can't test the voltage on DC appliance

[fozzyfester]

Hi
I have a device (know as a mixer desk) that has a mains power lead into a transformer.
On the transformer it says input: 230V/50Hz/20W and Output: 2x14.8V/2x500mA
On the end of the plug there are 3 pins and I have tested them all with the multi meters set to 20V DC, and I can not get a read. But the device dose power up and work fine

 

[DetlefSchmitz]

Maybe the output is ac?

 

[fozzyfester]

an ac circuit board?

 

[DetlefSchmitz]

Have you tried to measure as ac?

 

[bernardgreen]

an ac circuit board?

Quite possibly the power supply to the PCB is AC and this AC is rectified, smoothed and regulated by components on the PCB.

 

[JohnW2]

I have a device (know as a mixer desk) that has a mains power lead into a transformer.
On the transformer it says input: 230V/50Hz/20W and Output: 2x14.8V/2x500mA

Could we possibly have a photo of this 'transformer' (including its label)?

Kind Regards, John

 

[Nozzle]

Could be AC

Or it could be the supply has shut down as it 'saw' no load. I prefer the former though.

Nozzle

 

[JohnW2]

Could be AC. Or it could be the supply has shut down as it 'saw' no load. I prefer the former though.

Agreed. That's why I asked for a photo, so we could hopefully determine whether the 'transformer' really is just a transformer (in the original sense of the word!).

Kind Regards, John

 

[winston1]

Transformers are AC devices. Do not expect a DC output.

 

[DetlefSchmitz]

Transformers are AC devices. Do not expect a DC output.

Very helpful... not.

 

[fozzyfester]

I get the cambera out in the next 5 minutes, but hear is the device in question, not a lot of info on this im afreade
https://www.gear4music.com/PA-DJ-and-Lighting/Behringer-XENYX-1002FX-Mixer/2A7

 

[winston1]

Very helpful... not.

Rubbish. It is true. I thought you were supposed to be a spark.

 

[DetlefSchmitz]

I get the cambera out in the next 5 minutes, but hear is the device in question, not a lot of info on this im afreade
https://www.gear4music.com/PA-DJ-and-Lighting/Behringer-XENYX-1002FX-Mixer/2A7

Well it says ac power in on the back.

 

[DetlefSchmitz]

Rubbish. It is true.

It may be true. But it is not helpful.

 

[fozzyfester]

hear is the transformer