So.. I got an Aune X1 DAC/Headamp today - sounds great by the way - and because I am a curious guy, I opened the case to check the interior.
Because I am an idiot, I missed a small plastic ring when putting it back together, which shorted the heatsink of a TDA2030A in the power supply section to the chassis. Said TDA2030A was fried immediately, and a resistor next to it looks like it may have suffered, too. Here's a picture:
The small square of PCB contained the TDA2030A (the board on the photo says LM1875, which seems to be an equivalent part) which is now dead, I have ordered a replacement. Now R44 at the bottom seems to have changed color in the middle section as well. I'm tempted to replace it, too, but I'm unsure about value (colours) and power rating. To me, it looks like orange-something-black-brown, which should be 3x Ohms (maybe it's yellow, so 34?), but my multimeter reads about 3 Ohms only? Also, I'm unsure about the power rating.
So, if anyone could help me with these, I'd be very, very happy:
- What value and power rating does that resistor have?
- Why is there a "high power audio amp" (data sheet description of TDA2030A/LM1875) in the power supply section (It's not used as an audio amp - the chip is single channel and there's only one of them) ? Any guesses on what the chances of success are when replacing it? Is it likely that I have killed much more than those two parts?