Why does the radio in the car not turn on (work) even though it has power?

Car radio malfunction

Malfunction of the car radio, which has recently been almost the leader in the list of the most common problems, is associated with interruptions or lack of playback when the car radio reads various discs. Malfunctions of car radios of this nature are explained, first of all, by defects in the CD mechanism itself, inside of which plastic or metal elements are placed.

Why doesn't the car radio read the flash drive?

The radio in the car doesn't work

Every modern car is equipped with a radio receiver. It is difficult to imagine a driver who can do without this industrial achievement. Sometimes a car radio upsets us by poorly receiving the signal and completely stopping making any sounds. How to deal with such a problem?

As soon as you notice that the radio in your car has become worse at receiving a signal or periodically stops working, the cause of the malfunction does not necessarily lie in the vehicle itself. Sometimes the problem lies in the radio antenna mounted on the car body. Serious interference to radio signals is caused by high-rise buildings, mobile operator towers, solar flares and other objects emitting electromagnetic fields.

Test the antenna

Most often, the radio in the car does not work precisely because of a malfunction of the external antenna. The external metal radio antenna installed on the vehicle body is most susceptible to mechanical damage. When it hits objects along the way, it begins to receive signals poorly or stops doing so altogether. Often the element is damaged during the cleaning of the body from contaminants at a car wash. Sometimes car washers move the antenna before starting treatment, and then forget to return it to its original position. During the cold season, the performance of the mechanism may be affected by ice formed on its surface.

While parking, a bird may try to land on the antenna, which will also damage the element. Any subtle deformations that we do not attach importance to can lead to a deterioration in the quality of radio signal reception. First of all, inspect the structure and extend the antenna completely if it was folded. Free it from snow and ice - the main sources of interference.

If the problem occurs in winter, do not try to pull out the antenna with a handy tool. Inexperienced drivers often use pliers for these purposes, which leads to damage to the antenna housing and the entire electromechanical mechanism for its extension.

Evaluate the reliability of your antenna connections

The signal may disappear when the car receiver is poorly connected to the connector of the antenna itself. An unstable connection between the antenna cable and the radio leads to an immediate drop in the quality of the radio signal. Instead of music and programs, you will hear only interference or silence on the radio.

During the operation of a car, its body is subject to numerous vibrations. They provoke loosening of wire connections. Moisture entering the contacts provokes the development of corrosion processes. These phenomena are also typical for the connectors that connect the antenna and the radio. The driver loses the ability to configure the equipment for high-quality signal reception.

To conduct a visual inspection of the cable connecting the radio and antenna, it is necessary to dismantle the radio installation or push it forward from the instrument console. You need to focus your attention on the rear of the tuner, which is the most vulnerable part.

If a visual inspection does not help to identify the cause of the malfunction, do not rush to put the radio in its original place. The connector or cable may receive damage hidden from the human eye. Turn on the radio and try moving the antenna cable that goes to the radio. If the connection is tight and reliable, this will not give any result. If such manipulations help to find the position of the cable at which the radio starts working, then it is necessary to replace the connection connector and the antenna cable itself.

Replace the radio antenna

Traces of rust, tears and dents on the radio antenna indicate the need to replace the element. Only this will help restore high quality signal reception. Often, rust affects not only the mast, but also the antenna connectors where the cable connecting to the radio tuner is connected.

In modern cars, new types of radio antennas are installed. They are made in the form of a mesh sticker, installed on the windshield or rear window of a car. Flat elements are aesthetically more attractive compared to their predecessors. They are located inside the car interior, so the possibility of mechanical damage to the mechanism is minimized.

The main problem with flat antennas is the low quality of signal reception. This is especially true when located in large cities and hilly areas. Damage to the mechanism creates the need to replace it with a new one.

Use radio signal boosters

Sometimes you can restore normal radio signal reception by installing an amplifier. This becomes irrelevant if the mechanism breaks down, is excessively worn, and contacts are deformed. Amplifiers help solve the problem only in situations where the equipment is working properly.

Check the radio

If the previous manipulations did not help resolve the problem, then there is a high probability of a breakdown in the radio itself.

