DIY camcorder repair

In detail: do-it-yourself video camera repair from a real master for the site my.housecope.com.

Video surveillance of the property is the most effective way to keep the property safe and sound. However, like any other device, the surveillance system can fail. And since the video surveillance system includes many devices, the number of problems is quite significant. Typically, parts of the complex are: one or several cameras of different types (cameras with built-in lens, dome cameras, in protective casings, covert surveillance cameras), video recorders, special cards for capturing images, a power supply unit and a drive on which the obtained images are recorded. With so much equipment, it's no surprise that IP cameras can fail.

The main reasons for equipment inoperability and breakdowns most often include:

Lack of maintenance, improper performance or maintenance out of time;
Incorrect installation of video cameras, mistakes when laying the control line;
Deterioration of the main components of the video camera;
Damage due to weather, mechanical damage from hooligans, branches, etc.
Defective product;
Too high or too low temperature at the installation site, high humidity;
Failure of the power supply;
Voltage surges and noise in the power supply or mains.

Most of the problems in the operation of video cameras are due to damaged wires or cables, which can be easily changed with a soldering iron.

If you have a video surveillance complex, for which some of the IP cameras no longer function, you should start by checking the video camera's uninterruptible power supply. It is he who most often fails.

In order to check the performance of the camera, it is necessary to test the performance of the infrared lamps installed around the camera to ensure shooting at night. If you cover these lamps with your palm and they do not light up, then the power supply of your surveillance system needs to be replaced. Another way to check if the camera is working is to connect its power supply to a voltmeter. If the output voltage is approximately 10-15 volts. If there are no problems with the power supply, you need to check the connector of the DVR. A non-working camera is connected to another connector, and if after that it works, then the DVR itself needs to be repaired.

Video (click to play).

When checking an IP camera, they also use a computer to which it is connected with special software to diagnose such problems. In this case, the camera must be displayed on the local network of your personal computer. It may be necessary to check the integrity of the cable with a tester. When the wire is short-circuited, without power supply, the tester will show that the resistance is equal to infinity. This means that somewhere your cable has broken, causing grounding.

If after all this your ip-camera does not work, then for further repairs you will need to disassemble the video camera. To do this, it is necessary to remove the housing, fixing elements, infrared lamps. After parsing, you need to inspect the camera circuit for swollen capacitors. If they are found, replacing them with elements with similar characteristics can help, and we check for heating when turned on. If after that the ip-camera does not work, you can try to connect the cable from another working camera to the non-working one. Broken cables in the tail of the device are a common problem. You can also try replacing parts of a non-working camera with modules that are working. Thus, you can quickly find problem modules and search for them.When assembling, after this, it is necessary to carefully fold everything in the same order and apply sealant at the points of attachment of the parts. This is required to avoid liquid getting inside the ip camera.

The most frequent breakdowns in the operation of video surveillance systems are:

Problems with supplying power to any part of the video surveillance system;
Damage or wear of control elements;
Inoperability of the server for receiving data from the IP camera;
Defocusing video cameras;
Lens fogging;
Failure of the microphone;
Problems switching to different shooting modes;

Moreover, server failures are very costly and difficult to repair. It is almost impossible to do it with your own hands, and the cost of repair work is close to the price of buying a new kit.

If the device does not send a signal and does not transmit an image to a working computer, it is necessary to check the electronic controls of the ip-camera and replace them with working ones. This can be done with your own hands. You can check which element is out of order using a tester, which is sold in any electronics store.

When the ip-camera is working, and there is a control menu, but the image is missing, the problem most often consists in the breakdown of the camera matrix. The matrix of CCTV cameras is characterized by frequent burnout. They are sold in many electronics stores. Using a soldering iron, you can quickly replace it with your own hands.

If the video camera works, accepts all incoming commands, but the control menu and the image from the ip-camera are not displayed on the screen, the problem most often consists in a failure or malfunction with the video output card. It is also sold in electronics stores. To fix the problem, you will need to replace it.

Does the IP camera keep shutting down or rebooting at short intervals? Most often this happens due to overheating of microcircuits. In such cases, most often the source of the problem is or problems with different versions of the firmware on the camera itself and the software of the computer to which the image is received. It is necessary to update the version of software or firmware on the camera. Also, the problem may be in the wrong place for the ip-camera, if yours is not equipped with a protective casing, then in direct sunlight it may overheat. The best solution is to move it to a shaded area.

