Hi all!

It's no secret that our stores are literally filled with cheap Chinese electronic products. All kinds of models of TVs, telephones, household appliances, DVD players pleased us with their price. The work of the craftsmen has also increased (for which many thanks to our Chinese manufacturers), who maintain and repair this equipment.

In this article, I would like to draw your attention to DVD players , since they are cheap, and repairs can cost an amount that slightly exceeds the cost of the device itself. Many of my clients, having learned how much it will cost them chinese dvd repair , simply abandon their devices. The fact is that the parts for such devices are quite expensive, and if you add the cost of the repair itself, then it will be cheaper to buy a new one of the same device than to bring the old one to life.

This article is intended to help citizens who wish this, not to spend money on paying for the work of a master, but to try repair dvd by hand .

In practice, all breakdowns of DVD players are basically the same and come down to such manifestations:

The screen says "NO DISK" or "Error";

Disc freezes during playback;

The disc won't boot or it takes several attempts to boot;

The disk does not spin up.

The reasons for such ailments of the player are also, for the most part, the same and boil down, in turn, to the failure of the following elements:

Laser head or reader (as it suits you);

The motor that rotates the disk (or spindle motor);

CPU;

Driver.

laser head

The most common failure in DVD players is . The malfunction may manifest itself in not reading discs, reading discs only of a certain format, or freezing. Such a malfunction occurs, mainly due to low-quality disks that “crumble” and contaminate the reader. Sometimes it is possible to eliminate this problem simply by cleaning the head from dust and dirt. But, in most cases, it is necessary to replace this component with the same or analogue.

How to replace the laser head is described.

Engine

An engine malfunction manifests itself as follows:

the rotation speed is not constant or jerky, slowing down;

the motor does not rotate at all.

This defect is eliminated by replacing the motor. When replacing, you need to install the engine along with the nozzle (they are sold that way). The distance between the motor and the nozzle must be defined, otherwise the head laser will not be able to focus the signal on the disc surface. Manually setting this distance is quite problematic.

How to replace the motor in a DVD player, see THIS video.

CPU

Basically, in the production of DVD players, a processor of the MT1389 type or similar is used. You can find out if the processor is buggy or not by heating it. If the processor is very hot, then you should check the elements that are on its power supply of 1.8 V and 3.3 V. I want to note that in cheap Chinese DVD players there is no processor protection, as such, and power stabilizers are assembled on transistors (simplified scheme). In this regard, normal stabilization of the processor supply voltage does not occur, and when overloaded in the 220 V network, the processor itself or its batteries may fail.

If the power supply is good, but the processor is still heated, then it is faulty itself. In my opinion, it is not advisable to replace the processor, since its cost is quite high and it will take

Driver

The driver is a microcircuit that controls all the mechanics of the player: all the motors, the focus coil of the laser lens, etc. The driver receives commands for control from the processor.

If it gets very hot and at the same time malfunctions of the mechanics appear (loading / unloading drive disk, not spinning, etc.), then, most likely, it was the driver that failed. In principle, it should warm up, but if its heating does not tolerate a finger, then you need to be wary. Also, the driver may warm up due to a malfunction of any motor, so all motors must be checked before replacing it.

You will also need to replace the driver optional equipment, namely a soldering gun or.

DVD-ROM is one of the most "fragile" devices that can fail. This is not even connected with the user's actions, but rather with the design. The multitude of mechanical parts that must be electronically coordinated, the high frequency of operation and the need for positional accuracy all greatly affect the ultimate durability of the actuator.

In addition to the design itself negative impact performance is affected by the constant race between the manufacturers of blanks and DVD-ROMs themselves. Some are trying to release recording discs as quickly as possible, others are trying to catch up with them, forgetting to update already released devices in time. By the way, this is the first problem that can occur when using a laptop for a long time - the lack of the correct firmware. To fix this problem, you can do the following:

• Search for a new firmware that eliminates incompatibility on the website of the manufacturer of the laptop model;
• Search the Internet for sites, the subject of which is the removal of zoning of drives.

Using this advice, you can either fix the problems that have arisen in the drive, or just keep up with the times by installing new firmware.

