Chapter 7. IBM System x3690 X5 303
Figure 7-2 Location of switch block SW2 and the CMOS memory battery
c. The numbers on the switch block represent the OFF side of the switch. They are
located on the side of the switch block that is closest to the front of the server. To clear
CMOS, slide switch 1 (shown in Figure 7-3) to the ON position closest to the rear of the
server.
Figure 7-3 Location of switch 1 on switch block SW2
Pull the CMOS memory battery for 30 seconds:
a. Disconnect the ac power from the server and remove the cover.
b. Locate the CMOS battery (shown in Figure 7-2).
c. Use your finger to pry up the battery on the side closest to the neighboring IC chip. The
battery will easily lift out of the socket.
d. After 30 seconds, insert one edge of the battery, with the positive side up, back into the
holder.
Note: The light path diagnostic (LPD) lights are powered from a separate power
source (capacitor) than the CMOS memory. LPD lights will remain lit for a period of
time after ac power and the CMOS memory battery have been removed.
Switch block SW2
CMOS memory battery
Switch 1 on switch block SW2
in the default OFF position
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