Talking about the troubleshooting of hardware failure of video security system First, the system troubleshooting According to the basic topology of the system, any problem in any link will result in the loss of surveillance images. Therefore, you should first check whether the hardware of the camera, intermediate cable, and monitor itself has failed. 1. Check the camera The imaging and focusing quality of the camera is its key indicator. The simplest method of inspection is to use a small TV and observe the video output of the camera. If the image satisfies the requirement, it proves that the problem is not in the camera. In addition, the video surveillance camera is generally integrated with the PTZ and has a zoom function. Checking the function requires a PTZ (Pan/Tilt/Zoom) test, which requires special instructions to support the corresponding motion protocol. Obviously, if the PTZ test is performed in the field, a laptop computer is required. 2. Communication cable The on-site video signal and PTZ control signal are transmitted to the monitoring center equipment through corresponding cables, or transmitted to the on-site camera in the opposite direction. If there is no problem with the camera on site, the next step is to troubleshoot the cable. The easiest way is to measure the continuity of the signal line. An ordinary multimeter can accomplish this task. At the same time, with a multimeter, you can also check whether the power supply of the camera meets the requirements. Now, the monitoring system is changing from the analog signal system to the digital signal system. Both the video signal and the control signal will be transmitted on the data cable. In this case, the transmission cable must meet the Ethernet physical layer termination requirements, and not just meet the conduction can achieve normal communication. Therefore, when the monitoring digital monitoring system also need to check the line instrument. 3. Monitor terminal check If there is no abnormality in the first two links and there are still no images on the monitor, you need to check whether the problem is on the monitor itself. Accessing standard video color bar signals is the quickest way to check monitor performance. It should be noted that the video signal is divided into the NTSC system and the PAL system. If the monitor does not have an automatic identification function, it must be set manually to match the system or signal generator signal. Dc Motor Fan,Smart Ceiling Fans,Ac Motor Fan Ceiling,Dc And Ac Motor Ceiling Fan Jiangmen MagicPower Electrical Appliances Co.,Ltd. , http://www.magicpowerfans.com