GTCO CR 1212 - Configuration - Manual (Page 4)

6. Turn the tablet on the other side and perform Steps 4 and 5. The top and bottom
covers should pull away easily. If not, lay the tablet upside-down on the work
surface. Pull the back cover up and out from the bottom edge.
7. Lay the top cover aside with the green plate facing up. (The plate is held onto two
cover posts by black rubber grommets. Ensure that these are not lost.)
8. Lay the bottom cover right-side-up, which is with the cavity facing you. The printed
circuit board is underneath the metal shield. Using a Phillips head screwdriver,
remove the center screw and lay it aside. (Please note that the screw is different
from the others with a shorter and thicker aspect. Do NOT mix it up with the other
screws.) Lift the shield off the board and set aside.
9. Life the printed circuit board out and up, making sure that the On/Off switch clears
the cabinet. This may require wiggling the board a little.
10. The locations of jumpers W5, W7, W8 and W9 are shown below. Do not change
other jumpers on the board.