Roland SOLJET Pro III XC-540 Service Notes page 105

Perform [Get Report] and [Get Parameters], and save
3
them.
Turn off the Main Power SW and pull out the AC cord.
4
Disconnect all the Cables which are connected to the
5
Main Board, Servo Board and Head Board.
Remove the screws as shown in the figure fixing the head
Revised 1
6
Board and Main Board, and replace with the new Main
Board.
< Rear view >
Main Board
3-43
Main Power SW
Head Board