DIY pioneer radio repair

Aradio is a very common electronic device. With rare exceptions, this undoubtedly useful device is not present in the car. The evolution of car radios is the video recorder and the car CD / MP3 player. But despite changing the recording medium in a car player, these devices are still referred to by the familiar word. car radio... It has been well established since the massive use of car cassette players.

Danny the section of the site is devoted to the issues of repairing car radios with your own hands. It's no secret that car players of various modifications and manufacturers break down.

Non the pages This section will not be a simple listing of specific malfunctions of certain car radio models, but methods of repair and restoration of these devices will be revealed. The presentation will be conducted without interrupting practice, with examples of repairing specific models of car turntables.

Introduction article. It describes the necessary devices that will be required in the process of repairing car radios.

How to connect a car radio or car CD / MP3 receiver to a computer power supply (PSU)? Anyone who wants to "power" a car radio from a 220V network faces this question. This makes sense if you plan to repair the car radio or upgrade it to a stationary music center.

Here you will learn about typical car player malfunctions and their causes.

What is a complex malfunction and how can error codes help in car radio repair? A real example of troubleshooting a complex malfunction of the Pioneer DEH-P3500MP car CD receiver.

When repairing disc car radios, it is often necessary to disassemble the CD mechanism. Shown in detail is the method of disassembling the CD mechanism, which is widespread among modern car CD / MP3 players.

CD drives for car receivers of different brands differ in their design. This means that you need to be able to disassemble CD mechanisms of different types. Here you will learn how to disassemble the CD drive of the Kenwood car radio without errors.

An article that tells about one of the typical malfunctions of car CD / MP3-receivers - there is no display backlight. How to fix this breakdown will be discussed.

Here we talk about an atypical breakdown of the Mystery MCD-778MP car CD / MP3 receiver. A real example of repair using an oscilloscope.

The volume control of the car radio does not work? The knob may be the cause of the problem. The rotary encoder is very often used in digital equipment to adjust various functions and control the device. Is it really necessary to replace the rotary encoder if it does not work correctly? How to restore the correct operation of the knob and avoid replacing it is described in this article.

In the practice of repairing car players and CD-receivers, there are cases when a schematic diagram, information on the pinout of the connector or a table for decoding error codes is needed. This information is contained in the service manual for a specific car radio model. You can download the service manual for some models of popular car radios by clicking on the link above.

Which brand of car radio should you choose? Read this article and this question will disappear forever.

Find out about the device of SD / MP3 car receivers. Among all kinds of modifications of car radios, so-called flash car radios have found their place under the sun.This article examines the device and the elemental composition of car SD / MP3-receivers without a disk using the Velas V-201U model as an example.

Car radio repair pioneer - as everyone knows that nothing is eternal. Similarly, car audio equipment has a tendency to wear out gradually. In this article, we will analyze how to troubleshoot a car radio. For example, on the basis of when the head unit cannot turn on or turns off during operation.

The first step is to find out the main reasons for which the device does not work:

1. One of the main signs that the head unit is not working is trivial contamination of its mechanical components. When using the radio in difficult conditions, dust can get inside the case and thereby disable units and elements of optical and mechanical purposes. One of the proofs of the formation of dirt on the mechanisms is the braking of the disc and the inability of its correct reproduction of music.

2. The next factor that determines why the car radio does not turn on is technical malfunctions. Such a breakdown may include the supply voltage path. It is this problem that arises as a result of the incorrect initial connection of the head unit. The lack of illumination of the radio tape recorder scale or the inability to turn it on, this is already the first sign of a malfunction in the supply voltage circuit.

Car radio circuit board

Before you start car radio repair pioneer and dismantle it from the car, try to study the main malfunctions that occur in the radio equipment. Indeed, before starting the repair, you should definitely know what exactly is to be repaired.

1. With such a symptom, the first thing to do is to check for the presence of a + 5v supply voltage. Then we check the voltage + 14v on the second pin of the CN701 connector, which goes to the collector circuit of the output transistors. In the absence of + 14v voltage, most likely one of the transistors or a zener diode has failed.

