Common machine failure phenomena and solutions:
1. The machine will not start up. 1.1 Device failure caused by incorrect input power supply. There are several possibilities for incorrect power supply.
l The power supply line or power supply voltage is incorrect.
l The power is not enough (or the wire diameter of a certain power supply line is not enough, the pressure drop is too large, etc.).
l The system's transmission line is short circuited, open circuited, and instantaneous overvoltage.
In particular, equipment damage due to power supply errors or momentary overvoltages occurs from time to time, so measurements with a multimeter are required before power is supplied. However, sometimes, the power and live wires of the power supply will be reversed during the installation of the power supply. It is difficult to check and it needs to be noted by the engineering company.
1.2 Hard disk damage or hard disk problem 1.3 The machine power failure, you can replace a try; Or the power and the motherboard's terminals in the green line and black line shorted, with a multimeter to measure the power output 1.4 Front panel Problem: The power supply and The green line and the black line in the terminal block of the main board are short-circuited, and the hard disk recorder is started. If the operation is normal, the front panel or the connection line with the front panel can be basically determined. The connection between the front panel and the main board can be checked for looseness. Or whether the 89S52 microcontroller chip on the front panel is loose;
1.5 If it still cannot be started, it may be a hardware failure of the machine. You can send back the machine-initiated serial port information to the company's technical support department or send the machine back to the company for repair.
2. The machine will automatically restart or often crash 2.1 The input voltage is unstable or too low. It is recommended to install a power regulator or UPS.
2.2 The hard disk jumper is incorrect.
2.3 The hard disk has problems with bad sectors or hard disks. You can check the hard disk timeout or hard disk damage in the logbook.
2.4 If the power supply power is not enough to hang more hard disks, it will be restarted repeatedly. The removal of several startups is normal, or normal, and the backup is restarted. It is very likely that the power supply is critical. Change the power source or contact the office to modify the startup program.
2.5 Front-end video error restart. If the video cable is connected, but there is no front-end video, it will restart. The serial port outputs Warning[1]!!!Warning[1]. Detect front-end equipment.
2.6 Bad heat dissipation. Too much dust on the machine, the machine operating environment is too harsh.
2.7 electromagnetic interference. Many times the hard disk recorder crashes and restarts because of interference, from external power lines, inverter air conditioners, and even large equipment such as automobiles. Will cause the host to restart unexpectedly or frequent crashes.
2.8 Save Settings Restart.
2.9 Hardware failure, send the machine back to the company for repair.
3. Detection <br> <br> hard disk error may cause the machine can not start, repeatedly restart video playback or cause errors and other issues, and the amount of data on the DVR hard disk read and write in turn determines the hard disk damage can be significant. Hard disk detection method (for IDE hard disk):
3.1 First, check if the hard disk line is loose, try a better one.
3.2 Check the hard disk jumper. In actual use, the proportion of the customer's hard disk without jumper is always high. If the capacity of the hard disk is incorrect, it is likely that the jumper is incorrect.
3.3 If the hard disk becomes a read-only disk, it can be changed directly in the Advanced Options - Hard Disk Management.
3.4 Exchange an IDE oral exam.
3.5 See hard disk information in the hard disk recorder. If the information shows that no hard disk is detected, the hard disk is generally damaged.
3.6 If the hard disk is logically damaged, the file information is chaotic, and it can be resolved after the customer's consent is obtained. If it is physically damaged (it is very slow to open, the log outputs a lot of timeout information), you need to replace the hard disk.
4. Video output mode RW, GB, HB models TV and VGA can be output at the same time, other models TV output (BNC1) and VGA output can not be used as video output at the same time. However, VGA and BNC2 can be output together (Note: BNC2 is less effective).
5. Video image interference fringe 5.1 The front-end video caused by the construction cause is bad. You can use a direct-connect monitor or insert other normal channel tests. The monitor produces a large and chaotic large-area moiré, so that the image is completely destroyed and the image and synchronization signals cannot be formed. This fault is caused by the short circuit and disconnection of the core wire of the video cable and the shield network. Check the line.
5.2 The screen of the monitor generates several vertical bars with equal spacing. This is due to impedance mismatch caused by the characteristic impedance of the video transmission line not being 75 ohms. The solution usually depends on the "start resistance" or "terminal resistance
5.3 There are several fine streaks on the monitor screen. Most of this interference is due to strong interference sources near the system. Try to avoid or stay away from the radiation source. If it is impossible to avoid the radiation source, strengthen the shielding of the front end and the center equipment. Use the steel pipe for the transmission line and the pipeline and ground it well.
