Vintage Synth Repair

Anyone know the polarity requirement of the AC adapter for the Edirol 
PCR-50. I know that it should be 9 volt, 300mA, but don't know if it is 
negative or positive center.  I emailed this question to RolandUS, but 
they didn't answer the question, just suggested I purchase a 
replacement from them.  I have plenty of adapters, don't need to buy 
another one.
Thanks, Scott

scott-
every piece of boss/roland/edirol kit I've ever seen has been the same
way around- -ve or ground on the centre pin & +ve on the sleeve part.

hth-

duncan.

Anything over 300mA ,current wise , is fine too.

Scott  Frye
AudioFixation
Consumer / Pro Audio Repair
Southern VT 

"Resistance is futile but.....
Impedance is much more complex"