It happens that the drive still starts to “jump”, or refuses to work at all. To identify and fix the breakdown, you can use the following step-by-step instructions:

• We check if the problem is related to the drive, or it lies in system errors. First, we go into the BIOS (the Delete key at boot), then we delve into the settings and see if the drive is detected at all.
• If the drive is detected, the problem may be in the firmware or in the registry (that is, the installed drivers do not work quite correctly). You can fix the problem by installing a new firmware, updating drivers, downloading a program to check and clean the registry.
• If the drive is not detected, then you need to check the connection and power. The presence of power can be determined by simply looking at the drive indicator when the laptop is turned on (or by inserting a CD). If it is lit, then there is power. To check the connection, you need to disassemble the laptop to a state in which you can remove the drive. To do this, you need to remove the battery, turn the laptop over, unscrew the fastening screws at the back, remove the cover, unscrew the screws holding the drive, and carefully disconnect the cable. Taking the cable from the drive and replacing it with a new one (or trying to check it by connecting it to another device), you can understand if the cable is working. If it doesn't work, a replacement may solve the problem, if it works, the problem may lie in the DVD-ROM itself e.
• To check the drive, we disassemble it to a state that is possible without special tools - basically, to the board. We inspect the board for defects, scale or dark places, check all connections. If some elements are burnt out and there are no spare ones, it is easier to carry out a complete replacement of the drive, i.e. buy new. Otherwise, using a soldering iron, you can replace non-working elements. And with the help of a brush, clean the places from scale.
• If there is no damage inside the actuator, the lens may be damaged. To clean it, use special means, which are sold in computer stores (in principle, it is useful to clean the lens once a year).

If there are no changes after the actions above, you must take the drive to a service center, or replace it yourself.

In the case of replacing the old drive with a new one (in case of fatal breakdowns, laptop update), there may be a problem with the operation of the drives in two modes: primary slave or secondary master. You can solve the problem by updating the firmware, which will change the mode, or fix the defect manually by setting the cable select jumper. But often, the installation of a jumper is not provided constructively, then it is necessary to put it on manually. For this you need:

• Disassemble the laptop to access the DVD-ROM;
• Remove it from the laptop, carefully disconnecting the connections;
• Unscrew the fastening screws from the drive housing;
• Using a thin wire, pressing the hole in the drive, open the tray;
• Remove the cover and pull out the tray;
• In the IDE connector of the laptop, it is necessary to put a small jumper between pins 47 and 49 (the count should be taken from the corner closer to which the connector is located);
• Assemble back, checking the operation of the drive.

In addition, when replacing a drive, a problem may arise in that you can damage the old sled or adapter. You will have to look for a similar one on the market, or order an original drive with all the setting elements. Therefore, the main rule when replacing a drive is not to throw out the fasteners and handle them carefully. Also, do not throw out the front panel, because. in some laptop models, it is not straight, but has an original shape (curved or bent). More often than not, a new analog drive may have a standard straight faceplate, which will either look unaesthetic or prevent the drive from being installed properly.

The drive is a rather complicated mechanism, but you can fix it yourself. It is enough to understand a little how a CD or DVD-ROM works. Naturally, laptop repair is best left to professionals, but if you are confident in your abilities, you can try to do everything yourself. If the disc is not readable, then there may be a lot various reasons: from mechanical problems to software failure.

Main malfunctions and methods for their solution

To get to the drive in any laptop, you first need to disassemble the device. To do this, the back cover is removed, and the screws are unscrewed in a certain order. How to do this correctly, it is better to look on the Internet, where there is a video for almost any laptop model with detailed disassembly instructions. It should be noted that if the device is still under warranty, then it is not recommended to disassemble it yourself. It is enough to contact the store or the manufacturer with a breakdown.

Quite often in laptops, the device for extending the drive breaks down. If we look more closely, this function is performed by a separate mini-motor, which is connected to the drive itself by gears. The teeth are often erased, so you just need to restore them. To do this, a small amount of straightened plastic is dripped on top, and then wiped with a needle file to give shape.

If it is the disc reader that is faulty, then you need to check if the laser is working, and if there are any impurities at the landing site. Most often, problems begin precisely because of dirt, and therefore you must first carefully wipe all the elements of the system.

The drive device is very complex and highly accurate, so it may not be possible to repair it. But the cost of this mechanism is not so big, therefore it is better to purchase a new part and replace it. It is quite easy to do, just look at the instructions on the Web.

• How to clean laptop DVD

Although DVDs are becoming obsolete, they are still found on many computers and laptops. Many people have a licensed Windows system stored on disk and require a DVD drive to install it (although it can be burned to and installed from a flash drive). Therefore, I want to consider in this article how you can, using simple tools, clean the DVD drive in your computer or laptop.

I have been using the method described below for many years and it has proven to be very effective.

The reason why the DVD drive began to work poorly, not read discs or do it intermittently, most often is dust on the laser lens. Here we will clean it.

