Power supply where is the plus and where is the minus? And will nothing burn?

Hello!

At the beginning I wanted to say that I am rather a layman in matters of electronics and I am asking for your understanding (I searched the forum).

So this is: I lost the distortion power supply (guitar effect) and I wanted to replace it with another one, but I don't know which cable should be soldered to which PCB contact.

In the new power supply, I know where the plus and minus are. And in the old one I have blue and red cables, and the "coils" are painted the same. I know that the plus is usually red and the minus is black (in this case, probably blue), but if something was done in this power supply (distortion along with the power supply are borrowed), then if I connect the polarity to the distortion opposite to what they should be, will nothing burn there? and possibly I can change it?


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Regards and I am asking for understanding
Thanks in advance

If you give it the other way around, it will probably burn something.
The red cable is +
blue - if logically connected, although I encountered the connection that red was a downside ????? Some home-grown foreman was improving the factory like this ????
_

If you can see the "inside" of this distortion, you will easily see where the mass of the circuit is. This can be seen in electrolytic capacitors, where the minus is attached to the ground. It is mainly about power supply capacitors. In any case, the mass path is always the most significant, because it is the most, it connects to the ground of the input jack. One of the poles of the power supply goes to ground and this is a minus.

Also, if you have a meter, it will also show you where is (+) and where (-), i.e. if you connect one lead from the meter to e.g. a red cable, and the other to e.g. a blue (black) cable, then if the display shows only voltage then the red one will be (+) and if it shows the voltage with a (-) sign, then the red one will be a minus

kiesiu15 wrote:

Also, if you have a meter, it will also show you where is (+) and where (-), i.e. if you connect one lead from the meter to e.g. a red cable, and the other to e.g. a blue (black) cable, then if the display shows only voltage then the red one will be (+) and if it shows the voltage with a (-) sign, then the red one will be a minus

hmm .... it seems that I have a meter in the garage only or on broken (probably burnt) the power supply will it work?



PS Thanks for your interest

Since the power supply has burnt, unscrew it and check where these cables are going in the plug

Not so much where they go. If you find this meter, turn it on to measure ac voltage and check the voltage at the low voltage output pins. Or use an ohmmeter to test the input on the 220 side and then on the low side, and then you will see if the luck is damaged or the other circuit is on the side. secondary (low voltage) and then we will think further.

kiesiu15 wrote:

Not so much where they go. If you find this meter, turn it on to measure ac voltage and check the voltage at the low voltage output pins. Or use an ohmmeter to test the input on the 220 side and then on the low side, and then you will see if the luck is damaged or the other circuit is on the side. secondary (low voltage) and then we will think further.

Well, I measured from the exit side (behind these coils) and there was zero on each setting (I don't know how to set the meter ) But I don't want to repair the old power supply, but find out where to connect it.

So check where the cables in the power supply go - the blue and red ones. You will recognize it by the diodes or by the capacitor. If there is an electrolytic capacitor, it has a minus sign. This minus is connected to ground. One of the cables will also be connected to the ground.

And remember, buddy, that electronic capacitors are usually blue or black with a painted line at one of the terminals. This is a downside. If you have a plug with the so-called the hole is usually the Plus, and the outer tube is the Minus.

If you have a plug with the so-called the hole is usually the Plus, and the outer tube is the Minus.
But not always.

Gentlemen, thanks a lot overdrive works!

Thanks especially to kiesiu15 and ciek_slon :)


Edit:

I thanked me for my help with points :)



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