It happens that you press the buttons on the remote control, but the TV does not listen. This is especially annoying (if not simply infuriating!) when you are already perfectly seated on your sofa or in your favorite chair, but the remote control doesn’t work, and you don’t feel like getting up.
But, nevertheless, you will have to get up from the sofa, because you need to find out what the reason might be, the remote control is faulty, or maybe something suddenly happened to the IR receiver on the TV itself. You can check whether the remote control is working very simply and you don’t need any complex devices for this.
We will do all this using a regular cell phone.
We check the remote control using the phone. How to do it?
In general, this method works not only for TV remote controls, but also for other devices. Here everything depends not on the device for which this remote control is used, but on the operating principle of the remote control itself.I’ll say right away that this method only works for remote controls that operate on infrared radiation. The majority of these still remain, although now there are also radio remote controls for TVs and other devices. You won't be able to check them this way.
What do we need for verification? An ordinary cell phone of any model. Nowadays there are probably no phones left that do not have a camera. It is the camera of your mobile phone that we will need to test the remote control.
The same can be done with any digital camera. But, holding it is not very convenient, and it is especially problematic if it is quite bulky and you have no one to help you. So, the ideal option is to use your phone for this.
What are we doing? You just need to place the remote control from your TV under the phone’s camera (the camera is turned on and the picture from it should be displayed on the display). This must be done in such a way that you can see the infrared LED in the camera, which is located on all infrared remote controls in their upper part.
Next, you simply press any button on your remote control and at the same time see what your phone’s camera shows you. If the remote control is working, then it should send an infrared signal, and you will see it on the phone.
The infrared LED will flash purple on your phone's screen. This means that the batteries are “alive” and your remote control is working. Although, if the batteries are a little low, the brightness of the signal drops. But, you will still understand that your remote control is working. To be completely confident that it is fully operational, you just need to replace the batteries with fresh ones.
If this helps and your TV starts listening to the remote control again, then very good. Well, if not, then look for the problem in the TV itself. It is quite possible that the infrared signal receiver on it is faulty, or something else happened. Here the problem is more complicated than checking the remote control at home.
Modern stationary household appliances, televisions, stereo systems, home theaters, air conditioners, etc. are controlled, in addition to the buttons on the device itself, using a remote control (RC). A faulty remote control makes the device ineffective and causes a lot of inconvenience to users, not to say that it turns life into a nightmare. In this article we will look at how to do it using a video camera, camera, built-in camera of a tablet, smartphone or other mobile device.
Just a little theory, in an accessible form.
How does remote control work in modern household appliances?
A modulated infrared signal is used to transmit commands. A digital code sent by the remote control in the form of a series of “flashes”. Each “flash” contains a sequence of short pulses, the duration and frequency of which depends on which button is pressed.The signal sent by the remote control is received by a photodetector built inside the device.
Before you begin troubleshooting the remote control system, you need to decide where the fault is located - in the remote control or in the device itself. Since the remote control emitter operates in the infrared spectrum of light waves, invisible to the human eye, checking its performance without special instruments or devices, at first glance, seems to be very difficult...
Simple and reliable check the remote control possible using photo and video cameras. You just need to point the remote control at the lens of the photo or video camera and press one of the buttons on the remote control. On the camera display you should see a glowing infrared LED of the operating remote control in the visible spectrum of light waves. See photo at the beginning of the article, No. 1 button on the remote control is not pressed, No. 2 one of the buttons is pressed, as evidenced by a glowing emitter (infrared LED).
If, after pressing the button on the remote control, you do not see any changes on the camera display, then this indicates a malfunction, to eliminate which you should first replace the batteries.
An elegant and simple way to check the functionality of your TV remote without an oscilloscope.
The situation is trivial - they came to repair the TV, but the remote control doesn’t work. In principle, everything can be solved; we open the remote control and use a tester to make sure that there is a signal at the input of the emitting diode. But it’s not a fact that he himself didn’t die; in general, without an oscilloscope, we begin to experience obvious discomfort, and who in their right mind would carry it on the line. Although its presence when checking the remote control implies some clearly unnecessary body movements - a photodiode suspended from the oscilloscope, through which all this is checked.