In case of problems with the rotation of a PTZ camera, the most common source is rust on the gear wheel of the rotating mechanism or its erasure. The best solution is to replace it.

This malfunction can occur due to cable problems. Check the cable connections to the device inputs and how well they are insulated. If this does not help, try replacing the cables.

There are no problems in the operation of ip cameras, and the footage is not saved.

The problem in this case is with the internal storage of the recorder. Try to test the connection of the ATA / SATA cable to the corresponding port on the hard drive. If that doesn't work, try connecting it to your computer and formatting and defragmenting it. If the problem persists, the best solution is to replace the hard drive;

It is caused by improper operation with the infrared (IR) illumination of the ip camera. To fix the problem, try to disassemble it and check all contacts between the light sensor and the camcorder. The cable may have been broken in some place. It is possible to try to replace the cable between the IR module and the input connector. If this does not help either, you will need to replace the IR module.

First of all, check if the power is going to the DVR. If there are problems in the operation of his power supply. This can be done with a multimeter. Try replacing the dash cam power supply with a new one. If this does not help, then the best solution would be to take it to the service center for repair.It is a complex set of circuits, during the repair of which you can easily touch the unnecessary, therefore it is better to entrust its restoration to specialists.

Hello everyone. Partizan IP CCTV camera under repair today IPO-VF1MPthat stopped working after a thunderstorm.

A lot of such cameras are brought in for repairs, especially after weather disasters. Often, only the Lan interface burns out, but there are times when the processor fails, after which the repair of these cameras is not economically viable.

Fault diagnosis

To begin with, I connected the DC output of the camcorder to the laboratory power supply, and Lan to the network card of the computer.

I described how IP cameras are connected in this article.

The current consumption was 200mA, while it is not static, but changes in different periods of time.

This indicates that the camera's firmware and processor are working properly. One of the important signs that the firmware with the processor is working properly is a click, somewhere around 30 seconds after the camera is powered up. Thus, switching from day to night mode is tested during boot.

After waiting a few minutes, the computer still did not detect the LAN connection, and the Lan connection indicator on the camera itself did not light up either. Based on this, I assumed that the Lan interface of the camera was out of order.

Disassembly and repair

The camera is very easy to disassemble. First, unscrew the cover with the protective glass, then unscrew the three bolts that hold the entire IR illumination with the board.

Camera without protective glass

After unscrewing the bolts, I removed all the electronics from the case.

PoE card with connected interface connectors.

The first board, to which all the wires are connected, performs the PoE (Power over Ethernet) function, that is, supplying power to the camcorder not through a DC plug, but using a twisted pair cable and special Poe equipment. You can read more about this on Wikipedia.

Having unscrewed 4 bolts I got to the main board itself.

Removing the lens. It is not necessary to do this, but just in case, I took it off.

Having applied power to the camera again, I determined that the microcircuit is very hot 8710A, it is also the Lan-interface of the camera. In a normal state, these microcircuits hardly heat up, so you need to change it unambiguously.

Having completely removed the board, I installed it on the holder. To protect the plastic elements, I covered them with foil.

Having applied flux to the soldering site, removed the microcircuit with an average air flow.

After cleaning the soldering point, and tinning the tracks with lead-containing solder, I started preparing a new microcircuit for installation.

Prepared soldering point

For this, the microcircuit must be lubricated with flux, and all contacts must be well tinned.

Prepared microcircuit for soldering

Having installed the microcircuit on the board, he began to warm it with an average flow of air until the solder melted and the microcircuit sat down in its place. The temperature of the hair dryer was about 320 degrees.

A new microcircuit is installed on the board.

Also, after soldering the microcircuit with a hairdryer, you need to go over the contacts with a soldering iron in order to exclude possible undershoots.

After cleaning, it's time to plug in all the connectors and check the camera.

After energizing, the current consumption dropped to 90 mA.

Consumption of a camcorder after installing a new microcircuit

The computer recognized the local network connection, although the LED on the camcorder did not work.

Local Area Connection Indicator LED

If you look closely, you can see a black dot in the center of the LED, apparently the discharge was so strong that it was out of order. Since the connector is not collapsible, there is no way to change it.

