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So I took a chance on a craigslist ad. Almost free. CAL Audio Labs Sigma DAC sold for parts/not working.
Went through it looking for any obvious problems. Checked voltages at test points, heater, plate etc. All good but still no output, no digital lock.
Anyone have any idea how to troubleshoot this classic DAC?
Thanks for your thoughts CT. I am well equipped for DAC's. Really just bought this to try to save it from the landfill. Figured if it was Power supply or Analog related I could get it running. Digital side I would be helpless.
Really was hoping some former CAL connection might chime in. Oh well, kept me busy for a few hours!
I had a $500 DAC fry with a power surge. I took it to a Audio Repair shop that I had great luck with and they tried to fix it. They had the problem isolated to a PCB with a Chip on it. To get the new board and have it fixed would have resulted in a charge of around $250...
They suggested that I use the money to buy a used one, or put the money towards a different DAC (which I did - Good Suggestion). I still have the Non-Working DAC that I might use for parts as I have another working DAC just like it. This particular model of DAC was very sensitive to voltage changes.
I think, you'll eventually run into a Faulty part, which will cost more than the DAC is worth, if you can even get it. There are a lot of good DACs out there for under $750 today. I think this is the line of thinking that the Craigslist Seller went down. - Just my 2 Cents worth.
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