NEC Express 5800/120Lg, Service Manual

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4-56 Disassembly and Reassembly
Replacing the Rear Cooling Fan
1.
Observe the safety and ESD precautions listed under General Information
and Static Precautions at the beginning of this chapter.
2. Open the front bezel of your system's cabinet.
3. Shutdown the operating system (OS).
4.
Press the power on/off switch on the front panel of the server (see
Front View in Chapter 1). The power-on LED goes out.
5. Power off the peripheral devices.
6. Unplug the system power cord(s) from the AC wall outlet(s).
Note:
If the system power cord is connected to a power
control unit such as an UPS (Uninterruptible Power Supply),
refer to the UPS user's guide for proper power-off
procedures.
7.
Remove the left-hand side access panel of the chassis following procedures
previously described in this chapter.
!
CAUTION
For proper cooling and airflow, do not operate the system
with the side access panel removed. Always
replace the
panel before powering on the system.
8.
Remove the processor air duct. See Processor Air Duct Removal earlier in
this chapter.
9. Disconnect the rear cooling fan cable to the system board. See Figure 4-53.
Figure 4-53. Rear Cooling Fan System Board Connector
Fan Connector