Monitoring system failure solution
1. Incorrect equipment caused by power failure. Incorrect power supply may be as follows: The power supply line or power supply voltage is incorrect, the power is not enough (or the line diameter of a certain power supply line is not enough, the voltage drop is too large, etc.), the transmission line of the power supply system has a short circuit, open circuit, and instantaneous Pressure and so on. In particular, equipment damage due to power supply errors or momentary overvoltages occurs. Therefore, in the commissioning of the system, before the power supply, it must be carefully checked and checked carefully and must not be taken lightly.
2. Since there are many links between certain devices (such as cameras with three variable lenses and pan/tilts), if the handling is not good, especially if the lines connected to the device are not handled well, there will be open circuit, short circuit and line. Poor insulation, incorrect wiring, etc. result in equipment damage and performance degradation. In this case, the analysis should be made calmly based on the phenomenon of failure, and it should be determined on which of the lines that the connection is faulty. This will reduce the scope of the problem. It is particularly worth pointing out that cameras with pan-tilt heads have a long time due to all-round movements, resulting in disconnection and breakage of connections that are common. Therefore, special attention should be paid to the connection of equipment and various lines in this case to meet the requirements of long-term operation.
3. The quality of equipment or components itself. In theory, quality problems may occur on various equipment and components. However, from an experience point of view, the pure quality of the product itself occurs in decoders, electric gimbals, and transmission components. It is worth pointing out that the quality of some devices may not appear to be unusable due to their overall quality. However, some technical indicators do not meet the specifications given in the product specifications. Therefore, the necessary sample testing must be performed on the selected product. When it is indeed a product quality problem, the best way is to replace the product and not to dismantle and repair it. In addition, the most common problems arise from improper adjustment of the equipment. For example, the adjustment of the intercept after the camera is a very detailed and precise task. If the adjustment is not carefully performed, problems such as poor focusing or defocusing during various operations of the three variable lenses may occur. In addition, whether the positions of some switches and adjusting knobs on the camera are correct, whether they meet the technical requirements of the system, or the correctness of the encoder coding switch or other adjustable site settings directly affect the normal use of the device itself or affect the normal performance of the entire system. .
4. Problems arising from incorrect connection between equipment (or components) and equipment (or components) will generally occur in the following areas:
(1) Impedance mismatch.
(2) Communication interface or communication method does not correspond. This situation mostly occurs between the control host and a device such as a decoder or a control keyboard that has a communication control relationship. That is, the selected control host and decoder or the control keyboard are not caused by a manufacturer's product. Therefore, the same manufacturer's products should be used for the host, the decoder, and the control keyboard.
(3) The drive capacity is insufficient or exceeds the specified number of device connections. For example, some picture splitters have an alarm input interface and a system host connected to alarm probes, long time delay recorders, etc. is provided in its product specification. If an alarm probe is connected to the screen splitter At the input, the probe's alarm signal will drive both the control panel and the screen divider. In this case, the problem of insufficient driving capacity often arises. The phenomenon shown is that although the screen divider can alarm, but the input alarm signal is weak and the workman is stable, resulting in the camera screen corresponding to the occurrence of the alarm signal is instantaneously converted to a full-screen screen on the monitor. However, it is lost (cannot hold), and the image on the monitor is still the multi-image before no alarm.
To solve the above problems, the first method is to connect the alarm probe signal to the picture splitter or the video switching host through a dedicated alarm interface box. The second is that in the absence of an alarm interface box, it can be designed and processed signal expansion equipment or drive equipment. The problems mentioned above also appear in the output and distribution of video signals.
Public Broadcasting System Frequently Asked Questions 1. Amplifier output overload. A. Check if the circuit is short-circuited. B. Check if the speaker impedance is consistent and whether there is a short circuit. C. Check the input voltage is normal.
Alarm System FAQs 1. The alarm signal cannot be disarmed. A. The tail resistor is not connected or connected incorrectly. B. The input line is in a short circuit (open circuit) state. C. The probe is working properly.
2. No alarm. A. Is it armed? B. Arming programming is correct. C. Can you hear the sound of the electrical operation in the probe or alarm console?
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