Service Manual

Removing and Replacing Parts 4-21
System Board Fans
Figure 4-16. System Board Fans
The system board fans are hot-pluggable and can be quickly replaced (see
Figure 4-16) while the system is running.
WARNING: If replacing this assembly while the system is running,
make sure you have the new fan assembled and handy, and perform
the procedure quickly to avoid overheating the microprocessor(s).
1. Assemble the new fan.
Use the push fasteners that came with the new fan to install the finger
guard on the fan. Install the guard so that the fan’s airflow arrow points
away from the guard.
2. Slide the system board tray out to the service position.
See “Accessing the Interior of the System” in Chapter 1 for instructions.
3. For the fan to be replaced, disconnect its cable from the extension
cable attached to the appropriate fan connector (FAN1or FAN2)
on the system board.
4. Pull outward on the fan-retention tabs to disengage the fan.
To install the new fan, slide the fan into the fan housing, align the holes in the
corners of the fan with the studs in the housing, and snap the fan into place.
Connect the fan to the appropriate extension cable.