2. Not supply voltage signal. In this case, the IX901 controller is checked, in particular its fortieth contact, which should have a voltage of + 4.8v. In addition, there must be a pulse voltage at the third contact of the controller.

Car radio repair pioneer - ringing out with a multimeter

There are many options for such a malfunction:

1. There is no sound when starting the engine, or when you add volume it disappears. As a rule, such a problem is created due to the absence of the Stand-By signal. With such a malfunction, the presence of a + 4.8v pulse on pin 4 of the IC901 microcircuit is checked. If there is no sound and impulse, then most likely the problem is in the controller and it must be replaced. In addition, if the sound disappears when starting the engine or increasing the volume, check the reliability of the power amplifier contacts.

2. When starting the engine, the sound is colored with a strong background. In the case when the background appears when the sound volume is increased, it is necessary to determine the presence of voltage in the base circuit of the output transistors. The value of the voltages at the base terminals of the transistors must differ from zero. If the sound takes on a background tint when the volume is increased, and there is no voltage at the bases of the transistors, then this may indicate a malfunction of the transistors. Another reason for the occurrence of a background when the sound volume is increased may be a malfunction of the mute button or damage to the controller itself. Also, with such a problem, the Q802 transistor must be checked.

3. Malfunctions in the audio path of the radio can appear due to problems with the capacitors installed in the circuit, so they also need to be checked. Any module in the system that passes the audio circuitry must be tested from the input stage to the output.

Sometimes there are situations when the head unit does not read the flash drive or CD after the car engine has started. Either the disc is jammed in the drive, or intermittent playback is in progress, the device does not see the flash drive.

The reasons for such problems can be the following:

1. It is possible that the playback device is simply unfamiliar with the format in which the recording was made. Try a different disc format.

2. When the system cannot detect the disc when starting the engine or it is stuck in the drive, the playback is intermittent. This can be due to dust trapped on the optical lens. Everything is clear here - you need to remove all the dirt with improvised means, and for the best effect, use a special disc for cleaning.

3. Also, another possible reason could be the lack of voltage on the laser. With such a malfunction, you need to try to adjust it.

4. One of the reasons for the breakdown of the system can be the failure of wires or a loop. Even during the operation of the car, the fastening screws inside the device loosen, which leads to a distortion of the structure.

A car player, the main purpose of which is initially high-quality reproduction of music records from a tape cassette, CD-disk or flash card during a trip or a long wait (in traffic jams), very often upset its users with the following breakdowns:

• lack of sound;
• poor sound quality. wheezing, squeaking and so on;
• refusal to play records from cd, mp3-disks.

How to disassemble?

That is, for the most part, in violation of their direct duties. We will tell you in more detail what to do if sound disappeared on your car radio (Mystery, Pioneer).

The display lights up and gives information that the CD (flash drive) is being read, but there is no sound. Often this situation occurs with the following breakdowns:

• disruption of power supply circuits;
• failure of the speakers (speakers) of the car;
• amplifier malfunction;
• violation of contacts (solder) of the device;
• closure of the electrical circuit;
• the use of a powerful acoustic system that exceeds the technical capabilities of the radio.

The first, the main method that should be used in the event that your sound-reproducing equipment has lost sound is to ask for help from a specialist: to conduct a diagnostic examination of the device itself and its components in order to determine the cause of the breakdown and eliminate it in a specially designed technical center. You should not start doing self-repair if your device is under warranty service. Very often, the masters working on this profile, upon detecting external interference with the player, simply remove it from the warranty. This means that you will pay separately from your own pocket for equipment repairs.

In the case (second method), when the warranty period has already expired or it did not exist at all, you have the knowledge (initial), the necessary instruments and tools, confidence in your abilities, you should try to restore the device to work with your own hands.

Do-it-yourself repair of the Mystery radio tape recorder in case of suspicion of electrical circuit failure is carried out according to the following scheme.

With a multimeter, nickname the sections of the circuit in contact with the car radio for detecting a malfunction. As a rule, this can be a burnt out capacitor. We replace it with a new one. In the event that such a breakdown does not occur for the first time, we replace the capacitor with a more powerful part in terms of capacity.

