8
INSTALLING SIMMS
We suggest that you gain a firm understanding of the following instructions before
you proceed with installation.
1.
Lay the expansion board on anti-static material, such as its original board
packaging, with the SIMM socket exposed.
2.
Position the SIMM with the keying notch to the left (see fig. 2.1 on page 7).
Hold the SIMM at both ends and insert its metal contacts into the metal
jaws of the SIMM socket. The 72-pin SIMM was designed to allow the user
to fit it into a SIMM socket only ONE way.
3.
When all the pins are flush and securely in the jaws of the socket, apply
enough pressure on the top of the chip to push the SIMM into the socket.
Maintain this pressure until the tension springs at the side of the socket lock
the SIMM into place (see fig. 2.1). Equal pressure should be maintained to
both side of the chip, as damage could be caused to the SIMM or SIMM
socket.
4.
You now need to change the jumper settings on the component side of the
board to match that of the RAM now installed (see fig. 2.2). Failure to do so
will result in board malfunction. Possible jumper combinations are shown in
the table below (see fig. 2.3). The three jumpers are clearly labelled LK1,
LK2 and LK3 on the board. If you have 1
Mb
on board follow the settings in
the first row, 2
Mb
on board follow the second row, etc.
REMOVING SIMMS
Push both tension springs (see fig. 2.1 on page 7) outwards at the same time and the
SIMM should come forward ready to be lifted out.
Figure 2.2 - Jumper Positions
Figure 2.3- RAM Jumper Configurations
POSSIBLE JUMPER SETTINGS
RAM
INSTALLED
1
Mb
2
Mb
4
Mb
8
Mb
Shorting
Block
LK1 LK2 LK3
Jumper
Pins
LINK REFERENCE
LK1
LK2
LK3