Intel SBC-455 manual Safety precautions, Installing the CPU, Removing a CPU

Safety precautions

Warning! Alwayscompletelydisconnectthepowercordfrom yourchassiswheneveryouareworkingonit.Do notmakeconnectionswhilethepowerison

becausesensitiveelectroniccomponentscanbe damagedbythesuddenrushofpower.Only experiencedelectronicspersonnelshouldopen the PC chassis.

Caution! Alwaysgroundyourselftoremoveanystatic chargebeforetouchingtheCPUcard.Modern

electronicdevicesareverysensitivetostatic electriccharges.Useagroundingwriststrapat alltimes.Placeallelectroniccomponentsona static-dissipativesurfaceorinastatic-shielded bagwhentheyarenotinthechassis.

Installing the CPU

The SBC-455 CPU card supports most 486 CPUs. The system's performance depends on the CPU you choose. You can install or upgrade the CPU in the board's PGA socket by following the procedures outlined below. If your system has an existing CPU, you need to remove it before installing the new CPU.

Removing a CPU

1.Disconnect power from the chassis, and unplug all connections to the CPU card. Then, remove the CPU card from the chassis by following the instructions in the user's manual for your chassis.

2.Lift the CPU out of the PGA socket. The old chip may be difficult to remove. You may find spray chip lubricant, designed for pin-grid-array (PGA) devices, and a chip puller helpful. These are available at electronics hobbyists' supply stores.

Chapter 2 Installation 13