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Here are a few ways to check problems of the remote.

If the remote control is used for a long time, it will malfunction. The general principle is: if the power of the remote control is normal, only a certain button does not respond. That is, only the button is faulty. At this time, the remote control button housing can be removed, and the circuit board can be cleaned with a cotton swab and anhydrous alcohol. If you press any button, nothing happens. Most of them are due to crystal damage or decoupling capacitance of the power supply. The following methods are recommended to detect the remote controller with problems.

 

Method 1: Use the medium wave radio detection remote control to bring the normal remote control launch window close to the working radio. When any button is pressed, the radio will make a “beep” sound. However, there is a point that when the infrared emitting diode inside the remote control breaks down or loses the infrared emission capability, and the internal oscillation circuit continues to work, the middle wave radio detects that the remote controller still emits a "beep" sound. This method is not accurate.

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Method 2: Using the remote control with a red light-emitting tube, the remote control has a red light-emitting tube, which can be used to judge. When the button is pressed, the red LED flashes. Description This key message has been sent. This method is not 100% accurate, and it is also sufficient when the launch tube is defective.

 

Method 3: Using the mouse to detect the remote control Now the computer is using an optical mouse. When the computer is working properly, move its mouse cursor to the middle of the screen. Then turn the bottom of the mouse up, and the red light will turn dark. The normal remote control launch window will be read at the bottom of the mouse when any button is pressed. The red light on the bottom of the mouse increases the brightness. When the remote control is shaken slightly, the cursor in the display screen will also shake with the remote control, indicating that the remote control is working properly. This method is highly accurate but inconvenient.

 

Method 4: Using the infrared receiving diode to detect the remote controller directly use the infrared receiving tube to detect the remote controller, and use the pointer multimeter to observe the change of the pointer or the digital multimeter electrical blocking to observe the change of the number. First, the pointer type multimeter is set to R×1k gear (MF47 type is taken as an example), the red meter pen is connected to the positive pole of the infrared receiving diode, and the black meter pen is connected to the negative pole of the infrared receiving diode. At this time, the pointer table will have a certain resistance value. Use the remote control to illuminate the infrared receiving diode, which is about 1cm apart. Press any button if the remote is normal. The pointer is deflected and has a jitter (a resistance of around 70 kΩ). The remote control can emit infrared pulses.

 

 

If a digital multimeter is used, the table is set to R × 2k, the red pen is connected to the negative pole of the infrared receiving diode, and the black pen is connected to the positive pole of the infrared receiving diode. at this time. Both the pointer table and the digital table will have a certain resistance value. Use the remote control's emission window to align the infrared receiver diode. Pressing any button will change if the resistance value (the resistance increases), which means the remote control is working properly. This method is simple and intuitive. High accuracy. But it is more troublesome.

 

Method 5: Using a pointer multimeter to detect the remote control first open the remote control housing. The multimeter is placed on both ends of the infrared emission tube on the DC1V block direct measurement circuit board. The red meter pen is connected to the anode of the infrared emission tube. The black meter pen is connected to the negative pole of the infrared emission tube. When any button is pressed, if the hands are deflected and shaken, the circuit can start to vibrate and the remote control basically works normally. However, it cannot be judged whether the infrared emitting diode inside the remote controller is good. But you need to open the remote control case.

 

Method 6: Using a mobile phone to detect the remote control using a mobile phone with a camera function, in the photographing state, align the mobile phone with the launch window of the remote control (the best distance is about 200 mm). then. Press each button on the remote control. At this time, on the screen of the mobile phone, there is visible light from the remote control launching tube (emission window) (this kind of light is infrared light that is invisible to the naked eye). It glows like a miniature small flashlight. If the remote control is detected when the ambient light is dim, the effect is more obvious. This method is simple, intuitive, reliable and accurate.

 

These methods are described above. Applicable to the detection of various remote controls, friends who are interested in the condition may wish to try. Things like Method 2, Method 3, and Method 6 are simpler than others. No professional tools are needed. Basically, you can try them out.

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