Maintenance method of common speaker faults 1: When there is noise in the speaker, the source of the noise should be determined first.
First, test whether the speakers of the tape recorder or radio are noisy. If there is noise, it's the speaker itself. You can replace or repair the speakers. The problems of the speaker itself mainly lie in the following aspects: the paper basin of the speaker is broken, the joint of the speaker is cracked, the back plate of the speaker is loose, the frame of the speaker basin is not firmly fixed, and the screen of the speaker is too loose.
Second, replace the sound card with a slot and try to stay away from other cards, such as graphics card, modem card and network card. , especially the graphics card, has the strongest interference and may interfere with any card including the sound card.
Third, unplug the audio cable on the sound card for testing. If there is no noise, it means that the noise is caused by the audio line. You can replace the audio cable or sound card.
Two: When the speakers are silent or only one speaker is silent, first check whether the power supply and the connecting cable are connected properly. Sometimes too much dust often leads to poor contact.
If you are not sure whether it is a sound card, you can change the sound source (such as connecting a walkman) to determine whether it is the speaker itself. When it is determined that the problem is the speaker itself, check whether the speaker voice coil is burnt out, whether the lead of the speaker voice coil is open, whether the feeder is open, and whether the connection with the amplifier is correct. When you hear that the sound emitted by the speaker is empty and the sound field is scattered, you should pay attention to whether the left and right channels of the speaker are connected backwards, and consider transposing the two sets of audio lines. If the sound of the speaker is low, it is important to check whether the quality of the speaker is inferior and whether the phase of the bass speaker is reversed.
Three: When the speaker has obvious distortion, you can check whether the adjustment degree of bass and 3D is too large.
Four: In addition, the speaker's voice coil is skewed, the speaker's magnetic core is offset or there are sundries in the magnetic gap, the speaker cone is deformed, and the power feed of the power amplifier is too large, which will also cause distortion.
Computer Common Faults Maintenance Sound Card Speaker Problems Sound cards and speakers are the most important multimedia accessories on the computer. With the extensive integration of sound cards on the motherboard, the use of independent sound cards is less and less, and its software and hardware installation is relatively simple, and related failures are also reduced. As an independent peripheral with low technical content, the failure rate of the speaker is not high.
First, the sound card installation and hardware failure
At present, independent sound cards basically adopt PCI interface. When installing, just find an idle PCI slot, insert it smoothly, and fix the baffle. After installation, it is best to enter the BIOS settings of the motherboard or adjust the relevant jumpers on the motherboard, and turn off the integrated sound card of the motherboard, otherwise it may not work normally. Of course, a computer can have two or more sound cards. We only need to pay attention to the fact that I/O, IRQ and other resources do not conflict, and at the same time set one of them as the preferred main sound card in Multimedia → Sound Effect → Play.
A common problem in sound card installation is that the audio cable between CDROM and sound card is not connected well, which will lead to the failure of CD music disc to play normally. There are several kinds of such audio lines, three lines and four lines; One is big and the other is small, or both are big, and so on. And it is also related to line order. Some need one-to-one correspondence, and some need to cross. Different sound cards and CDROM have different requirements. If there is any disagreement, the CD will be played silently or only in mono. If this failure occurs, please try several different wires.
Hardware failure of sound card itself is not common, but the materials and workmanship of different sound cards are still very different. Poor quality sound cards are often prone to failure at nonstandard external frequencies. If the PCI bus frequency exceeds the standard 33 MHz due to overclocking and other reasons, the sound card may not work normally or even be detected. In this case, please try to keep the PCI bus frequency at 33 MHz.
Second, the sound card driver installation failure
Similar to other boards, drivers need to be installed after the sound card is installed on the hardware. Generally speaking, Windows can automatically identify most sound cards and install drivers.
If there is no sound after the sound card is started, it needs to be configured manually. First, enter the control panel of my computer, open the device management in the system, and delete all drivers related to the sound card in the "sound, video and game controller" item. Then use the "Add New Hardware" function to install the sound card and its drivers. Restart after installation to see if the sound card can work normally. If you still can't make sound at this time, re-enter the system, select the sound card driver from the sound, video and game controllers, and check what basic settings the driver is based on in performance. If more than one setting is listed, try the other basic settings one by one and choose the correct setting. However, it is not always possible to successfully install the sound card driver. Driver installation failure is a phenomenon that beginners often encounter when installing sound cards. Most of the possible reasons are caused by system resource conflicts. PCI sound cards generally occupy interrupt 5, and if other non-PnP devices such as internal cats also occupy interrupt 5, an exception will occur. You need to enter Device Manager to manually reassign a free IRQ for the sound card. In addition, the actual I/O address of the sound card does not match the system allocation, which will also cause the problem that the driver cannot be installed. You can also manually assign an I/O address that matches the actual sound card.
