my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Eiki xenon unstable

Author Topic: Eiki xenon unstable Bruce McNaughton Film Handler Posts: 27 From: Wandin VIC Australia Registered: Sep 2004 posted 07-30-2019 08:40 PM                        I have an Eiki XE300SL The xenon fires up and runs but it fluctuates noticeably. I have run it on a couple of rectifiers with the same fluctuation evident. It appears that the flame is dancing around on the annode surface. Can anyone advise a solution?  |  IP: Logged Frank Cox Film God Posts: 2234 From: Melville Saskatchewan Canada Registered: Apr 2011 posted 07-30-2019 10:16 PM                        I would say that it's either under-powered or a bad bulb.  |  IP: Logged Bruce McNaughton Film Handler Posts: 27 From: Wandin VIC Australia Registered: Sep 2004 posted 07-31-2019 06:14 AM                        No, neither. Correct voltage and current, new bulb. I have this issue with any bulb that I install  |  IP: Logged Paul Finn Film Handler Posts: 41 From: Bay City, MI Registered: Jan 2019 posted 07-31-2019 08:25 AM                     Is there an arc stabilizer magnet missing or that has been moved out of position? I assume there have been no wiring changes and the DC polarity to the lamp is correct? It may also be helpful to measure the AC ripple in the lamp DC current under load. Paul Finn  |  IP: Logged Bruce McNaughton Film Handler Posts: 27 From: Wandin VIC Australia Registered: Sep 2004 posted 08-01-2019 12:18 AM                        Thanks Paul The magnet is in place. Polarity correct. I cannot measure the ripple but the Strong rectifier that I am using gives a perfectly stable result on another projector  |  IP: Logged Helmut Maripuu Film Handler Posts: 25 From: Västerås Västmanland Sweden Registered: Mar 2004 posted 08-01-2019 03:33 AM                     How old is the rectifier? maybe time to replace capacitors. The heat from the diodes damages the capacitors.  |  IP: Logged Bruce McNaughton Film Handler Posts: 27 From: Wandin VIC Australia Registered: Sep 2004 posted 08-01-2019 09:57 PM                        The rectifier is in perfect condition, running all other xenons with rock steady stability  |  IP: Logged Jonathan Wood Expert Film Handler Posts: 206 From: Oxfordshire, United kingdom Registered: Jan 2008 posted 08-06-2019 04:20 AM                     Hi Bruce Are the bulb connectors ok ? No arcing build up causing poor connection ? Jon  |  IP: Logged Bruce McNaughton Film Handler Posts: 27 From: Wandin VIC Australia Registered: Sep 2004 posted 08-24-2019 07:21 PM                        Yes all connections are solid  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 09-02-2019 09:58 AM                        So if these all check: *replacing the existing bulb with a new bulb in this projector and and the new bulb exhibits the same problem *this rectifier works without issue with another bulb in a different lamphouse with no issue *all connections are tight and show no signs of any kind of physical anomalies in the errant projector *while you can't test for AC ripple, you say the the rectifier shows no problem in another identical projector/bulb size setup, but is it powered by the same AC source in the known good operating setup? If not, check the ground integrity of the outlet that the rectifier is plugged when it is powering the bulb in the problem projector. If all the above seems normal, then definitely check the stabilization magnet in the problem projector. Be sure it hasn't lost its flux density or that it has somehow been compromised. If you have been able to test the bulb and the rectifier together (you have a second projector or on a test rig setup?) and the two are functioning without a wandering arc, then look to the problem projector itself for the problem. What about air flow. Is the bulb being cooled properly in the housing? Check the air flow around the bulb in the test projector (where the bulb is operating correctly) against the same in the errant projector. Best of luck.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.