Important Information Includes safety information, memory installation and battery replacement instructions, and regulatory agency information for your iMac Safety Instructions for Setting Up Your Computer When you set up your computer or device, keep these important safety instructions in mind. Plugging In the Power Cord Important Your computer or device has a three-wire grounding plug that will fit only a grounded AC outlet. If you are unable to insert the plug in the outlet, contact a licensed electrician to replace the outlet with a properly grounded outlet. The plug on the power cord must be completely inserted into the computer's power socket and firmly seated for your computer to operate correctly. Important Connecting a Phone Line to the Modem Port Make sure you connect the modem to an analog phone line, the kind typically used in homes. Important Disconnecting Power The only way to completely disconnect power from the computer is to unplug the power cord from the outlet or from the back of the computer. Important General Safety Instructions For your own safety and that of your equipment, always take the following precautions. Disconnect the power plug (by pulling the plug, not the cord) if any of the following conditions exists: m you want to remove any parts (leave the cord disconnected as long as the cover is off ) m the power cord or plug becomes frayed or otherwise damaged m you spill something into the case 2 m m m m your computer or device is exposed to rain or any other excess moisture your computer or device has been dropped or the case has been otherwise damaged you suspect that your computer or device needs service or repair you want to clean the case (use only the recommended procedure described later) Be sure that you always do the following: m Keep your computer or device away from sources of liquids, such as washbasins, bathtubs, shower stalls, and so on. m Protect your computer or device from dampness or wet weather, such as rain, snow, and so on. m Read all the installation instructions carefully before you plug your computer or device into a wall socket. m Keep these instructions handy for reference by you and others. m Follow all instructions and warnings dealing with your system. Warning Electrical equipment may be hazardous if misused. Operation of this product, or similar products, must always be supervised by an adult. Do not allow children access to the interior of any electrical product and do not permit them to handle any cables. To clean the case, do the following: 1 2 Disconnect the power plug. (Pull the plug, not the cord.) Wipe the surfaces lightly with a clean, soft cloth dampened with water. Important Do not use any substance containing isopropyl alcohol or damage to the plastic will result. Warning Never push objects of any kind into this product through the openings in the case. Doing so can cause a fire or a dangerous electric shock. 3 Installing Memory and Replacing the Backup Battery This section provides information about memory and the backup battery and explains how to install them. Apple Computer recommends that you have an Apple-certified technician install memory. Apple does not provide telephone support for memory upgrades. Consult the service and support information that came with your computer for instructions on how to contact an Apple-authorized service provider or Apple for service. If you install these items yourself, you risk damaging your equipment, and this damage is not covered by the limited warranty on your computer. See an Apple-authorized dealer or service provider for additional information about this or any other warranty question. Warning About Memory Your computer contains two types of memory--dynamic random-access memory (DRAM) and video memory. You can add DRAM to your computer in packages called Small Outline Dual Inline Memory Modules, or SO-DIMMs. The following illustration shows the locations of memory slots on the logic board. See the sections that follow for important information about DRAM and video memory. Video memory slot (your computer has a DIMM already installed in this slot) Upper DRAM slot Lower DRAM slot (hidden under the processor card; your computer has a DIMM already installed in this slot) DRAM Configurations Your computer comes with a 32 megabyte (MB) SO-DIMM pre-installed. You can increase your computer's DRAM up to 256 megabytes (MB) by adding SO-DIMMs to the two RAM DIMM slots on the main logic board. 4 To increase the memory to the maximum of 256 MB, install a 128 MB DIMM in the user-accessible upper expansion slot. Have a 128 MB DIMM installed in the lower slot. To maintain your Apple warranty, the DIMM in the lower slot must be installed or removed by an Apple-authorized service provider. For more information about the type of SO-DIMMs you must use, see the technical specifications in your online information, About Your iMac, available via the Help Center in the Help menu. This computer uses Synchronous Dynamic Random-Access Memory (SDRAM) SO-DIMMs. DIMMs from older Macintosh computers are not compatible with your computer and should not be used even though they may fit into the RAM DIMM slots. Important Video Memory Configurations Your computer comes with a total of 6 MB of Synchronous Graphic RAM (SGRAM) video memory; 2 MB are built into the logic board and 4 MB are in the video memory slot. About the Backup Battery If you have intermittent problems starting up your computer and the date is reset, you need to replace the lithium backup battery in the computer. Replacing the battery may cause some settings on your computer, such as the desktop patterns, to revert to the factory default settings. You may also have to restore modem settings in any communication programs you are using. Important Make a note of the settings before you replace the battery. Installing Memory or Replacing the Battery Follow these instructions to install additional memory or replace the backup battery. Before installing any of these items, carefully read "About Memory" on page 4 and "About the Backup Battery," above. Important Installing additional memory and replacing the backup battery involves four procedures: m Turning off the computer m Opening the computer m Inserting the memory module into a specific slot or replacing the battery m Closing the computer 5 Turning Off the Computer 1 2 If your computer is turned on, turn it off by choosing Shut Down from the Special menu. Unplug all the cables from the computer, including the power cord. Warning If your internal modem is connected to a telephone line, make sure you disconnect the telephone line from the internal modem port before you open the computer's cover. This prevents electric shock. Now go to the next section, "Opening the Computer." Opening the Computer 1 If the computer is secured, unlock it by removing the security cable from the handle. For more information, see the online documentation that came with your computer. Place a soft towel or cloth on the desk or surface. Holding the handle with one hand and the front of the computer with the other, slowly lift up and turn the computer so the screen is facing down on the cloth. Remove this screw. Use this handle to remove the plastic cover by pulling it away from the computer as shown. 