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Author Topic: Interlock Failure Christie 2210 Bradley J Sime Film Handler Posts: 68 From: Edmonton, Alberta, Canada Registered: Apr 2016 posted 09-24-2016 11:39 AM                     Sorry, what is the vane switch?  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 09-24-2016 01:33 PM                     There are no vane switches in a 2210. The larger Christies use them as airflow switches. An example of one is below.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 09-24-2016 02:53 PM                        Thank you for the information on the thermal switches, Steve  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 09-24-2016 07:28 PM                     I'm with Sean what said a few posts ago in that safety interlocks are there for a good reason, and in general, I don't advise bypassing them except in an emergency to save a show. I ran into a situation earlier this year during a screening. (film) Full house. No automation, I run everything manually. But when I went to strike the xenon, - - nothing happened. Indicator lights showed I had AC to the lamphouse and igniter. I knew my igniter was in good shape, so I felt sudden failure was unlikely, although not impossible. But I also knew that the igniter primary ran through a relay that wouldn't close unless all the safety interlocks were operating. . . & I didn't hear that relay clicking, so I suspected the interlocks. Opened the lamphouse door, and sure enough, it was that pesky exhaust stack "vane switch". In fact, the 'vane' had disappeared entirely! I suspect it somehow got loose and sucked up through the exhaust system. Not wanting to keep "the house" waiting, I shorted out the interlock terminals and started the show. But I didn't want to leave the switch contacts shorted, so before the next show I managed to make a replacement 'vane' out of some heavy duty black-wrap foil I had in the booth, & un-shorted the interlock switch. Worked like a charm! >Actual Photo !<  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 09-25-2016 11:22 AM                        That was my only intent that one should be careful to make sure it is a faulty switch and not another condition and to make sure it gets replaced or if it is felt to be redundant and unnecessary that the bypass be done in such a way that it won't become an open circuit on you and lead to a failure and possible passed house. Obviously it would be silly to dump a 1,000 seat house over an interlock if you can verify a bad switch but I'm sure we have all ran across those lamp houses or consoles where booth staff just twisted all the bare wires together and left it that way for years until a new tech or service company comes in and hopefully does a thorough inspection instead of getting caught in an unsafe situation. That's all. Hopefully Steve's (as usual) good advice helped you get back on screen.  |  IP: Logged Bradley J Sime Film Handler Posts: 68 From: Edmonton, Alberta, Canada Registered: Apr 2016 posted 09-26-2016 05:17 PM                     Good to know guys. It looks like it was the door switch or the harness or something. I got it all replaced (wasn't too dear) and the proj has been running sound for a couple nights. We'll see.... Thanks for listening.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 09-29-2016 05:39 PM                     Why is the 'Interlock-Switch' called 'Interlock-Switch', even on a digital projector? Is that a generic term? I guess in this case the meaning is different from film-interlock? Wondering wether we have a suitable german word for it... - Carsten  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 09-29-2016 08:32 PM                       Interlock is used more as in safety or electrical interlock than film interlock as in running more than one projector in series.  |  IP: Logged

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