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This is possibly similar to https://www.diyaudio.com/forums/chip…ow-volume.html

I’ve soldered up my LM3886 board and getting a hot chip (using a bad heatsink, if I use pliers to press it against a big heatsink then doesnt get hot).

The main issue I have is that it’s apparently outputting 0v at the output with no load connected, and PC line output connected as input with no input attenuation via a volume potentiometer.

I had previously built a veroboard version (minus the zener mute function, minus the thiele and zobel networks) and that used the same bad heatsink and worked and had no heat issues.

This is a different chip – when I get time, I will swap the chips to see if I have a faulty one.

I’m using a pcb this time for the new amp, components are more compact compared to veroboard.

Rgb1 on the schematic is just a bit of hookup wire that has not been soldered – intent to use 1ohm 1w resistor. This might be causing issues, although continuity seems fine on those points, it might be introducing noise.

Anyone able to point me to the right direction please?