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Фрагмент инструкции
Also take care to exhaust the heated air away from the front panel intakes, so as not to recirculate and reheat the same air over and over again. In a rack system, make sure there is a significant source of fresh air to the rack. This can be achieved with air conditioning vents to the top of the rack, an open back that is well ventilated, or rack panel fans/vents. In the case of rack panel fans/vents, the cooling will be most effective when the amplifier(s) are located as far away from the fans/vents as possible, to prevent air recirculation i.e. amplifiers at the bottom, fans/vents at top. Allow a minimum of 3” clearance in the front and back of the amplifier for adequate ventilation. When installing equipment in a rack, take care that the weight is distributed evenly. Hazardous conditions may be created by uneven weight distribution. POWER/THERMAL REQUIREMENTS For your convenience in planning for sufficient power and cooling in the amplifier environment, we have included AC mains current draw and thermal dissipation values in the Specifications Sheet. The specifications listed are for idle (no signal), 1/8th power (“normal operating conditions” for continuous voice or music), and 1/3rd power (worst-case hard-clipped music) for an amplifier with both channels driven. The thermal dissipation specifications indicate how much heat will have to be removed from the amplifier environment under the three different conditions. NOISE The SR2300/2800 exceeds all relevant international emissions and immunity standards, and has further been specifically designed to minimize interference in Pro-Audio environments. Regardless of this fact, amplifiers consume, process and deliver significant amounts of power over a wide frequency range. Standard practice calls for caution to be exercised in the placement of signal cables and signal-level components such as mic preamps, tuners, etc., to avoid inducing noise in the low level circuitry. Possible sources of noise are: AC current in shared power lines, magnetic interference between adjacent rack-mount units, high current audio speaker cables. In general: Avoid: Mounting sensitive signal processing equipment directly above or below amplifiers. Sharing AC power outlets between amplifiers and signal processing equipment. Bundling signal cables with speaker cables or AC power cords. ! AC LINE Connect the unit to a properly rated supply circuit. The SR2300/2800 can be configured to operate within the following AC mains voltage ranges: 100-140VAC, 50-60Hz (115VAC, 60Hz typ.) 200-265VAC, 50-60Hz (230VAC, 50Hz typ.) Connection is made by 14 gauge, IEC type 320, grounded line cord. For safety considerations only a properly grounded (earthed) receptacle should be used. If a grounded circuit is not available, do not break off the ground pin; use the proper adapter plug for a two wire receptacle. The AC mains fuse is accessible at the rear panel of the amplifier. If this fuse blows replace it only with the same type and rating fuse. The correct replacement fuse value is printed on the rear of the amplifier, and on the specifications page. – 12 – AUDIO GROUND CHASSIS/FLOAT SWITCH In general, the Audio Ground of each amplifier should be connected to AC mains earth ground AT ONE POINT ONLY- either through the Chassis (by selecting the "Chassis" position) OR through the input cable (with the switch in the "Float" position, and pin 1 of the XLR or the sleeve of the 1/4" connected to the ground of the signal source unit.) The Chassis/Float switch can be used as a means to troubleshoot ground loop problems, or to verify wiring. Ground loops are characterized by a hum or buzz through the speakers, and occur when multiple paths exist for a given ground circuit. This switch allows the Audio Ground to be temporarily "lifted" or "floated" from the chassis, so continuity tests can be made to verify or reverse-engineer a grounding system. The following information will be useful when planning or troubleshooting system wiring: • The chassis is permanently conected to the earth (safety) ground pin of the Mains power connector. • The Audio Ground of each SR2300/SR2800 is permanently connected to the black terminals of both output binding posts, to pin 1 of each XLR input, and to the sleeve of each 1/4" input. • The XLR shell is permanently connected to chassis. • With the Chassis/Float switch in the "Chassis" position, the Audio Ground will be connected to the Chassis and AC mains earth ground. This connection is made through a 0. resistor (R350) located on the input board. The resistor serves as a fuselink in the case of severe system faults. To check this resistor, remove all connectors from the amplifier and disconnect the AC main plug. With the switch in the "Chassis" position, use an ohmmeter to measure the 0. resistance between the earth ground pin of the AC mains plug and Audio Ground at either black terminal of the output binding posts. • By selecting the “Float” position, the Audio Ground is not...
Эта инструкция также подходит к моделям:Автоусилители - SR2300CE (4.18 mb)
Автоусилители - SR2800 (4.18 mb)