Multimedia speakers as computer sound equipment, is a relatively low technological content of products, but its failure rate is relatively high and fault mostly concentrated in power amplifier block and a power supply part, below the author combined with own experience about multimedia speaker of the common faults and maintenance repair methods, hoping to be helpful to everyone.

Part of the power failure in general transformer and rectifier circuit, transformer short circuit, fuse circuit, rectifier tube breakdown; failure phenomenon or the silent sound of exchange, endanger among them the biggest is short circuited transformer, which will enable transformer temperature rise sharply until burned, and even lead to a tank fire. If the rectifier tube breakdown short circuit will lead to more than two short circuit, therefore, in the case of sudden silence when the speaker should immediately turn off the speaker power, to find out the failure to try again. Transformer only need to change can be the same model, the rectifier can generally be direct substitution, fuse is easier and more for a can.

If the fault in the power amplifier section, the phenomenon is more: there is the exchange of sound, silence, only one vocal tract, noise, etc.. Because now most speakers integrated amplifier function, so the circuit is simple, and the power amplifier block are generally metal backboard is fixed at the back of the speaker, it is useful in the heat, is also very good looking. If the power amplifier block has a fault, the boot after the temperature will increase, so the metal backboard will be very hot, even hot. Encountered such problems for a power amplifier block can generally be resolved.

If the speaker's power is larger, the audio output section will be placed in a protective circuit to prevent excessive damage to the speaker. In fact, this circuit is a few ohm or a few ohm resistor, when the volume is too large, the temperature of the resistance will increase, to a certain extent will be burned off, to protect the role of the speaker. Because the resistance is very small, so if there is no suitable, instead of a piece of wire can be used, but it is recommended with the same type of resistance, unless you have no use for large volume. Otherwise, you just wait for the horn.

Speaker failure is relatively rare, because most of the power of multimedia speakers are not very large, but do not rule out the possibility of. If the speaker sounds more noisy, and accompanied by noise, while the circuit part of the trouble, you can determine the speaker is the problem, then only change the speaker.

These fault is judged by observing, and other types of fault analysis requires some circuit analysis techniques the, so if you are not familiar with the electronic technology, through the above "look, smell, ask," the law, first diagnosis of speakers which part of a problem, and then find someone to repair.