Replacing Maintenance Parts; Optional Board; Cpu Board - Epson RC420 Manual

10. Replacing Maintenance Parts

10.1 Optional Board

(1) Shut down Windows. Turn OFF the Controller.
(2) Disconnect the cable for the optional board from the back of the Controller.
(3) Remove the Top Cover from the Controller.
(4) Remove the four screws circled in the picture below for the board holder assembly
(5) Disconnect all cables from the CPU board.
(6) Remove the mounting screw for the optional board and remove the board from its
(7) Install the new board in the slot and install the mounting screw.
(8) Connect the cables that were disconnected in step (5) to the CPU board.
(9) Mount the board holder assembly to the Controller.
(10) Mount the Top Cover to the Controller.
(11) Connect the cables that were disconnected before the board replacement to the back

10.2 CPU Board

(1) Shut down Windows. Turn OFF the Controller.
(2) Disconnect the cables for the CPU board from the back of the Controller.
(3) Remove the Top Cover from the Controller.
(4) Remove the four mounting screws for the board holder assembly and remove it.
RC420 Rev.9
and remove the assembly from the Controller.
slot.
of the Controller.
Maintenance 10. Replacing Maintenance Parts
Board holder assembly
Board mounting screw
137