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Author Topic: Strong Xenon Power Supply Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 12-22-2005 05:15 PM                     quote: Michael Schaffer I had one or two module failures due to overheating of connections simply because cables inside hadn't been properly tightened at the factory. Yes... ditto for me.... I am still under the belief that you can't trust any factory when it comes to high current connections! I always reccomend checking all new rectifiers no matter who makes them so all cables are properly seated and tourqued down. Mark  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 06-10-2010 01:32 AM                 It has been 1630 days since the last post.  |  IP: Logged Dennis Klus Film Handler Posts: 1 From: tigard, or, usa Registered: Jun 2010 posted 06-10-2010 01:32 AM                     I know this thread is almost 5 years old but I wasn't sure whether to start a new one or just add to this one. I too have a Strong 62-80109 (compact xenon switching power supply) that failed recently (no output, red "module" led ON). I know it might be easier to just send it in for repair but the desire for self-sufficiency, tough times wanting to save money wherever possible, and a technical past tell me (with a little help) "I can fix this". I've read here that this is likely due to failure of the hard-to-find diodes or the igbt's. I've only pulled a few components so far and have found 2 bad diodes. I have a few questions though: 01) Where can I find schematics for this supply? The manuals on this site seem mostly to be operator/installation. 02) Is there any other supplier/distributor source for the IXYS diodes other that IXYS? I have seen DigiKey's online catalog lists these but not in stock and having a 60pc minimum order. I only need 4, maybe 8 for spares, not 60 nor 100 and do not expect to ever use 60/100. If these truly are only available from IXYS, are there equivalent diodes more readily available from someone else?  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-11-2010 02:33 PM                     The only real way to fix them is to install matched IGBT's and IXYS diodes. I match all the semi's I use in repairing these rectifiers and I have never had one of my rebuilt's fail yet. There are also commutation diodes as well as some zeners that also fail on occasion... depends on how the power devices break down. Matching, especially the IGBTs assures equal sharing of the load by all semiconductors. This is not something I believe was done in the units when they were built at the factory, the best they probably did was use parts from the same lot. In order to match these I buy 100 pcs at a time and use a Tektronix Curve tracer with MOSFET adaptor to do the job. I always end up with 6 or 7 pieces that will not match into groups of 4. Mark  |  IP: Logged

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