Required tools:

• Philips screwdriver (cross);
• Regular paperclip (it needs to be straightened);
• Cotton swab or stick.

How to clean your computer DVD drive

First, remove the DVD drive from the computer. This is not required on a laptop.

Turn it upside down and unscrew the 4 screws that secure the lid.

Remove the lid very carefully and set aside. Our attention will be a board with electronic components.

Now we put the drive so that it looks at us with its front panel. We insert our unbent paper clip into a small hole designed for emergency opening of the drive tray. Feel free to press on the paper clip until the tray comes out a little from its place.

We pull out the tray manually to about half its length. Now remove the front plastic panel. To do this, you can press a screwdriver on the side latches.

Side panel latches

Now turn the drive upside down and carefully remove it from there.

Removing the DVD drive from the cover

Now you can see the very laser lens that needs to be cleaned. Consider it carefully. Most likely you will find small hairs or dust on it.

Do not try to remove dirt with your hands. There may be greasy stains that will be difficult to remove.

We take a cotton swab and lightly brush off the dirt from the lens. No need to polish the lens, just remove dust and hair.

Cleaning the lens with a cotton swab

After such a cleaning procedure for the drive, you need to assemble it in the reverse order.

How to clean laptop DVD

The procedure is the same as with the computer drive. Just don't take it apart.

Simply pull out the DVD tray and gently wipe the lens with a Q-tip.

Most likely, after such manipulations, the DVD drive will start reading discs that were previously ignored by it. If there is no noticeable improvement, most likely it can no longer be helped and only a replacement is required.

If you liked this guide, please like and share it with your friends.

PCgu.ru

How to fix the built-in optical drive in a laptop with your own hands

Damaged DVD or CD drive in laptops is the most common flaw in devices that have worked for more than 2-3 years. Dust that will definitely settle on the focusing lens after many years of operation, for sure, if it does not lead to a complete failure of the drive, then it will make its operation less reliable and faster. The reason for the complete failure to receive or write information from a computer to an optical medium may lie in both hardware and software malfunctions of the system. Remember: the optical disc drive in laptops can refuse to read information from DVD discs for a lot of reasons.

First, it is necessary to 100% eliminate the possibility of a software failure in the operating system. You can simply insert a disc into the drive that can be used as a bootable one. Either an installation distribution kit with Windows, or some kind of service disk designed to work with a hard drive, as well as to treat viruses, banners, prepare the system for installing an operating system from scratch, etc. will do. The main thing is to put in the BIOS that the DVD drive is the first to boot, i.e. it is from it, and not from the hard disk, that you need to boot. Probably, many who independently installed the operating system either from a disk or from a flash drive know what this is about. If such a disk is loaded quite successfully, then the problem should be looked for in the installed operating system, namely: in drivers, as well as in software products that can somehow change the system configuration of virtual and physical optical drives. Remove all dubious software for burning, copying DVD discs, and also check in the device manager whether your drive is correctly identified or not. Of course, it is almost impossible to describe all software malfunctions within the framework of one article, but you can give universal advice: do a system restore.

Secondly, if the drive refused to accept the boot disk, then most likely there is a hardware problem. Often the whole solution to the problem comes down to the fact that it is necessary to clean the focusing lens. Dust getting on this lens prevents the laser head beam from transmitting the signal reflected from the DVD disc normally. If at any stage of operation this led to read or write errors, then one “fine” day, the drive may simply refuse to read a completely blank and new disc. The most correct way to solve such a problem is to clean the focusing lens.

The Truth About Cleaning Discs

Now the so-called cleaning discs have become very widespread. The idea of ​​such discs is certainly good, but the technical execution is not always acceptable. Some samples can generally, instead of being useful, simply “finish off” the sensitive mechanisms and optics of the laser head. Also, improper use of cleaning disks can lead to the fact that the user himself will simply finally “finish off” the drive. Instructions for such discs are often written either in English or in Chinese, which makes understanding the principle of operation, purpose and use of such a disc simply inaccessible to a Russian-speaking person. The main mistake of users is the incorrect application of cleaning fluid. As a rule, it is necessary to apply it only to certain cleaning bumps, and very little, placing the disc at an angle of about 45 degrees relative to the horizon. An excessive amount of this liquid simply floods the laser head, making reading information virtually impossible.

If we talk about Chinese cleaning discs from the category of 100-150 rubles, then their purchase will not be justified both from the practical and from the economic side. And if your problem is not in the lens, then this is money thrown to the wind. To protect the reputation of cleaning discs, we note that new non-contact cleaning discs have now begun to appear. Their main difference is that they work like wind turbines, that is, they blow through the laser head without direct contact. It is these cleaning discs that we recommend purchasing without fear of damaging the sensitive elements of the optical drive.

