IBM 8685 Hardware Maintenance Manual - Page 130

SCSI backplane, Move the shuttle back to allow easy access to the board.

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Page 130 highlights

5. Open the release lever of the microprocessor socket. 6. Pull the microprocessor out of the socket. To install a microprocessor, see "Installing an additional microprocessor" on page 89. Attention: If you are not installing a replacement microprocessor in socket 4, you must reinstall the microprocessor baffle in that socket. SCSI backplane Complete the following steps to remove the SCSI backplane. Note: v Read "Before you begin" on page 41. v Read the safety notices at "Safety information" on page 169. v Read "Handling electrostatic discharge-sensitive devices" on page 172. 1. Turn off the server. 2. Disconnect all power cords and external cables from the back of the server. 3. Remove the server cover (see "Removing the top cover (all models)" on page 51). 4. Pull out the hard disk drives (see "Installing a hot-swap hard disk drive" on page 75). 5. Disconnect the SCSI backplane cables from the system board (see "System-board internal cable connectors" on page 45). 6. Move the shuttle back to allow easy access to the board. Note: The illustrations in this document might differ slightly from your hardware. SCSI backplane Thumb screw NMI PCIA SP PS1 PCIB LOG PS3 PS2 PCIC PS4 CPU DASD FAN VRM J1 REMIND SPOEVCER RENDO. N TEMP J4 J3 J2 J9 J8 J7 J5 J10 J6 J11 J12 88 7. Loosen the thumbscrew at the top of the SCSI backplane; then, lift the backplane out of the server. 8. Remove the six screws in the SCSI backplane and put them in a safe place; then, remove the backplane from the metal frame. 120 xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide

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5.
Open the release lever of the microprocessor socket.
6.
Pull the microprocessor out of the socket.
To install a microprocessor, see “Installing an additional microprocessor” on
page 89.
Attention:
If you are not installing a replacement microprocessor in socket 4, you
must reinstall the microprocessor baffle in that socket.
SCSI backplane
Complete the following steps to remove the SCSI backplane.
Note:
v
Read “Before you begin” on page 41.
v
Read the safety notices at “Safety information” on page 169.
v
Read “Handling electrostatic discharge-sensitive devices” on page 172.
1.
Turn off the server.
2.
Disconnect all power cords and external cables from the back of the server.
3.
Remove the server cover (see “Removing the top cover (all models)” on
page 51).
4.
Pull out the hard disk drives (see “Installing a hot-swap hard disk drive” on
page 75).
5.
Disconnect the SCSI backplane cables from the system board (see
“System-board internal cable connectors” on page 45).
6.
Move the shuttle back to allow easy access to the board.
Note:
The illustrations in this document might differ slightly from your hardware.
88
Thumb screw
SCSI backplane
7.
Loosen the thumbscrew at the top of the SCSI backplane; then, lift the
backplane out of the server.
8.
Remove the six screws in the SCSI backplane and put them in a safe place;
then, remove the backplane from the metal frame.
120
xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide