开云体育

Does anyone have any recommendations for a decent long lasting replacement power supply for QY100. I bought one not that long ago on Ebay from Effects pedal pwoer Supplies and it's already failing intermittently?- ?cheap cabling I expect.
Any suggestions? - thanks Mark

i received mine with a 9vDC power supply, not original, and i think it says it's supposed to run on 12v. i don't know.
but i've never had any problems. as long as you have enough milliamps, it will be ok.
lol what voltage is it supposed to use?

For mobility, I have seen someone actually power a QY70 thru the DC port with a 5v USB power brick...though I personally would try to find something that could put out at least 10 volts DC so as to not stress the internal power regulator too much.

As for wall adapters, Yamaha brand is best of course is best, but an inexpensive one is not a big deal, it is always just hit or miss with quality ?on those. ?The big thick/heavy brick ones use a transformer and they tend to last but are unweieldy...while the smaller/lighter block ones are switching power supplies which are more efficient and smaller but somewhat more likely to fail over time (or be cheaply made). IMHO.
--
The Yamaha QY70 / Yamaha QY100 User Group??- A forum for the best band in a box synthesizer/sequencers ever created on the planet earth.

Favorite Quote(s):
? ? "The longest journey starts with the first step."?- Lao Tzu

QYs are well known for being pretty flexible on voltage, but I think the actual Yamaha branded one (PA-3C I think was the model number, but do double check me on that) was 10 volts, but anywhere from 9v to 12v should work solidly and consistently (just make sure the polarity is correct). ?I think any Adaptor that can generate 700ma at (at least) 9volts should provide enough juice (more is of course not an issue for amperage...it takes only what it needs).

You can probably go all the way down to 5v from what I’ve seen but I don’t know if I would push it that hard as the reliability might suffer (like you might increase the chances of having ?an error during a write operation and corrupt your saves for example). ?Plus I have no idea how many milliamps the internal regulator would try to pull at a lowly 5v.
--
The Yamaha QY70 / Yamaha QY100 User Group??- A forum for the best band in a box synthesizer/sequencers ever created on the planet earth.

Favorite Quote(s):
? ? "The longest journey starts with the first step."?- Lao Tzu

it's buzzing 'coz it's f***ed, but it won't damage your QY. not as if it's going to flatline and send
direct mains though to a 9-12v device.
i think switching PSU's are pretty good, lightweight. regretting giving away a good'un (12vDC)
with an rm1x i sold. it was great. have another one, tiny, delivers enough mA. think it's worth
seeking those out - portability, less weight. there's no magic afaik. the only PSUs you should
hold onto religiously are Boss PSA's for Boss and Roland products; there's some mojo in
there. you get hums and extraneous noise on old Boss/Rolands if it isn't the OG.(why?...)
got another rm1x, came with the original Yamaha PSU, and that thing is a brick - i know the rm1x
will work with any 12vDC of correct ampage, so i'm waiting to find another nice switching 12v.

Chances are the buzzing is because it is a switching power supply… most of the time this is because a capacitor or possibly an inductor (inductors tend to buzz slightly) might be starting to fail... ? but that could take a long time to happen.

?If it is a transformer brick type power supply then the transformer could definitely make a buzzing sound as well as it ages, but their failure rate is pretty low overall… However they certainly can fail from time to time as well. ?

@QYEdit ? I am far from an electrical engineer, but if I were to venture a guess then I would say Roland/boss might be incorporating a dual transformer noise reduction circuit.... ? or some other type of ground loop suppression circuit... but that is just a total guess... I think I have one around here somewhere and I would love to open it and take a look… But I hate to break the plastic welding... it kind of ruins it’s value. ?

--
The Yamaha QY70 / Yamaha QY100 User Group??- A forum for the best band in a box synthesizer/sequencers ever created on the planet earth.

Favorite Quote(s):
? ? "The longest journey starts with the first step."?- Lao Tzu

ah you have the modern version. the output cable on mine gave way. had to bin it :-(
i'm not sure it's the same as the old version - which you can, uniquely, open: it has screws.
cable on that went as well, but it was easy to open up and resolder, good as new now.

also have an older ACA version, unregulated. it's the type that gives 12v without load, dropping
to 9v once connected. this was for the old Boss pedal models. interestingly (...) it does not have
the same benefit/attributes as the regulated PSA version. (i wondered if it could have been the
original supply for sh101, apparently not, though, it is earlier.)

:-) which doesn't help us much for the QYs. as you say, i think they are pretty tolerant - but on
reflection i would like to be more certain about this (therefore shall check the manual...)