5.4 A black bar or white bar appears on the monitor screen and slowly scrolls. This phenomenon is mostly caused by the ground loop generated by the system and the introduction of 50-week power-frequency interference (AC interference). Strengthen grounding. Sometimes this phenomenon occurs due to poor performance (or partial damage) of the power supply of the camera or matrix switcher. Adding a UPS. Poor contact of the video cable (head) may also occur. Re-do the line.
5.5 Wood grain interference on the monitor. The quality of the video transmission line is not good, especially the shielding performance is poor (the shielding network is not a good quality copper network, or the shielding network is too thin to be shielded). At the same time, the line resistance of this type of video line is too large, which causes a large attenuation of the signal, which is also aggravating the problem. In addition, the characteristic impedance of this type of video line is not 75 ohms, which is also one of the causes of intentionality when the main parameter is out of specification.
6. Real-time image problems, such as video image color, serious brightness distortion, etc. 6.1N system and PAL system selection is not correct, the image will become black and white.
6.2 Impedance mismatch. If the video is connected to a monitor with a high impedance, there will be very bright images, jittery characters, or sometimes characters. Set the monitor switch to low impedance.
6.3 If the transmission distance is too far or the video transmission line is too attenuated, the picture will be faded or black and white. Join the video amplifier.
6.4 The phenomenon of color distortion that occurs easily 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.
6.5 Problems caused by improper camera installation and adjustment. For example, improper adjustment of the camera after the intercept, there will be problems such as poor focus or defocus in the three variable lens operations. If the camera brightness is too low (do not try to change the brightness of the hard disk recorder to compensate), you need to adjust the brightness of the camera to compensate. The brightness is too high, you can add a 100 ohm resistor or 100K ohm resistor grounding on the video core. Do not backlight when installing.
6.6 DVR color, brightness, and other settings are not correct. After reading the default value, set it again.
6.7 Hard Disk Video Recorder Connected to the TV Output Sometimes the edges are bent. Adjust the output height and XY values ​​in the advanced options. Turn the curved line out of the frame to make the image appear straight.
6.8 Machine hardware failure, send the machine back to the company for repair.
7. Among the video output display may be superimposed image <br> <br> not caused because the video output mode, please "long press", "↑" key number next to the button to switch the video output mode. When VGA and BNC2 are output together, BNC2 is less effective and there is no OSD overlay. When using the VGA switcher, there is often no output due to the output mode problem. In this case, the switch key switching mode or the program using the default VGA output is required.
1. The machine will not start up. 1.1 Device failure caused by incorrect input power supply. There are several possibilities for incorrect power supply.
l The power supply line or power supply voltage is incorrect.
l The power is not enough (or the wire diameter of a certain power supply line is not enough, the pressure drop is too large, etc.).
l The system's transmission line is short circuited, open circuited, and instantaneous overvoltage.
In particular, equipment damage due to power supply errors or momentary overvoltages occurs from time to time, so measurements with a multimeter are required before power is supplied. However, sometimes, the power and live wires of the power supply will be reversed during the installation of the power supply. It is difficult to check and it needs to be noted by the engineering company.
1.2 Hard disk damage or hard disk problem 1.3 The machine power failure, you can replace a try; Or the power and the motherboard's terminals in the green line and black line shorted, with a multimeter to measure the power output 1.4 Front panel Problem: The power supply and The green line and the black line in the terminal block of the main board are short-circuited, and the hard disk recorder is started. If the operation is normal, the front panel or the connection line with the front panel can be basically determined. The connection between the front panel and the main board can be checked for looseness. Or whether the 89S52 microcontroller chip on the front panel is loose;
1.5 If it still cannot be started, it may be a hardware failure of the machine. You can send back the machine-initiated serial port information to the company's technical support department or send the machine back to the company for repair.
2. The machine will automatically restart or often crash 2.1 The input voltage is unstable or too low. It is recommended to install a power regulator or UPS.
2.2 The hard disk jumper is incorrect.
2.3 The hard disk has problems with bad sectors or hard disks. You can check the hard disk timeout or hard disk damage in the logbook.
2.4 If the power supply power is not enough to hang more hard disks, it will be restarted repeatedly. The removal of several startups is normal, or normal, and the backup is restarted. It is very likely that the power supply is critical. Change the power source or contact the office to modify the startup program.
2.5 Front-end video error restart. If the video cable is connected, but there is no front-end video, it will restart. The serial port outputs Warning[1]!!!Warning[1]. Detect front-end equipment.
2.6 Bad heat dissipation. Too much dust on the machine, the machine operating environment is too harsh.
2.7 electromagnetic interference. Many times the hard disk recorder crashes and restarts because of interference, from external power lines, inverter air conditioners, and even large equipment such as automobiles. Will cause the host to restart unexpectedly or frequent crashes.
