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This topic comprises 2 pages: 1 2
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Author
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Topic: Barco DP2000 Bulb Shutting Off During Show
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John Roddy
Expert Film Handler
Posts: 114
From: Spring, TX, United States
Registered: Dec 2012
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posted 12-30-2015 12:55 AM
This type of issue has been one of the biggest, most annoying problems I've had to face at my main site (mostly DP1500, with a few DP2000). In ourc case, the problem was due to the liquid cooling circuit clogging up. This caused one of the blocks to start heating up to warning levels (which throws a yellow tail light). If it gets even slightly hotter past that, red tail light and instant lamp-off. For us, we got an error of Microsoft-level helpfulness simply labeled "Lamp is off due to an error." Check the projector logs for any mention of block or DMD temperatures.
The fix for it is pretty simple. You need the coolant service kit from Barco and a good supply of coolant. The manual's instructions seem to list a "workaround" instead of a permanent fix though. What I've been doing is separating the engine circuit from the heat exchanger circuit, and then force backflushing both of them. Go opposite the coolant flow direction, and pump air through the lines. Then take some new coolant, and run it through until there isn't any discoloration. The bucket I pump it into usually ends up laced with blue powder crap. It's disgusting. Do that to both circuits, fill them as best you can, then reconnect and do a full bleed. Every time I've done it that way, the projector never showed any trouble ever again.
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John Roddy
Expert Film Handler
Posts: 114
From: Spring, TX, United States
Registered: Dec 2012
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posted 12-30-2015 01:59 PM
Once the lamp has been running for about 15 minutes or so, pull up Communicator and watch the temperatures of the blocks and DMDs. Red, Green, and Blue should all be about the same (note that block and DMD temperatures will differ, but RGB for each should be really close). If all of them get very hot together, then that's likely intake air being restricted. The pump moving the coolant through the loop is enough to at least normalize the temperatures between everything, even if it can't lower it. When one starts cooking up faster than the rest, that's when it's the loop itself that's restricted.
Every time I've ever seen "Lamp is off due to an error", the cause has been an overheating block or DMD. And every time that's happened, it's been a clogged cooling loop. Of course, I have no idea what restricted air intake would do. Our site was always pretty good about keeping the airflow pure and open.
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