Vintage Synth Repair

my xv88 just fell and pushed the volume and palette sliders into the
case and adding insult to injury, she no longer makes a sound.   having 
removed the obvious screws i still can't seem to open the
case to try an make the repair.  does anyone know how to open the case 
or where i might find schematics or instructions?

peace and cookies,
fre

update - seems i was just being too ginger and did not exert enough 
force.  having opened the lady i found her 'panel a board' was 
cracked.  i am currently ordering another from roland, but i do 
appreciate the help.

peace and cookies,
fre