Keyboard power supply

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I just got a keyboard for somebody for Christmas, but it didn't come with a power supply. It's a Yamaha PSR-E313, and the recommended power supply is a PA-3B or 3C. My question is: Can I use one of those universal multi-power supplies?

Eoin Madsen

Probably - just make sure that:

• It can do the exact required voltage (V)
• It has the same or greater current capacity (mA)
• It's switched to the correct polarity for the keyboard
• It has a connector that fits the connector on the keyboard

Bullet points ftw. :pac:

Eoin Madsen

That is total BS. Current is drawn by the applicance. The current rating is literally just how much current can be drawn through the transformer before the transformer coils overheat. You should never get an underrated transformer.

If the applicance has a fault or short and draws too much current, a fuse will blow and the power will cut. That is the purpose of a fuse.

Paolo_M

sugarman wrote: »

You wont want to be doin that now, it can blow a fuse or to a greater extent even the circuit board if its too much.. Best try get one the same as the desinged current..

+ or - a couple mA wont do any harm tho.. say 100 tops..

But yea.. any universal should do the job..

The load (keyboard in this case) will just draw whatever current it needs. A fuse will only blow if there is a short somewhere in the circuit.
It's perfectly safe, in fact advisable, to use a power supply with a higher current capacity than what the load requires.

Edit: Dammit Eoin got there first. The information given by sugarman is incorrect.

Thomas_S_Hunterson

sugarman wrote: »

You wont want to be doin that now, it can blow a fuse or to a greater extent even the circuit board if its too much.. Best try get one the same as the desinged current..

It wont.

It doesn't really matter a long as your is above the minimum requirement in the keyboard spec.

/dang 3 posts saying the same thing in about a minute. gotta work on my typing.

OK-Cancel-Apply

Thanks for all the replies. I found a universal power supply in a drawer, capable of 12v 300mA. The Yamaha power supply gives out 700mA, so I guess mine's out of the question!