After installing the program for the Partizan CMS video camera, it was possible to successfully connect to the camera. The picture was normal, the ping of the camera was smooth.

Video camera image

Also, I decided to check the switching to night mode, for this I covered the light sensor with my hand, which is located on the board with IR LEDs.

The camera switched to black and white mode, consumption increased, which means everything is working properly.

Image in night mode.

Further, the camera was assembled and given to the owner. Thanks for watching and good luck with your renovations.

Usually, when buying a product or device in stores and unpacking it at home, we come across various waste paper that tells us about the product itself. In addition to these pieces of paper, we can also often notice the rules for the use and repair of the device in the event of a malfunction. They are needed in order to warn the user, as well as warn him how to handle the equipment, because in case of improper handling, the store or service that provided us with this product can deprive us of the established warranty, after which we will be deprived of free repair of the device , in the event of a breakdown.

With regard tovideo monitoring systems, then it is not one single device, but several elements interconnected, making up a single system.

This system itself usually consists of a video recorder, video capture cards, a small number of cameras with certain functionality, a power supply unit, a hard disk for recording data, the necessary connectors for connecting wires, as well as a device for displaying an image.

Basically, after the installation of all equipment has been successful, the customer refuses further service, citing the fact that the manufacturer has already provided him with protection in the form of a guarantee. The warranty period for this type of equipment generally ranges from 1 to 3 years. Of course, installing such equipment, the customer, first of all, wants a longer service life, but anyway, sooner or later, any equipment may malfunction or even fail.

Possible causes of equipment failures:

No image on the monitor... In such cases, it is recommended to check, first of all, whether power is supplied to the monitor or TV, as well as to check the operation of the network itself. If the problem in the power supply was not found, then it follows that the fault is on the monitor or TV itself.
One of the security cameras malfunctioning... A standard video surveillance kit usually includes 4 CCTV cameras, and if one of them fails, then first of all you need to check all the BNC register connectors. If, after checking the connectors, the camera still does not show signs of operation, then it is already worth checking the voltage in the network itself, using a special tester, which is sold in any electrical store.

I will dilute posts about replacing glasses and displays with a post about hardcore repair of an outdoor video camera that failed after a thunderstorm.

Here's a camera. I connect 12 V - the effect is zero, as is the current consumption.

Visual control under a microscope, without it in any way. Immediately I see a diode with a beautiful hole, I check it with a tester - the resistance is equal to infinity, so the diode is broken.

It was broken for a reason, but due to the flow of a large current through it. This is the reason.

Short-circuited six-legged DC-DC step down. I fix the board in a mega-convenient holder.

I blow off the diode and shimka, check the resistance of the power circuit - a few kilo-ohms, then everything is fine, there is no more short circuit. I take out an analogue from the bins.

I solder it in place and the diode.

I connect it to the power supply unit, set the current limitation to 100 ma, so as not to burn anything else.

72 ma is her native current consumption, so far everything is according to plan. I poke the oscilloscope on the throttle leg of the shimki.

Beauty, shimka works. I connect the camera to the monitor, everything is OK.

It seems to be all, but no. Infrared light does not work.

Could be replaced, but I have the same backlight from disassembly. I'll put it on.

The camera is working, will be installed by the installers back on the object. Everything.

A bit not a modest question, but still: How much does this work cost? It's just that this matrix costs about 400-600 rubles, and the backlight is even cheaper. Is it worth the candle?

In this case, the repair is equal to the cost of the diode and the shim. The diode was soldered free of charge from some kind of laptop board, and the shimka costs 20 rubles for Ali. This camera was at our client's facility, among others (several dozen), so it had to be restored. In more severe cases, of course, I change the module.

PS Do not count it as an advertisement, but if there is no work now, we can take it to ourselves)) It will be interesting - write)

Thanks for the offer, but there is work to do. I'm not only fixing modules from cameras))

Sometimes I also suffer so much, but you are so far away. (north of tomsk region)

I also change modules, nerves are cheaper.

The polarity reversal is unambiguous, the client is to blame.

Vertically in a vice, and from above neatly along the seam, along the knife, with a hammer.

a knife is better not. with a hacksaw for metal, carefully saw it along the seam and open it, and then glue it with dichloroethane. but you can just rewind with blue duct tape.

you can still black - in color, but blue is safer

The question is - you get the scheme of this camera was originally and did you know what was there? it's just that sometimes the inscription burns out and you can't make out what kind of part it was.

