Hey guys, having a bit of an odd problem. In my 4 channel 9k pre, i have 3 channels working but one not. So i went hunting around, checked that it was getting the 18vs and 15vs, getting audio to the board etc. Getting all of that, i looked at my solder job and i didn't see any shorts or anything like that, so i proceeded to check that i'd mounted all the ic's properly.
I touched IC24 which looks to be the output IC and it was hot, i mean heatsink on voltage regulator hot. Now this can't be good. Can anyone think as to why this may be happening?
I checked the voltages and i didn't see anything unusual there, but maybe i missed something.
Any help you could give would be awesome. Or even if there is a way to test that the audio is getting through all up until the last chip that'd be helpful.
Oh yeah, also, i switched out the chip so unless i have 2 bad chips, its not that.
Also if it means anything the transformer is acoustically buzzing VEERRRRYYYY quietly. The other channels are fine, just thought i'd mention that.