TANDY 2500 RSX  (250-1620/1621) Expansion Board Install Faxback Doc. # 1899

Note: Read the instructions in this section and in the option documentation
before installing hardware.

Opening the Computer:

CAUTION: Before opening the computer, turn off the computer and disconnect
all electrical cables. Discharge any accumulated static electricity from you
body by touching a grounded metal object.

To open the system unit, follow these steps:

1. Remove the two cover-mounting screws from the computer's outer cover.
2. Slide the cover toward the front of the computer until it clears the
   alignment pins.
3. Lift the cover off the computer.
4. Use a screwdriver to remove the screws on the expansion adapter cover.
5. Remove the expansion adapter cover by swinging it open from the top, and
   pulling it out of the retaining slots at the bottom of the frame.
6. Place your hand in the front opening, and rotate the carriage away from
   the frame. The carriage should rest at a 90-degree angle in the slots on
   the frame.

CAUTION: Allowing the carriage to extend backward beyond the 90-degree 
position can damage the carriage hinge or cables.

Installing an Expansion Adapter:

1. Remove the screw from the expansion slot cover at the back of the
   computer.
2. Slide the metal slot cover out of an expansion slot.
3. With the mounting bracket at the back of the unit, carefully align the
   expansion adapter into the expansion adapter with the riser card. Press
   the expansion adapter into the expansion slot and the expansion adapter
   guide.

Note: Be sure the adapter is fully seated.

4. Secure the contoured lip of the mounting bracket to the back of the
   computer using the screw previously removed from the slot cover.
5. Run the setup utility after installing the expansion adapter.