Source: https://avtolife.net/ne-rabotaet-radio-v-mashine/

Turns off during operation

It happens that the radio turns off during operation. This problem can be caused by a poor or unreliable connection in the power circuit, which occasionally becomes loose when driving fast on rough roads, resulting in an unexpected shutdown. To fix the problem, you need to connect the power cables of the car radio more securely. Connecting the negative wire of the car radio to the car body is carried out as follows:

1. Find the stud closest to the radio
2. Clean it from dirt and paint.
3. Take a piece of wire with a terminal that has a hole of a suitable diameter.
4. Connect one end to the negative terminal of the radio
5. Place the terminal onto the stud and screw it securely.

Unreliable mounting of the car radio on the dashboard also leads to malfunctions, including shutdown. Another reason for sudden shutdown is the protective timer built into the radio. It is used to avoid draining the car's battery if the device is accidentally left on without pressing any buttons for a specified period of time. To deal with this problem, you just need to turn on the radio again.

Car radio malfunction: looking for reasons

Car radio malfunction

Malfunction of the car radio, which has recently been almost the leader in the list of the most common problems, is associated with interruptions or lack of playback when the car radio reads various discs. Malfunctions of car radios of this nature are explained, first of all, by defects in the CD mechanism itself, inside of which plastic or metal elements are placed.

Why doesn't the car radio read the flash drive?

Causes

So:

• Both plastic and metal tend to “get tired”. Thus, all mechanical parts made of these materials are sooner or later subject to wear.

Car radio defects

• Another reason for car radio failure is dirt. Over time, dust and dirt accumulate between the parts due to the operation of the car radio in extremely harsh conditions. In this case, failure of the optical part or various mechanical parts becomes common.

Note. The first symptom that contamination is observed is the disks freezing or problems with their playback.

• Another common cause is mechanical failure, related in one way or another to the power circuit. Incorrect connection of the car radio or sudden surges in voltage in the on-board network are the root cause of such breakdowns.

Note. A symptom that a mechanical breakdown is possible is considered to be the absence of “start-up” of the car radio or the absence of display backlighting and sound.

Car radio fault codes

In some cases, it may be enough to simply completely disassemble the CD drive, then carefully clean the laser reading lens itself. The car radio then starts working as if nothing had happened. This ease of repair of car radios can be explained by the fact that during operation, dust settles on the lens, which ultimately affects focusing.

Note. In addition, it is recommended to first check components such as a fuse or protective diode. You cannot ignore the printed circuit board, as well as tracks that may burn out. Don’t forget about the microcircuits that will need to be checked for chips and cracks.

In simple words about repairing TVs and home appliances with your own hands

Hello, friends!

This article is devoted to car radios, or more precisely, to the diagnosis of typical malfunctions of these devices.

The car radio is subject to constant vibrations while the car is moving, which only contributes to its rapid failure.

Typical car radio malfunctions include:

The car radio does not turn on at all. The reason for this may be lack of power. You can check the power yourself or by contacting a service center with an auto electrician. If the reason does not lie in the diet and everything is fine with it, it is necessary to carry out a diagnosis.

Lack or loss of control panel backlight. Reason: This malfunction may indicate that the light sources (LEDs or bulbs) or the power circuit of the control panel are not in order.

The car radio does not read at all (NO DISK or ERROR appears) or reads CDs or DVDs poorly. The cause of this malfunction may lie in the laser head, the motor that rotates the disk, or the main control board.

When the car shakes while driving (on a dirt road, for example), disk reading gets lost. Reason: this defect may be associated with a breakdown of the shock absorbers of the radio or laser head. The malfunction can be eliminated by carrying out repairs in a workshop.

The car radio is working properly, but there is no sound on one or all channels. It is necessary to check the performance of the speakers in a hospital service center. If everything is in order with the speaker, then the malfunction may be associated with a failure of the power circuits or the pre-amplifier of the car radio, as well as its output stage.

The message “Please code” appears. This means that the problem lies in the settings reset. To eliminate this, you need to enter the code for the head unit. Contact the service center.

CD/DVD car radios do not load or unload the disc. The cause of the breakdown may lie in the disk loading motor, its control, power supply, or in the pressure roller. As a result, the disc may slip and fail to grip. It's also worth checking the disc sensors.

Many car enthusiasts do not pay enough attention to cleaning the car radio dashboard from dirt and dust. Severe contamination of this device can also cause frequent and unexpected breakdowns. Dust and dirt clog the holes and outputs of the car radio, so inevitable contamination of the optics and mechanics occurs. “Symptoms” in this case will be frequent freezes, playback failures and failure to load the disk or USB flash drive. You can fix the breakdown yourself: disassemble and clean the laser reader lens.

