Chapter 5. Field Replaceable Units; Microprocessor Air Baffle - IBM 84885BU Maintenance And Troubleshooting Manual

Chapter 5. Field replaceable units

Microprocessor air baffle . . . . . . . . . . . . . . . . . . . . . 67
Microprocessor and heat sink . . . . . . . . . . . . . . . . . . . 68
CD-ROM drive . . . . . . . . . . . . . . . . . . . . . . . . . 70
Diskette drive . . . . . . . . . . . . . . . . . . . . . . . . . 71
SCSI backplane . . . . . . . . . . . . . . . . . . . . . . . . 72
Non-hot swap power supply . . . . . . . . . . . . . . . . . . . . 73
Hot-swap power-supply cage . . . . . . . . . . . . . . . . . . . . 75
Rear-adapter retainer . . . . . . . . . . . . . . . . . . . . . . 77
Front fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Rear fans . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Power/LED switch assembly . . . . . . . . . . . . . . . . . . . . 81
Front USB connector assembly . . . . . . . . . . . . . . . . . . . 83
System board . . . . . . . . . . . . . . . . . . . . . . . . . 85
Top/side cover . . . . . . . . . . . . . . . . . . . . . . . . . 92
Bezel-release latch . . . . . . . . . . . . . . . . . . . . . . . 93
Handle assembly . . . . . . . . . . . . . . . . . . . . . . . . 95
The following information describes procedures for removing and installing certain
components inside the system. Only a qualified service technician is authorized to
replace the components described in this section.
Important: The field replaceable unit (FRU) procedures are intended for trained
Note: Before servicing this system, read "Installation guidelines" on page 25 and

Microprocessor air baffle

The microprocessor air baffle is held in place by two tabs that protrude through
slots in the rear of the server. Complete the following steps to remove the

microprocessor air baffle:

1. Open the microprocessor air baffle.
2. At the rear chassis wall, press the sides of the microprocessor air baffle toward
3. Lift the guide up and out of the server.
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System board option connectors . . . . . . . . . . . . . . . . . 85
System board internal connectors . . . . . . . . . . . . . . . . . 86
System board external connectors . . . . . . . . . . . . . . . . . 87
System board error LEDs . . . . . . . . . . . . . . . . . . . . 88
System board jumpers and switches . . . . . . . . . . . . . . . . 89
Removing the system board . . . . . . . . . . . . . . . . . . . 90
servicers who are familiar with IBM xSeries products. See the parts
listing in "System replaceable units" on page 131 to determine if the
component being replaced is a customer replaceable unit (CRU) or a
FRU.
Appendix B, "Safety information," on page 143.
each other and move the baffle toward the front of the server.
67