4016 SX  (250-4901)  Installing Optional Hardware      Faxback Doc. # 1932


If you install or remove any add-on options yourself, read the necessary
steps here and in the manuals provided with the hardware options. Refer to
Main Logic Board Layout for the location of sockets, slots, switches, and
jumpers.

Note: Trained technicians at a Radio Shack Service Center will install
add-on devices if you choose not to do so yourself.

When installing internal options, be sure to:

* Check the hard drive user's guide to determine whether you need to secure
  the drive heads before opening the computer if you have a hard disk drive
  installed.
* Refer to Opening the Computer for instructions before you open the system
  unit.
* Check the on-board serial and parallel port configurations if you are
  connecting a serial or parallel device. Refer to Main Logic Board Layout
  for details.
* Run the Setup program to complete the installation of drives, memory, or
  expansion adapters.

When installing expansion adapters, be sure that:

* The metal slot cover on the expansion adapter is seated correctly in the
  back panel slot
* The fastening screw is securely tightened.
* The front end of the adapter fits into the corresponding plastic expansion
  adapter guide (long expansion adapters only).
* The expansion adapter is securely mounted in the expansion adapter slot

Opening the Computer:

Warning: Before you open the computer, be sure that it is located in a safe
working area, its power is off, and its electrical cables are disconnected.

To open the system unit, follow these steps:

1. Remove the two cover mounting screws from the outer cover of the computer.
   These screws are located at the sides of the cover, near the back of the
   unit.
2. Slide the cover toward the front of the computer until it clears the
   alignment pins.
3. Lift the cover off the computer.
4. Unlock the keylock on the center bar, if necessary.
5. Using a coin or a screwdriver, turn the two fasteners on the expansion
   adapter cover. The fasteners pop up slightly after one-quarter turn.
6. Remove the expansion adapter cover by pulling it from the retaining slots
   at the bottom of the frame.
7. Rotate the carriage away from the frame. The carriage should rest at a
   90-degree angle in the slots on the frame.

Closing the Computer:

1. Close the carriage. Be sure it rests securely against the center bar.
   Check that any connections between the carriage and the main logic board
   are intact.
2. Slide the tabs at the bottom of the expansion adapter cover into the
   retaining slots on the frame.
3. Replace the expansion adapter cover. Be sure it rests securely over the
   center bar.
4. Depress and turn the two fasteners one quarter turn to secure the
   expansion adapter cover.
5. Lock the keylock to protect the system components from unauthorized
   removal.
6. Carefully position the outer cover on the base.
7. Slide the cover along the base toward the back of the computer until it
   fits into place.
8. Screw the two cover mounting screws into the outer cover of the computer.

Installing an Expansion Adapter:

Refer to Opening the Computer if you need instructions to open the unit. To
install an expansion adapter, follow these steps:

1. Remove the screw from one of the expansion slot covers at the back of the
   computer.
2. Slide the metal bracket out of the slot.
3. With the back edge of the expansion adapter (the end with the metal
   bracket) facing the back of the computer, carefully align the expansion
   adapter in the expansion adapter guide. Press the adapter into the
   expansion slot, and be sure the expansion adapter is fully seated.
4. After the expansion adapter is fully seated, secure it with the screw you
   removed in Step 1.
5. Run the Setup utility, if necessary, to complete the installation. See
   Setup in the Utilities Diskette section for more information.

(jej-05/11/94)