Failures associated with the supply circuits can lead to the fact that the device will not turn on at all or there will be no functioning of any modes (no display backlight or no sound or CD mode). The absence of sound may indicate that the UMZCH has burned out. In such cases, check the protective fuse, inspect the printed circuit board, inspect the microcircuits for damage to the housing (deformation, chips or cracks). The electrolytic capacitors may be swollen or the traces may be burnt out.

If nothing is found visually, then it is better to contact a specialist, since attempts to fix the problem yourself can lead to even bigger problems.

I wish you success!

Causes of car radio not turning on

A car radio, like any other device or mechanism in a car, can fail. As practice shows, car radio repairs are usually carried out in the event of improper operation of the device or when malfunctions occur that are not related to use. In this article, we propose to familiarize yourself with the main causes and methods of eliminating audio system breakdowns.

There is no display backlight or the system does not turn on

1. Perhaps the problem is the lack of power at +5.
   If you decide to get the device out and repair it yourself, first of all you need to pay attention to diagnosing the second contact of the CN701 connector. It should have a positive voltage of 14 volts, this voltage should be transmitted to the collectors of the transistors. If there is no voltage, repairing car radios involves replacing transistors or a zener diode.
2. There is no power activation signal. Before repairing car radios, you need to check the voltage of + 4.8 volts on the fortieth pin of the IZ901 controller. You should also check for the presence of a pulse on the third contact of the controller.

Testing the multimedia system with a multimeter

The car radio turns on, but there is no sound or noise

Car radios need to be repaired independently or by a specialist if there is no sound volume or if the volume is increased and tracks are played, the sound becomes loud.

There may be several options:

1. There is no sound when starting the engine. If the sound disappears even when you increase the volume or there is no sound, this is usually due to the absence of the Stand.By signal. In this case, when the sound has disappeared and is not there, you should check the high-level pulse at +4.8 volts. We are talking about the fourth pin of the IC901 controller. If the sound disappears and there is no pulse, then car radio repair involves replacing the controller. If the sound disappears when you start the engine and increase the volume, you need to diagnose the four contacts of the power amplifiers.
2. When starting the engine the sound is loud. If the sound is loud when the volume is increased, check for voltage at the bases; the resulting parameter should not be equal to zero. It often happens that the sound becomes loud when the volume is increased due to zero voltage - if this is the case, then car radio repair will be based on replacing transistors. Also, the sound sometimes fades when the volume is increased due to the Mute button not working - there is a possibility that the problem lies with the controller. If there are problems with sound volume, you need to diagnose transistor Q802.
3. Volume problems may be caused by one or more circuits in the amplifier not working properly. If there is no sound, you need to diagnose the entire “path” from the input to the output of each circuit. Repair of radio tape recorders comes down to replacing transition capacitors or circuits.

Does not read disks, flash drive or disk is stuck

Why doesn't the radio read a flash drive or disk after starting the engine? The disk is stuck, stutters, the system does not see the flash drive?

The reasons may be the following:

1. The radio does not read the flash drive, does not see the disk, or the disk stutters or gets stuck after starting the engine. Perhaps the device simply does not understand the recording format. In this case, repair of the radio is not required, you just need to burn the disc in a different format.
2. If the system does not see the disk when the engine starts, the disk is stuck, stutters or heats up, this may be due to contamination of the optical lens. As mentioned above, problems in the operation of the buttons and the device as a whole after starting the engine can be associated precisely with dirt. In this case, the problem is solved by using a special cleaning disc. The operation of such a disk is carried out in accordance with the requirements specified in the instructions. You can clean the system yourself by blowing out the elements or cleaning it with a cotton swab.
3. Another reason may be the lack of laser current; you can get rid of such a malfunction by adjusting it.
4. Inoperability of loops and wires. It is possible that during the operation of the car, the screws inside the structure simply became loose, or it could be a leakage of resistors.

