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Resumen del manual
Your Adcom dealer can help select the best cable for your needs. (See CONNECTING THE GFA-7000 for more information). O RR, LR, R, C, L Outputs The GFA-7000’s connections to the loudspeakers are made through high-grade, 5-way, gold-plated binding post terminals. There are two terminals for each speaker, which are colored RED for the positive (+) output and BLACK for the negative (-) output. The binding posts will accept a variety of connector types; the most secure and prevalent of these is the “U”-type spade connectors (at least 0.25” wide and maximum width of 0.57”),. The terminal will also accept bare wire (up to AWG10) and “banana” type plugs (single or dual). Pin connectors are not recommended for use with Home THX® equipment. (See CONNECTING THE GFA-7000 for more information). O DB-25 Multichannel Audio Input Connector Input connections may be made with the optional DB-25 computer-type connector, which is a Home THX® certified option when your Home THX® controller is provided with a similar output connector. Using this type of connecting cable would override the need to use the RCA-type inputs (O). This mode of connection retains the same high level of signal transfer, simplifies the job significantly and insures automatic, correct connections to all channels. 3 O AC Fuse The AC Fuse protects the electronic circuits of the GFA-7000. This fuse, normally, will blow only if there is an overload within the GFA-7000. It may, however, blow if the amplifier attempts to deliver very high power into very low-impedance loudspeakers. In either case, BE SURE TO REPLACE THE AC Fuse ONLY WITH AN EXACT REPLACEMENT FUSE. The proper fuse values are: Fuse Rating BUSS® Littlefuse® For 115 volt operation.......15 Amp 250 Volt..............ABC-15/250V..........(3AG) 314015/250V For 230 volt operation.......8 Amp 250 Volt................AGC-8/250V...........(3AG) 312008/250V WARNING Before attempting to replace a blown fuse, be certain to unplug the AC Power Cord from the AC wall outlet to prevent possible electrical shock. Replace the AC Fuse only with one identical in type and rating as printed on the rear panel. DO NOT USE ANY SUBSTITUTE FUSES WITH DIFFERENT RATINGS OR VALUES. Failure to observe this precaution may cause serious damage to the amplifier circuits, MAY CREATE A FIRE HAZARD, AND MAY VOID THE WARRANTY. _ If the Power LED (0) does not glow, it may be an indication that the AC fuse has blown. If you are not sure, or the amplifier displays other symptoms, please consult the RESOLVING PROBLEMS section on page 11. To remove the fuse-holder cap, you will need a %” standard flat-blade screwdriver. Place the screwdriver in the recessed slot in the cap. Turn the cap 1/s-turn counter-clockwise (to the 10:30 position), until the cap pops out towards you. Grasp the cap with your fingers and pull it completely out. The fuse is inserted in the back of the cap; gently pull it free. Since the fuse has a ceramic body, you cannot visually examine the fuse element, it is therefore suggested that you replace it with an identical substitute or bring the fuse to your Adcom dealer so they may check its integrity. To replace the fuse, insert it in the back of the fuse-holder cap. Place the cap into the fuse-holder with the arrow 1/s -turn to the left of center (10:30 position). Place the screwdriver in the recessed slot, gently press in and turn 1/s-turn clockwise (to the 12 o’clock position) O AC Power Cord The AC cord provides power to operate all the GFA-7000’s circuits. Its plug can be connected to a standard wall outlet provided the outlet supplies a voltage compatible with the power requirements printed on the rear panel of the GFA-7000. The GFA-7000’s power cord is supplied with a “polarized” AC plug as required by UL/CSA standards and the National Electrical Code. To minimize the risk of electrical shock and to insure minimal hum from the system, do not defeat the polarity insuring feature of the plug (one wide blade and one narrow blade). To prevent electrical shock, do not use this polarized plug with an extension cord or AC outlet unless the blades can be fully inserted to prevent blade exposure. 4 FRONT PANEL 0 On/Off Switch The On/Off Switch controls power to the power transformer and circuits of the GFA-7000. Whenever the GFA-7000 is energized the Power LED (©) will glow. To turn the GFA-7000 on, press the push-button. It will remain in the “engaged” position while the unit is energized. To turn the GFA-7000 off, press the push-button in and release and it will move to the “disengaged” position. O Power LED This LED will glow whenever the On/Off Switch (©) is turned on and the GFA-7000 is energized. The Power LED indicates that there is AC voltage being fed to the amplifier, but it does not signify that all the amplifier’s circuits are in operation. If, for example, one of the Thermal Protection LED (©) glows, that amplifier channel will not produce sound even though the Power LED may still glo...