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Author Topic: Dolby CP55 Fault Michael Harlow Expert Film Handler Posts: 170 From: Faversham, Kent, UK Registered: Jul 2002 posted 09-06-2004 06:25 AM                     Gents, My CP55 has developed a fault where by powering up at the start of the day it remains in bypass mode, after a while (10mins or so) it will revert to normal operation. It has gone to bypass mode a couple of times during a show. I have replaced the 3 relays on the back of the unit and also reseated all of the cards. Any ideas before I call for help? Thank you Michael.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-06-2004 07:32 AM                     Upgrade your Cat 249 to a Cat 249A. This is the power regulator card. If you have more than one CP55 (or CP65)...swap the Cat. 249 and see if the problem moves. Steve  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 09-06-2004 06:49 PM                        We had a similar problem recently with a CP65. One of the cards (Cat.No.250) had not been properly seated. Reseating them seemed to cure the problem at first, but it turned out that the connector on the backplane had been slightly damaged by the bad contact, so I exchanged the backplane. The r/e wasn't too expensive - a little more than $200 - better than losing sound on a Saturday night.  |  IP: Logged

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