NEC EXPRESS5800/120Lf, User Manual

Page: 83 / 198

Configuring Your System 3-23
Configuring System Board Jumpers
Before You Begin
Only a qualified technical person should perform the procedures in this section.
!
CAUTION
Electrostatic discharge (ESD) can damage the system
board. Modify the system board only at an ESD workstation.
Otherwise, wear an antistatic wrist strap attached to chassis
ground.
The system board jumpers enable you to set specific operating parameters for
your system. A jumper is a small plastic-encased conductor (shorting plug) that
slips over two jumper pins.
Figure 3-1 shows the location of system board jumpers. Referring to Figure 3-1,
jumper A is the password/CMOS configuration jumper. Table 3-3 lists the
factory default settings for the password/CMOS configuration jumper.
Jumper B shown in Figure 3-1 configures the CPU speed. This jumper must be
set to reflect the CPU processor(s) installed in your system. Table 3-4 lists the
default settings for jumper B.
1 3 5 7 9 11
2 4 6 8 10 12
A
(CN42)
1 3 5 7 9 11
2 4 6 8 10 12
B
(CN59)
Figure 3-1. System Board Jumpers