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Family Tips: correct operation of the audio system switches
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A stereo system is composed of many independent units consisting of audio, such as: tuner, deck, equalizer, LD or VCD machines and machines such as AV amplifier. These units require 220V AC power supply plug inserted in the board. It was for the convenience and save time, when the latch off the power turned off a pull to all; boot is opened to all the power of the bolt. This method, although you will, but there are hidden dangers. Because this action will generate anti-peak surge current and voltage, the two shocks tend to damage the audio equipment. Some damage to equipment or shut down most of the moment in the boot production, and work well in the normal state of non-damaged. Inrush current: a hi-fi equipment are made of resistors, capacitors, inductors, transformers and other components of the composition. They are in a cold state before starting the next. Switched on, the resistor is small, so large instantaneous current is 2.5-3.5 times the normal operating current. This current is called inrush current, which can cause damage to the circuit. Peak inverse voltage: inductors, transformers and other units have a feature that is added in the circuit when a voltage or a voltage removed, the unit will generate a counter-electromotive force to prevent the voltage changes. So when a voltage is applied to the boot when the inductor, it creates a back-EMF voltage to prevent the establishment of the energy stream, but the supply voltage, so the back-EMF is a voltage from the damping effect on the circuit has little effect. However, the situation is different shutdown, when the shutdown, the circuit generates a back EMF does not have any block, the voltage is the peak inverse voltage, which is 9 times the normal voltage. Although it is little current, but voltage is high, causing a shock on the device. Therefore, every audio unit and anti-peak voltage surge current are simultaneously acting on the audio equipment to create a big impact, easy on the equipment damage. This country, the audio unit is best to order one at a startup and shutdown. Boot sequence is correct audio signal flow in accordance with the direction of power: in order to open deck, CD drive, LD machine or VCD, tuner, equalizer, and finally open the power amplifier. The proper shutdown sequence is to turn off the amplifier, then close the other equipment Currently, in order easy to use, there is a delay of foreign invention power plug board. The first group is directly connected socket switch socket; second access port, when the way the machine is switched on, may delay 1s (seconds) before power; the third group received jack, when the way the machine is switched on, can be extended to When 2s (seconds) before power; fourth group received jack, when the way the machine is switched on, until power could be delayed 3s. Shutdown is similar, too, at different times off the power. This prevents inrush current and peak inverse voltage on all devices simultaneously at the expense of the phenomenon of audio equipment.

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