How to clean a DVD drive without a cleaning disc

Many master repairmen, although they themselves sometimes recommend the use of cleaning discs, but never use them. The cleaning disc is a solution for novice users and housewives. You can clean the drive much more professionally and better only when you take it out of the laptop and disassemble it. To disassemble the drive, you do not need any complex equipment and conditions. All you need is a table, a set of screwdrivers, a paperclip, a needle, a syringe, ear sticks, and isopropyl alcohol.

How to remove a drive

First, you need to turn off the laptop. Turn it face down, remove the battery.

No matter how ridiculous and unreliable it may seem, the fact remains: on all modern laptops, all fastening of the drive to the laptop is done with the help of 1 screw. Take a thin Phillips screwdriver and remove it.

Also this way you can take it into service when you urgently need to pull out the disk, but the electricity was turned off and the battery is low. After threading a needle or a paper clip into the technological hole, the drive will obediently open, and you can pull it out completely by pulling on the disc tray.

How to disassemble a drive

Turning the opened optical drive face down reveals the rear panel cover, which hides many important elements of the laser system.

You remove the 4 retaining screws, and the cover will obediently be removed without the slightest effort on your part. After removing the cover of the rear panel of the laser drive, we have access to the back of the laser diode, as well as the optical system.

Then you can put on the cover, and also tighten the 4 fixing screws.

How to clean a focusing lens

The lens is very sensitive to touch, so it is better not to touch it again with your hands or tools. For starters, you can try to limit yourself to purging from a can of compressed air.

If this does not help, then we recommend using an ear stick previously moistened with 90% isopropyl alcohol to wipe the lens. The second dry and clean end of the stick must remove the remaining alcohol. Remember that it is simply unacceptable to use cologne, moonshine, vodka for these purposes. You will only do harm. Isopropyl alcohol evaporates quickly, is relatively non-toxic, and does not leave marks on glass and lenses, which is very important within the framework of the technical task. Then it is necessary to dry everything again from a can of compressed air. It remains only to assemble everything, insert the drive and screw in the mounting screw. Assembly is simple and intuitive.

Finally, we note that in some cases, the breakdown still cannot be eliminated, since it can lie in a burned-out LED laser, in worn-out mechanics, in burned-out driver microcircuits, etc. Therefore, the last repair option is to completely replace the DVD drive.

muzhik-v-dome.ru

Do-it-yourself dvd drive repair

How to repair a CD-DVD drive yourself?

it short story with pictures of how you can revive a CD-DVD, and probably a Blu-ray drive, without resorting to expensive professional help. There are several common causes that can lead to complete or partial inoperability of the drive. The elimination of these causes is not a repair, but rather a maintenance of the CD-DVD-ROM, and may well be performed by a user who has some skills in working with electronic equipment. Read more at oldoctober.com

The most common causes of drive failure.

1. Deterioration of the drive belt (belt).
2. Increased friction in the loading mechanism.
3. Dirty laser lens.
4. Reduced laser efficiency.

To eliminate any of these causes, partial disassembly of the drive is required. The design of the drives may vary, so the accompanying pictures should not be taken absolutely.

Tools and materials.

For preventive work we will need the following tools, materials and accessories. oldoctober.com

1. Stationery clip.
2. Phillips screwdriver.
3. Medium sized brush.
4. Coarse calico (cotton fabric).
5. Silicone grease SI-130.
6. Belt.
7. Cleaning cloth.
8. Thin screwdriver.
9. Tweezers.

Begin. Disconnect the cables from the drive and unscrew the fixing screws. We take out the drive from the case of the system unit.

Disassembly.

Disassembly of any CD-DVD drive begins with the extension of the tray. To pull out the tray, you must first make a simple fixture from a paper clip.

Carefully, inserting the end of a paper clip into the technological hole on the front panel of the drive, we feel for the part of the mechanism that is responsible for blocking the tray. This part is located strictly opposite the hole. We press it and the tray extends slightly. Now it can be pulled out with your fingers.

We press the latches securing the front panel of the drive. First, we squeeze one of the side latches.

Then, we press the latch located at the bottom of the drive, and the other side latch.

We put forward the front panel, unscrew the four Phillips screws and remove the metal casing panels.

We press the latches and separate the tray from the main mechanism.

Thoroughly clean the mechanism of dust and dirt with a brush. If the old grease is heavily contaminated, then remove it with coarse calico and apply new grease.

