The Yamaha AN1x Synthesizer mailing list

My AN1x's volume seems really low. I read on sonicstate that there is 
an internal volume switch in the AN1X that controls between -6, 0, 
and +6 db:

fromm sonicstate.com:
oatbran71@..., theres an internal switch that allows you to 
set the VCA output from -6 0 +6 and +12 db output, I think that 0db 
is good enough, but if its too low try setting it to +6 db. 

You can also do this with the an1x editor on the VCA section 


My questions: How do I open up the AN1x and where is the switch. 
Thanks for your help!!