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boojumliussnark @lemmy.world
Posts 1
Comments 7
Lemmy is like a public library of the internet: it's one of the few places where you can exist without the expectation of paying either through watching ads or through direct payments

  • Even if we were to accept that at face value, it does not change the fact that libraries are paid for by taxes, which was my exact statement. My point was not what you seem to interpret in any case. My point, if any, was that we get a lot of really cool stuff for taxes... And also that, as most other things, they are not actually free.

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    Lemmy is like a public library of the internet: it's one of the few places where you can exist without the expectation of paying either through watching ads or through direct payments

  • Libraries are paid for by taxes

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    Quack rule

  • I would say this map is wrong. The Danish Rip, Rap & Rup, is just as much onomatopeya as the Italian or Dutch.

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    Mission MS 200 Schematics / Repair pointers

  • Thanks again for looking at this!

    The NTC meassures very low ohm, in circuit it's around 14 ohm.

    The markings on the "receiver" board are: +27v, gnd, -27v and "mute".

    I would like to try to do some "divide and conquer" debugging, as the total number of components is rather low. I would like to try to eliminate the different "blocks". Like I can connect it up, and measure the voltage after certain "stages". Maybe after the inrush current limiter? To my very limited understanding that should be right at the end of the AC block/stage? Maybe dividing the board into 3 or 4 stages like this I could start to narrow down the issue?

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    Mission MS 200 Schematics / Repair pointers

  • I am guessing the MOV is the component marked MOV on the board, its markings are: TVR 07471. Can I test this "in-circuit, or must I de-solder it to test it?

    In-Circuit I measure around 470kohm

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    Mission MS 200 Schematics / Repair pointers

  • Thank you for taking the time to help out :-)

    I have attached a couple of images. I figured the PSU is the issue, since there is 0v between the black lead and the other leads on the connector to the other parts - the one in the bottom right corner on the attached overhead.

    I measured the "MF 72 10D13" for connection, and it is OK. I then measured the two large capacitors (in-circuit) and they both come out fairly close to the 390uF they are rated as. I also tried to measure what I think are 4 transistors attached to the heatsinks. But am uncertain of the results there, as I can't follow enough of the circuit to understand the results - and I am not even sure they are transistors - much less if they are npn or pnp :-) They are marked as Q1, Q2, D6 and D7 on the board.

    When visually inspecting the board and components, the only thing I thought, might be "odd" was the "browning/darkening" around the circuitry near where "R1" is located.

    • Ask Electronics @discuss.tchncs.de boojumliussnark @lemmy.world

    Mission MS 200 Schematics / Repair pointers

    I have a Mission MS 200 Subwoofer where the power supply has stopped working. I was quite happy with it, and would like to try to fix it, also I don't have the money for another. I have taken it apart and have narrowed the fault down to the PSU. I have visually inspected the solderings and components, and nothing obvious is wrong. I am not good enough to be able to reverse engineer the board, and was hoping there might be someone here with access to a schematic? Failing that, any pointers on where to maybe do some in-circuit measurements to narrow down which part(s) might be broken, would be very highly appreciated!

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    Kingpin tweeted this. Gomer Pyle tweeted this. That cockroach man from MIB tweeted this.

  • Pigs can't look up? Hahaha WTF? Who came up with that?