IBM eServer 370 xSeries, User Reference Manual

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Changing jumper settings
Jumpers located on the I/O function card and processor controller board help you
to customize the way your server operates.
Your 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.
To change a jumper setting:
1. Read “Safety information” on page 39 through “Handling static-sensitive
devices” on page 43.
2. Remove the server top cover or front bezel, depending on the location of the
jumper (see “Preparing to install options” on page 48).
3. 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 112.
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.
2 1
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.
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 carefully onto that pin only.
Chapter 5. Board and adapter components
111