Aaeon SBC-590 User Manual page 21

The SBC-590 CPU card supports Intel Pentium 75~166 and other
compatible CPUs at 66/60/50/40 MHz (external clock speed). The
system's performance depends on the CPU you choose. You can
install or upgrade the CPU in the board's ZIF socket by following
the procedures outlined below. If your system has an existing
CPU, you need to remove it before installing the new CPU.
1. Pull the lever on the side of the ZIF socket out a little and raise
it up as far as it will go.
2. Lift the CPU out.
1. Make sure the ZIF socket lever is up as far as it can go. The
Pin 1 position is at the arm corner.
2. Match Pin 1 on the CPU with the Pin 1 position on the ZIF
socket. The pins on the three inner rings of the CPU should be
aligned with the holes on the ZIF socket.
3. Insert the CPU. If it does not go in easily, lift the lever higher.
4. Press the lever down. The sliding plate will move forward to
position the CPU. You will feel some resistance in the lever as
the CPU is secured into place. When the CPU is properly
installed, the lever will snap into place at the side of the ZIF
socket.
When you install a new CPU, you may have to adjust other
settings on the board, such as CPU type, CPU clock and PCI
speed, to accommodate it. Make sure that the settings are correct
for your CPU. Improper settings may damage the CPU.
14 SBC-590 User's Manual