NEC POWERMATE VP Manual page 238

CHANGING JUMPER SETTINGS
To change sound board jumper settings, use the following
procedure. NEC recommends using needle-nose pliers to
move a jumper.
Power off and unplug the system and any external
1.
options.
WARNING: The system power must be
off before changing a jumper setting.
Remove the system unit cover (see Chapter 5).
2.
Locate the jumper(s) on the sound board (see the figure
3.
earlier in this chapter).
You might have to remove the sound board or another
expansion board from the system to access the jumper
(see "Expansion Boards" in Chapter 6).
Change the jumper setting.
4.
If you removed the sound board or any other board
5.
from the system, replace it (see "Expansion Boards" in
Chapter 6).
Replace the system unit cover (see Chapter 5).
6.
Sound Board Jumper Settings D-11