do not see a display, you may have the security cover. It was mostly popular with schools.
We, or a service center, should be able to fix the processor for you. Has the processor ever been serviced? On the processor, there is an onboard battery and some capacitors in the battery circuit that have probably gone out. Varta, the battery manufacturer, has since told us that we should expect to see a 5 to 10 year life span out of that battery; we generally see 10 to 15.
For your location, I would contact Bernard and Associates. (Bernard & Associates Manufacturers' Representatives - Lighting Control Specialists - MAIN PAGE) they should be able to help you out with either a quick repair or upgrading the processor to a C21. Please let me know if you need anything.
 

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