Failure of both speakers is a rare occurrence. This usually happens to one of them. But then the sound does not disappear at all, but only worsens. If, nevertheless, both speakers are silent at the same time, use a tester to look for the cause in a broken contact with poor insulation, a short circuit, a malfunction of the power circuits or an amplifier breakdown is possible.

To repair the radio with your own hands, if the sound does not turn on, and more specifically, to replace the amplifier, you will need the following tools:

• soldering iron;
• solder;
• Screwdriver Set;
• tweezers;
• pliers;
• new amplifier board.

After preparing the named tools, we proceed to work in the following order:

• We disconnect the radio tape recorder from the on-board power supply after removing the device from the receiving socket.
• Remove the bottom and side covers of the device, the front panel.
• We release access to the replaceable amplifier board.
• With a preheated soldering iron, we soften the solder of the board.
• We very carefully straighten the bent ends of the latches holding the electronic board with pliers.
• We remove the board.
• Protecting the nearby parts and microcircuits with foil, carefully solder the worn-out board and remove it.
• We prepare the seat for the new part by removing the remnants of the solder and degreasing the seat with ethyl alcohol.
• We install a new board, if necessary, align its mounting legs with tweezers.
• We fix the part by soldering the legs.
• We check the correctness of the work performed with a multimeter for new damage, possible with careless handling with a soldering iron.
• We collect and install the car radio in its usual place.

Replacing the amplifier (board) is the most difficult and expensive DIY car player repair with complete or partial sound disappearance. The same faults as a violation of the integrity of the solders and a short circuit of the electrical circuit are detected easily and quickly, and are corrected with a multimeter and a soldering iron.

As for the loss of sound after you install a more powerful speaker system in your car that exceeds the technical capabilities of the radio, simply adjust their parameters necessary for high-quality and full-fledged playback of sound files.

We consider it our duty to remind once again that any actions to repair the acoustics of a personal car (with the exception of frankly minor malfunctions) are best left to professionals, despite the high cost of this kind of work. If you make mistakes during the repair with your own hands, you can be left not only without sound, but generally render the entire audio system unusable. Therefore, before starting, carefully study all the available information on fixing a breakdown, as well as photo and video materials related to this issue.

Several alterations of car radios from American to European standard: Toshiba TX-10 (unsolder D 710), Craig D 309 (rearrange to D 304), Panasoniс CQ-I05EU (unsolder D 625), Pioneer KEH-7500 (unsolder D 508), Toshiba TX -90 SM11 (unsolder D 864), JVC KS-RT45 (unsolder D 717), Panasonik CR 301 EVA D 621-add, Pioneer KEH-5500 unsolder D706, Pioneer DEN 415 R607 swap to R611, Panasoniс R 520EUS unsolder R613, Audiovo -949 (D607, D609 rearrange to D608, D615), Sony XR-7070 (D 322 add), Pioneer KE 1550 (add D - ES), Pioneer KEH P4400 (R 683 add), Sony XR - C300 (unsolder JC 12 ), Pioneer KE 1818 (D954 to rearrange to D952).

Decoding car sound systems: If Brother asks for a code, press 6 2 6 1 2 1 (the display will show - 7621) then BAND and that's it. If you dial the new Blaupunkt with the tuner 9507, then BAND. And if Hyundai H-810 JE - press and hold the BAND button and turn on the power.

LG TCC573, etc. - the muzzle does not work The problem of IR LEDs To check them and also to repair the remote controls I use the following gadget.

D1- any is better than red

D2 - from any video sensor of the beginning or end of the cassette

TR- any I have it built into the tester does not consume 3V power in STBY. Sent by Panov Valery

CDX 805, 505. The defect manifests itself approximately like a half-dead laser (loses tracks, works unstable, etc.) the whole point is that you need to solder the variable resistor RV14, it stands near the driver, which gets very hot.

I wonder what's inside the KEY card?

