3900/3950HD/3950C (250-3580/86/87) Maintenance Faxback Doc. # 2697 The best maintenance you can perform yourself is preventive. Try to keep the computer as clean as possible. Avoid transporting or using it in dirty or dusty environments if possible. Use a clean container when you transport the computer. Be particularly careful to avoid getting dirt and dust in the floppy disk drive. Another obvious but very important point with such an easily transportable device is Don't Drop It. The computer is so light and easy to move you may be tempted to forget that although sturdy, it is still a sensitive electronic device. Although there is a good chance the hard disk would not be damaged, the impact could crack the case and damage other components. Try to keep the keyboard as clean and dust free as possible. Avoid spilling liquids on it at all cost. Remember you are spilling liquid into the computer, not just onto the keyboard if you're not careful. You can vacuum the keyboard with a small computer vacuum to remove dust buildup that can impede key motion. Always keep the port covers closed when you're not using the ports. This will prevent dust from getting into the connector ports and possibly affecting electrical contacts when you attach a device to the computer. You can vacuum the ports occasionally to keep them clean. CLEANING THE CASE If the computer case gets soiled you can clean it. Always make sure that the computer is turned off and the AC adapter is disconnected before you do anything else. You can clean the case with a soft, preferably lint-free, damp cloth. If necessary you can use a mild detergent. Avoid any cleaner that has abrasives in it and DO NOT use cleaning solvents or isopropyl alcohol-based products. Never spray anything directly onto the computer. Always spray onto a cloth and then wipe the computer with that. CLEANING THE LCD DISPLAY The LCD display panel is covered with glass. You can clean the glass if it gets dirty the same way you would clean a computer monitor screen. Use a lint free cloth and if necessary some commercially available screen or glass cleaner. It is better to avoid ammonia-based cleaners. CLEANING Turn off the computer and unplug the power cord from the AC outlet. Use a soft cloth or tissue and a mild cleaner. Do not use liquid or aerosol cleaners. A lightening symbol is intended to alert you to uninsulated dangerous voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock. A exclamation symbol is intended to alert you to important operating and maintenance (servicing) instructions in the literature accompanying the product. ADDITIONAL INFORMATION ABOUT YOUR TANDY NOTEBOOK COMPUTER For your convenience, we have loaded Microsoft MS-DOS onto your computer's hard disk and correctly entered all of the setup information. You can disregard all references in the Owner's Guide to installing the operation system. ALSO NOTE THE FOLLOWING: -The system uses a 25 MHz CX486SLC microprocessor. Disregard references to a 33 MHz option. -The system uses a 10-inch liquid crystal high resolution monochrome display. -The system comes with an 82-key OWERTY keyboard. Disregard references to an 83-key keyboard. -The soft carry case is not included with the product. -The docking station is not available for this computer. NOTICE FOR MOBILE USAGE When powering the notebook computer from a vehicle's electrical system, use only a UL Listed adapter that fits your vehicle's cigarette-lighter socket. ATTENTION The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of it's useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for recycling options or proper disposal. UNPACKING & CHECKING THE EQUIPMENT Before you start, prepare a clean stable surface to put the contents of your Notebook shipping container on. You should find the following items in the box: -The Notebook (With two Ni-Cd battery packs installed) -One AC Adapter -A Power Cord -This User's Manual Remove all the items from the container. If anything is missing or broken, inform your dealer and ask for a replacement. Please save the packaging in case you ever need to ship your Notebook or send it in for service. Before setting up the computer, familiarize yourself with the hardware features noted in the next section. PREPARING THE COMPUTER FOR TRANSPORT To prepare the computer for transport you should first disconnect any peripherals you have connected to it. Make certain the computer is turned off before you do this. After you disconnect any peripherals close the port covers to protect the connectors. The hard disk head in the computer is self-parking. You do not need to park it or otherwise prepare the hard disk for transport. Close the computer and check that the screen housing is latched securely to the computer. The computer comes with a soft carrying case. The supplied case will keep out dirt and dust and protect the housing from getting scratches. If you intend to use battery power be sure to fully charge the battery pack and any spares before leaving. Remember the adapter charges the battery pack as long as the adapter is plugged into the computer. IMPORTANT SAFETY INFORMATION Do not expose the computer to rain, moisture, excessive dust, or temperature extremes. Doing so could cause a fire or shock hazard. High voltage is present inside the computer. Do not remove the cover. An electric shock danger exists. Turn off the computer, unplug the power cord, and notify a qualified service technician if: -Liquid has been spilled into the cabinet. -The computer has been dropped. -Small metal objects, such as paper clips or staples that can cause a short circuit, have fallen through the ventilation slots. -The power cord or plug is damaged or frayed. -The computer exhibits a distinct change in performance. The computer is designed to be powered only from the type of power source indicated on the computer's ratings label. This computer is equipped with a three-prong AC power plug. This plug will only fit into a three-prong AC outlet. If you cannot insert the plug in the outlet, contact an electrician to have the outlet replaced. Do not negate the safety purpose of the plug. Never cut or break the third prong. The AC outlet must be near the computer and easily accessible. (smc-02/18/94)