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Author Topic: NEC NC2000C Randomly Shutting Down Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 07-22-2016 10:27 PM                        I'm researching an issue that happened today at our sister theatre. One of our NEC NC2000Cs just randomly shut down and went into standby. The projector did not throw any errors and there did not appear to be any heat issue. I have reviewed all the logs and I don't see any kind of errors, and no other events which might be related. This issue has happened once or twice before, but the timing is so random and spread out that it's difficult to draw any kind of links in terms of time of day, content, format, etc. I know projector shut downs are usually related to overheating, but there was no apparent heat issue with this projector. I called the Strong NOC and they indicated they are seeing things like this due to overloaded power girds resulting in a dip in amperage enough for the projector not to be able to keep the lamp lit. Anyone have any other ideas?  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 07-23-2016 12:11 AM                     Are the electronics on an UPS? If not putting them on one would eliminate voltage fluctuation issues.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 07-23-2016 01:07 AM                        The projector side is on a UPS, but not the lamphouse side.  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 07-23-2016 01:32 AM                     Assuming the UPS is working properly a power dip might cause the lamp to go off but the projector should not go into standby. Or am I misunderstand what the issue is. One other thing that comes to mind is a white power switch issue on the projector. They are known to have problems and maybe it once in a while looses contact interrupting the power momentarily.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 07-23-2016 04:28 AM                     I think Stephen hit the nail on the head on this one. If there is nothing in the logs a power problem would show up in the logs when the LPSU lost power...simulate it, Kill the LPSU power and see what shows up in the logs. But if that isn't there, look elsewhere. I'd say it is either the power switch or your UPS (or the connectivity thereof...make sure that the IEC cord is securely in and has that strain relief secure to keep it in.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-23-2016 10:08 AM                     I've never had a white power switch cause intermittent shutdown. In fact they have always gone bad stuck in the off position because of a little plastic rod inside that snaps off. I too would suspect the UPS before anything else, I have had a few UPS failures from allowing the batteries to go beyond their normal life span. You get one that shorts out and its gonna drive the UPS batty and possibly damage it. Tripp Lite recommends replacing batteries ever three to four years which I now do. In some of the Tripp Lites I have replaced batteries in, the batteries were already two years old when the UPS went into service, so they were six years old!! I have not had an LVPS power supply ever fail on an NEC. I have had one ballast failure in an NC-1200 though where it wouldn't reliably light the lamp. Anyway, I'd bypass the UPS first and eliminate that. There are commercially available Bypass Panels that allow one to safely plug everything in easily. All my locations have at least one of those panels as an immediate back up plan. Mark  |  IP: Logged Stefan Vogels Film Handler Posts: 48 From: Aarle-Rixtel, Noord-Brabant, Netherlands Registered: Jan 2010 posted 07-23-2016 03:28 PM                     In the communicator it is possible to program the projector what to do in case the bulb unexpectedly goes off. It is either cooldown or go to stand-by. It might be set to this last setting and so when the bulb fails the projector goes to standby.  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 07-23-2016 04:08 PM                     To me with this projector if the lamp is off but the projector electronics and fans are on is just a lamp off state. Standby is when the power has just been turned on and the button panel is active. One has to push the power button to take it out of standby to full power lamp off. I know you have to be in the above standby state to reset the lamp hours and they call it standby. Are we all talking about the same thing?  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 07-23-2016 07:14 PM                        Stephen, yes, that's the state I'm talking about. Projector has been powered on, but 'keylock' and power button have not been pressed.  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 07-23-2016 07:21 PM                     I would double check the connections on the projector side from the UPS. Try a different UPS or bypass it.  |  IP: Logged Timothy Eiler Expert Film Handler Posts: 126 From: Litchfield , Minnesota, USA Registered: Mar 2000 posted 07-25-2016 12:53 PM                         |  IP: Logged Bob Ezra Film Handler Posts: 75 From: Carbondale, CO, USA Registered: Apr 2001 posted 08-17-2016 08:34 AM                     Mark I just had a Tripp Lite SMX1500LCD Digital UPS System fail. Not a battery issue, it failed to turn on (just under 3 yrs old). Fortunately I had a backup on hand. I am wondering if you can elaborate on "commercially available Bypass Panels that allow one to safely plug everything in easily." Thanks  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 08-17-2016 09:23 AM                     They are commonly called "transfer switches" and are something we build into our automation systems now...if either the city or UPS power is there, the show runs. A poor man's transfer switch is to plug everything into a suitable power strip (I like the Tripplite UL600CB) and then plug THAT into the UPS...if the UPS fails, plug the power strip into the outlet that the UPS was plugged into and you are back up much faster than having to replug everything back in again.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 08-17-2016 10:21 AM                       Suitable is the key word here. Not some cheap outlet strip with a thermal breaker that will trip under load and leave you off screen.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 08-17-2016 10:57 AM                     We solve that on Doremis by feeding one of the redundant power supplies from the UPS, the other directly from mains. So the dual power supplies add another level of redundancy. - Carsten  |  IP: Logged

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