LG TCC-570. Fault: the radio tape recorder does not work, power is not supplied. The cause of this malfunction turned out to be an open circuit of the low-resistance resistor R813 (

0.5. 1 ohm) in the front panel power supply circuit. After replacing it with a new one, the operation of the radio was restored. A similar malfunction was also in the LG TCC-673 car radio (the same R813). One case is an incident, the second is suggestive, and the third is a pattern. It remains only to find this third case.

Fujitsu Ten Limited of different models (installed as a head unit in TOYOTA's 87-94). Externally manifests itself as a failure of mechanics or lack of sound, or self-excitation of the amplifier or lack of stereo reception. Treatment: electrolytes in red shells are looked for on the board and removed, the board under them is thoroughly washed and any others are soldered in their place (as a rule, these are 100x10 and one 220x16).

Autoradio tape recorder Sony XR-242 Conversion of the range from Japanese (76.0-90.0) to ours (88.0-108.0), unsolder the diode D701, in addition, in a particular instance, the tuning voltage had a smaller range (could it have been calculated that way?) From 0.5 to 4.5v instead of 7.5. Resistor R752 (planar) 10K is changed to 2.2K. They set the voltage to the FM VT.

JVC KS-RT404 Conversion of the car radio from American to European standard: solder D701

FUJITSU TEN car radios installed as standard in TOYOTA - quiet or gurgling sound in one or both channels - electrolytes flow near the playback preamplifier (M51524L), the tracks under them are destroyed, especially the transitions on the boards. This defect has become widespread - it reproduces records in one direction normally, in the other - the words vice versa. The playback amplifier is M51524L 4-channel, the head is switched by a signal from the MB808505 processor (pin 12). At a low level, playback is normal, high-above 2 volts does not rise. If you disconnect pin 7 M51524L from the processor and apply 5 volts to it, then the reverse starts working normally. processor output is hooked up. You can do without replacing it, with a minimum of alterations - just apply 5 volts to this leg through 100 ohms, for example, from the processor power supply regulator - the defect was caught 5 times in a month!

Clarion PN-9401 car radio is standard in Nissan of the early 90s. The playback quality of magnetic recordings gradually decreased, the sound became quieter until it disappeared altogether. The sound came from the receiver perfectly. On the right, under the CVL, there is a ceramic scarf - on the reverse side, there is a playback amplifier (TA7705F) and a DOLLBI system, and about a dozen electrolytes for surface mounting are installed on top - EVERYTHING leaked and lost capacity. They are replaced with ordinary small-sized ones, well, it is very difficult to solder them - the substrate strongly removes heat and there is very little space.

CD + tuner ADZEST DRX 5475 Does not accept disc - works only for ejection. The loading start sensor is made on optocouplers - on the bottom board there are IR LEDs, at the top - phototransistors - a typical disease - a decrease in LED emission, by the number of failures for this reason (in any equipment) they approach dried electrolytes. The cure is simple - halve the limiting resistor.

The car radio, like any other device or mechanism in the car, can fail. As practice shows, the repair of car radios is usually carried out in the event of improper operation of the device or in the event of malfunctions not related to use. In this article, we suggest that you familiarize yourself with the main causes and methods of eliminating audio system breakdowns.

It's no secret that over time, the mechanical elements of a multimedia system tend to wear out. So, if the system does not turn on or off, it is necessary to either repair or replace it.

But first, let's figure out the main reasons why the radio tape recorder does not work:

1. Dirty device. If the radio tape recorder stops working, this may be due to contamination of the mechanisms - dirt or dust can accumulate between them, especially if the system is used in harsh conditions. As a rule, optical or mechanical components break in this case. One of the signs of contamination is a disc that is stuck and cannot play properly.
2. Also, mechanical failures can be the reason. This type of failure is usually associated with the power circuit.If the connection of the head unit was made incorrectly initially, or the electrical circuit is characterized by sharp drops, then there is nothing to be surprised at. The first symptom of problems with the power circuit is the lack of screen backlighting or the inability to start the radio.

Car audio system board

Before removing the radio from the car and starting to repair it, read the list of faults specific to audio systems. Getting and repairing the car radio from the car is not such a problem, but before you pull it out, you need to know exactly what to repair.

