Intergraph TD-300 Maintenance Manual - page 71
Chapter 4 - Maintaining the System 57
7.
Disconnect the cables from the external ports.
8.
Using a three-sixteenth-inch nutdriver, remove the jackscrews from
the video, parallel, and serial ports.
9.
Using an 8 mm or five-sixteenth-inch nutdriver, remove the hex nuts
from the line out, line in, and microphone jacks.
10.
Using a quarter-inch nutdriver, remove the eight grounding screws
from the system board.
11.
Slide the system board to the front of the base unit.
12.
Lift the board and remove it from the base unit. Set the board on a flat
antistatic surface.
13.
Remove the new system board from the antistatic bag and place it on a
flat antistatic surface.
14.
Remove the SIMMs from the old system board and install them onto
the new one in the same configuration.
15.
A metal brace secures the installed CPUs with heat sinks to the
sockets. Remove the brace from each CPU. The following figure
shows the CPUs on the system board.
16.
The primary CPU is installed in a Low Insertion Force (LIF) socket.
Use a single-slot screwdriver to gently pry the processor and heat sink
out of the socket.
17.
The secondary CPU is in a Zero Insertion Force (ZIF) socket.
Disengage the CPU by raising the CPU lever until it locks to the
vertical position. Grasp the CPU by the heat sink and remove it.