Does any one know how to, or have the illustration to open the Roland g-70 case to access the inside of the keyboard?

There seems to be 6 phillips screws on the bottom edges of the keyboard just beside the silver end-caps. Also there are 8 phillips screws at the back of the keyboard midway down from the top just under the bend.

I can't see any others that would attach the top. After several attemps I still can't remove it.

Thank-you for your help