1. Perhaps the problem is the lack of power at +5. If you decide to get the device and repair it yourself, first of all you need to pay attention to diagnostics of the second contact of the CN701 connector. It should have a voltage in positive territory of 14 volts, this voltage should be transmitted to the collectors of the transistors. If there is no voltage, repairing car radios consists in 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 at the fortieth contact of the IZ901 controller. You should also check for a pulse on the third contact of the controller.

Dialing a multimedia system with a multimeter

Repair of car radios on your own or by a specialist is required if there is no sound volume or when the volume is increased and the tracks are played, the sound fills.

There may be several options:

Why does the radio tape recorder not read a USB flash drive or disc after starting the engine? The disk is stuck, stutters, the system does not see the USB flash drive?

The reasons may be as follows:

1. The radio tape recorder does not read the USB flash drive, does not see the disc, or the disc stutters or is stuck after starting the engine. Perhaps the device simply does not understand the recording format. Repair of radio tape recorders in this case is not required, you just need to burn the disc in a different format.
2. If the system does not see the disc when starting the engine, the disc is stuck, stutters or heats up, this may be due to contamination of the optical lens. As mentioned above, problems in the operation of buttons and the device as a whole after starting the engine can be associated 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 self-clean the system by blowing the elements or cleaning 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. Perhaps, during the operation of the car, the screws inside the structure simply loosened, or it could be a leakage of resistors.

Buttons do not work - there are several reasons. First, it may be mechanical damage to the buttons. To restore the functionality of the buttons, you need to disassemble the front panel and check the condition of the contacts. Perhaps the contacts from the buttons simply leave and they need to be re-soldered. If the button is inoperative, then it will have to be changed.

Secondly, the problem with the buttons may be due to a software malfunction. The malfunction is solved by rebooting the audio system and returning its functionality to the factory configuration. All settings will be erased from memory. After returning to factory settings, the device must be turned off for a few minutes.

If the radio tape recorder heats up and turns off arbitrarily, there may be several reasons:

1. The system heats up and shuts down as a result of poor power supply. Lack of power will cause the radio to turn off arbitrarily, or this is due to power failures. When the radio tape recorder heats up and turns off, you need to check the power cable - it may just come off or break, then it will have to be changed.
2. The device heats up due to poor ventilation and turns off when overheated. If the system heats up, this indicates insufficient ventilation.Such a malfunction is relevant for Pioneer radio tape recorders and, as car owners of such systems assure, there is nothing to worry about. But if the system heats up constantly and turns off at the same time, you need to think about additional ventilation.
3. Sometimes the device turns off due to software glitch. You can try to solve such a malfunction by resetting the radio to factory settings.

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

Car radio does not turn on at all. This may be due to a lack of power. You can check the power yourself or by contacting an auto electrician service center. If the reason lies not in the diet and everything is in order with it, it is necessary to carry out a diagnosis.

The absence or disappearance of the backlight of the control panel. Cause: This malfunction may indicate that the light sources (LEDs or bulbs) or the power supply circuit of the control panel are out of order.

The car radio does not read at all (the inscription NO DISK or ERROR pops up) or reads discs poorly CD or DVD... The cause of this malfunction may lie in the laser head, the motor spinning the disc, or in the main control board.

When the car is shaking while driving (on a dirt road, for example), the disc reading gets lost. Reason: this defect may be associated with a breakdown of the shock absorbers of the radio or laser head. Eliminate the malfunction by repair in the in-patient 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 the in-patient service center. If everything is in order with the speaker, then the malfunction may be associated with the failure of the power supply circuits or the preamplifier of the car radio, as well as its output stage.

The inscription "Please code" pops up. This means that the problem lies in the factory reset. To eliminate this, you need to enter the code for the head unit. Contact the service center.

V CD / DVD car radios the disc does not load or unload. The cause of the breakdown may lie in the disc loading motor, its control, power supply, or in the pressure roller. As a result, the disc may slip and not be seized. It is also worth checking the disc sensors.

