NEC 120Lg manual Disassembly and Reassembly

To replace the RTC battery, perform the following procedures:

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. For rack-mount systems you must remove the front panels of the system chassis.

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 system 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.If present, remove the protective plastic cover located over the top of the lithium battery (see Figure 4-5).

10.Insert the tip of a small flat-bladed screwdriver, or equivalent, under the plastic tab on the plastic retainer (see Figure 4-5, A).

11.Gently push down on the screwdriver to lift the battery (see Figure 4-5, B).

12.Remove the battery from its socket (see Figure 4-5, C).

13.Dispose of the battery according to local ordinance.

14.Remove the new lithium battery from its package, and, being careful to observe the correct polarity (plus sign (+) up) insert it into the battery socket.

15.If applicable, reinstall the plastic cover on the lithium battery socket.

16.Reinstall the air duct.

17.Reinstall the left-hand side access panel on the system chassis.

18.Plug in the system power cord(s), and turn on the system.

Disassembly and Reassembly 4-11