Configuring System Board Jumpers; Before You Begin - NEC Express5800 User Manual

Configuring System Board Jumpers

Before You Begin

Only a qualified technical person should perform the procedures in this section.
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, A shows the location of the system board jumpers. Table 3-1 lists
the system board jumpers and their factory default settings.
Jumper Function
1 - 2 CMOS clear
3 - 4 Password disable
5 - 6 Reserved
7 – 8 Reserved
9 – 10 Reserved
11 - 12 Spare
3-16 Configuring Your System
! CAUTION
A
Figure 3-1. System Board Jumpers
Table 3-3. System Board Jumper Summary
Jumper On/Off
(default in bold)
Off, Protect
On, Erase
Off, Enable
On, Disable
Off, Not Used
Off, Not Used
Off, Not Used
Off, Not Used
On, Spare
11 9 7 5 3 1
12 10 8 6 4 2
What it does at system reset.
Preserves the contents of CMOS.
Clears CMOS.
Enables password protection.
Disables the password.
Required. Do Not Change.
Required. Do Not Change.
Required. Do Not Change.
Provides a spare jumper storage location.