The device is heating up

If the radio gets warm and turns off randomly, there may be several reasons:

1. The system heats up and turns off as a result of poor power supply. Lack of power will lead to the radio turning off randomly, or this is due to power failures. When the radio gets warm and turns off, you need to check the power cable - perhaps it is just coming off or broken, then it will have to be replaced.
2. The device heats up due to poor ventilation and turns off when it overheats. If the system gets hot, this indicates insufficient ventilation. This malfunction is relevant for Pioneer radios and, as car owners of such systems assure, there is nothing to worry about. But if the system constantly heats up and then turns off, you need to consider additional ventilation.
3. Sometimes the device turns off due to software glitches. You can try to solve this problem by resetting the radio to factory settings.

Source: https://chevroletcars.ru/info/ne-vkljuchaetsja-magnitola-v-mashine-prichiny/

If there is no sound

Modern musical and automotive technology has one weak point. This is a UMZCH microcircuit. This is an amplifier. It often fails due to incorrect connection of the speakers.

If you decide to install the device in a car, you should connect the power last, after checking all other connections. This microcircuit also crashes if there is a power surge in the on-board network.

The power supply of this microcircuit is not stabilized by anything at all. It can fluctuate within significant limits. Some microcircuits want more voltage than the network can supply. Here you only need to replace the microcircuit or go to a service center.

Also, sometimes the radio does not play in the car due to wiring problems. In this case, you need to check the AUDIO fuse. In most radios it can be found in the mounting block. If the fuse is intact, then you need to start the car, and then use a tester to check whether voltage is supplied to it.

If there is voltage, then you need to examine the car electrical system and the correct connection.

Why the radio doesn't work

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A breakdown of the radio can be a very unpleasant moment. Of course, sometimes this issue can be resolved on your own, but it is advisable to use the services of car services, since the reasons are different, but everything looks quite standard. There can be different breakdowns of radio tape recorders.

The screen or backlight does not work, the buttons stick, does not turn on and does not respond to commands, that is, the standard radio does not work - there are always several reasons for this. Car enthusiasts often ask how they can fix a breakdown with their own hands. This article will highlight several options for fixing breakdowns.

If there is no sound

Stock radios break down no less often than branded ones. Quite often the problem is caused by wiring

The radio does not work for various reasons. Sometimes the sound just doesn't work. To fix this problem, consider one of the methods.

First you need to measure the voltage in the wires to which the speakers are connected. When we see that the voltage is present within acceptable limits, which is about 6V, it means that the microcircuit is not damaged. Having disassembled the radio, that is, by removing the bottom and top covers, we check the functionality of the amplifier. Without disconnecting the wires, we touch the capacitors, of which there should be four near the microcircuit.

If the signal does not pass through the inputs of the microcircuit, you need to measure its operating mode. The voltage on the legs will most likely be zero. Then we’ll check the stabilizers and, having found a faulty one, unsolder it. Having thus changed the microcircuit, we assemble the device.

How to fix the backlight

Often the display backlights of radio tape recorders go out. If the backlight stops working, proceed as follows:

• It is worth disassembling the front part, where you can see that the LED itself does not work, which can be replaced with a regular diode lamp on sale.
• You need to unsolder the standard backlight.
• Take two LEDs and a resistor from the new lamp.
• Sharpen so they fit into the holes.
• After turning, we insert them into place, you need to connect the diode and resistor
• We connect taking into account the correct polarity, that is, to the place where the lamp was.
• We assemble the external panel and are surprised at the result.

The backlight in this case may be even brighter than standard.

If you need to disassemble the radio

When the radio stops working, you need to remember that its specific location on the front panel does not protect it from dust and dirt from the car’s ventilation and heating systems. Due to the large amount of dust, the components begin to overheat. To eliminate this elementary possibility and repair the radio with your own hands, proceed as follows:

1. Disassemble the cover on the board side.
2. Clean the board with a brush to remove accumulated dirt and dust.
3. It is also worth checking that the soldering is in good condition or removing burnt-out elements.
4. Unscrew the bolts securing the CD deck.
5. Next, pull it out, disconnecting the cables connected to the board itself.
6. Get rid of the protective diode, that is, unsolder it.
7. Put a new one in its place, first checking it before soldering.
8. Assemble the radio and connect it with the engine not running.

No one has ruled out the possibility of a lack of power supply either; then you need to check the fuse in the installation unit.

Auto forums also often ask how to carry out DIY repairs when the buttons on the radio do not work. Why is this happening? Let's try to figure out this problem.

After disassembling the radio, double-check the buttons with a tester; usually the problem is in the power button. The buttons that don't work just need to be re-soldered.

