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Help with Theta Ds Pro Gen V

hello guys,

i am trying to repair the dac that has a very distorted output.
opening it i found that the transistors at the output were changed in both channels.

as it is impposible to find the original scheme, maybe for me wuold be important to know the exact model name of the last transistors at the output.
Is there someone who can help me?

Thanks a lot
afico
singleendedsingle
664 posts
 
I would Email theta. Diy forums have very few info about their products and how to service/repair them.
rrog
1,958 posts
 
I wouldn't count on Theta.
dgarretson
2,598 posts
 
Theta stopped supporting all legacy products after the company was sold several years ago. I am the original owner of a Gen Va DAC that fortunately still works.
jfeldt
16 posts
 
Bummer. I had some weird distortion with my Gen V as well that I eventually traced to my power cord not making a great connection with the ground. Once I was able to insert it flatter into the IEC socket, my problem went away, knock on wood :)

I won't be able to look inside to check transistor specs for another few weeks. How can you tell the transistors were changed, is it due to the soldering? Does your DAC have the "A" upgrade?
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