IBM 8659-71Y Maintenance Manual - Page 83

Changing Jumper Positions

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Changing Jumper Positions The DASD backplane, which is the Netfinity 5000 SCSI backplane, contains two-pin jumper blocks, which are behind the daughterboard (SAF-TE) on the DASD backplane. Jumper block J4 controls the addressing of the SCSI hard disk drive hot-swap bays. See "SCSI Jumpers" on page 137 for details. Two-Pin Jumper Blocks: Covering both pins with a jumper specifies one function of the jumper block. Covering one pin only or removing the jumper entirely changes the function of the jumper block. To change a jumper's position for a two-pin jumper block: 1. Turn off the server; then disconnect the server power cord. 2. Remove the server cover (see "Option Installation" on page 125). 3. Locate the jumper block, removing any adapters or components that may hinder access to the jumper block. 4. Do one of the following: Remove a jumper by performing either action: - Lift the jumper straight off the pin block. - 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. Place a jumper by aligning the holes in the bottom of the jumper with the two pins on the pin block, and then sliding the jumper onto these pins. Netfinity 5000 - Type 8659 75

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Changing Jumper Positions
The DASD backplane, which is the Netfinity 5000 SCSI
backplane, contains two-pin jumper blocks, which are
behind the daughterboard (SAF-TE) on the DASD
backplane.
Jumper block J4 controls the addressing of the
SCSI hard disk drive hot-swap bays.
See “SCSI Jumpers”
on page
137 for details.
Two-Pin Jumper Blocks:
Covering both pins with
a jumper specifies one function of the jumper block.
Covering one pin only or removing the jumper entirely
changes the function of the jumper block.
To change a
jumper's position for a two-pin jumper block:
1.
Turn off the server; then disconnect the server power
cord.
2.
Remove the server cover (see “Option Installation” on
page 125).
3.
Locate the jumper block, removing any adapters or
components that may hinder access to the jumper
block.
4.
Do one of the following:
±
Remove a jumper by performing either action:
–
Lift the jumper straight off the pin block.
–
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.
±
Place a jumper by aligning the holes in the
bottom of the jumper with the two pins on the pin
block, and then sliding the jumper onto these
pins.
Netfinity 5000 - Type 8659
75