Other breakdown features

Repair of radio tape recorders has become too in demand, as car enthusiasts are accustomed to a comfortable pastime in their cars. It is impossible to quickly determine why the equipment fails, and it is unlikely that it will be possible to repair it efficiently in a hurry.

If the radio screen does not work, then it is better, after all, to contact a specialist. But sometimes you just need to re-solder the contact so that there is a good connection between the parts.

Cigarette lighter failure

When the cigarette lighter and radio do not work, you need to understand that the cigarette lighter can only work with 12 V of incoming power. Car experts recommend not to exceed this limit, therefore, if the radio and cigarette lighter stop working, the main aspect is to check this mode. It is also advisable to connect directly from the battery. If the cigarette lighter does not work, then the fuse is most likely blown. Below you can watch a video about replacing the fuse.

In addition to this method, there is also the option of replacing the cigarette lighter socket, or rather its fuse element. You can even replace it with a self-healing insert. It reacts to overheating and turns off, and when it cools down it turns on itself.

It is impossible to consider all types of radio breakdowns in one article, but the main points that you need to pay attention to are still presented

Source: https://1avtozvuk.ru/remont/ne-rabotaet-magnitola

Understanding nutrition

So, the radio does not turn on. The first thing that could be is the fuse. Any device is always equipped with a fuse in the positive network. Often the rating of such a fuse is 10 A. It is the one that burns out first. You just need to replace it and everything will work again.

If you replace that fuse and it blows again, then things aren't that simple. You will have to use a soldering iron or take the device to a service center if you do not have basic knowledge of electronics.

So, first the “music box” needs to be disassembled. This must be done from the board side. So, you need to inspect everything carefully. Some car enthusiasts connect the device directly without a fuse. This will sooner or later lead to the radio in the car burning out.

If burnt tracks on the board are visible, they can be restored. Swollen capacitors can be replaced. And then again enjoy music in the interior of your car.

Kia Rio G4FA or still G4FC?

Hello everyone, my dear readers, there are more than 1500 of you, I am very pleased that I bring some benefit *probably*. So today we will talk about a non-standard, but quite interesting situation with a Kia Rio car with a 1.6 engine. An acquaintance of an acquaintance bought a car for restoration, as indicated above, a 2013 Kia Rio with a seized engine. Well, it seems like an everyday matter, well, I caught the wedge, we’ll fix it. We disassembled the engine, checked the condition of the crankshaft, connecting rods, pistons, block, and so on, the condition, as they say, is not standing. The diagnosis needs to be changed. He went to a good office, they twisted his knee and said the patient was more likely dead than alive. Well, what problem do you have with the crankshaft, he asked, of course there is, the master answered, and he asked the client from my car, of course from yours, I’m not a fool, the master answered. This is how this interesting story began. We ordered using the VIN number of the connecting rods and piston. And we started assembling the motor. The car was ready and running quietly and amazingly, but there was just one problem. Power. The car did not drive either from the bottom or from the top. These are the situations, of course, but then they started replacing a bunch of sensors, removing catalysts and similar actions that did not lead to any result. This Epic lasted for a year. A friend calls and says: There is an interesting case. I always like interesting cases and he tells me everything that was described above, I’m a little in a stupor, but I really want to make such a car. Upon arrival at the car, as always, I turn on the diagnostics and quickly examine the errors and parameters in real time:

Revolutions - 750 revolutions;

Short-term balancing - 1%;

Long-term balancing - 0%

Pulse to injectors - 2.3 m.s.

MAP (intake pressure sensor) - 60 Kpa

Lambda. What. I don’t understand 60Kpa. Once again I run 60Kpa again. There is a clue as to where this pressure in the intake comes from. I turn on the ignition 99Kpa, theoretically the sensor is working, and it’s already new here. I take about 3 devices and they all show the same thing. I think, well, how to measure compression, the car works smoothly. Let's go climb with the magnificent Postalovsky, I bow my head to its developers and creators. First I take an oscillogram of the crankshaft and camshaft, everything is fine.

I tighten the pressure sensor and do a sprint RX. And I start to think, why the hell is the compression ratio so low?

Okay, I’ll look at it on a working car since I save all the tests for myself. And everything is fine there. Here are two tests: on the right is a working motor, on the left is mine.

