Chapter 5: Dismantling
ABL77 Service Manual
CPU or Touch Screen Boards
CPU or Touch
screen boards
Follow these steps to remove the CPU or touch screen controller boards as shown
in Figure 5-28.
Step Action
1.
If replacing the CPU board, remove the LCD adapter board, memory
module and ChipDisk board.
2.
Disconnect the power cable from the left rear of the CPU board by
pulling straight up.
3.
Disconnect the Ethernet cable from the right rear of the CPU board by
pulling straight up.
4.
Using a Phillips screwdriver, loosen the four screws from the corners
of the CPU board.
5.
Disconnect the two-wire power cable from the front of the touch
screen controller board.
6.
Gently lift the CPU board and touch screen controller board assembly
up and out.
NOTE:
Be careful of the cables in the back, and the disk drive cable
on the right, which must slide out of the board guide.
7.
Remove the A/D cable from the rear of the CPU board.
8.
Remove the disk drive cable from the right of the CPU board.
9.
Disconnect the touch screen cable.
10.
Remove the four screws and the spacers from the corners of the board
assembly.
11.
Pull apart the CPU and touch screen controller boards and replace the
appropriate board.
5-48
Rev.
F