Third, the sound card noise processing
There are two kinds of noise sources of sound cards. One is all kinds of high-frequency interference signals from the inside of the chassis, which are often transmitted to the sound card through audio cable coupling, making the sound box make noise; One is directly transmitted from the optical drive or power supply to the sound card through the audio cable. Please check whether the grounding wire of the audio cable (generally there are two audio signal wires and two grounding wires) is in good contact and whether the shielding layer outside the audio cable is in good grounding. If your audio cable is not shielded, you can replace it with a shielded audio cable.
At present, the AC'97 sound card integrated by most motherboards should be regarded as a kind of "semi-soft sound card". That is, the motherboard only contains a small part of the encoding and decoding functions, and most of the decoding work is done by CPU. Therefore, when the CPU task is too heavy or the system resources are reduced, the sound card will not work normally, such as noise, short-term stop working and so on. You can try unplugging the audio cable of the CD-ROM drive or turning off the DMA of the hard disk to see if it can reduce the noise.
In addition, there is the so-called "sound explosion phenomenon of PCI sound card", which is mainly caused by the competition between sound card and hard disk for limited PCI bus bandwidth. The processing method is hard disk
Turn off UDMA or switch to another sound card. The noise of the sound card may also be related to imperfect drivers or applications. Finally, it should be noted that when connecting active speakers, you should use the "LINE OUT" interface on the sound card instead of the "SPEAKR" interface to obtain better sound quality.
Four, the sound card software and hardware compatibility problems
Sound card is an accessory with a long history, so there are many problems of software and hardware compatibility. For example, Windows XP cannot recognize some older sound cards. In this case, you can try to install a sound card under Windows 98, and then upgrade and install Windows XP on the basis of Windows 98.
Friends who occasionally like to play classic games under DOS may encounter the problem that PCI sound card can't sound normally under DOS. This is because the original IRQ and DMA interrupts under DOS are not compatible, which leads to the PCI sound card can not support the program designed according to the sound blaster standard. Therefore, sound card manufacturers put forward SB-Link solution. The PCI sound card can be connected to the motherboard through SB-Link (audio cable), and the DMA and IRQ signals of ISA bus can be transmitted from the motherboard to the PCI sound card, so that the game in DOS real mode can be played normally. In this case, just connect two connectors with special cables and install sound card drivers under DOS.
Everyone else is in the early stage! The sound card is not compatible with Coppermine CPU and VIA chipset motherboard. If the DMA mode of the hard disk is turned on, the system will operate illegally, crash or even crash. The compatibility problem of a famous S90 sound card in the past is also very prominent. When it is stored with some AGP graphics cards, some compatibility problems often occur, which will affect the stability of the system. During installation, be careful not to install the S90 sound card in the first PCI slot.
Five, the motherboard integrated sound card frequently asked questions
1996, five PC manufacturers led by Intel formulated the audio codec' 97, or AC'97 for short, which means the audio standard of "audio multimedia digital signal encoder/decoder". The core of AC'97 specification is to put forward the technology of "bus-independent sound output", which improves the traditional sound source processing method, thus making the all-digital sound source technology develop. Now most motherboards are integrated with AC'97 sound card.
The AC'97 sound card is very simple to use, and there is no problem of hardware installation. Just install the driver that comes with the motherboard CD. However, there are some problems with the motherboard integrated sound card, such as paying attention to installing the motherboard patch before installing the sound card driver, otherwise there may be abnormal problems such as speeding up the speech. In addition, pay special attention, don't forget to install the soft wave table program of AC'97 sound card, otherwise MIDI music will not play normally.
From the working principle, the AC'97 sound card integrated with the motherboard is a kind of "soft sound card". Therefore, when the CPU task is too heavy or the system resources are reduced, the sound card may not work normally, for example, playing MP3 music is not smooth and the volume is low. When collecting audio and video, if you use AC'97 sound card, it may lead to abnormal collection.
In addition, after installing AMR modem, the AC'97 sound card may not sound when surfing the Internet. This is because the crystal oscillator on some AMR modems collides with the built-in crystal oscillator of the audio in the motherboard AC'97, resulting in the silence of the AC'97 sound card. The solution is to change AMR cat to "slave mode" or use an additional PCI sound card.
