mercredi 5 mars 2014

All You Need To Know Pertaining Amplifier Repair

By Lisa Williamson

You will not enjoy clear music if the amplification mechanism of your system is faulty as it will give poor output. The purpose of having an amp in a sound system is to raise the level of the signal to a point suitable for the output component which can be a loudspeaker or headset. If you are receiving a weak sound from your speaker, the problem is emanating from the amp and troubleshooting is supposed to be done. Amplifier repair will also be done in a situation where the sound received from the system is distorted or there is none at all.

Normally, it is easy to troubleshoot amplification systems since most of them are constructed in a way that you can view all internal components and identify the faulty one. A number of steps are followed in accomplishing repair of an audio system. The first thing is to unplug the device from the wall and place it on a spacious table.

Screw driver is utilized in loosening the covers so that they can be removed. Complicated methods of troubleshooting are applied once the technician cannot identify any burnt component using his eyes. An odor will be noticed if there is a burned transistor and the system is opened immediately it stops operating.

Use the service manual provided by the manufacturer to identify the power transistors. While the power is on, a multimeter is used to check whether there is voltage in the pins of the transistors composing the device. The same should be done for all power ICs identified. The repairer will look for the fuse and test it for continuity.

Once the power supply is tested and found to be working, troubleshooting proceeds to the next stage. This involves finding out whether there is any component in the other sections that is faulty. A freezer is used to spray the components, one after another, with a short burst. The system is then put on and the component that is last frozen before the device begins to function is the faulty one.

A faulty element is removed using heat from a gun to melt the solder holding it in place. A needle nose pliers is the suitable tool to apply in puling the pins out of the board. Remove the screws holding the board in position so that you gain access of all sides. Cleaning of the holes left on the board is done through utilizing a solder wick.

The technician uses the manual to identify the component so that he replaces it with its equivalent. The position as well as orientation of the element should be maintained and the pins should always be straight. A side cutter is supposed to be used in trimming the excess pins once the solder has been applied.

Once replacing a spoiled component is finished, the board is fastened back to its position. The device is then plugged in and the power turned on. If the system is confirmed to be working as required, the power is put off and the covers replaced.

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