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Author Topic: DA20 Problem Paul Gordon Jedi Master Film Handler Posts: 580 From: Ottawa, Ontario, Canada Registered: Aug 2005 posted 06-01-2009 10:23 AM                        Been running a used DA20 through a Cp55 with split surrounds, sound readers are new Ultra Stereo Dolby digital penthouse readers. Everything was working fine for about 4 months... but recently we lost all sound!. The processor is reading the sound but not sending it out to the CP55. It dosen't even drop back to SR as the processor thinks everything is fine. We hooked the DA20 to a computer and it seems to be reading the signal fine. Any ideas...? we think it might be a heat issue as thats the only factor that has changed, its hotter in the booth. Or has a board gone? Anyway we can't use it till we figure this out...we are now back to SR and DTS (when we get discs) Thanks  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-01-2009 10:57 AM                     The Cat 611A is likely your problem. Before going crazy...cycle the processor type select rotary switch around...it is possible it has gotten noisy. If you have any other DA20s...swap the Cat 611A...it probably will move with the card. Steve  |  IP: Logged Scott Christopher Film Handler Posts: 69 From: Adelaide, South Australia Registered: Apr 2001 posted 06-01-2009 05:40 PM                     This may be a ailly question.... Have you checked the cables between the units? possibly replace or swap them (or plug them back in ). I'd swap parts with another setup if possible (as Steve suggested).  |  IP: Logged Paul Gordon Jedi Master Film Handler Posts: 580 From: Ottawa, Ontario, Canada Registered: Aug 2005 posted 06-03-2009 07:21 AM                        I think its the Cat 611A... anyone have a spare one they would be willing to sell?  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-03-2009 02:42 PM                        Get any Dolby dealer to do a repair exchange. Louis  |  IP: Logged Paul Gordon Jedi Master Film Handler Posts: 580 From: Ottawa, Ontario, Canada Registered: Aug 2005 posted 07-22-2009 07:18 AM                        Da20 fixed... it was an over heating problem, nothing to do with any cards. Our Projectionist installed two fans one on the back, one inside. Now everything works fine. It werid that the Da20 has no fans in it... plus the heat sink is pretty small. Our booth is not air conditioned.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 07-23-2009 05:35 PM                     Not unusual. The DA20 makes a lot of heat. They don't do well in full racks, they really need at least 1U open above and below and do better with a 2U vented panel above and 2U free below. Or leave the front cover off, and (bonus) you can see the flashy lights as well! The usual rack fans that suck air in or out of the rack don't help since Dolby didn't put any vent holes in the front pane.  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 07-24-2009 11:27 AM                     Don't leave the front cover off, it's part of the screening, all sorts of RF oddities can escape!  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 07-24-2009 06:46 PM                        Knocking 50,000 watt radio stations off the air!! Louis  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 07-27-2009 01:54 PM                        I'm gonna take the cover off mine just to do that!  |  IP: Logged

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