Digital Remote Infrared Forehead Human Body Temperature Thermometer with High Accuracy Probe, measuring distance from 10cm to 80cm
It is a new human temperature measurement thermometer related to COVID-19, no need handhold, no staff need. Full automatic, unmanned, no human to human contact, avoid close contact with infected people, safe and accurate.
Features:
Wall Mount Thermometer measure temperature, from a person`s forehead, wrist, High temperature Alarm, Automatically temperature scan
1, Completely non-contact, measuring distance 2-80cm
2, Alarm when temperature over 37.5℃
3, Fahrenheit and Celsius switchable
4, High temperature measurement accuracy, with accuracy tolerance: ±0.2 degrees.
5. Free conversion of temperature unit ℃/℉
6. Powered by DC 5V external power supply(include), or by 4*AAA batteries.
7. Two temperature measurement modes (people or object)
8. Wall mounted or desk placed
9. Fever Beeper
10. Infrared technology, 45s no operation, enters the standby mode; wake up when people approach.
Wall Mounted Infrared Thermometers Wall Mount Thermometers,Infrared thermometer,non-contact infrared thermometer,Body Thermometer,Automatic Infrared thermometer Axiswell Technology Co., Ltd , https://www.medhealthycare.com
First try the following four steps:
Step 1: Check the remote control battery
1. First, check whether the battery is in good contact with the remote control. Many times because the battery is loose or the contact is poor, the remote control is not working. Therefore, just remove the back cover and reinstall the battery to recover. 
2. To see if the remote control battery is dead. If it is not a problem, replace the battery with a new one. Try it out. Under normal circumstances, most remote controller malfunctions can be solved by replacing the battery.
Step 2: Check the accessibility between the remote control and TV 
The remote controller transmits signals by infrared rays. If there is an obstacle between the TV and the remote controller, the TV cannot be controlled. Therefore, check for obstructions between the TV and the remote control. If there are obstacles, you need to transpose it, and then try whether the remote control will work again.
Step 3: See if the remote control is aligned with the TV 
If the remote controller is not aligned with the TV position, press the key, because the TV can not receive the infrared command on the remote control, and can not control the TV, so you need to confirm whether the remote control is aligned with the appropriate part of the TV, a simple way Just bring the remote control to your TV, and then try to see if the remote is working.
Step 4: Check if the button rubber wears 
If there is no problem with the above-mentioned 123 points, the reason that the remote controller has a great failure may be that the remote control has a long time and the keys are frequently pressed, which causes the rubber on the keys to be worn more seriously. For this problem, you can open the lid of the remote control, cut off the aluminum foil on the long cigarette box, and ask for the same length and width as the button, and then apply a strong glue on the non-metal surface to stick the aluminum foil. Go to the button and cover it again. Under normal circumstances can also be resolved.
If the above four steps still cannot be solved, please read:
Fault television type: hid528sb.r
Fault phenomenon: tcl TV remote control failure analysis and repair:
The panel keys are normal, and the remote controller malfunctions. When operating the remote controller, carefully observe the raster line jitter. Measure the signal output pin of the receiver head only 2.5v. When the normal signal is about 5v, the receiver signal is divided into two outputs, all the way to the whole Within the machine control CPU, the other way to the polymerization of the cpu signal receiving end, try to break off to the polymerization of the cpu signal receiving end, remote control operation is normal, after measuring the aggregate within the cpu receive signal to the ground leakage. Hefei Branch provided
Fault TV type: dlp56r8
Symptoms: Do not start the analysis and repair:
After testing the 12V power supply voltage is low, the output voltage of other power supply boards is normal. When the l4 is disconnected, the 12V voltage returns to normal, and there is a short circuit in the post-suspected level. The 12V power supply is checked to the rear level, and the +9V short circuit is found after the u7. It was found that the breakdown of a 7.5V regulator tube installed on the 9V signal board to the ground was caused by the breakdown, and the cause of the breakdown of the regulator tube was checked. After the replacement of the regulator tube, the fault was completely solved. 
Failure model: LCD40A71-P
Symptoms: Remote control failure, press any remote control key, the performance of the volume increases.
Analysis and maintenance:
The problem may lie in the remote receiving board and the digital board. First replace the remote receiving board. The failure phenomenon remains. The problem can be confirmed in the digital board. The remote control input signal is sent to U3 after going through the 4 to Q33 of the CN23 socket. After detecting Q33 normal, at the same time measuring the pulse voltage change of B33 of the Q33 when pressing the remote controller, indicating that the remote control signal is sent to U3, and the resistance of the remote control input pin AB24 of the comparison U3 to the ground is normal. Then decided to replace U3 (FLI8532), after the replacement failure remains. Repairs are in trouble.
Recall that the short-circuit of a key pressed on a CRT TV is often caused by a malfunction of the remote control. Therefore, it is suspected that there is a problem with the input of the key. The key signal passes through the 5th pin of CN23 and enters the first pin of U46. The voltage measured on this foot is: 4V. The comparative measurement of the 5 pin voltage of the normal machine CN23 is: 3.3V. Then determine the scope of the problem: KEY signal into the digital board to U46. When the KEY signal is detected in the input line of the U46, it is found that the grounding resistance R108 is damaged and the voltage rises. The U46 receives the signal and judges that it is a volume increase signal and starts to work, causing the volume to increase.
The remote controller is on the TV, just like the human hand. If one day suddenly one's own hand cannot be moved, what would a person feel? Of course, TV is the same. People control the TV depends on the remote control, so we have to learn how to troubleshoot the remote control. Today, Xiao Bian took everyone to learn how TCL LCD TV remote control malfunctions.