User manual ELECTRO-VOICE 670A SERVICE DATA

[. . . ] A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. I the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. [. . . ] The amount of heat resulting from power dissipation might remain inside of a rack-shelf and needs to be diverted using appropriate measures. The tables on page 31 allow the determination of power supply and cabling requirements. The tables are meant as auxiliary means for calculating temperatures inside of a rack-shelf system/cabinet and the ventilation efforts necessary. The column Pd lists the leakage power in relation to different operational states. the column BTU/hr lists the dispensed heat amount per hour. Power consumption is direct proportional for other mains voltages. The following conversion factors are meant for easy conversion: 100V = 2. The Mains Switch on the front panel separates the power amp from the mains. Turning the Mains Switch to ON starts booting up the power amp. A soft start circuit compensates mains inrush current peaks and thus prevents triggering AC mains fuse when switching on the amplifier. Speaker system switch-on is delayed by approximately 2 seconds via output relays, effectively suppressing any possible power-on noise, which otherwise might be heard through the loudspeakers. When operating the power amplifier together with other equipment in a rack case, setting the switch to the GROUNDED position is recommended. Set the switch to UNGROUNDED, when the power amplifier is operated together with appliances with differing ground potentials. The Hi-Pass filter (50 Hz, 18 dB/oct) allows effective attenuation of low frequency audio signals, which could cause saturation problems with connected output transformers. Following table shows possible switch settings and corresponding delay times. The MODE switch on the power amp`s rear panel defines how the audio inputs handle the input signals. In DUAL mode, the two channels of the power amplifier work independent from each other. This mode of operation is being used for all 2-channel applications, like stereo operation. Using the input level controls on the power amp's rear panel allows independently adjusting the channels' amplification. Using the input level controls to independently control the amplification of the two channels is still possible because only the channels' inputs are linked. PARALLEL operation is the mode of choice, whenever the same input signal drives multiple power amp channels of a large system installation. In BRIDGED mode both amp channels work in push-pull operation to provide doubled output voltage. [. . . ] CAUTION: Each address may exist only once in a system. Address 0 (00 hex, delivery status) disables remote communication between the RCM-810 and the bus. The module does not appear in the system, even though it is physically connected to the CAN-bus. 2 STATUS LED The STATUS-LED is for monitoring the communication on the CAN bus. [. . . ]