Harman Kardon TC600 Owners Manual - Page 34
Fan reversal for multiple amplifier installations
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Fan reversal for multiple amplifier installations In some installations, it may be desirable to mount two or more TC Series amplifiers one after another in a line. You can reverse the fan in any amplifier to reverse the direction of air flow through the tunnel; this enables you to prevent the warm air from the first amp from being vented into the tunnel of the second amp. and so on. From the factory, the fan pulls air through the tunnel and exhausts the warm air at the fan end when music is playing. This direction of air circulation provides the best Icooling for a TC Series amplifier. Leave TC304 screw locations the amplifier(s) that will be driven the hardest (usually the bass frequencies) in the factory configuration, and only reverse the cooling direction on the amplifiers with the lighter load. Note: In the factory configuration, the fan hub label is positioned toward the outside of the amplifier. To reverse the direction of the air flow, the fan itself must be reversed in its mounting (the fan is electrically controlled, and simply reversing power to the fan will not change its direction). Contact any authorized Harman Kardon installer or service center to perform the fan reversal, and take this manual with you. To reverse the direction of air flow through the tunnel: I . Carefully remove the screws attaching the fan end cap of the amplifier (see illustration for location of screws). 2. Gently remove the end cap just far enough to allow removal of the fan from its mounting pins in the end cap. DO NOT REMOVE THE WIRES. 3. Flip the fan assembly 180° so that it faces in the opposite direction. Make sure the rubber insulation pads are still in place on both sides of the fan. The wires are attached to the circuit board, and the fan stays with the end cap, so be careful not to stretch or damage the wires. 4. Replace the end cap assembly and screws. DO NOT OVERTIGHTEN THE SCREWS. TC600 and TC300: 5 large, 1 small RCA TC304: 5 large, 2 small RCA