1. Failure of the gimbal. A pan/tilt will not operate quickly or at all after it is used. It is a common fault of the PTZ. The appearance of this situation, apart from the factors of product quality, is generally caused by the following reasons:
(1) Only the pan/tilt head mounted on the camera is allowed to use the hoisting method. In this case, the hoisting method leads to an increase in the operational load of the pan/tilt. Therefore, the use of the hoisting method will soon lead to damage to the drive mechanism of the pan/tilt, or even burn the motor.
(2) The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
(3) The outdoor pan/tilt head is faulty or even damaged due to bad ambient temperature, excessively low temperature, waterproof, and frost protection measures.
2. When the distance is too far, the camera (including the lens) and the pan/tilt cannot be controlled by the decoder through the operation keyboard. This is mainly because when the distance is too far, the attenuation of the control signal is too great and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
3. The image contrast of the monitor is too small and the image is light. This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
4. The sharpness of the image is not high, the detail is lost, and when the color is serious, color signal loss or color saturation is too small. This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. This situation may be due to the fact that the transmission distance is too long, and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
5. Hue distortion. This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
6. The operating keyboard is malfunctioning. This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. Keyboard operation instructions, generally have to solve the "crash" method, such as "the whole reset" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
7. The host does not clean the image. This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the main mechanism matrix switch and the requirement for isolation between images.
If a radio frequency transmission system is used, it may also be caused by the system's cross-talk modulation and excessive modulation.
A large-scale television monitoring system that operates in conjunction with burglar alarms is a high-tech and complex system. Although various kinds of failure phenomena may occur, as long as the quality of selected equipment and equipment is properly shut down and construction is strictly conducted in accordance with standards and specifications, generally no major problems will arise. Even if it appears, as long as you calmly analyze and think, and don't blindly dismantle, you will solve the problem faster.
Fourth, other;
decoder
1. Turn on the power and the power indicator is off.
a. Check if power is supplied to the terminal.
b. Check the power fuse for damage.
2. Electricity is burned
a. Check if there is something wrong with the common terminal (com) of the terminal block.
b. Check whether the PTZ output voltage is selected correctly.
3. Power light is on but not controllable
a. Whether the signal line is connected correctly.
b. The control light blinks.
c. Is it correctly coded?
4. Control does not work
a. Check the control code signal line.
b. The same signal line control line is too long.
c. The same signal line string (and) is connected to too many decoders.
Camera
1. No image output
a. Check if the power supply is connected and the power supply voltage is sufficient.
b. Check whether the BNC connector or video cable is in poor contact. If the power supply is normal, use a universal meter to test whether the output cable is on or off.
c. Whether the lens aperture is open or not, video or DC driven auto iris lens control wire is connected.
d. In the above problems still can not be found, it is best to find a good camera replacement test in the nearest place to determine the way to check, this is conducive to quickly identify the reasons.
2. Bad image quality
a. Whether the lens is fingerprinted or dirty, and if the aperture is adjusted properly.
b. Poor contact of the video cable, especially the contact point between the two BNC heads and the host.
c. There is no problem with the electronic shutter or white balance settings.
d. The transmission distance is too far and the signal is insufficient.
e. The voltage is normal.
f. Is there a source of interference nearby?
g. When installing in an elevator, ensure that the elevator is insulated from interference.
h. Is the CS interface connected?
Splitter
1. The power supply is not working properly, causing the splitter to lock up. Replace the power supply.
2. Bad access to the BNC video cable causes picture jumps.
3. Due to the mis-programming, the splitter was confused and set up again.
4. The wrong playback port was used during recording, and playback was not possible.
5. The use of simplex dividers can only be recorded and cannot be played back. Duplex, half-duplex job.
Old tape recorders (although they have been eliminated, but there are such systems in use, so talk about them)
1. Record half downtime.
a. The tape has been used too long and is too tight. Change the video tape.
b. The abnormal operation of the mains may not work. Install the regulator.
c. Excessive ambient temperature causes the recorder to overheat and stop.
2. Image beats with snowflakes
a. The head is dirty and wash the head.
b. The videotape is used for too long or is of poor quality. Change the video tape.
3. No image or no image playback
a. There is no bad contact on the BNC connector.
b. Is there a video input?
c. Always use the splitter for playback when connecting to the splitter.
Old monitor
1. No light
a. Is the power supply normal?
b. Some monitors are triggered by the video signal and check if the BNC is loose.
