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Author Topic: Dolby cp-650 error help Laszlo Papp Film Handler Posts: 2 From: Budapest Pest Hungary Registered: Apr 2015 posted 05-23-2016 02:44 PM                     Sorry about my English,I'm from Hungary . I have a Dolby cp-650. It was worked in a cinema a long time ago but since 2 year it's gone wrong. I put it on warehouse but now I have some time to play with it. It's won't boot the screen has two black line. I try to remove the cat 790 card, check voltages, check psu capacitors but nothing's. I put some pictures https://flickr.com/photos/95733702@N07/sets/72157666283627483 Here If somebody have a good advice or trick or tips please tell me how to give alive this machine.  |  IP: Logged Allan Lyman Film Handler Posts: 35 From: COPENHAGEN, S /copenhagen,denmark Registered: Apr 2016 posted 05-29-2016 08:22 AM                     It looks like the flashrom card is defective.You will need a new one from Dolby,if they still provide them.I think its cat797  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 05-29-2016 10:29 AM                       They have been withdrawn from sale. They might be available as a repair/exchange unit but not sure. I do have various 650 parts I've obtained if you are in need.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-30-2016 10:24 AM                     although you've checked the voltages, I've seen that before and it was the PSU. Cannot be 100% sure it's your case as well though. Do you have a spare PSU around?  |  IP: Logged Kenneth Wuepper Phenomenal Film Handler Posts: 1026 From: Saginaw, MI, USA Registered: Feb 2002 posted 05-30-2016 10:50 AM                     Proper voltages are only one third of the story. Also check for "PARC"* on the buss as well as voltage regulation with changing functions of the system. * Old toll test term (crap)like noise  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 06-01-2016 02:05 PM                     We were looking for a new PSU from Dolby for one last week. Nope.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-01-2016 05:02 PM                       There are three vendors for the power supply "brick" that fits on the carrier sled that fits in the 650 frame. Two of the power supply vendors are still making the brick and I've placed an order for a quantity to do repair support in US and Canada. The Lambda version is long gone. Also, each of the sled type and related wiring fits only the power supply brand originally intended.  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 06-01-2016 06:04 PM                        Aren't these power supplies repairable? Is it really necessary to throw away and replace the entire unit when it fails?  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-01-2016 07:44 PM                       These little power supplies are not at all easy to fix or even disassemble. No schematics, and all components packed into a tiny space. I'm sure the right tech could fix some of them but the ones I've seen can fail dramatically and smell of smoke. If it were to be used in my own home unit I might give it a go but commercially not really worth the trouble, at least not for me.  |  IP: Logged Laszlo Papp Film Handler Posts: 2 From: Budapest Pest Hungary Registered: Apr 2015 posted 06-10-2016 07:19 AM                     i checked the power supply. its a little bit complicated board, with a lot of glued parts, but its seams to be ok. Probably the cat.797 rom card has a fault. i asked dolby to spare parts but they have only RMA process for RoHS compliant compatible cp-650Z and cat.797-1Z. Unfortunatly its not the Z version (its not lead free soldering parts, they don't do anything with this) So if somebody have some spare parts or a working cat.797 card or somebody can repair or re-flash this card please help me out. thx.  |  IP: Logged

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