IBM 8681 Hardware Maintenance Manual - Page 133

Jumper settings Jumpers located on the I/O function card and processor controller board help you to customize the way the server operates. The processor controller board and I/O function card contain two-pin jumper blocks and three-pin jumper blocks, respectively. In some cases, groups of jumpers might combine to define a function. Before you begin: Read "Safety information" on page 240. To change a jumper setting: 1. Remove the server top cover or front bezel, depending on the location of the jumper (see "Preparing to install options" on page 134). 2. Locate the jumper whose setting you want to change: To change a two-pin jumper block, continue with "Two-pin jumper blocks." To change a three-pin jumper block, continue with "Three-Pin jumper blocks" on page 126. Two-pin jumper blocks: Two-pin jumper blocks are located on the processor controller board. Covering both pins with a jumper defines one function of the jumper block. To change the function of the jumper block, cover one pin only or remove the jumper entirely. The following illustration identifies pins 1 and 2 on a two-pin jumper block. 12 To change the jumper setting on a two-pin jumper block: 1. Lift the jumper straight off the block; then, do one of the following: Align the holes in the bottom of the jumper with the two pins on the pin block, and then slide the jumper carefully onto these pins. Netfinity 8500R - Type 8681 125