The industry often encounters the phenomenon that there is no screen display based on the CCD board surveillance camera. I don't know if it is a power problem or a line problem or a problem with the camera itself. The analog camera manufacturer Kaining Video provides some common reasons and solutions for no picture. service.
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1. The power supply of the surveillance camera is insufficient: the power of the switching power supply is not enough, causing the switching power supply to overheat, thus causing thermal protection. Check the method to the field mode power supply for temperature. If the cold ice is the power supply, the solution is: replace the power supply;
2. The surveillance camera itself is faulty. Because only this camera of the analog camera manufacturer has this fault, the internal program of the surveillance camera manufacturer may crash, and the power is restored after the power is turned off, mainly due to the failure of the reset circuit. .
3. The transmission line has power supply: if it is connected with the AC power on the video transmission line, it will cause the monitoring camera head and the electrolytic capacitor inside the distributor to charge, which will block the video signal output. I have tested it in the laboratory and also several. The problem was discovered on the spot. Test method: Measure the video cable voltage with a multimeter. Solution: Find the power connection place or add my anti-jamming device. The internal isolation function is to prevent this phenomenon, and the maximum voltage can be 220 volts on the video circuit and the device works normally. Will be transmitted to the surveillance camera or the main control room.
4, the line is reversed during the construction, the wire is too thin, resulting in large pressure drop, the camera of the analog camera manufacturer can not be started, the solution is regular construction, the analog camera manufacturer prompts the multimeter to input the voltage and current.
Sometimes you will use several methods when you encounter this problem. It is best to slowly eliminate it. Carefully route the wiring, and select the camera and power supply for the regular analog camera manufacturer.
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