Amplifier for cars from the non-working radio. Amplifier for auto from the non-working radio prior amplifier criteria for radio tape recorder

I, too, like many here, became the owner of this car, everything suits me, but some kind of sound is not so, as if it works in the load, there are no normal high, there are no more modest. There is a predominance of medium frequencies, which is not a matter for audio engineering that should be brightened by the road. With such a sound, it is usually either the head begins to hurt, or the road is tired even more. Therefore, probably they are not so popular, and probably everyone strive to change them. Although many are trying to correct this problem with the replacement of acoustics, from going out of their experience, it is soon a consequence of the problem and not the problem itself!

So, instead of putting acoustics and wise something with the replacement of the maphoon there is an elementary output! True, he is expensive for someone, but for someone and no.
And so that it will take is to replace the rear speakers to more powerful on your taste and 4 ohms, it is better to check the tester a little more than 4 ohm is allowed, less
The second and most importantly. It is replacing the regular amplifier of the car radio which is in it, inside, I'm in this moment I am engaged in the selection of the chip of the amplifier on dates.
In the car, the Chinese amplifier is installed LA47201. - The microcircuit is in JVC KD-G425 and in many other similar maphunes, the price of such a chip in the stores near LA47201- 245.60 rubles.
I worked for more than a year and a half in the service center for the repair of the car engine. In JVC, I put Mikruchi with a pioneer and in a pioneer with JVC, now to pick up analogue and lay out information on replacement.
Well, as expected, a chip from a row is weak, from here and so attitude to the speakers, as the manufacturer writes recommended by 8 ohms, but can work with 4 ohm
You can put any available available from: TDA7381-7386, TDA7560, TA8263-8268, TA8271-8277, TB2901-2906, LA47501-LA47515, LA4743, etc. The only one, pay attention to 1, 10, 16, 25 legs, well, they have a different one - it is taken from the forum, writing for a long time (it was meant that chips can be fake and the pinout can also be different from them)! Price for such chips up to 500 rubles
I only add, changed this chip on PAL007 The price of such a chip in Novosibirsk from 900 to 2000 t p standing in all pioneers, the difference in the most expensive magnitol models, only in a linear better amplifier!

At the moment, I charge the batteries on the fotik, then lay out pictures for understanding, the rest of the warning that all the work done on the replacement of the amplifier chip, maybe with the error of it and falling, damage pCB and lead to k.z. (Again, I recommend contacting people who can fasten such chips, so that there is no problems in the future))
Well, all, I redid about the miracle of such a sound, I am on Sony's piley m9900 I did not hear. The sound has become more powerful, the bottoms even with full-time speakers, began to pump out !!! The quality has increased 100 times, and not by 5 - 10 percent, the only one does not stand with such a microcircuit to listen to full, bad for speakers. And so, the people, you don't even represent how it began to sound! And if you put a new acoustics instead of full-time, you will definitely be pleasantly surprised, and at the same time everything remains on the warranty of the radio tape recorder, then the main thing is to make everything qualitatively, and the alcohol remove the soldering tracks. 🙂

That's how promised, my photos for today modifications with my Mafon, I was very pleased!
And I wanted to say about the 25 legs, where I show the road, which is addressed above, it is done in order not to interfere, when the ignition is turned off the gasket from my alarm ....!
To carefully remove a standing chip, you can use suction, or it is gently breaking it, or cut the scalpel, I dropped out just in case, it will be useful for experiments or as a spare place.
It is better to put the chip to put the PAL007C, it pumps the bottom well, the only thing happened is not enough, it is high, but it is solved simply by installing the sakes. Now at maximum sound power, namely 33 when bass on zero, the speakers have no distortion and failures in power!
At higher bass, he also works well, but the speakers are already felt that there is not enough.
I will make a reservation again, when choosing acoustics, you can come with a digital tester and measure the resistance of the acoustics you want to take. It should not be below 4 ohms! This is the course of companies, real acoustics a little more than 4 ohms, it means that the number of turns more than in those where the resistance is lower, which means the range of reproducible frequencies is also narrows. So regular speakers 8 ohms have a higher spectrum of reproducible frequencies. But only on medium and Low frequencies, HF - is not enough, but the quality with such a rework is simply not compared with what it was that all!

If you are questions with the alteration, ask help what I can!

The owners of cars often fail the car radio, well, what to do, throw out a pity and repair at sometimes goes to the floor of the price of the Magnittol itself, sometimes more, and if the motorist is a little understands in electronics, then of course it will not throw off the non-working radio. Most often, the problems of the radio are associated with reading a CD, the drive is the most fragile place of the radio, and without it, the radio turns into a beautiful radio receiver.

