[slim] Another Freebie
They Might Be Giants has done it again for a short window. John Henry Demos is free for a couple of days. https://tmbgshop.com/ Main system - Rock Solid with LMS 8.2.1 on WHS 2011 - 2 Duets ( both WiFi, farthest unit gets 60% signal strength and always works since new power supply) and Squeeseslave Cabin system - Rock solid with LMS 8.2.1 on Win10 Pro - 1 RPi 3 Model B (WiFi) /Hifiberry DAC+ Pro/PiCorePlayer and Squeezeslave Squeezebox Boom - "At Large" player around both home and cabin Headphones and car - Android phone/Bluetooth w/full library on MicroSD card - PowerAmp music player app (similar to Material Skin) w3wilkes's Profile: http://forums.slimdevices.com/member.php?userid=22973 View this thread: http://forums.slimdevices.com/showthread.php?t=117155 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
Re: [slim] New approach to dead Boom / SB3 (Classic) / Transporter
I managed to dig out an old thread, complete with contributions from me on the last page. :) It is C16 and C20 apparently. https://forums.slimdevices.com/showthread.php?71914-SB3-volume-output-lower-on-left-than-right-channel Glenn2's Profile: http://forums.slimdevices.com/member.php?userid=19286 View this thread: http://forums.slimdevices.com/showthread.php?t=117140 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
Re: [slim] New approach to dead Boom / SB3 (Classic) / Transporter
Glenn2 wrote: > Absolutely. Some voltage regulator circuits require that you use low > ESR or ultra-low ESR capacitors, while some require that you DON'T. > Often you need a mixture of types. Many linear regulators will > oscillate if you stick an ultra-low ESR capacitor across their outputs. > Who knows what Logitech used originally and if they only used one type > across the board. Does anybody know the manufacturer and type of the > capacitors? And did Logitech change this when they took over. > > My (Logitech) SB3 is still hanging on and in daily use. For half of its > life it's been plugged into a remote controlled mains socket, so that > it's only powered up when I'm actively using it. This should help > preserve both the electrolytics and the VFD. > > As a side note I did have to replace the caps in the audio section a few > years ago when I realised that the analogue outputs didn't work anymore. > That's was a bit OCD of me really as I don't even use them, I connect > it to an external DAC! The caps between the internal DAC chip and the > op-amp were back-to-front but they did agree with the silk screen. The > op-amp input is biased to a higher voltage than the DAC output so the > positive side of the caps should face the op-amp, which they didn't in > my unit. Interestingly one of the caps between the op-amp and the RCA > sockets was also open circuit yet those are not the wrong way around. I > replaced all 4 signal path capacitors and normal sound was restored. It > doesn't fill me with confidence about the state of all the other caps on > the board, but any temptation to replace those whilst it is still > working is receding fast after hearing these horror stories! Logitech used Panasonic, and all Slimdevices SB3s I have seen (which are quite a lot) also used them. Not sure about the series though, I have found FC, FK, FP, FT, and HB, and it seems to vary a bit from lot to lot. Certainly not the worst choice they could have made, still if they are reversed that's a good explanation for their failure. I have not a lot of knowledge around these things, which of the capacitors are reversed in your opinion? I can say for sure that the silk screen has been the same forever, and it could point towards a design fault that the capacitors are reversed in the silk screen as well as in the pick-and-place process. Even if you are not using your DAC, the Xilinx chip is still talking to it, and if the DAC power supply is unstable thanks to dead capacitors, that will bring the entire system down and have it do a reboot. Hence, no matter what output you are using, the DAC needs to be happy so things are working out. It certainly helps a lot to power the SB3 only when needed, as you say, for the display as well as the capacitors. It's a bit less flexible but should be a concern, now that we are thinking a lot more about our consumption bills. PN me if your Boom / Classic / Transporter display has issues! Blog: https://www.blogger.com/blogger.g?rinli=1=1=5053304027701850753#allposts JoeMuc2009's Profile: http://forums.slimdevices.com/member.php?userid=23131 View this thread: http://forums.slimdevices.com/showthread.php?t=117140 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
Re: [slim] New approach to dead Boom / SB3 (Classic) / Transporter
alfista wrote: > Anecdotally, I've seen some weird issues in some consumer electronics > when I replaced electrolytic caps of questionable pedigree with the best > stuff I could get my hands on, seems like the design was tuned for the > low budget components. Absolutely. Some voltage regulator circuits require that you use low ESR or ultra-low ESR capacitors, while some require that you DON'T. Often you need a mixture of types. Many linear regulators will oscillate if you stick an ultra-low ESR capacitor across their outputs. Who knows what Logitech used originally and if they only used one type across the board. Does anybody know the manufacturer and type of the capacitors? And did Logitech change this when they took over. My (Logitech) SB3 is still hanging on and in daily use. For half of its life it's been plugged into a remote controlled mains socket, so that it's only powered up when I'm actively using it. This should help preserve both the electrolytics and the VFD. As a side note I did have to replace the caps in the audio section a few years ago when I realised that the analogue outputs didn't work anymore. That's was a bit OCD of me really as I don't even use them, I connect it to an external DAC! The caps between the internal DAC chip and the op-amp were back-to-front but they did agree with the silk screen. The op-amp input is biased to a higher voltage than the DAC output so the positive side of the caps should face the op-amp, which they didn't in my unit. Interestingly one of the caps between the op-amp and the RCA sockets was also open circuit yet those are not the wrong way around. I replaced all 4 signal path capacitors and normal sound was restored. It doesn't fill me with confidence about the state of all the other caps on the board, but any temptation to replace those whilst it is still working is receding fast after hearing these horror stories! Glenn2's Profile: http://forums.slimdevices.com/member.php?userid=19286 View this thread: http://forums.slimdevices.com/showthread.php?t=117140 ___ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
