This is topic DLP Meltdown in Toronto........ in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.
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Posted by Mark Gulbrandsen (Member # 72) on 08-28-2001, 09:29 AM:
The other night on the Film-Tech someone mentioned that there was a meltdown of the DLP chips in one of the Digital Cinema Projectors in Toronto....can anyone else add to this saga? If this really happened, I can't believe that they were so stupid as not to include a water flow switch....this is something that has been included on most large format, or high wattage flim projectors for decades. Is running a DLP cost effective? I'd say not as this repair reportedly will cost 140 grand. If only there happened to be a projectionist working the booth.......but oh well, you all know that the bean counters think it saves money not having one on staff!
Mark @ GTS
Posted by Bob Maar (Member # 763) on 08-28-2001, 09:38 AM:
Mark, The guy on the left side of your post is only pretending to be you. We know the real (reel) you. Therefore he can not be. 
Posted by Greg Mueller (Member # 17) on 08-28-2001, 10:39 AM:
HA-HA!------------------
Greg Mueller
Amateur Astronomer, Machinist, Filmnut
http://www.muellersatomics.com/
Posted by Paul Konen (Member # 41) on 08-28-2001, 12:03 PM:
There is a coolant line running across the chips and an alarm on the coolant box, but it won't prevent the lamphouse from striking.If it truly happened, I would be sure that TI will add a failsafe of some fashion to block the light. Maybe something like an automatic douser.
Paul.
Posted by Mark Gulbrandsen (Member # 72) on 08-28-2001, 02:53 PM:
All it takes is a water flow switch in series with the contactor of the lamphouse rectifier. Simple as that,nothing complicated required to safe it.
Bob, It reely is not me a new me will appear sometime soon. I no longer require that a wide angle lens be on the camera to take me all in.
Mark
Posted by Ted Costas (Member # 473) on 10-24-2001, 06:37 PM:
Hello all,Yeah, this was an "unauthorized" late night screening, where the individuals involved neglected to turn on the exhaust, causing improper ventilation... thus starting a fire.
This happened on Shrek on May 16th... Was there another more recent melt down, or was this the one you are referring to?
Yours,
Ted Costas
THX Theatre Alignment Program
Posted by Mark Gulbrandsen (Member # 72) on 10-25-2001, 06:02 PM:
Yo Ted,
Man, It took you along time to post that here. You e-mailed me about this a day after my original posting. I don't know for sure if we are talking about the same situation or not...how many others have melted down? (outside the laboratory)
MArk @ GTS
Posted by Ray Derrick (Member # 1001) on 10-28-2001, 01:32 AM:
This raises another interesting issue. Presumably a normally operating DLP projector will eventually start to have failures of individual pixels. Each such failure would I expect result in a little spot on the screen. I wonder how many such spots it will take for the cinema management to decide that it looks too awful, before they shell out the considerable sum for a new DLP panel.Mmmm!
------------------
Ray Derrick
President
Panalogic Corporation Pty Limited
44 Carrington Road
Castle Hill NSW 2154
Australia
Phone: 61 (0)2 9894 6655
Fax: 61 (0)2 9894 6935
Posted by Ben Wales (Member # 92) on 10-28-2001, 10:57 AM:
Yeah, this was an "unauthorized" late night screening, where the individuals involved neglected to turn on the exhaust, causing improper ventilation... thus starting a fire. -You would thought that there would be a Exhaust flow switch fitted to prevent this!, unless they had bypass this safety relay switch.
Or do they belive that this equipment is so advance that simple relay switches are no longer required.