IBM 847691U Hardware Maintenance Manual - Page 150

System board illustration The system board, also called the planar or motherboard, is the main circuit board in the server. It provides basic server functions and supports a variety of devices that are preinstalled or that you can install later. Some configuration actions are controlled through jumpers on the system board, whereas other actions are controlled through switches. The following sections discuss the jumper and switch settings that you can change. If you plan to install, remove, or replace hardware in the server, or if you must set jumpers and switches, you will need to know the layout of the system board. The following illustration shows the layout of the system board in the server. The numbered pointers show the components that are discussed in this book. Notes 1. An illustration of the system board and additional information are provided on a label inside the server. 2. The configuration switches (1-8) are also known as rocker switches. Their settings are specified later in this chapter. 1 Battery 2 Configuration (rocker) switches (SW1) Switches 1-4 Microprocessor speed Switch 5 ROM operation mode Switch 6 Ethernet controller operation mode Switch 7 Administrator password 142 Netfinity Server HMM