How to fix the sound of the stereo? 10

Our speakers (including subwoofers) have a circuit board that amplifies the signal, which we often call it"Amplifier"...In addition to this circuit board, there is also a transformer, which is often called by the older generation"Fire Bull"It is generally separated from the circuit board, and only its output line is soldered to the circuit board. It mainly plays the role of power supply.

First of all, you check whether the inside of the power plug cable will be broken (you can use a multimeter)?If the plug wire is through, you check again to see if there is a fuse on the line to see if it is blown out. If it's all OK, let's move on to the following:

1) Measure whether the input and output windings of the transformer are not connected, if not, it means that the winding has burned out. The transformer with the same parameters needs to be replaced.

2) Measure whether each horn is passable, if not, it means that the speaker coil is burned. The horn with the same parameters needs to be replaced.

3) If there is a situation of burning the horn, it is very likely that the power devices related to your amplification circuit are also burned out, because there has been a large current, and you need to use a multimeter to measure the relevant parts of the circuit board until the bad parts are found and replaced. to be able to power on and try it out.

goodluck!

If you repair it yourself, use a multimeter to check whether the power supply is available, whether there is a problem with the connection line of the speaker, including the speaker, the input of the signal is the line connected to the computer to the audio, including the potentiometer, that is, the volume of the one, no problem, that is, the power amplifier chip is broken, this thing is not good, it is not easy to change, you have to use a hollow needle and a soldering iron to reluctantly change it. Generally, chips are not easy to break...

I repaired the same kind of fault yesterday, after falling down caused the speaker copper wire to break, because it can not be welded, replace the audio speaker, troubleshooting, I don't know if your fault is as above, open it yourself, see if the line has fallen off, rest assured, small problems,

Fainting. It's all written on it

Check the power supply part of the multimeter first, check the input voltage of each IC if there is no problem, check the power supply circuit if there is a problem, use the oscilloscope to check whether the power amplifier IC has an input audio signal, check if there is no problem, the audio input part, check the audio output, there is no proof that the power amplifier IC is broken, and if there is a problem, it means that there is a problem with the speaker (speaker).

The premise of self-repair is that you must be able to understand the circuit diagram, otherwise you will solve it for those professionals

First, remove the audio output source cable.

Use an AC voltmeter to measure whether there is voltage (or lick with your tongue in the case of low voltage to see if there is numbness).

If there is voltage, an acoustic problem is suspected.

If not, check whether the wiring is broken, or check the amplifier.

If it is an ordinary computer speaker:

1) The power plug of the speaker is not tight.

2) If you have a problem with your sound card, try it with headphones.

The speaker is loud and the speaker is not loudSolution 1: Swap the two pairs of wires connected to the speaker to listen to whether the speaker still does not sound. If the speaker still doesn't sound, the components in that speaker are damaged; If, after changing the cable, the original speaker that did not sound rings, and the speaker that originally sounded does not sound, it is that the computer audio and the previous part are faulty.

If both speakers sound after changing the cable, it means that the original cable is loose.

The speaker is loud and the speaker is not loudSolution 2: Check the connection cable from the computer to the computer audio, whether a wire is loose, or whether the plug is in poor contact, and plug it back in. Check whether the connection cable from the computer speaker to the speaker is in poor contact or loose.

If it still doesn't solve the problem, it means that there is a fault inside the computer speaker, or there is a fault with the computer sound card.

Speaker one rings and one does not sound Solution 3: If it is a problem with the setting of the lead wide sound card, please open the setting interface of your sound card in the control panel (or double-click the small speaker icon of the system tray), check whether the channel balance is in the middle, if not, please adjust the left and right channel balance to the middle.

Speaker with a non-sound solution 4: If the setting is fine, it may be a sound card hardware failure, sound card output jack failure or power amplifier, speaker failure, please use headphones to insert the sound card output jack, if the left and right channels of the headphones are ringing, it is a problem with the speaker amplifier line of your key excitation or a speaker line is broken, if the headphones are also the same channel does not sound, it may be a sound card failure or jack failure.