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Author Topic: LP Associates Xenon Power Supply Fault Matt Close Expert Film Handler Posts: 226 From: Hervey Bay, QLD, Australia Registered: Sep 2001 posted 04-15-2002 08:19 AM                        Does anybody have a manual and/or advice for a LP Associates Xenon power supply MODEL 8532-2 .... we have one that is faulty. It throws the circuit breaker, and gives a loud 'pop' sound from the recitifier, also sparks from around the diode block area... any ideas anyone? ... I can't 'see' anything that 'looks' faulty. thanks  |  IP: Logged Pat Moore Master Film Handler Posts: 363 Registered: Mar 2000 posted 04-15-2002 08:31 AM                     Sounds like shorted diode(s) are the problem. The diodes may not "look bad" but if you take them out of circuit and test them with a meter, chances are they are shorted in both directions. Pat  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 04-15-2002 11:27 AM                     Yep, sounds like shorted diode(s).  |  IP: Logged Matt Close Expert Film Handler Posts: 226 From: Hervey Bay, QLD, Australia Registered: Sep 2001 posted 04-15-2002 06:28 PM                        If only it was that simple ..... The diodes all check out fine ..  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 04-15-2002 07:20 PM                     You undid each diode and checked them individually? Then they all checked ok? You could have a bad filter capacitor or bum contactor.  |  IP: Logged Art Averett Film Handler Posts: 14 From: Orlando, FL Registered: Mar 2000 posted 04-15-2002 08:07 PM                     I had the same thing happen to me. I use LP Associate power supplies for the Skytracker skylights. The only thing is that they use a remote ignitor board and it had a problem with that. I did change out the diodes on positive side and the negative side. Just becareful on installing diodes on the negative side. Make sure that they are the reversable type,ie, the arrow printed on the side of the diode is printed showing the reverse direction. If any of the diodes were shorted, you would hear a loud buzzing sound coming from the transformers and the output voltage dropped quite low. I know because I had a power supply for a seven KW XENON lamp do this to me. The circuit breaker did not trip, and it too, was made by LP Associates. Good luck, Art  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-15-2002 09:45 PM                     Check the boost supply it can give grief Also check for the source of the sparks closly as the fault is probably in that area  |  IP: Logged Jon Bartow Master Film Handler Posts: 287 From: Massachusetts Registered: Nov 1999 posted 04-16-2002 03:07 PM                     just for kicks, replace all of the diodes anyway, just too double check if they really are good. It is possible for a diode to chech out fine with a meter but fail under load. (Some of the Strong rectifiers have done this to me several times )  |  IP: Logged

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