Film-Tech Forum ARCHIVE: Help Needed: DOLBY DA 20 No Digital Sound

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Posted by Martin Daian (Member # 1779) on 07-21-2010, 10:52 PM:

Hi, i have in a problem with a Dolby DA 20 unit recent purchase , after i made all the installation on the both with a CP 65 processor, the DA 20 power up perfect and reads the soundhead information perfect, the rate display reads okey in 3 or 4 or 5 but the problem is that the vumeters green leds of the Da 20 not moves also not have sound in the output, i have opened the unit and try to replace cards with another DA 20 installed on this theater, when replace the CAT 673 card and powers up again the DA 20 the sound is on perfect and vumeters leds on the DA 20 moves okey, so the original CAT 673 card is not working, the seller of the equipment offer a solution buying a brand new CAT 673 from Dolby but i have the theater without digital sound and the owner is not very satisfied so i need to made all my efforts to see if will solve the problem with Cat 673, anybody will know about this problem with CAT 673 card ?, i know that also used in CP 500 processors, the Cat 673 have a reset switch button in front, i try to push and the unit be reseted but the problem persist, any help is very appreciated,
Thanks,
Martin