The question immediately arises regarding the replacement of shimok. They burn a lot in what. Is there a chipset (list) that will fit most of the time?

Announce the entire list, please!

Respect! instrument is nothing. I change modules.

Do you solder smd with a soldering iron or a hairdryer?

I solder with a hairdryer, solder with a soldering iron

Here the prospect of STM soldering is outlined, how to solder it so that the legs do not stick together? Is there solder paste on Ali (but I understand it only for a hair dryer), is it possible to apply it, and at the same time solder all the legs with a soldering iron in turn?

use the flux, it increases the surface tension of the solder and the legs do not stick together, the main thing is to get the hang of it, well, the soldering iron is not like in the picture

Such a question: Hikvision outdoor IP camera, moisture ingress into the connector (IP68.) With rotting of the contact, the connector is restored (called back, pressed it, put a pass-through). It is possible that the storm is also to blame. Result: does not start from 12v power supply, with PoE turns on infrared illumination, but does not go into working mode. The problem is on the power board, the rest is working, replacing the power board from the donor was successful, now I am trying to resurrect the donor with broken glass for internal use. There are no visible breakdowns. Where to dig?

There is also an outdoor camera, no one undertakes to fix it. Maybe there is a desire to try?

OssYl cool, did you take on ebay?

@LabOfRepair, can you advise something)
Broken tablet Huaiwei Mediapad 7, not light, but simple. It turns on, comes to the Huaiwei screensaver and then the screen is cut off. The service could not help, they said that it was working, but for some reason the screen was cut down and they could not install the firmware.
I tried to roll back to the factory version, the same garbage, the screen is cut down and that's it.

If it is sewing normally, then it is very similar to a power problem - the tablet boots up, comes to startup, the current consumption rises sharply, there is a failure in one of the supply voltages and everything is cut down. Instead of a battery, you need to try to connect a laboratory power supply unit and start a tablet with it.

Where are you located? And then my tablet stopped charging when it was on (although the indicator shows charging), I'm looking for normal repairmen. Tablet GT-P6200.

Recently, the installation of video surveillance systems at various objects of the national economy has become very popular. This control system has found its application in everyday life. Very often the video control line is installed in apartments and private houses. The defense system is quite complex in its complex composition. It includes various optoelectronic and technical devices, including video cameras, video recorders, power supply, connecting wires and other auxiliary equipment. Like any technological complex, a video surveillance system can malfunction. Often, the reason for the inoperability of the line is the breakdown of the camera. Repair of CCTV cameras can be done by hand or with the help of specialists.

In order to independently repair CCTV cameras, it is necessary to determine which classification type the device belongs to. Camcorders differ in a number of ways:

Type of color rendering (color and black and white);
Surveillance method (covert or open video surveillance);
Observation corner (swivel and non-swivel);
Appearance (standard and domed);
Method of information transmission (wired, wireless, IP cameras).

The video shows the repair of a CCTV camera:

The reasons for the failure of video surveillance systems can be varied:

Untimely maintenance of equipment or its absence;

Making mistakes when designing a control line;

Poor quality installation work;

Violation of the rules for installing surveillance cameras and other components of the system;

The operation of the surveillance camera for a long time to failure (development of the envisaged working resource);

The impact of external factors, including weather conditions;

Manufacturing defects.

In order to determine why the CCTV cameras caused the failure of the whole complex, it is necessary to diagnose them. To do this, you need to check the power supply and its value. To test the functionality of the video equipment, you can connect the device to another test system. If the system is equipped with an analog video camera, then it must be connected to a mobile tester. In this case, the video signal feed will be checked.If the complex is equipped with IP video surveillance cameras, then testing will be carried out using a personal computer. In this case, specialized software must be installed on the computer, and the camera must be displayed on the local network.If, after performing such actions, the camera has not recovered, then you need to contact the service center for help.The specialists of the service centers will be able to carry out better repairs of cameras, since in case of failure of any element of video equipment, it is necessary to open the case of the device. In practice, there are cases when the warranty period has expired. Then you can repair the camera yourself. This requires a minimum of technical knowledge.For example, if the lens on a CCTV camera is fogged up, you should carefully open the case. Further, all internal mechanisms must be thoroughly dried. After that, the device is assembled, while the connecting places are treated with a hermetic lubricant. The sealant will prevent moisture from entering the mechanism.Camera malfunctions can be varied. Experts identify the main types of breakdowns:

Interruption in the power supply to the camera;

Failure of one of the radioelements;

Failure of the IP-server of video control cameras;

Failure of device focus settings;

Fogging of the lens glass from the inside;

Inoperability of the microphone;

Violation of shooting modes.

