300 BPS Internal Modem (250-1017) Installation Faxback Doc. # 4945 The Modem Board will occupy the width of two expansion slots in any system, with the exception of the Tandy 1000 EX computer. CONNECTING THE MODEM BOARD TO THE EXPANSION BOARD Your Modem Board plugs into the Memory PLUS Expansion Board (250-1062), and the expansion board plugs into one of the slots on the computer's main cir- cuit board. It is recommended that you have the Modem Board installed by the service technicians at your Radio Shack Service Center. Doing so not only ensures expert installation, but also enables the technicians to quickly check that all the equipment is functioning properly. If, however, you DO decide to install the boards yourself, follow the instructions in this manual exactly. The details on installation will vary from computer to computer. With the following description, please refer to your computer's installation manual as well. The Modem Board can also be used with the PLUS Upgrade Adapter Board (Cat. No. 250-1016). For instructions on installing the PC Modem in the Tandy 1000 EX, refer to "Installing the Modem Board in the Tandy 1000 EX." 1. If your Memory PLUS Expansion Board is already installed, turn off your computer and disconnect all the peripherals. Wait at least 10 seconds, then remove the screw that fastens the board to the computer. Remove the expansion board from the socket on the main board of the computer by grasping it by the upper edge. 2. If you plan to install additional memory, you might need to remove the jumper on your memory and add memory IC's to the board. If so, perform these steps now so that you do not have to remove the Modem Board later. See your Memory PLUS Expansion Board Installation Guide for information on reconfiguring the jumper and installing the IC's. 3. The expansion board comes with a metal bracket. To install the Modem Board you must replace this bracket with the one supplied with the Modem Board Bracket A. Remove the 2 screws that secure the bracket. Remove the bracket and save it with the screws for future use. 4. Attach the bracket A to the expansion board and secure its left edge with the screw supplied with the bracket. Mount the supplied holder on the expansion board with longer side down, and secure it to the expansion board and right edge of the bracket. Do not overtighten the screw. 5. Packaged with the Modem Board are 3 nylon stand-offs used to help support the Modem Board. Insert the larger end of each stand off into one of the holes on the Modem Board. NOTE: If you are planning to use the Modem with a multi-line telephone, make the modification now. 6. Hold the Modem Board at a slight angle to the expansion board so that its phone jacks fit into the cutout. Carefully align the Modem Board's pin socket over the row of pins on the expansion 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 is parallel to the memory board, check to see that all pins are fully inserted into the socket. If you encounter any resistance, stop. Do not force the Board. You might have a bent pin that requires repair by a Radio Shack technician. 7. Snap each stand-off into the corresponding hole on the expansion board by applying pressure to the Modem Board. Secure the holder to the Modem Board with the supplied screw. You are now ready to install your Modem/expansion combination board onto the computer's main circuit board. INSTALLING THE COMBINATION BOARD IN THE COMPUTER WARNING: TURN OFF YOUR COMPUTER AND DISCONNECT ALL EQUIPMENT. If any unit is on, you can damage the central processing unit or the board. Wait at least 10 seconds before removing or inserting any board into the computer. 1. Be sure to touch a grounded metal object before beginning the installation, and do NOT stand on a carpeted floor. 2. Remove the computer cover by unfastening the screws and sliding it toward the front of the unit. 3. Rotate the main unit so that the rear panel faces you. Select one of the unused slots and remove its slot cover by unfastening the screw. Store the removed slot cover for future replacement. 4. On the main circuit board, directly behind the slot cover, is a thin edge connector slot. 5. As you look at the computer from the rear, check the upper right corner of the main circuit board for a small, multi-pronged metal connector. If your board does not have the connector, remove the short wire attached to one corner of your memory board. You do not need it. If your board has the connector, do not remove the wire. You will connect this in step 8. 6. Touch a grounded metal object. 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 the slot covers are mounted. At the same time, apply downward pressure evenly, engaging the Edge Connector in the socket. 7. Align the board's bracket so that the cutout is positioned over the screw hole. Replace the screw you removed earlier. Do not overtighten it. 8. If you did not remove the wire mentioned in Step 5, fasten the free end of it to one prong of the multi-prong connector. 9. Replace the computer's cover, securing it with the screw previously removed. INSTALLING THE MODEM BOARD IN THE TANDY 1000 EX The second bracket B in your PC Modem Package is specially designed for use with the Tandy 1000 EX. If you plan to install the Memory PLUS Expansion Adapter (250-1062) when you install your PC Modem or if the Memory Board is already installed, the Modem Board must be mounted on that board. If, however, you will not be installing an additional board, the Modem Board can be mounted directly on the computer's main circuit board. To install the Modem Board only: 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 and slide the cover toward you. 3. Remove the option slot cover on the rear panel by removing the 6 plastic screws. 4. Attach bracket B to the Modem Board with the phone jacks extending through the cutout. From the bottom of the board, insert and tighten the 2 bracket screws (shorter ones) provided with the Modem Board package. 5. Carefully align and lower the Modem Board's pin socket on the pin header on the computer's main circuit board as shown above. Ledges on the computer will help secure the board once installed. 6. Secure bracket B to the computer's rear panel. Align 1 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 Board package, then tighten. 7. Snap off 1 segment of the rear panel's break-away type slot cover and at- tach the remaining part of the cover to the rear panel. Align the cover holes with the 4 holes on the panel above the Modem Board bracket and in- sert the plastic screws that you removed earlier. To connect the Modem Board to the Memory 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 Board. Be sure to touch a grounded metal object to discharge any static electricity. 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 and slide the cover toward you. 3. Remove the option slot cover on the rear panel by removing the 6 plastic screws. 4. First, attach the memory board's bracket as described in the board's in- stallation guide. Carefully align and lower the board's pin socket on the pin header on the computer's main circuit board. 5. Secure the bracket to the computer's rear panel with the screws provided in the Memory Board package. 6. Attach bracket B to the Modem Board with the phone jacks extending through the cutout. Carefully align and lower the Modem's Board's pin socket onto the shorter of the 2 pin headers on the Memory Board. 7. Secure bracket B to the rear panel with the screws provided in the Modem Board package. 8. Snap off 1 segment of the rear panel's break-away type slot cover and at- tach it to the panel with the plastic screws you removed earlier. NOTE: When the board(s) are completely seated and parallel, check that all pins are fully inserted into the socket. Do not force the board. The shroud on the pin header is useful when aligning the pin connectors. (css 07/29/93) (smc-09/14/93)