2. Image has snowflakes
a. Poor video cable contact.
b. The video signal is too weak.
c. Video signal interference.
3. The screen beats and there are interfering bars or bars.
a. Check directly with the camera. If there is no interference, the video introduces interference.
b. Whether the display format is selected correctly, such as PAL.
c. Whether the impedance file is selected.
d. Adjust the line and field frequency knobs.
PTZ
1. Is foreign matter stuck during installation?
2. The correct connection with the decoder, the most important thing is to connect to the public side, the COM side.
3. When installing, pay attention to sorting all the cables to prevent the circuit board from short circuiting due to friction when the pan/tilt rotates.
Various types of controllers, main control keyboard
1. This kind of equipment must be seriously optimistic about the instructions, to ensure that the wiring is correct; programming is correct;
The transmission rate is correct; the code transmission method is correct. As long as you can do this, it will be normal
jobs.
2. A. For sub-control keyboards, master keyboard programming authorization is also required for use.
B. Some sub-control keyboards are also stipulated that the display of 1# monitor cannot be seen and must be set to
The monitor should be used.
matrix
1. Whether programming is correct or not.
a. When using the sub-control keyboard, whether the programming and authorization of the monitor is programmed correctly.
b. Whether the alarm device is correctly connected when setting alarm monitoring and recording. Is programming reasonable
(Data conflict of related devices).
c. Connect an external controlled device. Such as fast ball, decoder, alarm equipment, pay attention to the instructions
The data port provided. Connect and program correctly.
2. Matrix failure
a. No display at power on, please check the fuse.
b. No more than 32-way matrix box boot, check the self-checking light-emitting diode work
No normal. If it is not normal, reinsert the board.
c. When there is no output on a certain path, the normal screen of one path can be replaced to see if it is a matrix problem.
It is other problem.
d. If the control fails, check whether the control port is connected to the control port.
Try a port.
Alarm System FAQs
1. The alarm signal cannot be disarmed.
a. The tail resistor is not connected or connected incorrectly.
b. The input line is in a short circuit (open circuit) state.
c. The probe is working properly.
2. No alarm
a. Is there arming?
b. Arming programming is correct.
c. Can you hear the electrical operation sound in the probe or alarm console?
Public address system FAQs
Amplifier output overload
a. Check if the circuit is short-circuited.
b. Check for consistent speaker impedance and short circuit.
c. Check the input voltage is normal.
(1) Only the pan/tilt head mounted on the camera is allowed to use the hoisting method. In this case, the hoisting method leads to an increase in the operational load of the pan/tilt. Therefore, the use of the hoisting method will soon lead to damage to the drive mechanism of the pan/tilt, or even burn the motor.
(2) The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
(3) The outdoor pan/tilt head is faulty or even damaged due to bad ambient temperature, excessively low temperature, waterproof, and frost protection measures.
2. When the distance is too far, the camera (including the lens) and the pan/tilt cannot be controlled by the decoder through the operation keyboard. This is mainly because when the distance is too far, the attenuation of the control signal is too great and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
3. The image contrast of the monitor is too small and the image is light. This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
4. The sharpness of the image is not high, the detail is lost, and when the color is serious, color signal loss or color saturation is too small. This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. This situation may be due to the fact that the transmission distance is too long, and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
5. Hue distortion. This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
6. The operating keyboard is malfunctioning. This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. Keyboard operation instructions, generally have to solve the "crash" method, such as "the whole reset" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
7. The host does not clean the image. This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the main mechanism matrix switch and the requirement for isolation between images.
If a radio frequency transmission system is used, it may also be caused by the system's cross-talk modulation and excessive modulation.
A large-scale television monitoring system that operates in conjunction with burglar alarms is a high-tech and complex system. Although various kinds of failure phenomena may occur, as long as the quality of selected equipment and equipment is properly shut down and construction is strictly conducted in accordance with standards and specifications, generally no major problems will arise. Even if it appears, as long as you calmly analyze and think, and don't blindly dismantle, you will solve the problem faster.
Fourth, other;
decoder
1. Turn on the power and the power indicator is off.
a. Check if power is supplied to the terminal.
b. Check the power fuse for damage.
2. Electricity is burned
a. Check if there is something wrong with the common terminal (com) of the terminal block.
b. Check whether the PTZ output voltage is selected correctly.
3. Power light is on but not controllable
a. Whether the signal line is connected correctly.
b. The control light blinks.
c. Is it correctly coded?
4. Control does not work
a. Check the control code signal line.
b. The same signal line control line is too long.
c. The same signal line string (and) is connected to too many decoders.