2.8 Save Settings Restart.
2.9 Hardware failure, send the machine back to the company for repair.
3. Detection <br> <br> hard disk error may cause the machine can not start, repeatedly restart video playback or cause errors and other issues, and the amount of data on the DVR hard disk read and write in turn determines the hard disk damage can be significant. Hard disk detection method (for IDE hard disk):
3.1 First, check if the hard disk line is loose, try a better one.
3.2 Check the hard disk jumper. In actual use, the proportion of the customer's hard disk without jumper is always high. If the capacity of the hard disk is incorrect, it is likely that the jumper is incorrect.
3.3 If the hard disk becomes a read-only disk, it can be changed directly in the Advanced Options - Hard Disk Management.
3.4 Exchange an IDE oral exam.
3.5 See hard disk information in the hard disk recorder. If the information shows that no hard disk is detected, the hard disk is generally damaged.
3.6 If the hard disk is logically damaged, the file information is chaotic, and it can be resolved after the customer's consent is obtained. If it is physically damaged (it is very slow to open, the log outputs a lot of timeout information), you need to replace the hard disk.
4. Video output mode RW, GB, HB models TV and VGA can be output at the same time, other models TV output (BNC1) and VGA output can not be used as video output at the same time. However, VGA and BNC2 can be output together (Note: BNC2 is less effective).
5. Video image interference fringe 5.1 The front-end video caused by the construction cause is bad. You can use a direct-connect monitor or insert other normal channel tests. The monitor produces a large and chaotic large-area moiré, so that the image is completely destroyed and the image and synchronization signals cannot be formed. This fault is caused by the short circuit and disconnection of the core wire of the video cable and the shield network. Check the line.
5.2 The screen of the monitor generates several vertical bars with equal spacing. This is due to impedance mismatch caused by the characteristic impedance of the video transmission line not being 75 ohms. The solution usually depends on the "start resistance" or "terminal resistance
5.3 There are several fine streaks on the monitor screen. Most of this interference is due to strong interference sources near the system. Try to avoid or stay away from the radiation source. If it is impossible to avoid the radiation source, strengthen the shielding of the front end and the center equipment. Use the steel pipe for the transmission line and the pipeline and ground it well.
5.4 A black bar or white bar appears on the monitor screen and slowly scrolls. This phenomenon is mostly caused by the ground loop generated by the system and the introduction of 50-week power-frequency interference (AC interference). Strengthen grounding. Sometimes this phenomenon occurs due to poor performance (or partial damage) of the power supply of the camera or matrix switcher. Adding a UPS. Poor contact of the video cable (head) may also occur. Re-do the line.
5.5 Wood grain interference on the monitor. The quality of the video transmission line is not good, especially the shielding performance is poor (the shielding network is not a good quality copper network, or the shielding network is too thin to be shielded). At the same time, the line resistance of this type of video line is too large, which causes a large attenuation of the signal, which is also aggravating the problem. In addition, the characteristic impedance of this type of video line is not 75 ohms, which is also one of the causes of intentionality when the main parameter is out of specification.
6. Real-time image problems, such as video image color, serious brightness distortion, etc. 6.1N system and PAL system selection is not correct, the image will become black and white.
6.2 Impedance mismatch. If the video is connected to a monitor with a high impedance, there will be very bright images, jittery characters, or sometimes characters. Set the monitor switch to low impedance.
6.3 If the transmission distance is too far or the video transmission line is too attenuated, the picture will be faded or black and white. Join the video amplifier.
6.4 The phenomenon of color distortion that occurs easily 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.
6.5 Problems caused by improper camera installation and adjustment. For example, improper adjustment of the camera after the intercept, there will be problems such as poor focus or defocus in the three variable lens operations. If the camera brightness is too low (do not try to change the brightness of the hard disk recorder to compensate), you need to adjust the brightness of the camera to compensate. The brightness is too high, you can add a 100 ohm resistor or 100K ohm resistor grounding on the video core. Do not backlight when installing.
6.6 DVR color, brightness, and other settings are not correct. After reading the default value, set it again.
6.7 Hard Disk Video Recorder Connected to the TV Output Sometimes the edges are bent. Adjust the output height and XY values ​​in the advanced options. Turn the curved line out of the frame to make the image appear straight.
6.8 Machine hardware failure, send the machine back to the company for repair.
7. Among the video output display may be superimposed image <br> <br> not caused because the video output mode, please "long press", "↑" key number next to the button to switch the video output mode. When VGA and BNC2 are output together, BNC2 is less effective and there is no OSD overlay. When using the VGA switcher, there is often no output due to the output mode problem. In this case, the switch key switching mode or the program using the default VGA output is required.
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