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This topic comprises 2 pages: 1 2
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Topic: Exciter Lamp voltage in Cinemaccanica CC-2500H Console
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Tim Reed
Better Projection Pays
![](/ubbmembers/137h.jpg)
Posts: 5246
From: Northampton, PA
Registered: Sep 1999
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posted 12-10-2002 01:10 PM
To the rear of the door, I meant, when the door is open -- "right-side", okay.
Alright, if it's got the CA/CC switch (i.e. "current alternating/current continuous"), it's a little older than the one I described. I believe there is no adjustment on that, other than changing the taps on the transformer, but you shouldn't have to do that. (Humm, there might be like a 25W adjustable resistor, though.... it's been a long time since I saw one that old.)
Check your exciter lamp socket, to be sure you're not losing contact there. It's not a 9V-4A exciter, and is like 3.5-4V, the little skinny bulbs with the dimple in a straight base? Often, the tip contact of those sockets oxidizes and causes the bulb to glow dimly. That may be the problem. I've had luck with emery cloth on those... for a temporary fix until a new tip contact can be installed. Also check the connections to the socket proper.
If the igniter's mounted on the console sub-floor or wall, then it's easy to just change it out. On the later models, the whole lamphouse plenum has to come out to get to it. Also, check to make sure the nichrome wire is clipped OFF of the xenon bulbs. They have a tendency to cause the ignition pulse to arc to the reflector in that console.
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Tim Reed
Better Projection Pays
![](/ubbmembers/137h.jpg)
Posts: 5246
From: Northampton, PA
Registered: Sep 1999
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posted 12-10-2002 04:43 PM
It's either the exciter socket, or the power supply is on the blink. I'll bet it's the socket or a connection, because switching to "CA" should give the bulb full brightness; I don't think there is anything else in the circuit at that point but the transformer (and, of course, all the connections along the way).
You might check for tight, clean connections at the supply and the switches... They also used quick-disconnect terminals for a lot of connections along the terminal strip inside the lower console door. Some exciter connections are made there, too. I have found those burned sometimes.
If you haven't already, try using the manual switch on the automation, in case the relay inside is pitted.
Most GCC houses had a spare exciter supply. If this isn't available, I would swap the suspect unit with one from another house. That would tell you for sure where the problem lies.
If the owner won't supply you with parts, then I wouldn't worry too much about it. There is only so much you can do with nothing.
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