Got one of these yesterday, my bad caps hunch was correct...
With the original plugpack SMPS, there was the usual SMPS cycling, with the rotary knob (encoder switch) LED pulsing dimly. Pops were heard in the speaker in time with the cycling.
I first took the back off to look for anything burnt in the audio amp and 78xx regulator section. All looked fine, so I tried the unit on a 10.8v regulator I fed from a 14v bench supply. The streaming device received power, booted, associated w/ router and began syncing up. Within seconds, it was playing.
Positively isolated, I now opened up the plugpack. Ewww! Nasty 'Gather' caps inside! One bulged, all smelly. And, there was literally icing on the cake, what with glue everywhere. What's even more amazing is that it ever worked at all. Plenty of loose leads and wire trimmings 'stuck' to the soldering. Ahhh... slave made goods.
I used Panasonic FLs on the secondary side. A 1000u after the rectifier, and a 470 after the filter (pi) choke. A Nichicon 10u 50v PW for the aux supply for the SMPS IC, and some Nichicon VZs for the primary filters.
There was no compound between the MOSFET and its heatsink, and they used a flathead(!) screw to attach it. Is it 'Deer' season?
For good measure, I also replaced the two 'funny' caps on the ethernet/power/amplifier board in the receiver.
I have to epoxy the case of the supply back together. I'll take some pix before I do...
Edit, pix added.
With the original plugpack SMPS, there was the usual SMPS cycling, with the rotary knob (encoder switch) LED pulsing dimly. Pops were heard in the speaker in time with the cycling.
I first took the back off to look for anything burnt in the audio amp and 78xx regulator section. All looked fine, so I tried the unit on a 10.8v regulator I fed from a 14v bench supply. The streaming device received power, booted, associated w/ router and began syncing up. Within seconds, it was playing.
Positively isolated, I now opened up the plugpack. Ewww! Nasty 'Gather' caps inside! One bulged, all smelly. And, there was literally icing on the cake, what with glue everywhere. What's even more amazing is that it ever worked at all. Plenty of loose leads and wire trimmings 'stuck' to the soldering. Ahhh... slave made goods.
I used Panasonic FLs on the secondary side. A 1000u after the rectifier, and a 470 after the filter (pi) choke. A Nichicon 10u 50v PW for the aux supply for the SMPS IC, and some Nichicon VZs for the primary filters.
There was no compound between the MOSFET and its heatsink, and they used a flathead(!) screw to attach it. Is it 'Deer' season?
For good measure, I also replaced the two 'funny' caps on the ethernet/power/amplifier board in the receiver.
I have to epoxy the case of the supply back together. I'll take some pix before I do...
Edit, pix added.
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