Surveillance cameras are mainly divided into gun-type, hemi-spherical, and high-speed ball types, as well as analog surveillance and IP network monitoring. They are widely used in many security areas such as banks, transportation, and safe cities. How to repair the surveillance camera if something goes wrong? Here are some maintenance tips.
When choosing a surveillance camera, choose an ALC lens for outdoor or bright environments due to the limited range of ELC control. For some digital security cameras that do not want to transmit optical fiber, the signal should be enhanced because of the relatively long transmission distance. The way to enhance the signal can be done by adding something like a repeater, receiving the transmitter's signal in the middle of the transmitter and receiver, and sending it again to the receiver. Or use differential signaling. If the distance from the camera is not as far as 10 to 20 meters, a follower can be used at high speed. For example, the AD8052, SGM8052 drive capability is 100mA.
When the surveillance camera fails, how should the camera be repaired?
1. If the surveillance camera has no image. Need to check whether the power is connected, the power supply voltage meets the requirements (power error: DC12V+10%AC24V + 5%); Check BNC head or video cable is in good contact; look at the lens aperture is open automatically; check the video or DC drive Whether the automatic iris lens control line is short-circuited to the ground; check whether the video leaks causes the video of the CCD board to burn out all the way.
2, the image quality is not good should check: whether the lens is fingerprint or dirty; aperture is adjusted well; poor video cable contact; electronic shutter or white balance settings are problems; whether the transmission distance is too far; voltage is normal; nearby there is Source of interference; whether the board's CCD is not flat; check whether the lens is a C-type interface or a CS-type interface. If the C-type interface must be connected with a ring, if it is a CS-type interface, remove the ring.
3. The image is distorted or geometrically distorted: Check if the used optical lens is abnormal; if the output impedance switch of the monitor is set to 75 Euro, check whether the impedance of the video connection cable used is 75 Euro.
4, like a white and foggy: Check whether there is water mist inside the body; check whether the lens cover close to the glass; check whether the body is equipped with a lens cover; check whether there is water fog inside the CCD; check the machine's electronic shutter is Open (turn it off if it is open).
5, voltage detection method: used to detect the voltage of the key points in the circuit to determine the point of failure.
6, the disconnection method: When the circuit short circuit or current is too large, use this method to reduce the fault range.
7, resistance detection method: used to determine the quality of a certain part of the circuit.
8, current detection method: By observing the current value to determine the fault.
9. Touch method: Open the case and touch each component (chip) by hand to see if it is overheated or exceeds normal temperature. That is, the hand cannot stay on the component, and it will feel abnormal heat and judge the fault point.
Surveillance cameras have been widely used in life and work. In the majority of users of the application and procurement, if the camera is bad you can try to use the above techniques to repair the machine. Of course, in addition to maintenance accidents, daily maintenance work is also very important.
When choosing a surveillance camera, choose an ALC lens for outdoor or bright environments due to the limited range of ELC control. For some digital security cameras that do not want to transmit optical fiber, the signal should be enhanced because of the relatively long transmission distance. The way to enhance the signal can be done by adding something like a repeater, receiving the transmitter's signal in the middle of the transmitter and receiver, and sending it again to the receiver. Or use differential signaling. If the distance from the camera is not as far as 10 to 20 meters, a follower can be used at high speed. For example, the AD8052, SGM8052 drive capability is 100mA.
When the surveillance camera fails, how should the camera be repaired?
1. If the surveillance camera has no image. Need to check whether the power is connected, the power supply voltage meets the requirements (power error: DC12V+10%AC24V + 5%); Check BNC head or video cable is in good contact; look at the lens aperture is open automatically; check the video or DC drive Whether the automatic iris lens control line is short-circuited to the ground; check whether the video leaks causes the video of the CCD board to burn out all the way.
2, the image quality is not good should check: whether the lens is fingerprint or dirty; aperture is adjusted well; poor video cable contact; electronic shutter or white balance settings are problems; whether the transmission distance is too far; voltage is normal; nearby there is Source of interference; whether the board's CCD is not flat; check whether the lens is a C-type interface or a CS-type interface. If the C-type interface must be connected with a ring, if it is a CS-type interface, remove the ring.
3. The image is distorted or geometrically distorted: Check if the used optical lens is abnormal; if the output impedance switch of the monitor is set to 75 Euro, check whether the impedance of the video connection cable used is 75 Euro.
4, like a white and foggy: Check whether there is water mist inside the body; check whether the lens cover close to the glass; check whether the body is equipped with a lens cover; check whether there is water fog inside the CCD; check the machine's electronic shutter is Open (turn it off if it is open).
5, voltage detection method: used to detect the voltage of the key points in the circuit to determine the point of failure.
6, the disconnection method: When the circuit short circuit or current is too large, use this method to reduce the fault range.
7, resistance detection method: used to determine the quality of a certain part of the circuit.
8, current detection method: By observing the current value to determine the fault.
9. Touch method: Open the case and touch each component (chip) by hand to see if it is overheated or exceeds normal temperature. That is, the hand cannot stay on the component, and it will feel abnormal heat and judge the fault point.
Surveillance cameras have been widely used in life and work. In the majority of users of the application and procurement, if the camera is bad you can try to use the above techniques to repair the machine. Of course, in addition to maintenance accidents, daily maintenance work is also very important.
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