There is a more elegant solution - an indicator for the presence of a signal from the remote control. This is a small pocket that can be easily built into a Chinese switch and allows you to spend a minimum of time during such repairs.
One thing, not all photo receivers operate on reduced power; supply imported ones with the normalized 5 volts. Although there is a way out by using a domestic one, free from this drawback. Installed in the latest produced MSN405.
It works great with a 2.5 volt power supply, which is just right for a switchman with a pair of one and a half volt batteries. The operating range with this power supply is 20 cm, but this is quite enough to check the remote control. With a source of 5 volts, of course, you can install any three-legged photo receiver, the range will be the same as that of a TV.
And here is the circuit itself, built on the widely used 555 microcircuit, taken from the program for calculating elements for the 555 timer.
As load R2, you can optionally use a piezo tweeter with or without a built-in generator, an LED with a current limiting resistance, or all together.
Transistors, I suspect, can be any with the appropriate structure and gain. When supplying power to the device at five volts, it is mandatory to install an electrolyte of at least 330 μF on this bus; at three volts, if there is no excitation, then you can do without it.
Modern stationary household appliances, televisions, stereo systems, home theaters, air conditioners, etc. are controlled, in addition to the buttons on the device itself, using a remote control (RC). A faulty remote control makes the device ineffective and causes a lot of inconvenience to users, not to say that it turns life into a nightmare. In this article we will look at how to do it using a video camera, camera, built-in camera of a tablet, smartphone or other mobile device.
Just a little theory, in an accessible form.
How does remote control work in modern household appliances?
A modulated infrared signal is used to transmit commands. A digital code sent by the remote control in the form of a series of “flashes”. Each “flash” contains a sequence of short pulses, the duration and frequency of which depends on which button is pressed.The signal sent by the remote control is received by a photodetector built inside the device.
Before you begin troubleshooting the remote control system, you need to decide where the fault is located - in the remote control or in the device itself. Since the remote control emitter operates in the infrared spectrum of light waves, invisible to the human eye, checking its performance without special instruments or devices, at first glance, seems to be very difficult...
Simple and reliable check the remote control possible using photo and video cameras. You just need to point the remote control at the lens of the photo or video camera and press one of the buttons on the remote control. On the camera display you should see a glowing infrared LED of the operating remote control in the visible spectrum of light waves. See photo at the beginning of the article, No. 1 button on the remote control is not pressed, No. 2 one of the buttons is pressed, as evidenced by a glowing emitter (infrared LED).
If, after pressing the button on the remote control, you do not see any changes on the camera display, then this indicates a malfunction, to eliminate which you should first replace the batteries.
If any problem occurs, it is better not to rush to throw away the product, but to try to carry out repairs without the help of others. Moreover, of course, it is not always possible to look for a high-quality remote control of a unique model on sale.
Quite often, remote control repair depends on the type of breakdown, or more precisely on the severity of the fault. In any case, no matter what the malfunction is, it can cause a lot of problems. But if you know the types of breakdowns, then of course they can be easily removed.
The remote control fell
Due to frequent falls of the device, quite severe damage can occur, the repair of which will become difficult. This is due to the fact that the connections in the solder joints on the circuit are often broken. If the batteries are OK, then the remote control ( electronic device for monitoring and controlling the operation of devices, processes and signals) Of course, you can check it with a camera or cell phone. Since it has an infrared emitter installed that can detect any interference. This procedure should be carried out according to the following scheme:
1. First of all, turn on the cell phone camera.
3. We bring the camera quite close and press some button on the remote control. If a special signal comes from the remote control, a blue dot should appear on the phone screen.
This is how the functionality of the TV remote control is checked; if the remote control is working, then try to unplug (the plug) from the power supply and connect it to the network again. Then turn on your own TV using the remote control. Sometimes it works and the reason is not the remote control at all.