Many car enthusiasts do not pay enough attention to cleaning the dashboard of the car radio from dirt and dust. Heavy contamination of this appliance can also cause frequent and unexpected breakdowns. Dust and dirt clogs the openings and exits of the car radio, therefore, inevitable contamination of the optics and mechanics occurs. "Symptoms" in this case will be frequent freezes, failures during playback and not loading a disc or USB-flash drive. You can fix the damage yourself: disassemble and clean the lens of the laser reader.

Failures associated with the supply circuits can lead to the device not turning on at all or no functioning of any modes (no display backlight or no sound or CD mode). The absence of sound may indicate that the UMZCH burned out. In such cases, check the protective fuse, inspect the printed circuit board, inspect the microcircuits for damage to the case (deformation, chips or cracks). Electrolytic capacitors may have swollen or tracks burned out.

If nothing was found visually, then it is better to contact a specialist, since attempts to eliminate the malfunction on your own can lead to even greater problems.

Autoradio tape recorder Supra SCD-304U, does not read USB and microSD disks. He sees that the connector is connected, shows on the board that there is a medium, but does not read the files. What can you suggest. Thank you.

The laser head may be defective or dirty.

What does the laser head have to do with it? She reads flash drives.

If the laser is faulty, then neither discs nor flash drives will be read.

Victor, do not be offended, but do not be misled, and here is the disc to the flash drive, if the laser is dead then the discs will certainly not be read, but you can even remove the laser, but the flash drives must be read one hundred percent, these are two different systems, by the way. I have a radio tape recorder on the run now, it works from a flash drive and the laser loop is not even inserted.

It's clear. We must try to clean it. Do not give a link on how to do it correctly.

Good day. I have a Eurotec EU-9991DVD radio tape recorder. The problem is that the disc does not load. I found a badly soldered connector on the boot engine, soldered it, started assembling and saw a burned out resistor on the main board, next to the connector of the loop going to the CD drive board. I can't find the circuit for the radio tape recorder. The question is, can the download fail because of this resistor? And how to guess its denomination?

Hey! Maybe, of course, a diagram is needed.

Can you have any sources where you can find the circuit?

And then I have all to no avail.

Hello. I have a sony cdx gt457ue radio tape recorder and only the button of which brings out the disc in the middle of the drive, and the display backlight itself ... the inscriptions are sooo poorly visible on the display, only at a certain angle. and so ... I put the socket from it on the sony cdx gt450ue radio tape recorder and everything glows and shows on it. I put the socket from 450 to 457 again the same problem with the backlight. I think that the problem is in the radio itself. how can you repair it, and will it work out yourself without resorting to the help of a master? Thank you)

Hey! I can't say specifically, perhaps the panel power contacts are unsoldered. It is, of course, better not to bother yourself.

Good afternoon. Sony's radio tape recorder, The buttons are confused, you press the button to turn on does not turn on, you press the button to release the disk, it turns on, and with the same button it switches from SD, to radio, to usb
no more buttons do not work and the sound is also not reduced or added. sings like the last time the sound was
it turns off itself, and immediately turns on and starts switching SD, to the radio, to usb
it was once driving, it turned off, then it turned on, immediately the disk went out and everything worked right away, then again after three days everything returned,
Tell me what could be?, Or where to find the reason

Hello Anton! In car radios, over time, problems arise with the buttons - they wear out and lose conductivity, so when you press one button, the other takes place. Replace all buttons in the panel.

Good afternoon. On my ff2, the head unit suddenly started asking me to enter the code I entered, it worked and so twice, but now I enter the code, the screen goes out for a couple of seconds and again let the code stop turning on in general, can you tell me it's worth bothering with the repair?

Hey! Probably the firmware has flown. The workshop will be eliminated.

Hello Victor, on my pioneer p88rs radio tape recorder, when the volume is increased from 5 to 20, a crack appears in the right front speaker, I checked it with the low frequency and the line-out in the same way. After 20, everything is fine. The speaker changed to another the same thing, what could be? Thank you.

If there is also a crackle from the line, then the preamplifier.

hello!
My problem is this - Akum is charging and I turned on the radio, it played for 5 minutes and then turned off. I think from overvoltage.
Sony radio tape recorder.
Where to look first.
And also, when I connect + s- it sparks for a moment and the screen blinks slightly (if it is overlooked).
Know that something burned out on the board? help I will be grateful! !!

