Xiaomi Redmi 5, released a few years ago, is still popular due to its reliability, but over time owners face a deterioration in the sound quality. If you are no longer heard during a conversation or the music sounds quiet and wheezing, urgently need to diagnose the audio system of the device.
In this article, we will take a look at all the available ways to test the audio module, from built-in system tests to the use of specialized equipment. You will learn how to use hidden codes to run deep diagnostics and what signs indicate that Redmi 5 needs repair. Proper diagnosis will help save time and money, avoiding unnecessary actions.
Before you bring your smartphone to the service, you should eliminate software errors that often occur after updating the system or installing low-quality applications. Sound diagnostics in Xiaomi has its nuances, and understanding these processes will allow you to identify the malfunction yourself. We will consider both software methods and visual inspection, which can provide key information about the state of the device.
Using an engineering menu to check the sound
The most reliable and quick way to test the performance of all audio outputs on Xiaomi Redmi 5 is using the built-in CIT engineering menu. This tool is designed for service engineers, but is available to each user and allows you to independently test each speaker without extraneous system noise. To enter the test mode, you need to open a standard “bell ringer” and dial the combination # # # #6484##, after which the engineering test menu will open.
You'll find a sound item on the list that opens, usually called a "Receiver" or a "Speaker" or a "main speaker," and you'll click on the item to run an automatic test, during which the device will play back the sound or the melody, and your job is to listen carefully to whether there's any distortion, cracking, or no sound, which will indicate a malfunction. The engineering menu also allows you to check the microphone, which is often associated with hearing aid problems.
If you hear a clear sound in the test, but it's not in regular applications (YouTube, calls), then the problem is the software or settings of a particular application. However, if the test shows silence or strong wheezing even at maximum volume, this is a sure sign of hardware failure, in which case software resets will not help, and you will need to intervene in the hardware.
⚠️ Note: Do not click Fail or Pass on the engineering menu without a real test, as this can distort the status statistics of the device in the system logs.
What if the code doesn't work?
Software tests through applications and online services
When access to the engineering menu is limited for some reason or you want to double-check the results with third-party tools, specialized applications from Google Play come to the rescue. For Redmi 5, utilities like “Phone Doctor Plus” or “Test Your Android” are great, which conduct a comprehensive check of all smartphone systems, including a multimedia speaker. These programs reproduce a set of test sounds of different frequencies, which helps to identify the resonant frequencies at which the speaker begins to wheze.
You can also use online services that generate a certain frequency and amplitude in your browser, and by running this test, you can see at what frequencies (low, medium or high) Xiaomi speakers lose efficiency, which is especially useful for diagnosing “sunned” speakers that seem to work but lose volume and saturation of sound.
It's important to completely disable all sound effects in system settings, such as Dolby Audio or equalizer, in software tests to get a "clean" signal. Artificial enhancements can mask real hardware problems, creating the illusion of normal operation. Only by turning off the software processing can you hear the true state of the speaker membrane.
- 🔊 Download a proven audio diagnostics app, such as Speaker Test or Sound Test.
- 🔇 Turn off all third-party equalizers and surround sound effects in settings MIUI.
- 📈 Do the test in a quiet room to hear even quiet extraneous noises and crackles.
- 🎵 Use test tracks with a wide frequency range to check for low and high frequencies.
Visual examination and physical diagnosis
Before moving on to the Xiaomi Redmi 5 disassembly, a thorough external inspection is needed, as many sound problems are caused by banal pollution.The main speaker grid located in the lower end and the auditory speaker near the screen are often clogged with dust, pocket pile and skin fat. This creates a physical barrier to the sound wave, making the sound deaf and quiet, which users often mistaken for a breakage.
Use a soft toothbrush or dry brush to clean the mesh, while gently passing through the mesh holes. It is strongly recommended not to use sharp objects such as needles or pins, as they can easily damage the speaker membrane itself or push the dirt even deeper. If the sound is not restored after a good cleaning, you may need a deeper diagnosis with the disassembly of the case.
