Chinese radio - navigation - is poorly receiving radio stations

Hello.
I bought a Chinese navigation dedicated to Mondeo mk 4. Unfortunately, the radio has no name. I had read opinions before and were very divided, so I decided to take a risk and now I have.
The device itself seems to be in working order, working properly, everything except the radio, very poorly receives waves. It receives only strong transmitters and can also lose them.
During installation, I installed an antenna amplifier, which I got in the set, but it does nothing. Then the second, hoping that the other one was damaged, did nothing. I installed a regular roof antenna and still nothing. I gave the radio to complain, it turned out that the FM head was damaged, it was repaired, but the radio still does not receive the station. I just don't know if anything was done there, because before sending the radio I wrote the number. head and got identical or the same. Now, to the point whether such a head can be replaced with another, such XF TDQ-130V-61 (R) is mounted here photo www.xfa-module.net/products.php?pid=37 I don't know anything about it, but I have an amateur electronics friend and he has a lot of knowledge, but not large enough. If someone could tell you what you can do about it, it would be fantastic, because I like the radio and I want it to stay in the car.
Please help

You can advertise indefinitely and delude yourself that it might be fine but it's shipping waiting and unknown what the result will be. That's why my question is to avoid all this. I'd love to buy some branded solders and have peace of mind. I am convinced that this crap can be turned into something decent enough that my electronics colleague cannot match anything. As if you needed more info about the radio or the head itself, I can disassemble the radio and take pictures.

Added after 21 [minutes]:

This head is mounted.

You could elaborate on the topic, please, more in a peasant way. To be honest, although the answer is comprehensive, it doesn't tell me anything. I understand that nothing can be done? And on this analog will not receive? I'm sorry to ask about such things, but I will pass it on to my electronics engineer. Thank you for your interest.

Hello.
In connection with the lack of interest in my case (although I was hoping quietly that the professionals from the forum would overwhelm me with information) I began to think about myself. I noticed that when I touch a piece of wire directly to the solder head with the inscription "ant" the radio starts playing and receiving stations. I corrected all February (those outside the head) and the socket from the antenna with a piece of cable removed from another radio and soldered directly to the solder "ant" and the weight of the head. I desoldered the old nest. Now the radio receives surprisingly well only once in a while as if it creaks it happens rarely but still. Rather, I will try to bring this radio to slide down
these cracks. I am asking forum members again for help, what may be caused by these cracks. Maybe it's enough to mount some amplifier? Or maybe we should improve February in the whole head? Or something else. One more thing, someone will prompt if this radio can be connected so that the info on the conversation is displayed? If you need photos of the radio, cubes, wires, I will insert.

Antenna signal input is protected in quinols with two bi-directional diodes 1N4148 connected to ground. Check if any of them is short-circuited.

hello .wejdz w Settings / settings / there is the option of territorial settings - Europe, Eastern Europe, USA, China. Choose the last one - China and you have a problem with your head.

better late than later. I will check tomorrow and let you know. By the way, setting up a longer antenna did the trick.

Write a friend like with your radio. I have the same problem with the GMS radio. Throughout Poland only Radio Mary. Waiting for a hint

no settings help. These radios as they go work well as they don't work badly. I did wonders, amplifiers, other antennas, improving solders, actually mounting a longer whip solved the problem.

The solution to the problem of poor coverage of Chinese radio is the antenna separator. Chinese radios do not have such and the factory mainly in the Volkswagen group have already been built. Antenna separator costs pennies. best regards

crassio wrote:

The solution to the problem of poor coverage of Chinese radio is the antenna separator. Chinese radios do not have such and the factory mainly in the Volkswagen group have already been built. Antenna separator costs pennies. best regards

Only that the topic is about a Ford and you do not need a separator.

I have the same thing in Renault Megane2 the separator didn't give anything, on the contrary it didn't catch a wave at all. No tricks in the radio settings did nothing, I found it so. I have an android radio. In addition, everything flashes as the factory gave.

astra97 wrote:

I have the same in Renault Megane2

The problem is not equal to the problem, if you expect specific help put on a new individual topic under your own specific equipment describing exactly what this radio is, etc.

As for the subject itself, please refer to interesting reading where the reasons for poor reception and sensitivity enhancement are well presented.

Radio module (tuner) TDQ-130V-61-C
Manufacturer Info:
Translated from Chinese:
"chip: NXP TEF6622 FM reception range: 87.5 MHz ~ 108.0 MHz MW: 522KHz ~ 1602 kHz with IF frequency FM: 150 kHz AM: 1 = 2nd = 150kHz 25kHz tuning voltage 0.8Vmin ~ 8.0Vmax mode impedance input and FM: 75? unbalanced Formula standard voltage 8.0V in the temperature range from -20 ° C.] C ~ + 70 ° C.] C dimensions 35.6 x 25.85 x 8 mm "

Photos of the interior of the module: The interior may differ from the pictures depending on the released series. Source

please can anyone help me here
https://www.elektroda.com/rtvforum/topic3740074.html

I have the same Chinese Android radio, I bought the most expensive one for PLN 1,200 and the radio is poorly received.

To be honest, I have not yet seen a Chinese miracle radio in which the tuner in Poland would work properly. All the customers who brought me such radios for repair (regardless of the car version) complained about problems with the quality of UKF reception. The rest of the radio always works reasonably well.

Can it be improved somehow? Any modification or additional amplifiers? It is true that I sent this radio back, but I would like to buy it again with Android, but I care about good FM reception

And it's not that the factory-fitted radio may not be in all models of cars, but probably in the newer ones it uses an antenna amplifier which, after replacing it with an Android radio, needs power supply and maybe in some cases it is not connected when mounting and even adding an external amplifier is nothing it does not give, because there is a factory amplifier on the way which, if not powered, somehow suppresses the antenna power. Of course, it's such a guess. Another issue is, for example, disturbances from the alternator not filtered disrupt the operation of the FM module. Or even a poor-quality USB charger plugged into the cigarette lighter socket can significantly affect the quality of radio reception. I had a case where the converter was so disturbing that only the replacement with a branded power supply did the radio revive. Anyway, I agree with my colleague above. The Chinese must pay off and the fact that he sells dud is a different story.

This Chinese radio has a divider that goes to the amplifier, but whether it is powered or not, the radio receives the same.