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Author Topic: Cat.700 power supply humming Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 07-07-2004 05:09 AM                        I just had 2 of these fail, one could be saved by soldering the wires which had blackened in the infamous molex connector directly to the board. After the same operation, the other works now too, but it still makes a loud buzzing sound. I couldn`t locate which of the parts on the board makes it. According to the projectionist it started smoking at one point, but there is no visible damage. Both the humming and the smoking were apparently there before the operation.  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 07-07-2004 09:29 AM                    Sounds like it could be a transformer issue within the power supply but that is just a thought. Would have to take it apart and see where the smoke and hum could be coming from.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-08-2004 12:02 AM                     Oh no! You didn't let the smoke out???? Now ya got to get it back into where it came from. How ya goin to do that? Joe wants to know..... The P.S. doesn't use a transformer per say since its a switching supply and runs at high frequency. Mark  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-08-2004 09:06 AM                     I thought in california you were not allowed to smoke indoors anymore  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 07-08-2004 12:57 PM                    Jesus, does anyone have any real answers to his problems. If not then I guess you should call Dolby and ask their advice. Oh and smoking is banned inside public buildings in our city.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-08-2004 08:58 PM                     Its TTRI for that power supply... best known as Time To Replace It. Mark  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 07-09-2004 02:12 AM                        I ordered a repair exchange since it looks like it isn`t a part that would be easy to isolate and desolder on my kitchen table. In the heat of the summer season, we don`t want to go without digital for too long.  |  IP: Logged

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