1, mixer common fault:
1 volume fader contact is not good, when the intermittent sound.
Channel 2. Input port fault, such as the previous Vintage Budweiser mixer XLR input port easily uprooted, began to encounter this kind of trouble when I really can't believe my eyes.
3. Control system disorder, at one time by using a Shengyi 16 channel mixer and Taiwan. The results showed that total output no signal out, later changed to marshalling output, marshalling and no output signal, and I in a 10 way fader, go out is indeed the voice of the 11 channel. Then I passed the AUX output signal, and so on, and finally the mixer was completely on strike. This is not show ice, I simply put the CD signal directly to the amplifier's music. Such a mixer such as the failure of so many years, I also encountered the first time, have not heard before. In short, the fault of the mixer is input, output, control, power supply, etc., generally due to the aging of the equipment caused by.
2, equalizer common fault:
1 equalizer push pull bond contact failure, this is the most common, mainly due to aging equipment and bad environment.
2. Equalizer internal circuit fault, I have seen a number of equalizer only a signal output, and later found the circuit is broken and such an equalizer not in a few, I met several times.
3, pressure limiter, electronic frequency divider, professional, professional feedback delay and other common faults:
These devices in addition to the serious aging equipment, generally do not have big problems, most also is adjusting knob and a panel signal socket have little problem.
4, digital effect of common malfunction:
1 noise problem, digital filter in the processing of audio signal itself has a certain number of digital noise, if coupled with the signal line is not good, serious when the noise will be like rain.
2. Digital effects is the core component of the digital processing chip, failure occurs when the digital chip, I met a YAMAHA500 effects, can boot but unable to work, inside the program didn't fully used to adjust, and such a complex digital chip had no way to repair.
5, power amplifier and sound common fault:
1 the most common fault of the power amplifier is bad capacitor or power amplifier tube, which has the problem we use, but most of the equipment itself is not stable.
2 once again I have found that some of the power amplifier will occur a channel without sound of the fault, the problem is still inside the circuit.
. as for the other fault and what an amp volume potentiometer contact is not good, left and right channel imbalance, protection function is too frequent, after working panel conversion switch contact is not good and signal receptacle and so on, in short, power amplifier is a a kind of electrical appliances now sound system is prone to failure.
4. The speaker part of fault is the most common is, of course, horn, can be said to a sound system is most likely to occur in fault is burn out the speaker, this is of course a man-made factors, but the majority or the speaker itself quality problems.
Another common fault of the 5 speakers is the terminal of the terminal, the contact is bad, especially the frequent flow of the speakers easy to occur this fault. The above equipment failure general audio division is no way to repair the, I said in the previous article, the sound engineer to do "professional" if what broke the power amplifier and speaker bad those maintenance engineer, we sound division of the scope of work is to sound system match, the various tone is good.