What is Car Ethernet Vehicle Router,Vehicle 4G Router,Vehicle 4G Wireless Router,Vehicle Wifi Router Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommiot.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.
Car Ethernet is a new local area network technology that uses Ethernet to connect the electronic unit in the car. Unlike traditional Ethernet, which uses 4 unshielded twisted pair cables, car Ethernet can achieve a transmission rate of 100Mbit/s or even 1Gbit/s on a single pair of unshielded twisted pair cables. At the same time, it also meets the requirements of the automotive industry for high reliability, low electromagnetic radiation, low power consumption, bandwidth allocation, low latency and synchronous real-time. The physical layer of on-board Ethernet uses BroadRReach technology, and BroadR-Reach's physical layer (PHY) technology has been standardized by the One-pair Ethernet Alliance (OPEN). Therefore, it is sometimes called Broad RReach (BRR) or OABR (Open Alliance BroadR-Reach). The MAC layer of vehicle Ethernet adopts the IEEE 802.3 interface standard and seamlessly supports widely used high-level network protocols (such as TCP/IP) without any adaptation.
On-board Ethernet protocol architecture
Vehicle-borne Ethernet and its supported upper-layer protocol architecture are shown in Figure 1. Vehicle-borne Ethernet mainly involves OSI layer 1 and Layer 2 technologies, while vehicle-borne Ethernet also supports AVB, TCP/IP, DOIP, SOME/IP and other protocols or application forms.
On-board Ethernet framework
Among them, AVB is an extension of traditional Ethernet functions, which enhances the real-time performance of traditional Ethernet audio and video transmission by adding precise clock synchronization, bandwidth reservation and other protocols, and is a network audio and video real-time transmission technology with great development potential. SOME/IP (Scalable Service-Oriented MiddlewarE on IP) specifies the video communication interface requirements for vehicle camera applications, which can be applied to the field of vehicle cameras, and realizes the mode control of driver assistance cameras through apis.
As an extension of AVB protocol, Time-Sensitive Networking (TSN) introduces related technologies of time-triggered Ethernet, which can efficiently realize the transmission of automotive control information. In addition, the on-board Ethernet of the 1Gbit communication standard also supports Power Over Ethernet (POE) function and Energy-Efficient Ethernet (EEE) function. The POE function provides power for connected terminal devices while transmitting data through twisted pair cables, eliminating the need to connect external power cables to terminals and reducing the complexity of power supply.
On-board Ethernet standardization
In terms of in-vehicle Ethernet standardization, the IEEE802.3 and IEEE802.1 working groups, AUTOSAR, the OPEN Alliance and the AVnu Alliance have played a major role in promoting it.
The IEEE802.3 local area network standard represents the mainstream Ethernet standard in the industry, and the on-board Ethernet technology is developed on the basis of IEEE802.3, so the IEEE is currently the most important international standardization body for on-board Ethernet. In order to meet the requirements of the car, it involves the development of a number of new specifications and the revision of the original specifications within the two working groups of IEEE802 and 802.1, including PHY specifications, AVB specifications, and single-wire to data line power supply. In addition, AVB related to AV transmission, timing synchronization and other specifications also need to be standardized by other technical committees of IEEE, such as IEEE1722 and IEEE1588.
OPEN Alliance
The OPEN Industry Alliance was launched in November 2011 by Broadcom, NXP, and BMW to promote the application of Ethernet-based technology standards to in-car connectivity. The main standardization goal is to develop a 100Mbit/s BroadR-R physical layer standard and develop OPEN interoperability requirements.
AUTOSAR
AUTOSAR is a consortium of automotive manufacturers, suppliers, and tool developers that aims to develop an open, standardized automotive software architecture, and the AUTOSAR specification already includes the automotive TCP/UDP/IP protocol stack.
AVnu
The AVnu Alliance was formed by Broadcom in collaboration with Cisco, Harman and Intel to promote the IEEE 802.1 AVB standard and the Time Synchronization Network (TSN) standard, establish a certification system, and address important technical and performance issues such as precise timing, real-time synchronization, bandwidth reservation, and traffic shaping.
TCL LCD TV remote control failure how to do [overhaul scheme]
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.