Camera
1. No image output
a. Check if the power supply is connected and the power supply voltage is sufficient.
b. Check whether the BNC connector or video cable is in poor contact. If the power supply is normal, use a universal meter to test whether the output cable is on or off.
c. Whether the lens aperture is open or not, video or DC driven auto iris lens control wire is connected.
d. In the above problems still can not be found, it is best to find a good camera replacement test in the nearest place to determine the way to check, this is conducive to quickly identify the reasons.
2. Bad image quality
a. Whether the lens is fingerprinted or dirty, and if the aperture is adjusted properly.
b. Poor contact of the video cable, especially the contact point between the two BNC heads and the host.
c. There is no problem with the electronic shutter or white balance settings.
d. The transmission distance is too far and the signal is insufficient.
e. The voltage is normal.
f. Is there a source of interference nearby?
g. When installing in an elevator, ensure that the elevator is insulated from interference.
h. Is the CS interface connected?
Splitter
1. The power supply is not working properly, causing the splitter to lock up. Replace the power supply.
2. Bad access to the BNC video cable causes picture jumps.
3. Due to the mis-programming, the splitter was confused and set up again.
4. The wrong playback port was used during recording, and playback was not possible.
5. The use of simplex dividers can only be recorded and cannot be played back. Duplex, half-duplex job.
Old tape recorders (although they have been eliminated, but there are such systems in use, so talk about them)
1. Record half downtime.
a. The tape has been used too long and is too tight. Change the video tape.
b. The abnormal operation of the mains may not work. Install the regulator.
c. Excessive ambient temperature causes the recorder to overheat and stop.
2. Image beats with snowflakes
a. The head is dirty and wash the head.
b. The videotape is used for too long or is of poor quality. Change the video tape.
3. No image or no image playback
a. There is no bad contact on the BNC connector.
b. Is there a video input?
c. Always use the splitter for playback when connecting to the splitter.
Old monitor
1. No light
a. Is the power supply normal?
b. Some monitors are triggered by the video signal and check if the BNC is loose.
2. Image has snowflakes
a. Poor video cable contact.
b. The video signal is too weak.
c. Video signal interference.
3. The screen beats and there are interfering bars or bars.
a. Check directly with the camera. If there is no interference, the video introduces interference.
b. Whether the display format is selected correctly, such as PAL.
c. Whether the impedance file is selected.
d. Adjust the line and field frequency knobs.
PTZ
1. Is foreign matter stuck during installation?
2. The correct connection with the decoder, the most important thing is to connect to the public side, the COM side.
3. When installing, pay attention to sorting all the cables to prevent the circuit board from short circuiting due to friction when the pan/tilt rotates.
Various types of controllers, main control keyboard
1. This kind of equipment must be seriously optimistic about the instructions, to ensure that the wiring is correct; programming is correct;
The transmission rate is correct; the code transmission method is correct. As long as you can do this, it will be normal
jobs.
2. A. For sub-control keyboards, master keyboard programming authorization is also required for use.
B. Some sub-control keyboards are also stipulated that the display of 1# monitor cannot be seen and must be set to
The monitor should be used.
matrix
1. Whether programming is correct or not.
a. When using the sub-control keyboard, whether the programming and authorization of the monitor is programmed correctly.
b. Whether the alarm device is correctly connected when setting alarm monitoring and recording. Is programming reasonable
(Data conflict of related devices).
c. Connect an external controlled device. Such as fast ball, decoder, alarm equipment, pay attention to the instructions
The data port provided. Connect and program correctly.
2. Matrix failure
a. No display at power on, please check the fuse.
b. No more than 32-way matrix box boot, check the self-checking light-emitting diode work
No normal. If it is not normal, reinsert the board.
c. When there is no output on a certain path, the normal screen of one path can be replaced to see if it is a matrix problem.
It is other problem.
d. If the control fails, check whether the control port is connected to the control port.
Try a port.
Alarm System FAQs
1. The alarm signal cannot be disarmed.
a. The tail resistor is not connected or connected incorrectly.
b. The input line is in a short circuit (open circuit) state.
c. The probe is working properly.
2. No alarm
a. Is there arming?
b. Arming programming is correct.
c. Can you hear the electrical operation sound in the probe or alarm console?
Public address system FAQs
Amplifier output overload
a. Check if the circuit is short-circuited.
b. Check for consistent speaker impedance and short circuit.
c. Check the input voltage is normal.
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