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What's wrong with webcam without image?
2021-05-17 10:42:30

Do you know why there is no image on the webcam? Many friends have this problem after using the webcam for a period of time. Let's see what's going on!


1. The power supply of the webcam is insufficient

The power of switching power supply itself is not enough, which leads to the overheating of switching power supply, resulting in thermal protection. Check whether the power supply has temperature on site. If it is cold, the power supply will crash. The solution is to replace the power supply

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2. The power supply voltage of the webcam is not enough

If the image of the camera flickers, the voltage of the power supply is not enough. The camera indicates that the power supply is 12V / 2a, and the 12V / 1a is likely to flicker, because the power supply is insufficient and needs to be replaced.


3. The network camera has its own fault,

If only one analog camera has this fault, the internal program of the analog camera may crash and recover after power failure and restart, which is mainly caused by poor reset circuit


4. Reverse connection of lines in engineering construction

Too thin wire leads to large voltage drop, and the analog camera cannot be started. The solution is to standardize the construction and measure the input voltage and current of the camera with a multimeter.


5. The transmission line has power supply

If the video transmission line is connected with alternating current, it will lead to the charging of the electrolytic capacitor inside the monitor camera head and distributor, thus blocking the video signal output. I have tested this in the laboratory and found this problem in several sites. Test method: measure the voltage of video cable with multimeter. Solution: find the power connection place, the internal isolation function is to prevent this phenomenon, and the maximum voltage can be 220 V on the video circuit, and the equipment will not be transmitted to the monitoring camera or the main control room when it works normally.

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