I couldn't believe my eyes. If the compression ratio is so low, what kind of compression is there? I pick up a compression meter. 6 points on all cylinders. Damn it, something like that. The car has been driven for a year with this compression, it starts up perfectly, runs smoothly, but does not drive. I catch myself thinking, maybe while I was driving, I was twisting the film, but no, adding oil, the compression did not increase. What could this mean? The parts seller says that the connecting rods and pistons are correct. The crankshaft seller says that the crank is exactly 1.6. I believe the numbers. We remove the engine and, lo and behold, the knee is not the same.

Let's summarize: The g4fa motor has a displacement of 1.4 and a short crank with a piston diameter of 73 mm and long connecting rods, and our g4fc motor of a displacement of 1.6 has a long crank with short connecting rods and a piston diameter of 73 mm. The G4FC engine belongs to the Gamma series and differs from the G4FA only in the crankshaft with an increased piston stroke from 75 mm to 85.4 mm, otherwise the engines are like two peas in a pod, still the same phase change system. Yes, I didn’t look, and I made a mistake, but remember, always check the spare parts. Have a nice day everyone and less breakdowns. Dimon Diagnost was with you until we meet again.

Spontaneous shutdown

Reading the forums showed that this is a popular problem. For example, many people turn off the radio in their car when listening to music at a volume close to maximum.

Here, car enthusiasts with experience suggest that these are problems with the connection and the battery. If the battery is not charged to 100, then you just need to connect the radio directly from the battery through the fuse. And then everything will be very good.

So, sometimes when driving on our roads the device may also turn off. These are definitely contacts. Motorists also write that the radio in the car turns off every half hour when the engine is not running. And the answer here is simple. This is not a problem, but an advantage. And this is normal operation of absolutely all devices to save battery.

This is not all that can be. However, here are the main problems that people complain about on car forums. Perhaps this article will be of help to someone and help solve problems with music.

A practical look at the general structure and functioning of a pioneer car radio

In practice, all pioneer car radios fall into the category of increased complexity from a device point of view. There are a number of factors that can cause your car radio to malfunction prematurely. In this regard, it is necessary to be able to both diagnose the malfunction and eliminate it.

No sound or strong background

If the sound disappears or noise is heard instead of the melody in all playback modes, you need to inspect the device for damage in the following order:

• at the outputs of microcircuits 6 and 20 the voltage should be 14 V, and 4 and 22 UMZCH - 5 V;
• determine the audio signal IC201 at the outputs of chips 18, 19, 30 and 31;
• if there is no signal, check it at the input of IC201, and also determine whether the signal at the output of MK 25 and 27 is suitable for the control bus;
• when the audio signal is present on the listed outputs, the IC201 chip is damaged;
• make sure that there is no voltage at output 22 of IC301, which is located on the MUTE formation circuit;
• check the connecting wires of the car radio for mechanical damage;
• Make sure that the audio signal is present on IC251 and IC201.

Sometimes the car radio may not work due to malfunctions in the AM tuner. Check out its components, including:

• URCH elements Q201 and Q202;
• LOCL signal on tuner circuit 23;
• diodes D202;
• audio band filters CF51 and CF232.

A description of the disturbance in the sound of melodies will help narrow down the search area for damage in the system:

• If the sound disappears when starting the engine or after increasing the volume of the tone, it means that the Stand-By signal is missing. Check the +4.8V pulse on pin 4 of IC901. When there is no pulse, you need to change the controller. It will also be useful to examine the strength of the power amplifier contacts.
• When the device heats up and hisses as the sound volume increases, you need to monitor the voltage in the base circuit of the output transistors. It should be different from 0. If there is no voltage, then the transistors are faulty. Noise may also appear due to malfunctions in the controller, transistor Q802, or mute button.

You can repair the sound processor by replacing the found damaged element.

Backlight repair

This method is suitable if the radio display is blinking or the backlight has stopped working altogether.

Keys for removing the radio

To solve the problem with our own hands, we will need to resort to the method described in the list below:

1. First, let's take a special tool for dismantling the radio to pull it out of the panel. You can also use knitting needles or something with similar characteristics.
2. We take out the radio and take the ammeter in our hands. We check that all wires are in good condition (the voltage on them should be about 6V). If you notice a strong voltage fluctuation on one or more wires, then we already know where the problem lies.
3. We replace the defective wire and check the operation. If nothing has changed, then we follow the list further.
4. We disassemble the front part to get to the diode that blinks. Next, we dismantle it and replace it with a new one.
5. Next we need a soldering iron. You will need it to desolder the standard backlight of the device, since the problem lies there if you have reached this stage.
6. From the new lamp we will need to get one resistor and two LEDs.
7. The next step is to grind, as we need them to fit into the required holes. After they are placed in their inputs, we insert them and connect the diode to the resistor.

