150 MB SCSI Tape Cartridge (250-4169) Installation Faxback Doc. # 5184 PACKAGE CONTENTS In addition to this installation manual, the 150 MB SCSI Tape Cartridge System kit includes: * The streaming tape drive. * Four rubber grommets and four shoulder screws for installing the tape drive in the middle driver slot of a Tandy 3000 or Tandy 4000. (These are not required for a Tandy 3000 HL installation.) * A SY-TOS Tape Operating System and manual. CAUTION: Static electricity can destroy integrated circuits. Be sure to discharge any built-up static electricity by touching a grounded, metal object before handling the tape drive or any of the computer's logic boards. If you have any doubts about you ability to install this drive, contact your local Radio Shack store for the location of the service center nearest you. Having the driver installed by Radio Shack service technicians not only ensures expert installation, but also enables the technicians to check that all your equipment is in proper working order. NOTE: If you are installing the 150 MB SCSI Tape Cartridge System in a Tandy 3000 HL, you must first install the Universal Mounting Kit that is provided with the 3000 HL computer. Refer to the Universal Mounting Kit manual for instructions. REMOVING THE COVER Remove the system unit cover to access the computer's internal components by following these steps: 1. Be sure your computer and all peripherals are turned off. Disconnect the power cord from the back of the computer. 2. Remove the three large cover-mounting screws from the computer's back panel. Remove the cover by sliding the entire housing toward the front of the computer. The cover removal procedure is illustrated in the Installation and Operation manual supplied with your computer. NOTE: If your computer has a fan in the front of the unit, the removal and replacement of the cover may be simplified by first removing the fan filter. To remove it, unfasten the Velcro tab that secures the filter to the bottom on the unit housing, and pull the filter straight down. Be sure to replace the fan filter after you have completed the installation. REMOVING THE LOAD RESISTOR If your computer is a single-floppy-based Tandy 3000/4000, a load resistor might be attached to the side of the bottom drive slot. Pull apart the white cable connector to disconnect the load resistor from its cable. Now, remove the two screws that secure the load resistor from its cable. Now, remove the two screws that secure the load resistor to the side of the drive tower. Remove the load resistor and store in a safe place. (If you ever remove the tape drive(s) from your computer, you must reinstall the load resistor to reconfigure it as a floppy-disk-only system.) NOTE: It is not necessary to remove the load resistor for a Tandy 3000 HL installation. INSTALLING THE TAPE DRIVE The procedure varies for installing a Tandy 3000/4000 tape drive or a Tandy 3000 HL tape drive. Use the appropriate procedure below to install the tape drive in your computer. TANDY 3000/4000 If you are installing the tape drive in a Tandy 3000 or Tandy 4000, install the four grommets that come with this tape drive kit in the mounting holes in the second drive slot of the computer's driver tower. Now, slide the tape drive into the middle slot of the computer's driver tower. Avoid letting the drives slide against one another as you install the tape drive. Use the four shoulder screws provided with the tape drive kit to secure the drive to the drive tower. (See Figure 2.) You are now ready to install the host adapter board and complete all connections. Proceed with the "Connecting the Cable to the Host Adapter Board" section of this manual. Tandy 3000 HL To install a tape drive in a Tandy 3000 HL, follow the instructions in the Universal Mounting Kit manual provided with your computer. Attach the two mounting brackets and four shock isolators provided with the Universal Mounting Kit to the bottom set of mounting holes along the sides of your tape drive. Refer to the installation instructions that come with the specific drive. You are now ready to install the host adapter board and complete all connections. Proceed to the "Installing the Host Adapter Board" section of this manual. If a hard drive has been installed in your computer, the mounting brackets are already in place. In this case, remove the bracket/tape drive assembly. Then, follow the instructions in the Universal Mounting Kit manual to attach the drive to the brackets. Now, slide the bracket/tape drive assembly into the computer's drive tower. Use the four shoulder screws provided with the tape drive kit to secure the bracket and drive(s) to the drive tower. You are now ready to install the host adapter board, and complete all connections. Proceed with the "Connecting the Cable to the Host Adapter Board" section of this manual. CONNECTING THE CABLE TO THE HOST ADAPTER BOARD CAUTION: A low humidity environment and walking on carpeted floors, among other things, can build up you static electricity. Discharge any built-up static electricity by touching a grounded, metal object before beginning this procedure. The host adapter board is difficult to access after it is installed. Therefore, you should set the jumpers and connect the cables to the board before it is installed. To make the correct jumper settings, follow the instructions in the Tandy 16-bit SCSI Adapter Installation Manual provided with the host adapter board. NOTE: For the purposes of this manual, the ends of the 50-pin SCSI bus data cable are defined as follows: The "drive end" is the SCSI bus data cable with two connectors situated close together, and the "host end" has only one connector. Connect the "host end" of the SCSI bus data cable to the connector J2 on the host adapter board. Be sure the arrow on the SCSI bus data cable meets with Pin 1 on the J2 connector. INSTALLING THE HOST ADAPTER BOARD Now, you are ready to install the host adapter board by following these steps: 1. Select an empty, full-size option slot in which to install the host adapter board. In order to make the SCSI bus data cable easily reachable, it is usually best to install the board in one of the two option slots closest to the drive tower. 2. Before installing the host adapter, you must remove the slot cover on the computer's back panel. Remove and save the screw from slot cover. Then, tilt the cover away from the opening and lift it out. 3. If the slot you have chosen causes the SCSI bus data cable to reside between two PC boards, fold the cable so its flat side is parallel to the board's width. Then, at the top of the board, fold the cable again in a 90-degree angle. 4. Slip the front edge of the host adapter board into the plastic card guide at the front of the computer, and insert the board's metal mounting bracket into the option slot opening. As you slide the board down the card guide, avoid letting the SCSI bus data cable touch any adjacent PC boards. Push the board's edge connector firmly into the option slot socket, making sure the board is fully seated. 5. Use the screw you removed previously to secure the host adapter board's mounting bracket to the back panel of the computer. COMPLETING THE HARDWARE INSTALLATION Connect all internal tape drive cables to complete the drive installation. Do not force the cables as you connect them. They are keyed to connect in only one way. Try not to twist the cables. The easiest way to assure the tape drive cables lay flat is to thread them under the power cables. 1. Disconnect the main power cable from the main logic board by pressing in on the tabs as you lift the connector. 2. Attach the "drive end" connector of the SCSI bus data cable to the tape drive. The white dot on the tape drive connector identifies pin 1. 3. Connect the 4-pin power cable to your internal tape drive. These power cables are identical, and can be connected interchangeably to any internal drive. 4. Reconnect the main power cable connector to the main logic board. 5. After all internal cables have been connected properly, replace the cover. With the lip of the cover under the lower rail on the system unit's frame, slide the entire housing toward the back of the computer. Replace the cover mounting screws in the computer's back panel. Replace the fan filter if it has been removed. 6. Reconnect all peripheral cables to the appropriate connectors on the back of the computer. Reconnect the power cable. TECHNICAL INFORMATION * The 150 MB SCSI Tape Cartridge System is a true half-height tape drive with embedded formatter. * The system is compatible with the industry-standard (ANSI) SCSI host interface. * The system has automatic gain control to compensate for variations in the signal. * The system automatically uses reference bursts to position the read/ write head to within 0.001" of the center of the first track. * The system compensates for track misalignment by automatically resetting the read/write head position, and re-reading the tape. * The standard configuration is set to SCSI ID 2 with the terminators installed. Other settings for the system are explained in the following paragraphs. (smm/jej-05/12/94)