Six, the speaker common fault handling
The speaker is an independent peripheral with a relatively simple structure and a low probability of failure. Generally speaking, hardware problems are improper wiring and electrical failure of internal components. However, some "failures" are related to installation and software settings.
Now multi-channel sound cards with more than four channels have become the mainstream of the market. The placement of multi-channel speakers has a great influence on sound quality. For example, the common 4. 1 speaker, the center channel should be basically parallel to the first two channels, and the low speaker should be placed in front to achieve the best effect. Other friends use 4. 1 sound card and speakers, and only two speakers have sound when listening to CD. This is mainly a setting problem. There should be an option in the setup program of the 4-channel sound card to choose whether to copy the signals of the first pair of speakers to the second pair of speakers, so that when playing a CD or MP3 sound source that does not support 4 channels, all 4 speakers can sound. However, when playing a game that supports 4 channels, please turn off this option, otherwise the sound of the front and rear speakers will be the same, and the 3D positioning function will be lost.
Common causes and solutions of computer sound distortion Some netizens have encountered the fault of computer sound distortion. The author analyzes the common causes of computer sound distortion and attaches the corresponding solutions. I hope the following can help you:
1. Check whether the latest sound card driver is installed.
2. There may be a problem with the quality of the speaker. Low-quality speakers are usually more prone to bass distortion than high-quality speakers. If the quality of the speaker is low, the playback effect can only be improved through hardware upgrade.
3. The sound distortion may be due to the excessive volume sent to the speaker, which is beyond the processing range of the speaker. At this time, we should try to reduce the volume sent to the speaker.
4. There may be hardware device conflicts on the computer. Check whether the device is included in the Device Manager tab and there are no conflicts.
(1) Click Start, point to Settings, click Control Panel, and then double-click System.
(2) On the Device Manager tab, check whether the device appears and there is no yellow circle with exclamation mark next to it. If a yellow circle with an exclamation mark appears next to the device, it means that the device may use the same settings as other devices in the computer.
If you find a yellow circle with an exclamation point: double-click the device, and then click the resources tab. Look for resource conflicts in the list of conflicting devices. If there is a resource conflict, reconfigure the device to use different resources to eliminate the conflict. Please refer to the equipment documentation or contact the manufacturer for specific operation information.
5. Check whether the setting of "Use Single Mode DMA" is correct. Check whether the "Use Single Mode DMA" setting is on:
(1) Click Start, point to Settings, click Control Panel, and then double-click System.
(2) On the device manager tab, double-click the sound, video and game controller, and then double-click the sound card. If you don't know the sound card name, please consult the sound card documentation.
(3) Click Properties, and then click the Settings tab.
(4) Click Advanced Settings, and then click to select the Use Single Mode DMA check box. If the Advanced Settings button does not appear on the Settings tab, the sound card does not support this feature.
5. Click OK continuously to return to the control panel, and then close the control panel.
6. Some old sound cards use soundman Manager with sound cancellation function:
Click Start-Run-Enter soundman, and a spider-like thing will appear in the lower right corner of the screen. After clicking Open, there will be a "voice cancellation" on it, and then there will be a sound effect, and the sound effect will be set to none. Click "Equalizer" and "Return to Zero" to confirm. This is basically enough. For new sound cards, such as RealtekHD Audio Manager, pay attention to whether the "environment" setting is normal, and it is best to set it to "None".
What is the reason for the sound of computer speakers now?
The netizen consulted the author and said: Recently, there was a sudden noise in his computer speaker, that is, the sound of current, and there was no music. The louder the volume, the louder the noise. It used to be fine, but suddenly something happened. Is the speaker broken? What if there is current sound in the speaker?
There are many situations that will cause the noise of the speaker, such as the speaker is disturbed, the interface or connecting wire is not in good contact, and the quality of the speaker itself is not good.
Generally speaking, speakers are mostly active speakers, and there must be a power amplifier inside, so noise is inevitable. The noise of active speakers can be roughly divided into electromagnetic interference, mechanical noise and thermal noise according to their sources.
Speaker problems can cause:
I. Electromagnetic interference
Electromagnetic interference can be divided into power transformer interference and stray electromagnetic interference.
1, power transformer interference
Due to the magnetic leakage of multimedia speaker power supply, it is very obvious to add a shielding cover to the transformer when conditions permit, which can block the magnetic leakage to the greatest extent. The shield can only be made of iron-based materials. Try to choose products with big brands and solid materials. In addition, using an external transformer is also a good solution.
2. Stray electromagnetic interference
More commonly, speaker wires, frequency dividers, wireless devices or computer hosts will all become interference sources. The main speaker should be as far away from the computer host as possible to reduce the surrounding wireless devices.
