1200 BPS Internal Modem (250-1018A) Installation Faxback Doc. # 4781 Do not stand on a carpeted floor when you handle the modem. Walking on carpets promotes the build-up of static electricity, which, if discharged while you are handling a circuit board, can destroy integrated circuits (ICs) on the board. Touch a grounded metal object before handling any circuit board to avoid static electricity buildup. Touch a grounded metal object before handling any circuit board to avoid static electricity buildup. CONNECTING THE MODEM TO A MEMORY BOARD Your modem plugs into the Memory PLUS Expansion Board (Cat No. 25-1011), and the memory board plugs into one of the slots on the computer's main logic board. (The modem can also be used with the PLUS Upgrade Adapter Board, Cat. No. 1016). 1. If your Memory PLUS Expansion Board is already installed, turn off your computer and disconnect all the peripherals. Wait at least 10 seconds before handling the board. Remove the computer cover by unfastening the screws. Remove the screw that fastens the board to the computer. Remove the memory board from the socket on the main logic board by grasping it on the upper edge. 2. If you plan to install additional memory, you might need to remove the jumper on the memory board and add memory ICs to the board. If so, perform these steps now so that you do not have to remove the modem later. See your Memory PLUS Expansion Board Installation Guide for information on reconfiguring the jumper and installing the ICs. 3. The memory board comes with a metal bracket. To install the modem, you remove this bracket. Remove the two screws that secure the bracket. Remove the bracket and save it with the screws for future use. 4. Mount the supplied holder on the expansion board with the longer side down, and secure it with the three shorter screws (supplied) as shown. Do not overtighten the screw. 5. Attach Bracket A to the modem and secure its right edge with the shorter screw (supplied). 6. Packaged with the modem are three nylon stand-offs used to help support the modem. Insert the larger end of each stand-off into one of the holes on the modem. 7. Carefully align the modem's pin socket over the row of pins on the memory board. Then slowly lower the board onto the pins, maintaining the alignment so that the pins go into the corresponding holes on the socket. When the board is completely seated and parallel to the memory board, check that all pins are fully inserted into the socket. Do not force the board. Stop if your encounter any resistance. Do not force the board. It might have a bent pin that requires repair by a Radio Shack technician. 8. Snap each stand-off into the corresponding hole on the memory board by applying pressure to the modem. Secure the holder to the modem's bracket left edge with the shorter screw (supplied). You are now ready to install your modem/memory combination board onto the computer's main logic board. INSTALLING A MODEM/MEMORY COMBINATION BOARD Turn off your computer and disconnect all equipment. If any unit is on, you might damage the central processing unit or the board. Wait at least 10 seconds before removing or inserting any board into the computer. Be sure to touch a grounded metal object before beginning the installation and do not stand on a carpeted floor. 1. Remove the computer cover by unfastening the screws and sliding the cover toward the front or the back of the unit, depending on your computer. 2. Rotate the main unit so that the rear panel faces you. Select on of the unused slots, and remove its slot cover by unfastening the screw. Store the removed slot cover for future replacement. On the main logic board, directly behind the slot cover, is a thin edge connector slot. 3. As you look at the computer from the rear, check the upper right corner of main logic board for a small, multi-pronged metal connector. If you board does not have the connector, remove the short wire attached to one end of your memory board. You do not need it. If your board has the connector, do not remove the wire. You will connect this wire in Step 6. 4. Touch a grounded metal object. Then, grasp the combination board by its upper edges, and position it above the socket. Insert the combination board's bracket into the slot in the same way that the slot covers are mounted. At the same time, apply downward pressure evenly, engaging the edge connector in the socket. 5. Align the board's bracket so the cutout is positioned over the screw hole. Replace the screw you removed earlier. Do not overtighten it. 6. If you did not remove the wire mentioned in Step 3, fasten the free end of it to one prong of the multi-pronged connector. 7. Replace the computer's cover, securing it with the screws previously removed. INSTALL THE MODEM IN THE TANDY 1000 EX/HX You can also install the modem into the Tandy 1000 EX/HX. If you do not plan to install a memory board when you install the modem, you can mount the modem directly on the computer's main logic board. If you plan to install the Memory PLUS Expansion Adapter (Cat. No. 25-1062) in addition to the modem, or if the memory board is already installed, you must mount the modem on that board. 1. Turn off all equipment and disconnect any peripherals. 2. With the rear panel of the computer facing you, remove the option slot cover located on the top panel. Place your thumb on the edge nearest the front of the computer and press down to disengage the hook-latch. Then, slide the cover toward you. 3. Remove the option slot cover on the rear panel by removing the six screws. 4. Attach Bracket B to the modem. From the bottom of the board, insert and tighten the two bracket screws (supplied). 5. Carefully align and lower the modem pin socket on the pin header onto the computer's main logic board. Ledges on the computer will help secure the board once installed. 6. Secure Bracket B to the computer's rear panel. Align the hole on each end of the bracket with the hole on each side of the slot opening. Insert the longer screws supplied in the modem package and tighten them. 7. Snap off one segment of the rear panel's breakaway-type slot cover, and attach the remaining part of the cover to the rear panel. Align the cover holes with the four holes on the panel above the modem bracket, and insert the screws you removed earlier. INSTALL THE MODEM AND A MEMORY BOARD IN THE TANDY 1000 EX/HX If you plan to install the Memory PLUS Expansion Adapter (Cat. No. 25-1062) when you install your modem in the Tandy 1000 EX/HX, you must mount the modem on that board. 1. Turn off all equipment and disconnect any peripherals. If the memory board is already installed, wait at least 10 seconds before installing the modem. Be sure to touch a grounded metal object to discharge any static electricity. 2. Remove the option slot cover as described in Steps 2 and 3 in the previous section. 3. Carefully align and lower the memory board's pin socket onto the pin header on the computer's main logic board. 4. Secure the memory board's bracket to the computer's rear panel with the screws provided in the memory board's package. 5. Attach Bracket B to the modem. From the bottom of the board, insert and tighten the two bracket screws (supplied). 6. Carefully align and lower the modem pin socket onto the shorter of the two pin headers on the memory board. 7. Secure Bracket B to the rear panel with the screws provided in the modem package. 8. Snap off one segment of the rear panel's breakaway-type slot cover and attach it to the panel with the screws that you removed earlier. NOTE: When the board(s) are completely seated and parallel, check that all pins are fully inserted in the socket. Do not force the board. The shroud on the pin header is useful when you are aligning the pin connectors. (dkh-07/29/93)