SOLVED: Problem with subwoofer

[KurtAgain]

The TRS-MS02 contains an old-school power supply with a transformer, i.e. not a switching power supply. See also the attached screenshot.


Best regards,
Chris

Wow, Yamaha can always surprise me. 

[overover]

Wow, Yamaha can always surprise me. 

But the Tyros2 already has a switching power supply ...


Best regards,
Chris

[KurtAgain]

Maybe Fran should just sell the copper from the transformer? 

[Fran MB]

... Although frequency does matter for a transformer to work as specified, it doesn't matter for the rest of the electronics inside subwoofer. Just after voltage is converted for example from AC 230V to AC 20V (that's transformer's job), it's immediately converted to DC voltage (by diodes) and capacitors make sure that any pulsation is flattened -I've just described how power supply works. Means, there's no frequency anymore. That is, amplifier inside subwoofer is actually working on DC power (=same as battery power).
The transformer is a simple copper coil where electricity (230V) runs trough that coil. If voltage is higher than allowed (110V) then coil starts overheating which damages the insulation and can finally lead to melting. The damage is not necessary visible to eyes. To put it simple, if transformer is damaged, it can become dangerous using it (even at correct voltage later). ...

Hello Bogdan, thank you very much for the detailed explanation. An interesting detail is that a damaged transformer may not be visible to the naked eye and that even in that state, it can continue to function (even with the correct voltage) but it can pose a serious risk and danger.

Thanks for your recommendations.

Fran.


Edit: Fixed quote and changed reply text to normal format by overover

[Fran MB]

... It *is* still at the top of the sticker, to the left of the sine wave. should be Either 100V, 120V, 240V (there is a "45W" directly underneath it)
Right above where it says
"YAMAHA CORPORATION"
"MADE IN JAPAN"

our T4 says "120V" with a sine wave next to that
"45W 60Hz"

It should be the same as what's on the subwoofer. Which do not have internal voltage switching, unfortunately. Only keyboards with external A/C adapters have auto switching, but who knows? I suppose it's possible the previous owner already swapped out the T3's, or even though I haven't seen it, maybe they released a Tyros somewhere that actually has a voltage range?

Not trying to scare you, trying to prevent you from damaging your gear!

If you check the manual
https://de.yamaha.com/files/download/other_assets/2/334142/tyros2_en1.pdf

and search voltage, it states specifically that the local voltage *must* match the designed voltage for the region, which is printed on the name plate (the sticker on the underside) and will specify 120v, 240v, etc same as the TRSMS02 that it's sold with. (They were not sold separately back in the day, they came as a package)

Hello Mark, thank you also for your safety recommendations to avoid damaging the Tyros 2. I have been using it since October connected to the 230V electrical network, without problems, (for the moment). The voltage it supports is what I indicated on the lower label, exactly the words "110-240V 45W 50/60Hz" I have attached a photo of the label.

Greetings!

Fran


Edit: Fixed quote and changed reply text to normal format by overover

[attachment deleted by admin]

[mikf]

Hi Fran
To use the quote function effectively, you type your responses outside the quote marks. It works better and more clearly than using bold text or italics.
And you can also edit the quote down to show only the relevant point (or points) you are responding  to rather than the whole quote.
This makes it easier to read and saves trying to work out what is being posted, what are responses and what is just copied text, and what is not relevant.
Understand you may have a language problem, but this is just about clear layout in a post.

Mike

Tip ... use the preview function to look at your post and see if it lays out and reads clearly before posting it.

[Fran MB]

 Hello,

Okay, I'll keep that in mind. I will study the application commands, since I have tried but I have not known how to respond using the forum format to respond using a quote.

Greetings

[Amwilburn]

Hello Mark, thank you also for your safety recommendations to avoid damaging the Tyros 2. I have been using it since October connected to the 230V electrical network, without problems, (for the moment). The voltage it supports is what I indicated on the lower label, exactly the words "110-240V 45W 50/60Hz" I have attached a photo of the label.

Greetings!

Fran


Edit: Fixed quote and changed reply text to normal format by overover

That is insane! I've never seen one with switching voltage (N.A. or H.K.) without an external transformer! Thanks for the photo! That's definitely not from N.A, odd that the TRSMS02 *was*!

[overover]

... Okay, I'll keep that in mind. I will study the application commands, since I have tried but I have not known how to respond using the forum format to respond using a quote. ...

Hi Fran,

It's not difficult to use the Quote function:

First, click on the "Quote" button (next to the "Say Thanks" button) of the post you want to quote. This opens a "Post reply" window and the quoted text is already in the text box.

If the quoted text is longer, you can (and should) shorten it (without changing the original meaning, of course). However, please make sure that the quote tags including the square brackets must be retained ([⁣quote author ...] and [⁣/quote]).

Place the cursor directly after the [/quote] tag (which marks the end of the quote) and tap Enter/Return twice to insert a blank line. Then write your reply text.

To check the result, click on the "Preview" button. You may have to scroll up a bit to see the preview. If everything looks as desired, click on the "Post" button.

Of course, if necessary, you can edit your post again later (then use the "Modify" button).


Best regards,
Chris

[BogdanH]

That is insane! I've never seen one with switching voltage (N.A. or H.K.) without an external transformer!...

So called "switching power supplies" are not that sensible about input voltage and so they usually work for 110-230V range without the need for manual setting -that's true at least power supplies that don't deliver a lot of power power.

Bogdan

[Fran MB]

Hi Fran,

It's not difficult to use the Quote function:

Hi Chris,

Thank you so much for the instructions.

Best regards.

[Fran MB]

That is insane! I've never seen one with switching voltage (N.A. or H.K.) without an external transformer! Thanks for the photo! That's definitely not from N.A, odd that the TRSMS02 *was*!

Hello,

Your welcome!

Greetings.

[Fran MB]

Hello,

In case anyone is curious to know the result of the test with the current transformer:

I have been using the TRS MS02 connected to 120v (with caution) for 3 days. Every day I have it plugged in for about two hours.

Today I had it connected for 5 hours straight. At the moment it works perfectly, I don't hear any strange noises, burning smell, smoke, etc.

I don't know if I can consider that the subwoofer works perfectly and that both the power supply and the rest of its components have not suffered any damage when it has been connected several times to the 220V mains and that it can be used with total guarantee and safety.

Thank you.

Best regards.

Fran.

[Amwilburn]

That's great news!

...But the next time any electronics give you a burning smell, immediately turn off and unplug and check the input voltage requirements!

[Fran MB]

That's great news!

...But the next time any electronics give you a burning smell, immediately turn off and unplug and check the input voltage requirements!

Thank you! In this case, the TRS MMS 02 did not smell burning, it simply made a loud noise and turned itself off, and at that moment I unplugged it... but of course, from now on I will check the voltage when I buy a second-hand device. Greetings!