NEC EXPRESS5800/180Ra-7 User Manual page 126

Replace the battery as follows.
Note:
wrist strap.
1. Observe the safety and ESD precautions listed at the beginning of this
chapter.
2. If tower-based system remove the top cover of the tower cabinet and then go
to step 4. See Removing the Top Cover of the Tower Cabinet earlier in this
chapter.
3. Power off the system. Ensure the power cords are unplugged from the AC
wall outlet.
4. Remove the BSU front bezel and top cover. See Installing/Removing the
BSU Front Bezel and Top Cover earlier in this chapter.
5. Find the I/O riser board that is plugged into the system I/O board located at
the rear left-hand side of the BSU, see Figure 1-5.
6. The battery is located on the I/O riser board directly under the diskette drive
cable connector P9.
7. Temporally disconnect the diskette drive ribbon cable from connector P6 on
the I/O riser board.
8. If the battery has a protective plastic cover, remove the cover by lifting it
away from the battery. Use your fingernail or a small pointed tool to gently
push up the bottom edge of the battery. See Figure 4-35 for socket location.
9. Position the new battery over its socket with the plus (+) sign on the battery
facing up.
10. Carefully insert the top of the battery into the socket connectors and gently
push the battery into the socket until it is firmly seated in the socket.
11. Reconnect the diskette drive ribbon cable that was temporally disconnected
in step 7 above.
12. Install the BSU front bezel and top cover. See Installing/Removing the BSU
Front Bezel and Top Cover earlier in this chapter.
13. If tower-based system, reattach the top cover of the tower cabinet. See
Installing the Top Cover of the Tower Cabinet earlier in this chapter.
14. Plug in the power cords and power up the system.
15. Run the BIOS Setup to restore configuration settings to the real-time-clock.
4-32 Upgrading Your System
Observe static precautions. Use an antistatic