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Author Topic: Christie projector interlock error Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 04-04-2018 10:18 PM                     I have had the airflow (vane) switches go bad. So far only the exhaust one.  |  IP: Logged Bradley J Sime Film Handler Posts: 68 From: Edmonton, Alberta, Canada Registered: Apr 2016 posted 04-05-2018 09:27 PM                     You should take the key OUT of the lock. If it jiggles while it is in there, that could set off the interlock.  |  IP: Logged Peter Foyster Expert Film Handler Posts: 102 From: ROLEYSTONE WESTERN AUSTRALIA Registered: Aug 2016 posted 04-05-2018 10:05 PM                     We checked out everything on the projector and there is nothing untoward occurring in the interlock system. As I had mentioned earlier, the lamp, which has done 150 hours to date, was running at about 42% capacity which we deduced was sufficiently low to cause it to go out without much provocation. Lamp power was increased to 75% and has made a huge difference to the light on the screen as you can imagine. LiteLOC has been disabled and we will manually adjust lamp settings as required. The logs have been downloaded and will be checked, however it is unlikely that it will reflect any sort of malfunction. All the temperatures are within spec and the projector is functioning normally.  |  IP: Logged Ioannis Syrogiannis Expert Film Handler Posts: 147 From: Reykjavík, Iceland Registered: Jun 2005 posted 04-05-2018 11:51 PM                     I had no recollection that a lamp could been set to 42 percent on a ZX. Then again, the leap from 42 to 75 percent is quite a big one. If it was me, I would first go for a 60 to 65 percentage and check if the issue reoccurs. Apart from that, if you find that the colors are washed out with the new setting, you could reduce the output of the light power a little bit by slightly "unfocusing". By slightly setting the z coordinates of the lamp away from the optimum output spot. It's not what you would call a typical course of action, and it's a waste of energy none the less, but when there is a shortage of xenon lamps (in order to properly replace with lower rated ones that have longer lives), that can be a last resort measure. Ideally, that should be done with a light meter in hand. If the 42 percent rating wasn't an issue with the recently changed settings of the lamp (due to the change) and gave you a well lit flat, it might be the case that you actually need a smaller rated bulb that would give you a longer life along with a somewhat smaller price.  |  IP: Logged Peter Foyster Expert Film Handler Posts: 102 From: ROLEYSTONE WESTERN AUSTRALIA Registered: Aug 2016 posted 04-05-2018 11:59 PM                     Well, the lamp being used on the previous projector, an NEC 1600C (may it rest in peace) was a 4K lamp set to about 72% and the light and picture were quite acceptable. The test pattern was run with the new settings, as well as some commercial content and it looked fine on screen. I will, however, take note of your comments and set the output lower if necessary.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-06-2018 03:29 PM                     42% (if at all possible) is certainly asking for trouble. While this shouldn't trigger an interlock error but simply make the lamp go off, I would most certainly use something in the 60% range as the minimum lamp current. - Carsten  |  IP: Logged Peter Foyster Expert Film Handler Posts: 102 From: ROLEYSTONE WESTERN AUSTRALIA Registered: Aug 2016 posted 04-06-2018 08:56 PM                     Running at 75% last night I had no problems and the light was excellent. Considering that we used to run a 4K lamp, I would not want to reduce it any further. Having said that, the screen is in dire need of a repaint and the light will dramatically improve when that is done for our next season.  |  IP: Logged

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