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Author Topic: Mod 2C Blown Fuse Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 06-14-2008 07:19 PM                     After powering up my sound rack I noticed no lights on the front of my Mod2C processor. I found the 4 amp slo-blow fuse (20 amp DC positive voltage) had opened up. This is the first fuse the PS has ever lost in all these years. Should I be looking for another problem or was it just "it's time" to give up the ghost?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 06-14-2008 08:02 PM                     See if it blows again and then try removing a card at a time Sometimes one of the regulators on a specific board has failed  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-14-2008 08:17 PM                        "Sometimes a blown fuse is only just a blown fuse!" with apologies to Freud. Louis  |  IP: Logged Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 06-15-2008 03:24 PM                     Well since my first post I've discovered that the "Format" card is causing the fuse to blow. The rest of the cards have no effect. Any idea about the possible causes on the Format card?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 06-15-2008 03:37 PM                     probably the positive voltage regulator or a shorted opamp  |  IP: Logged Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 06-19-2008 05:23 PM                     As a follow up to this problem with the blown +20 vdc fuse....I discovered that the fuse was blowing with the PS removed from the main frame. I'm taking the PS up to Smart Devices to pick up a rebuilt PS tomorrow morning. Case solved.....Bad Power Supply.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-19-2008 07:29 PM                     These supply failures are pretty common. I can almost guarantee they will find a shorted bridge rectifier. A local chain that fortunately I don't have to service has these processors all over and the local tech usually finds a shorted bridge. Mark  |  IP: Logged Don Furr Jedi Master Film Handler Posts: 509 From: Sun City, Ca USA Registered: Nov 2002 posted 06-19-2008 08:29 PM                     Yeah Mark I think you're correct and that's the same thing the tech at Smart indicated on the phone today. That supply is at least 12 year old and this is the first trouble I've had with it.  |  IP: Logged

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