16
Changing the CPU on the PI-915 Main Board
The POS-420 Expander plus has two main board options, one features the 910 chipset which has the CPU
directly mounted on the main board, the other is the 915 chipset featuring a PGA socket-type CPU.
Standard equipment is a Celeron M 1.5GHz CPU, but the POS-420 Expander plus is upgradable to 1.8GHz.
1.
Turn off the system power properly through the operating system, then turn off any external
devices.
2.
Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
Regardless of the power-on state, voltage is always present on the main board as
long as the system is plugged into an active AC outlet. You must disconnect the
power cord to avoid damage to the internal components of the system.
Static electricity can damage the electrical components of the computer or
optional equipment. Before beginning these procedures, ensure that you are
discharged of static electricity by briefly touching a grounded metal object.
3.
Remove the system box and cover.
NOTE:
Before installing the CPU to the PI-915 main board, please make sure the CPU
FSB frequency matches the JP3 function definition. Refer to the Main Board
Configuration section for the JP3 description.
4.
Remove the 4 screws that secure the heatsink, paying special attention to its original position so
that you can place it back in its exact position.
5.
Locate the CPU socket. One side of the socket has a locking mechanism with a turn-screw that
secures the CPU.