Hey! open, see power circuits.

do not know where to look. where to pick with a tester. ))?
Something is shorting, and there is still a question: how to check the capacitor? it feels like - + somewhere overflowed. or something burned out that the current is like, "remakes"

call the power chain from the start. swollen conduits change.

Good afternoon. Immediately I apologize for the question, maybe I am far from an electrician, but to do diagnostics for thousands of kilometers from the words is not gut. I just want to know the direction of the problem so that the master is not lit up.
Native radio tape recorder, standard speakers.After a while, only one speaker began to wheeze on the bass. After a while, she fell silent. I rearranged a new column in its place, a week later everything was the same: first wheezing, then dying. So covered 3 columns. Is there a problem in the wiring or maybe in the radio? The time of dying with wheezing is about a month.

Hey! Maybe in the wiring, maybe in the radio. In the radio, check the output on which the speakers burn out.

Thank you. Let's search with mother-of-pearl buttons

hello. )
I have essentially the same problem with the LG lcf620ip radio tape recorder, the problem appeared in the usb port and then after its cd mp3, so the power is on usb and he does not even see it on the display. drip .. you wrote here that maybe the head of the laser can be hammered, I used it very little so there is very little dust or not?

I will also add that he writes error on cd mp3 and by the sound he does not even want to start the disc ... and with the speaker there is an impulsive sound of medium frequencies .. can you tell me if you can fix problems with your hands not from your ass) do I know a little about electrics?

Perhaps a laser, perhaps a motor ... so I won't answer, you have to look.

thanks ... I'll check ... if no, I'll give it to the specialists ... most likely the chip needs to be inserted through the programmer, I don't have such equipment and I don't know which chip ... as I understand it, by blowing the laser head, the repair with my own hands will end with me /..= (damn

good afternoon, buttons on the car radio are spontaneously pressed.
when playing from a flash drive, it spontaneously switches to the next track
in the radio, the search for stations is turned on, the band is switched, the TA mode is turned on / off
either just turns on if it was turned on

sometimes spontaneous pressing occurs either when hitting a bump, or by itself

Hey! Replace buttons. The buttons get dirty over time and this situation begins.

there are microswitches, I disassembled one of them, the one that was most often pressed spontaneously - inside it looks clean. I did not collect it back, I left it on the board. And all the same, this button, which does not have, is spontaneously pressed

Perhaps somewhere on the board there is a cold soldering or a firmware update.

I examined it with my naked eye, I didn’t find cold rations. If the buttons squeeze when hitting bumps, then it is logical that the reason is cold soldering.
And if it's still a firmware, what can I do with it?

If the buttons squeeze when hitting on bumps, then it is logical to assume that the buttons are dirty and must be replaced!

Hello! I have such a problem, I turn on the radio tape recorder, and only the volume roller lights up and goes out, the display does not light up, the last thing I did was add loud music, she played and went out of silence, what can I do, can I repair it?

Hey! It can be repaired ... maybe the electrolytic capacitors or the sound microcircuit are out of order.

Hello! I have such a problem. the Soundmax radio tape recorder worked well, after the start it turned off and the sound began to freeze. after it turned off, and now when the power is turned on, the display comes out and the backlight is on and no more action. Buttons do not work, only cuts. What could be the problem?

Hello. Tell me please. I bought an NRG NDV-401 car radio and dropped it during installation with my holes full of hands. After I connected it. The flash drive reads but there is no sound. What is the reason?

Hey! Well, the simplest thing is that something has been sealed off from the blow or has fallen off. It is necessary to open and view the tracks and details.

Hello! I bought a mafon almost the same as my old cat. glitched. I connected the connectors with power supply and speakers for testing. It turned on normally. I set up an FM channel, checked all the speakers, TV too, Navigation Map. The disc was native. While studying the oa went out. Includes a cooler and backlight. Nothing Head tilts. Radio c6001 nkcp-d59 What could be? Thanks! Fedor.

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