Data General AViiON 4600 Series, Customer Documentation

Page: 176 / 266

Replacing the System Board
10-6
014–002091
To install the system board, follow the steps below. You will need a small (#1) and a
medium (#2) Phillips screwdriver.
1.
Examine the pins on the original PROM component (the PROM component you
removed from the failed system board) to see if they are straight as shown in
Figure 10Ć8. If they are spread too far apart or angled incorrectly as shown in
Figure 10Ć8, you must straighten the pins as follows.
Lay the PROM component down on one side on a table, and carefully roll the
component to bend the pins into line as shown in Figure 10Ć8. Once the pins are
in line on one side, repeat this procedure with the other side of the component.
Angled pin Spread pins
PROM component pin positions
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
Straight pins
Straightening PROM component pins
Figure 10-8 Straightening the Pins on the PROM Component
2. Match the notch on the PROM component with the notch on the replacement
system board socket. Then align the pins of the PROM component with the holes
in the socket as shown in Figure 10Ć9, and insert the PROM component into the
socket. If your PROM component has no notch, align the component with the
round surface dot in the upper right corner, as shown in Figure 10Ć9.
Lower rightmost
SIMM connector
System board
Install PROM component
Alignment
dot
Figure 10-9 Installing the PROM Component