The failure of the IP-server of cameras today is a very difficult breakdown. The repair of such equipment is quite expensive. The cost of repairs is the same as the cost of purchasing new equipment. In addition to the above malfunctions, video equipment may have the following reasons for failure:

Damage to the power board in the surveillance camera;

Soldering of individual parts of the board;

Break in the cable connection providing power to the device;

Violation or open circuit in the video output circuit (in this case, the image and the settings menu are absent);

Impact of a lightning discharge;

Overheating of microcircuits of video control cameras;

Unreasonable reboot and shutdown of equipment.

The process of identifying the causes of malfunctions in an IP video surveillance camera is significantly different from an analog mechanism. First of all, this is due to the complexity of the assembly of electronic boards.Diagnosing breakdowns requires some effort. The failure of the device can cause the following reasons:

Pulse noise in a camera or network;

Voltage drops.

To eliminate the cause of the voltage drop, it is recommended to install special stabilizers.There are often cases when the video camera does not transmit any image and does not respond to the sent requests. This could be due to burned out electronic control boards or damaged connecting cables. You can fix such a malfunction with your own hands. To do this, it is necessary to replace the broken part.It happens that the camera is loaded, the corresponding control menu is displayed on the monitor, but there is no video image. In this case, the cause of the breakdown is obvious - this is the burnout of the matrix. This part, as a rule, is presented in the form of a candy bar equipped with a sensor board. Replacing it yourself will not be a problem.Another common problem is the lack of display and control menus. At the same time, the equipment is operational and accepts requests. The problem is caused by an interruption in the video output circuit. To restore the operation of the mechanism, it is necessary to replace the corresponding board.If the video device automatically reboots or shuts down periodically, a hardware failure is possible. In this case, the microcircuits may overheat. To troubleshoot the problem, you must eliminate the cause of the overheating. A common problem in the operation of the system is the inconsistency of the firmware of the mechanism with the installed software. The camera needs to be reinstalled in a different location or the software must be updated. It is better to update the factory firmware of the device to a more modern version with the help of specialists.When installing PTZ cameras, remember that their malfunction is caused by a number of technical reasons:

Rotary gear wear;

Contamination of the control sensor;

The call appearance program has failed.

