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Common faults and solutions of surveillance cameras

Date:2017-01-12 Hits:684
Common faults and solutions of surveillance cameras


1, infrared hemisphere machine series night illumination images, white or bright white iris phenomenon of the phenomenon is caused by improper assembly of the machine assembly, photosensitive device (photosensitive resistance) from the hemisphere too far distance will lead to start the lamp by the incomplete machine at night illumination difference image; white or bright white halo phenomenon is mainly caused by infrared the infrared luminescent tube through the refraction lens to cover the ball due to solve this problem is to avoid light refraction to the lens surface, usually used for isolation sponge ring lens and infrared light, in the assembly will cover the ball close to the sponge ring 

2, day night vision infrared waterproof camera images of normal white, this phenomenon by night the machine environment reflection or on a very small scale space, caused by infrared reflection, to solve this phenomenon should be firstly determined If there is a reflection of the environment, as far as possible to improve the use of the environment, then check the effective infrared distance and the actual use of the machine if a long distance is the distance of the infrared machine; in a very small space to use for infrared light is too strong to cause the machine white image. 

3, no image first check the external power supply output voltage polarity is correct, whether meet the requirements (power error: DC12V + 10%, AC24V + 5%), then check the video connection is good contact; if the manual aperture lens to check whether to open the aperture, auto iris lens to adjust LEVEL potentiometer to aperture in proper position. Auto iris lens double toggle development settings (two drivers): DC driver /VIDEO driver, two different drivers have different dial, start automatically at the aperture of the lens, the code must comply with the corresponding driver