Is it possible to use an AC power adapter of a different amp rating for my Yamaha keyboard?

Question

I have a Yamaha keyboard for which the AC power adapter (transformer, the little black box) seems to be nonfunctional.

The original transformer puts out 700mA current. I found another transformer in my house that puts out the same voltage (12V) but 800mA current.

Is it okay to use that one to power my keyboard, or do I risk frying something?

Answer 1

Yes - as long as the voltage is correct, you can use one with a higher current rating.

Things that have to match exactly:

voltage - also if AC or DC

tip size

tip polarity (which part of the plug is +, which -)

Current  or amperage can be higher, as long as the minimum is met.