Software problems can be resolved by updating the firmware version, and mechanical problems by replacing individual parts.Systematic maintenance of the video surveillance system is necessary for the smooth operation of the entire complex. Qualified maintenance is the responsibility of specialized firms.For this, an agreement is concluded between the parties. It must indicate the frequency of maintenance work.To understand what maintenance is, you need to know which devices need constant monitoring. The video recorder is a component of the video monitoring line. It should be checked annually and free of dust. The device must be located in a ventilated area. Its periodic check will ensure the smooth operation of the entire complex, since it is possible to identify and eliminate the causes of possible malfunctions in a timely manner.Maintenance of video equipment is essential. The device can become clogged with dust. Most often, dustiness occurs when installing devices in a room (apartment, office). A layer of dust is deposited on the lens cap or lens. As a result of dusty conditions, the video image will be fuzzy and dark. If external mechanisms are used for video monitoring, then periodically it is necessary to check the condition of the case, gaskets and seal. Over time, these protectors can wear out or crack.To prevent malfunctions in the control line power supply, it is also necessary to carry out systematic maintenance. When performing maintenance actions, it will be possible to identify voltage drops in a timely manner. If we are talking about uninterruptible power supplies, then the batteries are subject to verification.1. Camcorder Sony-CCD-TR670E. Zoom and focus do not work.The reason is the poor contact of the loop with the connector coming from the board of the camera unit to the focusing and zoom motors. Eliminated by disassembling the camcorder and re-docking of this connector.2. Camcorder Panasonic-G-101. The cassette receiver does not close, the rack guides move back and forth, but not for the entire range of travel. According to the owner, before the final breakdown, the device turned off during recording and playback, sometimes it did not close. The reason is a dirty software gear, with the whole L.P.M. do not disassemble. It is enough to drip alcohol / gasoline into the program gear and turn it several times (of course, not with your hands).3. Sony (video-8) Camcorder very often the monitor screen starts to glow brightly with a reverse beam path - the reason for the impingement of the deflection pulses in the video signal. It is necessary to evaporate the electrolyte through which the pulses go to the deflector (usually 80 microfarads), rinse the board under it with alcohol and solder it back with a mica pad.4. Video camera SONY CCD-FX280E Handycam. Defect manifestation: Unable to load a cassette into the camera. (the cassette receiver does not close). What happens: the screw that secures the monitor from the inside is loosened and sticking to the magnet of the motor of the video heads, jamming it. It is checked by checking the free rotation of the video heads.5. Camcorder SAMSUNG VP-U12. Chaotic white dots appear in the image when viewing recordings. On pause, they disappear. Search for a malfunction should be in the engine of the tonal. It should be dismantled, the capstan should be removed. A defect in the metal coating of the rotor, which peels off, rubs the insulation of the stator windings. The solution is as follows: the metal coating is completely removed from the rotor (including magnetized particles). Further lubrication and assembly in reverse order. So far, I have come across 2 devices with such a defect.PS This defect is also found in JG video cameras.6. SONY CCD-TR330. The problem is: (1) The cassette drawer is in the eject position and will not close. Manual removal of the loading mechanism to any position (for example, stop) with the subsequent supply of power to the camera brings it to mode (1). The malfunction is eliminated by soldering the SW switch pins on the flexible board.7. SAMSUNG VP-H66 camcorder. The defect is exactly the same as described in paragraph (5.) of this page. I have sent a letter to the SAMSUNG representative with a request to answer:
1.) Who is the supplier of these motors?
2.) whether the above mentioned company will correct the “manufacturer's error”.
3.) Will all cameras with this defect be repaired free of charge? Regardless of whether the warranty period has ended or not.The answer will be posted on this page.A letter sent to the representative office of SAMSUNG.In the process of repairing your company's products, in particular the SAMSUNG VP-H66 and SAMSUNG VP-U12 video cameras, I and my colleagues in different parts of our country came across a defect. This defect manifests itself as follows. When using the camera while shooting, horizontal stripes appear on the screen across the entire screen. Further, after continuing to use the cameras, they stop accepting the cassette. When disassembling the camera, it was found that the result of this defect is a gross violation of production processes. Namely: the rotor of the motor contains a magnet which, in turn, is covered with a layer of tool varnish, which deteriorates over time. This coating (varnish) is quite hard and over time wipes off the varnish layer on the motor windings. I think that the service dealerships are very well aware of this defect. This defect was also found in LG cameras. Most likely the engine supplier is the same company. I am officially protesting your company and asking you to answer my questions.1.) Who is the supplier of these motors?
2.) whether SAMSUNG will correct the “manufacturer's error”.
3.) Will all cameras with this defect be repaired free of charge? Regardless of whether the warranty period has ended or not.I will post a letter with your answer on my page.8.) Camcorder JVC model GR-AX338. The defect is like a dirty software switch, but it's not about it, but about the CN02 connector into which the ribbon cable from this switch is inserted. The repair consists in soldering the connector.9.) Samsung - Temporary malfunctions: stop during playback with complete shutdown, the cassette is loaded. BVG rotates, complete shutdown, etc. Clean, solder and tighten the internal contacts of the stabilizer board connector and the carrier board.10.) If it is necessary to clean the contacts of the program switch in the camcorder without the hassle of disassembling it, the liquid KONTAKT PRF7-78 produced by TAEROSOL (Fin) is amazingly helpful. I inject it through a thin tube (complete with a cylinder) directly into the gap of the program. gears. Penetration, cleaning and lubricating properties are simply amazing. The ever-wheezing volume controls in domestic equipment begin to work like new.Typical malfunctions of SONY camcorders. Image - DIY camcorder repair

Equipment diagnostics.

Let's say you have a video surveillance system, and one camera out of four stops showing.