Unraveling the radio
Important: make sure that you maintain the polarity to avoid malfunctions. Connect where the lamp was installed.

Now we have to put everything back together the way it was originally. At the end we connect the power and admire it.

Now you know how to repair a flashing radio that constantly distracts you from the road or listening to music. Or you just don't want the problem to go any further. I hope the article was useful to you and answered all your questions. If your JVC, Kenwood, Sony or any other radio is blinking, the detailed instructions in the article should have solved the problem.

How we tried to fix the Panasonic RX32F tape recorder

We naturally love and appreciate every client

But there are different situations...

We were contacted to repair a 1983 Panasonic RX32F tape recorder.

I arrived, but somehow the conversation didn’t go well. In general, at first glance, nothing special, but the client left and left nothing for repairs...

Anything can happen, we continue to work.

Naturally, the boss immediately saw everything and tensed everyone up, like “ What the hell is this?”

In general, everything here is OH*&^LI"

“Quickly give me all the recordings of conversations with the client and videos from surveillance cameras!”

“To have an answer by the evening and to urgently call the client back and resolve the situation!”

Customer focus and all that in general.

We started listening to recordings of conversations and watching videos from cameras.

And not everything is as simple and unambiguous as it turned out.

We sit and think now.

They weren’t too lazy and made a video for clarity.

This is what you tell me to answer and how to solve the question

, Dear colleagues?

PS

Warning, there is some foul language

Well, it so happened that until the early 90s I was with vodka. uh. a virgin.

early 90s, I serve on a huge reconnaissance ship (always proud!).

They didn’t give an apartment to a bachelor, so he lived on a ship.

Some goods began to be sold using coupons (I’m not proud). I have accumulated a bunch of alcohol tickets (not a fan).

Why should the coupons go to waste? I asked a colleague to buy vodka (six bottles), and he brought it.

I put them on the windowsill (2 large portholes, uh, windows.)

and by that time I had brought a two-cassette (cool Soviet) tape recorder from home to the ship and it was acting up. nnnnado

repair. Well, I opened the case. I look: what’s wrong.

and in the cabin (a large and comfortable cabin with a shower) an exclusive (!) group of officers begins to gather.

tape recorder: found a discarded belt (like a rubber ring) and fixed it. hands covered in grease. how to wash it off? Right.

A mug looks into the shower room.

mug: “ MEN.” HE WASHES HER HANDS. "

two more crazy faces: “KILL THE BASTARD. "

me: uh, do you want vodka? there are 5 more bottles!

PS: Lesha, health to you!

Standard path

You can create a homemade music center from an old car radio. Most of these devices have a powerful amplifier in the electrical circuit, which allows:

• Reproduce sound using suitable passive acoustics left over from an old tape recorder or player.
• Depending on the complexity of the device, play CDs, including in digital formats.
• Install a radio whose antenna can be mounted inside the speaker.

The photo shows an example of a homemade music center. In fact, this is the basis, which can then be brought to the desired level: create finishes, design the body, use computer modding tools.

Another way is to make a music center from an old player or tape recorder, using almost all the components of the donor device.

The radio can be disassembled and its electronic components can be placed inside the body of the old media center. Such work is not difficult: the design already contains an antenna and a power supply, which are often standardized and do not require modification.

You can place an old radio in place of cassette decks that are not used due to outdated storage media.

For the above options, the power source can also literally be “lying under your feet.” Worn out, unusable due to a drop in power or slight deviations in parameters, computer power supplies are an ideal option.

The comb, which attaches to the motherboard, contains pins for system startup and a low-power, fixed-voltage bus. To connect to a 220V network, the computer unit has enough four-pin connectors.

What to do

Many malfunctions due to which the sound in the car radio is lost can be eliminated independently, without resorting to the services of a service center. For example, checking and correcting the sound parameters of Pioneer radio tape recorders, as well as other brands, is carried out in accordance with the instructions for the device.