If you bought a new tape recorder, I do not advise you to throw away the old one, since they have enough powerful and high-quality amplifier chips of the TDA series. For example, in this case, a 160-watt power amplifier was stood on the magnetol on the TDA7385 series chip.

Now I will tell you how to use it as a separate sound amplifier of low frequency which will allow you to get the addition of 4 channels by 40 watts each! The microcircuits are perfect sound parameters, qualitative reproduction low and medium frequencies.

Magnitols are mainly with electronic control, with modes Turning off sound and sleep, they also have the mode of the amplifier diagnostics, which is often not used. If you feed the power to a disconnected tape recorder, the amplifier will be in sleep mode, in order to exit such a mode, you need to turn on the system, but we will not turn on and directly on the board to remove the amplifier so that it works in the disconnected state.

Why you ask. The fact is that if you feed the magnetol loud sound signal The magnetic processor will perceive it as dangerous and turn off the amplifier! We will try to deceive the processor system, and for this I ask for attention to the TDA7384 series amplifier scheme .... TDA7388, all the same inclusion scheme! We see here mode<\u003e (Sound trip mode) and mode<\u003e (sleep mode).

Mute's leg does not touch, and the ST-BY layout through the resistor in 10 kiloma is connected to the bulk of the shared power. Now if you feed on the amplifier (radio), it will already be in ready mode.

Rear Magnitols have inputs where you can serve, the signal can be served from another radio or say from the MP3 player or a mobile phone.

Adjust the volume from that device to which the signal to the input of the radio.

Ultimately get a powerful low-frequency sound amplifier with excellent design, you can also turn on the radio and listen to the radio, now the processor high volume It will not be able to disable the system.

Good day to all owners of the car. I, like many of you, is an amateur loud and high-quality music. And it is especially pleasant to not buy a ready-made Chinese, but do everything with your own hands. One day you came to order an amplifying complex with all the amenities, including with the alteration of MP3 modulator, which was the heart of the complex and was to work as an unconventional way, that is, without a radio receiver. There should be a good multichannel UNG. And what acoustics without a subwoofer? In general, it was decided to create powerful amplifier Based on the legendary Lanzar, and of course quad amplifier to support the rear and front acoustics of the car. The amplifier itself has a power of about 450 watts total. And the power of the subwoofer channel is about 300 watts.

Why did Lanzar chose? Only he has the best parameters from the ax amplifiers who did within 5 years. Lanzar is a relatively expensive amplifier, but if you wish the Bass and Quality Peak, I advise you to assemble this amplifier. There is no on sale TakiX dynamically for car subwoys, for which the power of our amplifier would be unlikely. The program for creating an audio complex is divided into separate stages. 1 - alteration of FM modulator,

2 - create a small power amplifier for the modulator in the case from the car radio,

3 - assemble a box for a subwoofer,

4 - Create an amplifying unit in which the amplifier can be encountered, the Lanzar monoblock and the Quad Amplifier based on the TDA 7388 microsystem and the voltage converter, although the converter collected at the very beginning of work. Now let's talk about each of the stages separately.

Alteration of FM modulator

The remission of the FM of the modulator is made in order not to suffer over the purchase or recording of the discs for the radio, in one word a cheap solution solution and as a result, the sound is not ourselves than that of the highest car radio from the best manufacturers. Alteration takes only a few minutes. Just disassemble the modulator, heating the soldering iron. There we see the audiovyxode, we solder the wires as shown on the photoX - one to minus the nest, the other - to the audio at the same time. Then we close the housing, removing the soldered wires outside.

You can avoid alteration, simply inserting the corresponding plug into the audio modulator. The first stage is completed and to check the work can be connected to the AUX current music Center Or to the encode of any power amplifier, if you are heard of the workflower from the memory of the flash card - everything is done correctly.

Preliminary power amplifier

Preliminary UCH is a small power amplifier that will play a role. pre-amplifier The signal running from the FM modulator, and we do this in order for our amplifier in the car to give its maximum power of 300 watts. But really he will not work at the peak because the subwoofer will not last for a long time. Yes, and the battery is not eternal. A preliminary amplifier is desirable to collect in the case from the car radio to complement the design, but if you already have a car radio, then you should not do a pre-amplifier.

The amplifier is assembled on the LA4445 microsem, this microne is perfect for this role, it has a capacity of 4.5-5 watts per channel. In its version, another pre-amplifier was used, but you should not do this, because the system works fine and without it. After assembly, the amplifier is placed in the body from the car radio tape recorder in advance plug the volume control. There should be no current sockets, because we will connect directly with wires.

The photo of the power amplifier scheme is shown in the photo above. The second stage was passed, the continuation about read here.

Discuss an enhancer in the car