With the skills and tools, you can carefully remove the back cover (preheat it with a hair dryer because it is held on glue) and examine the plume of the speaker. Often the problem lies in oxidized contact or departed connector on the motherboard. Visual diagnostics allows you to immediately see traces of moisture or mechanical damage that may have occurred after a fall.
💡
Use isopropyl alcohol and a toothbrush to clean the speaker's mesh carefully.The alcohol evaporates quickly and does not damage electronics, unlike water or aggressive solvents.
Analysis of typical malfunctions of Redmi 5
The Redmi 5, like any electronic device, has its own characteristic sound-related illnesses. One of the most common problems is the drift of the main speaker plume due to constant vibrations or impacts when falling, in which case the sound may disappear completely or only appear when the smartphone is in a certain position in the hands, when contact is temporarily restored.
Another common problem is wheezing at maximum volume, which eventually turns into complete inoperability, which indicates that the diffuser speaker is broken or deformed, and the coil may have burned, and the possibility of contact oxidation due to moisture even if the phone did not fall into the water directly - high humidity or condensate can do its job.
Below is a table that will help you classify symptoms and guess the cause of the malfunction before you start an active repair, which will allow you to better understand the situation and more accurately explain the problem to the master in the service center.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Sound is quiet, deaf | Grid pollution, software restriction | Brushing, checking settings |
| Strong crackling, wheezing | Membrane damage, coil break | Replacement of the speaker |
| The sound disappears periodically. | Draining, contact oxidation | Reconnecting the plume, cleaning contacts |
| Total lack of sound | Burned speaker, malfunction of audio codec | Module replacement, fee repair |
💡
Periodic loss of sound most often indicates poor contact of the plume, rather than the death of the speaker, which makes repairs easier and cheaper.
Cleaning and maintenance of the audio system
If the diagnostics showed that the Xiaomi Redmi 5 speaker is technically sound, but the sound remains unsatisfactory, it may be time for a deep cleaning.Dust accumulated inside the case can settle on the membrane, weighting it and reducing the quality of bass playback.Gently blowing compressed air (an optics cleaner can be a great improvement.
When cleaning, it is important not to overdo the air pressure to avoid damaging the internal design of the speaker. The jet should be directed at an angle, blowing dirt outwards, rather than pushing it deeper into the case. Regular maintenance, carried out every six months, will help to extend the life of the audio system of your smartphone and maintain the sound quality at a high level.
It's also worth checking if the speaker's openings are sealed with a protective film or cover. Some tight cases can block the output of sound, especially if they are not matched to the model or have offset cutouts. Make sure that nothing prevents the sound wave from freely leaving the device housing.
- 🌬️ Use a spray of compressed air to blow out speaker grids.
- 🧹 Carefully remove visible dust with a soft dry brush before purging.
- 📱 Remove the protective case during testing to rule out its effect.
- 🚫 Do not use a vacuum cleaner, as static electricity can damage electronics.
When a dynamic replacement is needed
If all the software methods and cleaning failed, and the tests in the engineering menu confirm no sound or severe distortion, there is only a replacement. For Redmi 5, this is a standard procedure that takes an experienced craftsman about 30-40 minutes. Self-replacement is possible, but requires thin tools, suction cups to remove the lid and accuracy.
When buying a new speaker, pay attention to its marking and dimensions, as even a slight difference in the height of the module can lead to the rear cover not closing or will press on the membrane. Original components provide better sound quality, but quality analogues can also be a good solution for a budget model.
Once you have installed the new module, be sure to retest the engineering menu to ensure that the landing is tight and there are no extraneous sounds. If the problem remains after the replacement, it may be a malfunction in the audio codec on the motherboard, which requires more complex soldering and diagnostics at the component level.
⚠️ Note: When disassembling yourself, remember that the speaker plume in Redmi 5 is very thin and easily breaks when handled carelessly.