Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Hi Mike,

Even the Korg Poly 800 OEM adapter gives out 12 volts...

Looking at the adapter, its shows it as 9V neg center 700mA 15W @ input. But when I measure the voltage it gives out 12V! But this works fine with my other Korg Poly 800. So I doubt its the power supply adapter. As long as the polarity is correct (which even if its not the D2 diode will protect the circuit from wrong polarity).
Its not the supply (though I agree seems rather high for a 9V).

One odd thing is the other wall wart supply I have, with the correct voltage and polarity, it started to heat up very hot!

Did not start a fire thank god but it too is rated at 9V, 500mA and gives out 13V!

Whats the deal with 9V giving out ~12-13V?!

I swapped out the D2 diode (not sure it was bad, my diode checker is kaput! LOL)

Found an electronics shop that has Q1, Q3 and Q16 gonna swap those out and remeasure voltages.

Right Now I am getting around 3.7 volts across EC on Q1...10V across D4 and .4V at pin 6!

aaaggggh!