Second, the mechanical noise
Mechanical noise is unique to active speakers. In the working process of power transformer, the vibration of iron core caused by alternating magnetic field will produce mechanical noise, which is very similar to the hum of fluorescent lamp ballast. Choosing good quality products is still the best way to prevent this noise. In addition, we can install a rubber damping layer between the transformer and the fixed plate.
Third, thermal noise.
When the potentiometer is used for a long time, the metal brush and the diaphragm will be in poor contact due to dust accumulation and wear, and noise will be generated when rotating. If the screws of the speaker are not tightened, the inverter tube is not handled properly, and mechanical noise will also be generated when playing large dynamic music.
This thermal noise can be dealt with by replacing low-noise components or reducing the workload of components. In addition, lowering the working temperature is also one of the effective methods.
In addition, some computer speakers, when the volume is too large, will also appear noise. This situation is because the output power of the power amplifier may be relatively small, which can't avoid the large dynamic peak signal at the moment of music, or because there are many situations that will cause the noise of the speaker, such as the speaker being disturbed, the interface or connecting cable being in poor contact, and the quality of the speaker itself is poor.
Other problems lead to:
1, incorrect card insertion.
The sound card is not closely separated from the expansion slot of the motherboard. Visually, the "golden finger" on the sound card is misaligned with the reed of the expansion slot. This phenomenon exists in both ISA card and PCI card, which is a common problem. We can solve this problem by inserting the sound card correctly.
2. The input end of the active speaker is connected to the speaker output end of the sound card.
The active speaker should be connected to the Line-Out end of the sound card, and its output signal is not amplified on the sound card, so the noise is much less. Some sound cards only need one output. Whether it is Line-Out or Speaker depends on the jumper on the card. The acquiescence mode is often Speaker, so you have to unplug the sound card and adjust the jumper when necessary.
3, sound card driver problems
You can use the driver that comes with the system, or there is something wrong with the driver. If so, you can change the sound card driver.
What are passive speakers and active speakers? How to turn passive speakers into active speakers?
Active speakers are also called "active speakers". Usually refers to speakers with power amplifiers, such as multimedia computer speakers, active ultra-low speakers, and some new home theater active speakers. Because of the built-in power amplifier circuit, users do not have to consider the matching problem with the power amplifier, and it is also convenient to drive directly with low-level audio signals.
In addition, some professional recording and monitoring speakers with built-in power amplifier circuits and electronic frequency divider speakers with built-in electronic frequency divider circuits and amplifiers can also be classified as active speakers.
Passive speakers are also called "passive speakers". Passive speakers are ordinary speakers we usually use, and there is no power amplifier circuit inside. Although passive speakers do not have amplifiers, they usually have frequency division networks and impedance compensation circuits.
Active speakers are usually marked with the output power, input impedance and input signal level of the built-in amplifier. The active ultra-low speaker also marks the frequency characteristics of the input signal (such as full-band signal or low-frequency signal), low-pass filter characteristics and other parameters. Passive speakers are generally marked with parameters such as impedance, power and frequency range.
The difference between the two is that:
Active speakers need an external power supply, so they can provide high power. Passive speakers are not needed, so the volume is low. For example, headphones are passive speakers.
You might as well buy a new active speaker instead of a passive speaker, or if you really need to buy an amplifier yourself, just connect the speaker. The earphone hole is mainly your speaker design, and it is not necessarily related to the sound source!
Active speaker means that there is a set of circuits inside the speaker, which has the function of power amplifier. For example, N. 1 speakers for computers are mostly active speakers. In other words, they can be used directly by connecting them to the sound card of the computer without special power amplifier. The disadvantage is, of course, that the circuit inside may cause some vibration and electromagnetic interference. ...
A passive speaker can be regarded as a "wooden box with speakers". The advantage is that the sound can reach the best state and will not be disturbed. Because VCD, DVD and computer sound card have no power amplifier, they only output audio analog signals. Need to connect a special amplifier (power amplifier).
Can an active speaker become a passive speaker?
Cut off the connector directly and connect it with the 3.5 plug of the earphone. Pay attention to the 3.5 plug of the earphone, which is easier to connect. If it is obvious that the cables of the small speakers are two strands, combine the two speakers with white wires. If it is shielded, the shielded wires of the connected speakers are combined together, so it becomes three wires. Earphone 3.5 plug out the line should be three colors, namely gold, green and red. Just a reminder, it will be quiet to connect directly to the computer.