IBM 86625RY Hardware Maintenance Manual - Page 184

Changing jumper positions Jumpers located on the system board and the processor board help you to customize the way the server operates. The system board, processor board, and SCSI backplane contain two-pin and three-pin jumper blocks. In some cases, groups of jumpers might combine to define a function. Two-pin jumper blocks: 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. 21 To change a jumper's position for a two-pin jumper block: 1. Turn off the server; then, disconnect the server power cords. 2. Remove the server cover (see "Preparing to install options" on page 246). 3. Do one of the following: Lift the jumper straight off the pin block. Align the holes in the bottom of the jumper with the two pins on the pin block, and then slide the jumper onto these pins. Align one of the holes in the bottom of the jumper with one of the pins on the pin block, and then slide the jumper onto that pin only. 176 Netfinity Server HMM