Hi,
The PSR 2000 owner's manual I have dowloaded from,
http://www2.yamaha.co.jp/manual/pdf/emi/pdfe/port/PSR2000E2.pdf http://www2.yamaha.co.jp/manual/pdf/emi/pdfe/port/PSR2000E1.pdf

it doesn't answer to those questions.
Only already existent users of the keyboard can observe these details and answer.
Thanks
Regards
Carlos Rodrigues