Video intercom system does not display the image of the reasons and solutions

Video intercom system does not display the image of the reasons and solutions: home visual intercom system doorbell no picture factors may have the following conditions, this article Xiaobian for us to introduce the next doorphone for home video intercom system No picture factors and solutions.

Fault 1 , the video intercom system extension light no picture may be factors: the whole building visual extension no picture, check the door video output V to a video distributor, the input terminal connection is not a positive and negative connection, video Is the distributor connected to the power supply and note that the input and output ports cannot be connected incorrectly?

Solution: Connect the video distributor to the power supply to accurately connect the input and output video cables.

Fault 2, visual intercom system doorbell picture snow point may be factors: check is not wrong to 18V visual power to the door machine, causing the camera to overheat;

Treatment method: accurate wiring.

Faults 3, visual intercom system doorbell picture dissatisfaction screen, there are dark corners may be factors: check to the extension of the visual power is not for the 18+/-1V;

Solution: The extension-to-power interval is not too far, and the power cord is not standardized.

Faults 4, visual intercom system doorbell picture dissatisfaction screen, there are dark corners may be a factor: the weak picture signal causes the line to be out of sync;

Solution: Check the video line is not a good touch, the transmission interval is not too far, the line is not standardized.

Problems 5, visual intercom system doorbell picture is blurred, dim may be factors: the signal is too weak, impedance mismatch or poor contrast;

Treatment methods: a) Conditioning extension negative 75 ohm impedance switch.

b) Contrast, poor brightness, adjustable trimpot to improve the picture.

Keywords: video intercom system video intercom video intercom system solution