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Author Topic: Dolby CAT85C V.V.Tushit Vijay Film Handler Posts: 54 From: Tenali, Andhra Pradesh, India Registered: Oct 2009 posted 11-22-2010 09:47 AM                     I seen the parts list in Dolby CP50 manual for DOLBY cat85c . ANy one had the Schematics for DOLBY CAT85C. I am eager to get ready it any one had the PCB layout of the card. Regards, V.V.Tusith  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 11-22-2010 04:30 PM                     the schematic used to be in the CP50 CP100 and cp200 manual  |  IP: Logged V.V.Tushit Vijay Film Handler Posts: 54 From: Tenali, Andhra Pradesh, India Registered: Oct 2009 posted 11-22-2010 06:21 PM                     Thanks Sir. But some of the values were there . they are not given in schematics. they had given it as STD FET, STD PNP, STD NPN. Can you get me the values for that . and the layout given is Component side. How about the solder side of it. regards, V.V.Tusith  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 11-22-2010 08:57 PM                     VV, your best bet is to seek out an assembled CAT 85c. Why? First off, the "solder side" (or foil pattern for etching) has never been published/released by Dolby. Second, you'll notice some components labeled "AOT" which means that the actual value of that part is determined by testing and calibration. The time, money and small probability of success in getting a working, properly calibrated CAT85 makes this a very bad idea as a "build it yourself." The Component Engineering SG-1 LINK is still available and works very well.  |  IP: Logged V.V.Tushit Vijay Film Handler Posts: 54 From: Tenali, Andhra Pradesh, India Registered: Oct 2009 posted 11-23-2010 12:45 AM                     Thanks for your Suggestion but here i had only 5 Processor. And In India they wont pay correct amount for the tech support. So i am planning to do these things in a smaller way. To Serve them better . And make the audio perfect in the theater. V.V  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 11-23-2010 01:31 AM                     I guess there are several issues one is if one wants to be in an industry then there is a cost of tools involved The schematic is more or less complete since even making a noisy transistor PN generator many of the components will be field matched Also one does not need a 85c any noise generator that one can calibrate to the correct level for the processor in question and a simple extender /pinpoint insertion card will do  |  IP: Logged

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