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Author Topic: Flickering on Barco 2k Projector Allan Riddelll Film Handler Posts: 33 From: msida , malta, europe Registered: Jan 2009 posted 04-06-2014 05:42 AM                     For some time now we have been experiencing some light flicker on our Barco Projector. Lamps used are Osrams and are well within their operating limits. Although the problem is not particularly serious, its more noticable on movies with daylight scenes and can be somewhat annoying. any suggestions to rectify the situation would be appreciated. Incidentally, no error codes have been generated and the rear status light is in its normal green.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 04-06-2014 09:00 AM                     What projector model, what lamp model? First step - install a new lamp. No flicker = bad lamp. Still flickering = possibly a projector problem (or another bad lamp). Note that Osram lamps have been troublesome in digital projectors - getting one to warranty hours without flicker or striking problems is considered by many to be unusual. The general consensus is that (currently - the situation may change) Ushio lamps are preferable, particularly high wattage (4kW+).  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 04-06-2014 10:09 AM                     Is it possible the flickering you are seeing is caused by the fan or the lens assembly being loose?  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 04-06-2014 10:37 AM                     Somtimes it's possible by looking through air vents on the projector housing or in the 'cracks' around access doors to determine if the flicker is actually originating in the blub or elsewhere in the projector. It helps if you have all the room lights off when you are looking. I did this recently to track down flicker in an NEC projector and it saved me the time & trouble of changing out the bulb since, in my case, the flicker was being generated somewhere else.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 04-06-2014 04:08 PM                     Where was it generated?  |  IP: Logged Allan Riddelll Film Handler Posts: 33 From: msida , malta, europe Registered: Jan 2009 posted 04-07-2014 08:12 AM                     Further to my previous initial comment. Projector is Barco DP2K 20C. Lamp is running at 4140w from a maximum of 4200 so is virtually at its full potential. Running time is 763 hours out of a 1100 maximum.  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 04-07-2014 11:05 AM                        Hi Allen Looks like the lamp is nearing the end of it's life - you are brave running an old lamp at such a high power. Is the projection angle flat ? - if not, or even if so, you might want to rotate the lamps perhaps 3x during their life. I am guessing that a new lamp will fix your flicker  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-07-2014 11:40 AM                     Stop using Osram and report back how many problems you have. I can't say it enough...if you use Osram, you should EXPECT problems...they are that bad.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 04-09-2014 08:23 PM                     Before we switched to USHIO DXL-40BAF, those OSRAM DP4000 bulbs were horrible since I could never get my thousand hours out of them-they'd be coal black with 700 hrs on them and I had a good 800cfms going up the stack.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 04-09-2014 10:39 PM                        Just to echo what the others are saying, we have been using Christie (now Ushio) 3K bulbs since day ones in 2D houses and Ushio 4K bulbs in 3D houses. To date I haven't had a single bulb that wasn't still working fine at warranty hours. A couple of the 4K bulbs have shown a very slight darkening of the glass, but no flickering or problems striking.  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 04-11-2014 06:32 AM                     Your problem is Osram. They are rubbish. I had three that came with my three Barco's and all three failed before their warranted time. I then went back to using Ushio's like I have done since the year dot. No trouble at all.  |  IP: Logged Mike Babb Master Film Handler Posts: 250 From: Norwich UK Registered: Jul 2002 posted 04-11-2014 08:45 PM                        If the bulb is out of alignment or hot spotted you can sometimes see flicker, and proper alignment will take care of it.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 04-11-2014 11:03 PM                     And if the lamp is pristine, in precise alignment, and otherwise perfect but bears the Osram name...it will do all sorts of things...though not always light.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 04-11-2014 11:14 PM                     ....even when you pop a new bulb in a lamphouse. They'll strike for one time then die. I thought I blew a PSG (igniter) in a 20C after putting in a new OSRAM, but decided to do a test trail with an old USHIO that I still had - USHIO fired up with no problems. Sent the OSRAM back for a warranty return. Did get a new OSRAM, but that one only lasted 800 hrs before hard and failed strike issues were coming to the surface. We gripe on the OSRAMS, but nothing can be as bad as the Philips bulbs in a SONY twin lens projector - the 320 unit. Philips XDC-4200S have the 700 warranty for usage in the twin lens units, but after 300 hrs, the lumens definitely drop to half of their brightness and the envelopes are quite dark by the time of the pull.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 04-11-2014 11:46 PM                        It is funny how things change with different configurations. We got great performance/life from of Osram 3K bulbs in a Xetron 35mm lamp house.  |  IP: Logged

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