1, the power supply equipment failure caused by incorrect. Improper power roughly There are several possibilities: the power supply line or supply voltage is not correct, or insufficient power supply line of the diameter of a road is not enough, blood pressure is too large, etc.), the transmission line power system short-circuit, open circuit, instantaneous overpressure Wait. Especially in the case of error or momentary power due to overvoltage damage the equipment into have occurred. Thus, in the system debugging, before power must be checked scrupulously and inspection, should never be taken lightly.
　　2, because some devices such as variable lens with three cameras and PTZ) is connected with a lot of pieces, if handled properly, especially in contact with the equipment line handled properly, there will be inter-circuit, short circuit, line poor insulation, as a result of mis-wiring damage to the equipment, performance degradation. In this case, should be analyzed calmly to prevent the phenomenon, it is judged on a number of lines is due to a problem with the line connection which has generated the kind of malfunction. This will narrow the scope of the problems. Of particular note is that due to the full range of PTZ camera movement, a long time, resulting in a drop connection, torn apart are common. Therefore, pay special attention to equipment connected to this situation should comply with the various lines of long-term operation requirements.
　　3, equipment or parts of quality problems. In theory, various equipment and parts quality problems are likely to occur. But experience point of view, is purely the product itself quality problems, occurred in the decoder, electric head, transmission components and other equipment. It is worth noting that some devices may not be used without problems from the overall sense of quality, but did not reach index on product specifications given on some technical indicators. Therefore, the product must be selected to make the necessary sampling. When indeed the product quality problems, the best way is to replace the product, rather than disassemble repair. In addition, the most common due to problems caused by improper adjustment of the equipment. For example, after adjusting the intercept of the camera is a very detailed and precise requirements of the work, if not carefully adjusted, will be out of focus or defocus occurs when the various operating three variable lens and other issues. In addition, some of the switches on the camera and adjust the position of the knob is correct, meets the technical requirements of the system, the decoder coding switches or other adjustable parts of the set is correct or not will directly affect the normal use of the device itself or affect the normal performance of the whole system ???
　　Problems connecting 4, equipment or parts) with equipment or parts) of an incorrect generated approximately occur in the following areas:
　　(1)Mismatch impedance.
　　(2) does not correspond to the communication interface or communication. This situation mostly occurs between the control panel and the decoder or control keyboard and other equipment with a communication control relationship, that is to say, the choice of control panel with a decoder or control keyboard and other manufacturers of the products is not a cause. So, for the host, decoders, control keyboard and should use the same manufacturers.
　　(3) drive capability is not enough or exceeds a predetermined number of devices connected. For example, some Quad with alarm inputs on its product description is given of the police probe, time-lapse VCR connected hosts and other systems connected into the system, if the police probe and then coupled to the Quad alarm input alarm signal when a probe will be necessary to drive the control panel, but also to drive Quad appear. In this case, often have insufficient driving capacity. Showed the phenomenon, Quad though can alarm, but the alarm signal input for weak and stable work station, resulting in an image that corresponds to the screen the way the camera an alarm signal on the monitor though instantly converted to full screen but lost keep her), leaving the image on the monitor is still not much before the alarm screen.