Mu-so. Ghost inside the machine.
Posted by: Doug E Walker on 01 January 2018
Hi everyone, happy new year.
I recently picked up a knowingly 'dead' Mu-so. Dead in that when powered on it shows no signs of life at all.
Having checked all the obvious points like power cable and fuse, I opened the case for a prod around. In case you're wondering, remove the 8 screws in the speaker arrangement plate and gently ease this forward. After that it's just a matter of noting which wire goes where for the speakers, removing the front WiFi board and unplugging the remote receiver plug. You then see the bass reflex tube, jog dial assembly, a bunch of wires for ethernet and usb etc etc
You then see a pair of legs..... and a tail!!! I'm not kidding.
The bass tube is removed quite easily.
The half melted 'dead' field mouse is then peeled away from the PSU heatsink. Absolutely brilliant.
The exit for the bass tube internally is directly next to the PSU, with it's associated transformers, mains conditioners and capacitors. He didn't really stand a chance.
The rear full length heatsink is also the mount for the two circuit boards, on the right is the PSU board, the left one is everything else (amps, DAC, DSP, CPU etc). There are also a couple of daughter boards. Between both is a rear WiFi receiver card, the Bluetooth card is stuck on the left side panel. To be honest, it's not very busy at all, the amp section is visually 'unremarkable'.
There is power flowing to both main boards, and to all speakers, however absolutely no signs of life at all. Not a sausage. Factory reset does nothing of course.
I'm pretty confident that swapping out both boards would make this a working unit again, it doesn't appear to be hard at all, 1 hour tops.
Does anyone have any experience with obtaining Mu-so spare parts in the UK? I'm aware that they're assembled in China, not Salisbury, so doubtful.
And yes, they'd be expensive too wouldn't they.