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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    Last word for the night, after removing the defective diode I measured a the frequency and duty cycle at the two terminals (boxed in red) with respect to the DC GND (circled in red). I observed a Duty Cycle of 60Hz with intermittent spikes +80Hz and and a duty cycle of 29.x% wherein the X...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    Follow up - removal of the freshly burned resistor has restored 120VAC to the bridge diode inner pins and the outer pins report 160VDC. I would prefer to install a fuse before doing more work, though the likelihood of it burning out is quite high as the damage has not yet been diagnosed. I have...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    Hi folks, Sorry for the delay - it's been busy at work and I've been trying to sort out my home office. First thing to do, if you have a precision power supply, is try to power up the speaker with the 24V rail. Provide 24V 0.2A to the six capacitors, (+) is center, (-) is the exterior also...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    I've had a busy few days - if you're willing to stick around till the weekend I will happily show you where I got.
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    I put a fair bit of money into mine. I wish I had a schematic and gerber because I kept finding other problems up-stream. I can power up the speaker with a 24V supply, but the AC to DC is not reliable.
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    I am back to report that replacing those MOSFETs did not have the desired effect. I was probing around the working board and discovered that the 75 Ω resistor (incorrectly called 750 above) is NOT what I thought it was. On the working board, the resistance across this resistor is close to...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    Follow up: I have a working and broken speaker with the same PCB now which is great for testing and identifying problems. So the visibly damaged diode rectifier, 750 Ohm resistor, and FAN chip have been replaced. When I plugged in the speaker, the 750 ohm resistor blew up again. The diode is...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    I've made some progress actually, the Bridge Rectifier was burned as well. Part Identifier "China 1409J GBL06" with spec "DIODE, BRIDGE RECT, 3A, 600V" according to a service manual previously cited in this discussion. This exact part is manufactured by Vishay (GBL06-E3/45), please note that...
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    BOSE Solo 10 Help - No Power Up - Pics + PCB Part List

    Hello Folks! Sorry to perform post necromancy, but I am diagnosing my own Bose Solo and need only minor assistance you can provide from your own intact units: This unit does not power on or react. Initial inspection at the inputs to the Bridge Rectifier (BR1201) looks good 120V. There is no...
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