2. digital
  3. 1349795142

EE Minimax DAC repair

Hello Gang,

Although I don't consider myself a Newbie when it comes to electronics or fiddling with technology (been doing it for over 20 years), I seem to be scratching my head as to what went wrong with my OpAmp swap. As per Doug's article, I tried the OPA2604 (dual) in U1/U2 and AD797B (single) in U6/U7 then fired up my previously working DAC. There was little or distorted output from the unit, which I then shut off, inspected interior connections, and tried again; the unit would not start up. Based on visual inspection, there does not seem to be anything obvious wrong with the unit - the fuse and power line are fine (I tried another just in case) no "leakage" or "carbon trails" on the board or otherwise.

Would anyone have suggestions as how to troubleshoot / fix this or know of a qualified / reputable repair person that can?

Thanks in advance.
daveaudiony

Showing 1 response by morningstaraudio

morningstaraudio's avatar
morningstaraudio
154 posts
 
I'm just not sure what I can do for you. Tech repair is expensive,time and trouble shooting to find what went wrong in your op-amp swap. Then replacement parts and putting it all back together.

I have a couple new in box older DAC's not the DAC PLUS that I could let you have for my cost.Probably would cost about the same as doing a repair or a few dollars more. As I saved a couple of these just in case something went wrong with somebody's original DAC if my customers. It is an original DAC correct? Have to ask, did you purchase from me or second hand? Let me install the Dexa's though if considering throwing them in yourself.

Hope that helps,
Bill
More to discover