2 3 Place a soft, clean cloth under the monitor. 4 Use a Phillips screwdriver to unscrew the screw on the lower back cover. Do not use a powered screwdriver. It may damage the screws on your computer. Grab the small plastic handle on the cover and pull the cover away from the computer. Set the cover aside. 5 6 6 7 Touch any exposed metal on the logic board/drive assembly. Touch the metal part of the logic board/drive assembly. This helps protect the computer from damage caused by electrostatic discharge. Always do this before you touch any parts, or install any components, inside the computer. To avoid generating static electricity, do not walk around the room until you have completed the installation of the memory or replaced the battery and closed the computer. Important 7 8 Remove one of the cables from underneath its clamp, then unscrew the thumbscrews connecting the cable, and disconnect the cable. Release the cable that is underneath this cable clamp. Remove this cable by unscrewing these two thumbscrews. 8 9 Disconnect the two cables connected to the main logic board and move them aside. Release this catch by pressing on it. Disconnect these two cables. Remove the plastic bracket from around the 15-pin connector. The bracket should stay attached to the cable. 9 10 Use a Phillips screwdriver to unscrew the two screws inside the plastic handle. Remove the two screws located inside the plastic handle. Use the plastic handle to remove the logic board/drive assembly by gently pulling it straight up and completely out of the computer. 11 12 13 With one hand on the plastic handle, gently pull the handle straight up and out of the computer. Lay the logic board/drive assembly on a clean surface. If you moved around the room at all, you may have generated some static electricity. Touch any exposed metal on the logic board/drive assembly. This helps protect the computer from damage caused by electrostatic discharge. Now go to the next section, "Installing Memory" on page 11 or "Replacing the Battery" on page 14. 10 Installing Memory 1 Carefully remove the metal shield. Carefully unsnap the shield on both sides and lift it off. 11 2 To install a DRAM DIMM, align it in the DRAM slot as shown below and push the DIMM down until it snaps into place. Important Do not touch the DIMM's edge connectors. Handle the DIMM only by the other edges. The SO-DIMM is designed to fit into the slot only one way. Align the notch in the DIMM with the small rib in the slot and insert the DIMM at an angle, as shown. Snap the DIMM into place by pushing down on it until it is lying flat and parallel to the main logic board. Your DIMM's shape and components may look different. To remove the SO-DIMM, spread the two arms of the memory slot apart slightly. The DIMM will pop up. 12 3 Replace the metal shield. Snap the shield back into place. Now go to the section "Closing the Computer" on page 15. 13 Replacing the Battery 1 Remove the top cover of the battery holder. You may need to use a small screwdriver and insert it into the notch on the side of the cover to gently pop the cover off. Important Do not touch the screwdriver to any part of the main logic board. To replace the battery, remove the top cover of the battery holder. You may need to use a small screwdriver inserted into the notch on the side of the cover to gently pop the cover off. Be sure not to touch the screwdriver to any part of the main logic board. 2 Remove the old battery, noting the orientation of the positive and negative ends of the battery. Batteries contain chemicals, some of which may be harmful to the environment. Please dispose of used batteries according to your local environmental guidelines. Important 3 Insert the new lithium battery, with the positive and negative ends in the correct orientation. Installing the battery incorrectly may cause an explosion. Use only the same type of battery or an equivalent battery recommended by the manufacturer. For more information, contact an Apple-authorized service provider or Apple. Important 14 4 Replace the cover of the battery holder. Now go to the next section, "Closing the Computer." Closing the Computer 1 With one hand on the plastic handle, gently lower the logic board/drive assembly straight down into the computer until it is in place. Use the plastic handle to lower the logic board/drive assembly straight down into the computer until it is seated. Reinsert the two screws located inside the plastic handle. 2 Use a Phillips screwdriver to screw the two screws back inside the plastic handle. 15 3 Reconnect the two cables to the logic board, attaching them as shown. Reconnect these two cables. Reposition the plastic bracket over the 15-pin connector. 16 4 Reconnect the third cable, tucking it underneath the clamp, then tightening the two thumbscrews. Tuck the cable back into place underneath the clamp. Reattach this cable and tighten the two thumbscrews. 17 5 Replace the cover, making sure it snaps into place. If the cover doesn't fit properly, check the cable connections to make sure the cables are layered properly. Replace the plastic cover. Be sure to snap the cover back into place all around its edges. Reinsert this screw. 6 Use a Phillips screwdriver to screw the screw back on the lower back cover. Do not use a powered screwdriver. It may damage the screws on your computer. If necessary, to secure your computer, place the security cable through the handle and lock it. For more information, see the online documentation that came with your computer. Reconnect the cables and power cord you ...