Firstly, it is necessary to check whether the power is being supplied. Because most often it is not the video camera itself that fails, but its power supply.

Almost all modern devices have IR illumination located around the lens. We cover the light sensor or the front panel of the camera with our hand so as to exclude the ingress of light. Built-in IR illumination, should light up in red, you can see it through your fingers. Also, the voltage can be checked with a multimeter (tester) at the output of the power supply, most video cameras consume 12 volts.

Secondly, check the channel on the recorder (for AHD / TVI / Analog). We connect the faulty camera to another channel of the recorder, there are cases of burnout of one of the channels - the DVR will need to be repaired.

Dismantling and repair of a video surveillance camera.

If you did not reveal any problems - go to disassembly. It is good if there is a second same camera (working copy). We disassemble the faulty one first. Carefully open the case and unscrew the bolts securing the module / lens / IR illumination. We make a visual inspection of the equipment. We check the module for swollen capacitors, if we see problematic ones, perhaps their soldering to similar ones will help. Immediately after turning on the video camera, the chip on the module should start to warm up. On cheap or weak modules, radiators are usually not installed. If the chip is heating up, it means that power is coming to it.

Camera still showing no signs of life? We take the second (working) and put it on its tail - the problem one. There are broken wires in the tail of the camera. By rearranging the elements, we can establish what is out of order on our camera. If the module burns out, we replace it entirely, if the infrared IR-Cut filter, lens or IR LED illumination, they can also be replaced. DIY repair will consist in finding and replacing the faulty item. Nowadays, finding them in retail is not easy. The task will be greatly facilitated if there is a “donor”.

If digital ip camera stopped loading - try to "reset" it. On some models there is a reset button, which can be pressed with a pin / pin, or when the camera is turned on, two unused contacts on the power block are closed. Also came across models on which reset is displayed on the tail. If there are no reset buttons, you can try to reset it programmatically, using the settings via the web interface or the ResetTool utility. Happy renovation!

Repair of video surveillance systems: external manifestations of malfunctions, causes and remedies

Despite the seeming complexity of a video surveillance system, malfunctions only occur in three main elements: cameras, DVRs and the cable network.

The most common causes of equipment breakdowns: violation of the temperature regime, excess of the permissible humidity level, installation errors.

Also, quite often systems do not work due to non-compliance with key operational requirements, improper cabling.

Doesn't give an image, even a background image, doesn't respond to requests. Burned control boards, physical breakage or damage to power cables may be the cause. The problem is solved by replacing the damaged parts.
The camera is loaded with the internal menu displayed on the monitor, but there is no image. Burnout of the CCD matrix. If this part is a candy bar with a sensor board, then replacement is not difficult.

Loads, listens to control, but there is no image, and the menu does not appear. In most cases, this is a breakdown along the transmitting circuits of the video output. The reason could be interference and large voltage surges from the operation of powerful equipment (electric welding, etc.). Board replacement required.

When choosing a video intercom model for an apartment building, first of all, you need to decide what kind of picture you want to get - color or black and white.
There is a criterion by which the comparison and selection of video cameras is made - the "viewing angle", but for rotary devices, the focal length is more important. Read more about PTZ cameras here.

The image is received, the menu is loaded and tested, the PTZ device is not controlled. Burnout of the control board on port 485, as a rule, due to interference in the ungrounded twisted pair. Control board replacement required.

Unstable operation, expressed in periodic shutdown and reboot, in the presence of a PTZ drive, control does not obey. A hardware malfunction is possible - overheating of the microcircuits. Software malfunction - a failure in the firmware or version mismatch with the control program.

It is recommended to reinstall the camera to another location (perhaps it is mounted above a heating device or air conditioner), flashing with the transition to the current version. ATTENTION take the firmware only from the manufacturer's website.

After starting the test, it hangs, then gives an error. When starting the camera, many models perform an autotest of the device; the composition of the testing program depends on a specific model and manufacturer. As a rule, in the passport for the device there is a plate of error codes and the proposed actions to eliminate them. But errors can also be caused by external causes.

wear of the gear wheel of the rotary device;

contamination of the rotation control sensor;

failure in the logic block program.

The mechanical parts should be replaced, the camera firmware should be updated.

