Burning hot synth! (literally)

[Cloudschatze]

This has nothing at all to do with comptuers, and is probably a Laust question besides...

I discovered last night, after burning my hand on the back of it, that the JD-990 I bought second-hand a couple years ago is an AC 100V unit (probably Japanese).

Fixing this is easy - Inside the unit is a universal transformer. I'm just going to move the hot lead from "100V" over to "120V."

What I'm wondering, however, is if any permanent damage may have been done to the synth after using it for so long on ~120V current. I've never noticed anything out-of-the-ordinary, other than the excessive heat... but then, I've no basis for comparison!

Thoughts?

[glendower]

I'm going to guess that it converts the voltage to DC internally, so there's a chance that any potential damage will be limited to the internal transformer... I don't know if my wild swinging will assuage any anxiety... but as long as it's working, I guess you're doing okay

[Laust]

120V is not _that_ much over 100, but without knowing the details of the synth's innards, it's hard to say if anything has been permanently damaged (and even then, I could only guess ). It has probably shortened the life of some of the components (like the capacitors), but that's it.

Too hot to touch does sound rather nasty, though!

I'm inclined to go with glendower, in thinking that if there is any damage, it is limited to the power supply section of the synth. Voltage regulators like the 7805 used in the MT-32 are quite happy with a wide range of input voltages and many also feature automatic shutdown when voltage or temperature limits are exceeded (thereby protecting the rest of the circuit).

[Cloudschatze]

Thanks for the replies!

Here is a photograph of my handiwork. (Terribly exciting)