Oracle Sun Fire X4240, Service Manual

Page: 73 / 190

Chapter 4 Servicing Motherboard Components 4-11
■
Section 4.2.2, “Installing the Air Duct” on page 4-13
You must remove the air duct when removing and installing the following
components:
■
Power distribution board
■
Power supply unit (PSU) PDB
■
Paddle card
■
Motherboard
Note – CRU : This customer replaceable unit can be replaced by anyone.
Caution –
To prevent the system from overheating, ensure that the air duct is
correctly installed before powering on the server.
4.2.1 Removing the Air Duct
1. Prepare the server for service.
a. Power off the server.
See Section 2.5, “Powering Off the Server” on page 2-4 .
b. Disconnect the power cord (or cords) from the power supply (or supplies).
See Section 2.5, “Powering Off the Server” on page 2-4 .
c. Slide the server out of the rack.
See Section 2.6, “Extending the Server to the Maintenance Position” on
page 2-6 .
d. Attach an antistatic wrist strap.
See Section 2.8, “Performing Electrostatic Discharge and Antistatic Prevention
Measures” on page 2-10 .
e. Remove the top cover.
See Section 2.9, “Removing the Top Cover” on page 2-12 .
2. Slide the air duct to the right to disengage the left hand pin as shown in
FIGURE 4-6
.
3. Slide the air duct to the left to disengage the right hand pin.
4. Move the air duct towards the back to clear the lip on the midwall.