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Author Topic: Choosing new projector Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 01-23-2019 11:56 AM                        But proactively replacing it every four years is only on the "smart maintenance" schedule for the 12C. On the 15C and 20C, the schedule tells you to replace the pump and check the fans for speed, noise and vibrations. Presumably their thinking is that if that fan fails in a 12, a significant risk exists that the light engine could get cooked before the lamp is shut down by overheat sensors, whereas in the 15C and 20C, the liquid cooling system does most of the work, and therefore the fan can be left until it dies.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-23-2019 05:24 PM                     That fan is not on the Maintenance-D list for the 12C (looking at it in Communicator right now). All it says is to check the speeds of all fans, like on the other projectors.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 01-23-2019 06:54 PM                        My apologies; you're right. The last (and only) time I did a four-yearly on a 12C was one that was encased in a blimp, 10 feet off the ground, and with nowhere to set the projector to work on or power it for testing within about 25 feet of its location (i.e. it would have to be carried a significant distance into the lobby to work on). This was actually after well over four years, and it hadn't received any maintenance at all at that time - at least if it had, it hadn't been documented (the bulb had done 4,800 hours!). Looking at my notes, I see that I advised replacement of the light engine cooling fan regardless of its speed reading (which was well within the normal range indicated in the Communicator window), because it was sounding suspicious when I visited the site a week earlier (the reason I was called was a flickering bulb), and if it failed in operation and the projector overheated and shut down, replacement would require at least three people, two tall ladders, and several hours; and that's not factoring in the risk of light engine damage. I was correct about no liquid cooling on that model, though.  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 01-23-2019 09:58 PM                     In my opinion the Christie 2215 has a better image than the rest. Think it is a combination of the .98 vs .69 chips and better lenses. The Barco C series which use the .98 chips is also very good. Not to fond of the 12c as it is easy to overheat.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-24-2019 08:06 AM                     The DP2K-12C is probably our most popular projector. The only time I see overheat situations is insufficient exhaust while running one of the larger lamps (2.2K or 2.0K) at the top of its range and not well focused (the heat is hitting around the integration rod rather than going through). The CP2210/15 is too small to dissipate its heat. The front of the lamp always has its coating flake off if running 1.8KW or larger. The 2210 (I don't think it was fixed in the 2215) also has a rainbow esq light leak around the lens. Servicing the 12C versus the 2210/15 is also no contest. Barco makes their projectors inherently more serviceable.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 01-24-2019 08:14 AM                        I have almost no experience servicing Christies, and so can't comment on their serviceability. However, as a general principle, it's worth pointing out that planning for the servicing of a projector should include considering the specifics of its physical installation. Servicing a projector that sits on a pedestal in a conventional booth is a very different task to doing one that is in a rabbit hutch/blimp enclosure, 10-15 feet above the ground, with only a 3-6 inches of clearance around and above it. A lot of our service work is in post houses and high end home theaters, and we frequently get pushback when we have to tell a customer that what would be a 30-minute task in a conventional booth is a four-hour call for three people in their installation, which involves lifting a 300-400lb projector down to the ground and then back up again. The architects who design these theaters tend to be focused on minimizing the amount of invisible, behind-the-scenes space in them, without, it seems, taking into account the higher running costs of the equipment installed in them that often results from this approach.  |  IP: Logged

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