Amiga A4000 - Removing Expansion Boards; Setting Jumpers

3-8 When Installing Internal Options
Removing Expansion Boards
To remove an installed expansion board:
1. Once you have opened the Amiga, turn it so that the
daughterboard faces you.
2. Disconnect
any wires, ribbon cables, etc., that may be connected
to
the expansion board.
3. Remove
the screw securing the expansion board's rear bracket
to the Amiga's chassis.
4.
Grasp the expansion board firmly near either end, and pull
forward. You may have to rock the board slightly from side to
side--not up and down-to loosen it in the slot.
5. If not installing another expansion board in the vacant slot,
replace the slot's cover plate and secure it with the screw.
Setting Jumpers
Jumpers are small components on a circuit board that control a
computer's or expansion unit's hardware configuration. It is
sometimes necessary to set one or more jumpers to change the
default configuration of the computer, or to add an internal
expansion device.
A
jumper consists of a row oftwo or more closely spaced metal pins
projecting from the circuit board and a metal-lined plastic cap that
can fit over two adjacent pins. The cap connects (shorts) the two
pins.
When two ofthe pins are connected by the cap, they are
"closed;" pins not connected by the cap are "open." The combination
of open and closed pins is the jumper's setting, which determines a
specific
hardware function.
Note If all pins on a jumper must be left open, save the cap
by covering only one pin of the jumper. This keeps the
cap handy if you need to change the jumper's setting in
the future.