DVR does not load... First of all, you need to check the correctness of the connection to the mains, there may be a malfunction of the power button or HDD disk, the control panel of the device. Software reasons - incorrect device firmware update.
The video recorder turns off by itself... Unstable power supply, lost contact of the hard disk cable, sticking of the power button, dust pollution and, as a result, overheating of the processor.

The system does not see the HDD... The disk itself is faulty, the ribbon cable is damaged or lost contact, the SATA port on the board does not work. In some cases, it helps to simply plug the loop.

No camera image on output... Firmware incompatibility between cameras and DVR, too weak signal, incorrect screen settings, incorrect privacy zone setting.

There is a distortion of the color format when viewed in real time. Incorrect monitor settings, too far distance to the camera, incorrect NTSC and PAL settings for BNC output.

Video distortion when viewing archived records. Low write standard selected, file read error, write error due to loop damage.

Most of the malfunctions associated with the DVR are corrected by a banal system reboot. In this case, do not forget to clean and check the contacts inside the device at least 2 times a year.

Cable networks are the main cause of video surveillance malfunctions.
Influence of radio interference

Of the entire spectrum of radio emission, high-frequency waves can have the greatest impact. Electromagnetic disturbances in signal transmission lines can be caused by nearby powerful radio and television transmitters, radars, microwave emitting equipment and other emitting equipment.

Such interference appears in the form of image distortion, stripes and lines on the screen.

Lightning effect

Lead to massive burnout of ungrounded equipment. Standard protection systems for buildings and structures - lightning rods are not designed to protect data transmission lines and electronic devices.

Compulsory grounding of shielded cables and devices is required. In accordance with the technical requirements, the grounding of all network elements must be at one point.

Stray currents in grounding

When performing installation work, especially in multi-channel systems, grounding rules are often ignored. This is sometimes technically impossible to accomplish, especially when using cheap cameras where the BNC connector is not isolated from the case.

The body of such a device itself is grounded to the corresponding contact of the flying plug, which has a grounding terminal. In fact, grid zero is used instead of a ground bus. Accordingly, several such points are formed in the video surveillance system.

Dips and overvoltage in power networks

They are caused not only by the low quality of power grids, but also by periodic daily fluctuations. Peaks of fluctuations occur in the morning and evening, the highest level of overvoltage at night.

Phase imbalance and neutral overload are a less common cause of overvoltage in networks associated with errors in wiring.

Periodic and single impulse noise:

switching on and off lighting and climatic equipment that consumes a large amount of electricity;

turning on and off devices and devices with a high level of inductance: starters, transformers, operation of electric welding equipment, etc. etc.

accidents and short circuits in low-voltage circuits with subsequent operation of the RCD;

the influence of inductive interference from the operation of urban electric transport.

With the correct installation of the network and the selection of devices, the repair and maintenance of video surveillance systems will require much less financial and labor costs.
Power supplies supply energy to 4-5 devices, no more. The reserve of the rated power supply must be at least 1.4 times greater than the actual consumption. A separate power line must be connected to each chamber.

It should be borne in mind that for some models of external cameras, the secondary internal source is not always galvanically isolated from the camera body. Count the power consumption of all possible devices at a remote video surveillance point: thermocouples, lighting, rotary devices.

Avoid using twists when connecting wires in outdoor power lines, or whole boxes, or adapters in junction boxes. As a last resort, be sure to use heat shrink tubing.

When attaching the camcorder to a conductive surface, be sure to install an insulating pad. Do not ground the camera body to a random metal structure, only use dedicated ground straps.

Video intercom for giving CDV-72BE Commax, which has a 7-inch TFT color screen. Has built-in memory for 128 frames with high resolution.
Before purchasing a touchscreen videophone, you need to decide on the diagonal of its screen. its size is the main dimension of the device. Read more about choosing a touchscreen video intercom in this article.

Before connecting the camera to the DVR, it is necessary to check the potential difference on the device cases. When using BNC connectors, a difference of 35-40V may burn out the output circuits of the camcorder.

The use of normalizing amplifiers is possible not only in long lines, but also to improve the clarity and brightness of the image in ordinary ones.

Video (click to play).

As a rule, the maintenance agreement does not include a condition for expanding the video surveillance system, but the use of DVRs with a large number of ports will greatly facilitate the scaling of the video surveillance system and reduce its costs.

Rate the article:

Grade 3.2 who voted: 85