Emax

Help!  My emax HDSE just quit.  I need to know if someone has a 
wiring diagram and the resistor value for the R1 on the power 
converting PC board.  It is the PC where AC power comes into 
the keyboard.  It is labeled National Power Technology px-430 
and 125x.  I think I can replace that and get it running, however it 
is completely burned through the resister, so I can't read the 
color coding of the resistor.  Is there a source for parts in the 
US?  I use this keyboard live, so I need a fast fix.  Thanks for your 
help!  -Alan