IQaudIO DAC+ headphone amp - no sound

[leveller]

[bouncingboffin]

I am having the exact same issue too on the same hardware. As the headphone IC should be directly connected to the DAC, I wonder if I have a faulty board. When I get a moment, I'll try the IQAudio board on a Pi3 and see if there it is a GPIO line controlling muting or some weirdness.

[rawdevice]

[bouncingboffin]

I found the problem by scoping the output from the PCM5122 to the TPA6133, as I assumed, if there was audio present on the line out then there has to be headphone out. The problem turned out to be purely mechanical, the 3.5mm socket is very cheap, the ground finger was pushed up and wasn't making contact with the headphone jack, A poke with a screwdriver and a blob of hot glue has sorted it. It's a shame the product is let down by a cheap headphone socket

[Lodewijks]

Thanks for sharing. I also spend hours on thinking "what am I doing wrong". And indeed, it is only a broken socket. Not sure how to repair, as if I shuffle the plug a little it sometimes gives a sound. For the time being I use the RCA from the pi-dac+ without the headphone socket.