How to set up a radio

To adjust the sound, press and release the volume control. If the audio is lost on one side, you need to correctly adjust the stereo balance. To do this, press the car radio volume control until the display shows “BAL” and a number. By turning the knob, the stereo balance is set to zero, in the center. The volume of the left and right sides of the car audio system will be the same.

To configure the parameters of the Pioneer audio radio, press the “Audio” button to select the “Fad” function. After this, the “left” and “right” buttons set the balance between the left and right sides, and the “up” and “down” buttons set the balance between the front and rear channels of the car audio. You can configure the radio again by performing a factory reset. It is necessary to press and hold the “Reset” button, which is located on the front panel or under it, with a sharp object for several seconds. This procedure is carried out on a machine with the battery installed and connected.

Amplifier replacement

If the speakers are working properly, but there is no sound from the speakers, then the problem lies in the failure of the amplifier chip. In this case, you must have skills in working with a soldering iron and knowledge of radio electronics.

Since all parts inside the car radio are tightly installed, care should be taken to avoid the risk of accidental damage

First, the board is removed from the metal case and degreased on the reverse side. Then the faulty microcircuit is soldered off. After this, the seat for the new amplifier chip is prepared by thoroughly cleaning it from old solder. If necessary, the leads of the part are bent with tweezers and a ruler.

Soldering is carried out with extreme caution. Adjacent parts can be protected with foil

After installing the board in the chassis, the speakers are connected to the radio, power is supplied and operation is checked.

Stripping the loop

This procedure can be performed on radio tape recorders in which the nodes are connected to each other by cables. You need to prepare alcohol or acetone, a cotton swab and an eraser. Then the radio is disassembled and the latch securing the connecting cable is loosened. To avoid mistakes during installation, you should mark the location of the cable relative to the socket.

A careful inspection will determine the presence of dirt and damage. First, you should go over the contacts of the cable with an eraser. Then a fine cleaning is performed using a cotton swab dipped in alcohol or acetone

In both cases, care must be taken not to damage the delicate contacts. The reverse connection of the cable is carried out according to the previously made mark

If only one side of the speakers works

The cause of this problem is an incorrect connection of the speakers themselves or a violation of the stereo balance. Another reason for the lack of sound in the speakers of one side is poor contact in the car radio cable, which often occurs due to oxidation or constant shaking of the device.

Thus, you can determine why the sound on the radio does not work on your own. Making the necessary settings and troubleshooting will also not cause significant difficulties.

Other problems

Problems with reading storage media arise no less often than difficulties with turning on. You can eliminate them yourself.

No sound or noise

This problem can be caused by several reasons, the most common of which are:

• No signal. In this case, the sound disappears or loses volume. Checking the high-level pulse supplied by the fourth pin of IC901 helps solve the problem. If there is no signal, the controller must be replaced. If the sound disappears when you start the engine and adjust the volume, you need to inspect the amplifier contacts.
• No voltage at the base. In this case, the sound fades or disappears completely when you try to increase the volume. This problem is determined by checking the bases with a voltmeter. If the tested parameter is zero, the transistors must be replaced.
• The Mute button is broken. The change in sound quality in this case is due to a controller malfunction. If you have problems with volume control, you need to check transistor Q802.
• Amplifier chips burn out. If there is no sound, you need to inspect all the cables connecting this module to the tape recorder. Repair involves replacing capacitors and microcircuits.

Does not read the disk, flash drive or the disk is stuck

When using the car radio, the following problems with reading information may occur:

• Inability to recognize the disc. Occurs when the laser head is damaged due to vehicle shaking. Replacing this part helps solve the problem.
• Inability to read flash drive. First of all, you need to check whether there is a light indication on the drive. If it is present, the connector is working. After this, check whether the type of flash drive matches the parameters of the radio. Older audio devices may not read large storage devices. Problems also arise when the software is damaged. They can be solved by flashing the radio.
• Disc jam. Associated with a breakdown of the motor, pressure roller or sensors. It is recommended to replace parts.

The device is heating up

The radio overheats and turns off on its own if the power system is connected incorrectly. It is necessary to check the wire; it may have become loose or damaged. The cable needs to be completely replaced. The radio does not work in the car even if there is insufficient ventilation. This problem is typical for budget devices; it does not lead to significant malfunctions. If the system overheats frequently, you need to install a ventilation system.

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• Pioneer car radio repair