We replace the worn out belt with a new one. Then we wipe the belt and the inner surfaces of the pulleys with a cleaning cloth or coarse calico soaked in alcohol.

Wipe the laser lens with a cleaning cloth. Dust deposited on the upper surface of the lens may not be visible to the naked eye, but it is almost always present there.

If the drive is very old, or known to have had too many discs written to it, and there is a read or write problem, then you can try to increase the laser current. This rather delicate operation requires patience and can take quite a long time. Do not start this procedure if your drive simply does not read a few old discs or discs recorded on other people's drives. This can be caused by a lot of different reasons, and the value of the laser current here is in 38th place.

It is best to adjust the laser current when the drive is in a semi-disassembled state.

To run the drive without the shroud and front panel, you will have to remove the front wall of the disc tray.

Somewhere on the carriage with the installed laser there is a small-sized potentiometer, the position of the engine of which determines the laser current. The location of this potentiometer depends on the design of the drive.

Before turning this screw, be sure to sketch the position of the slot in order to have a reference point, and in general, so that in case something happens, we can return it to its original position.

Turning the screw 10-15 degrees first in one direction and then in the other direction, each time we check the quality of reading in some program, for example, Nero DiscSpeed.

It is only desirable to check on several types of media at once, for example, CD-R and CD-RW or DVD + R, DVD + RW, DVD-R, DVD-RW, etc. It's probably not necessary to check all supported media types, but check at least the ones you use all the time.

Multi-purpose universal drives are rather compromise products and therefore they often read some types of discs better, and some worse. For example, by increasing the laser current, you can get perfect CD-R reading and make half of your CD-RWs unreadable.

Assembly is not difficult, except for one moment. When inserting the tray into the loading mechanism, you need to align the latch of the loading slider with the guide slot located at the bottom of the tray.

The slider is usually spring-loaded, so you need to fix the slider in the correct position using tweezers or other suitable tool before inserting the tray into the guides. In the photo, the position of the slider is fixed with an awl.

If, quite by chance, you have at your disposal a small set of belts of different diameters, then you just need to choose the right copy. If there is no such set, then you will have to buy a belt.

And although the era of video and audio tape recorders has passed, you can still buy rubber belts in assortment on all kinds of radio markets.

When buying a belt, you need to pay attention to several of its parameters at once, such as: cross-section, diameter, elasticity and quality of the vulcanization of the rubber from which it is made.

The section of the belt can also be determined by eye, since the probability that you will be able to find a belt of a strictly corresponding section is small.

The diameter of the belt can be determined by attaching the old belt to the new one and making sure that the diameter of the new one is slightly smaller than the old one.

Elasticity can be measured using an improvised stand, like the one in the figure.

I usually check the properties of the belt by touch without any dynamometers.

The quality of rubber vulcanization can be determined by color and tactile sensations. The color of the "wrong" rubber is deep black, and the surface is smooth and highly reflective. While the "correct" rubber has a slightly grayish tint and a more matte finish.

Also, the quality of rubber vulcanization can be determined by the recovery time of the original size. For the test, you need to strongly stretch the belt with your fingers and very quickly drop it flat on a flat surface. The faster the belt takes its original size, the higher its quality. If you can notice by eye how the diameter of the belt changes, that is, it seems to shrink, then such a belt will not last long and it is better not to use it at all. However, it is not a fact that you will find a high quality belt in the bazaar, and even exactly the same as required. Therefore, for lack of a better one, you can buy what is, but adjusted for diameter, cross section and elasticity.

And so, all these four parameters affect the properties of the belt. When choosing a belt, you need to consider all of them. If the cross section of the belt is slightly smaller, then you need to choose a slightly shorter belt and vice versa. If the quality of vulcanization is low, then you need to choose either a slightly larger section or a slightly smaller diameter.

If the belt is pulled too tight, it can lead to jamming or premature wear of the disc loading mechanism. If the belt is too loose, it can cause it to slip relative to the engine pulley.

If there are several belts with similar properties in the market, then it is better to immediately buy several different ones in order to choose the most suitable one at home. The price of a belt for a CD-DVD drive can range from $0.3 to $0.7.

related topics.

Reducing the noise of the computer system unit.

How to disassemble and lubricate the fan if it rumbles.

Installing Skype on PC-586.

oldoctober.com

Cleaning the DVD drive

As I wrote earlier in other articles, the biggest problem for a computer is dust. It is clogged wherever possible in such quantities that sometimes you are simply amazed. The DVD optical drive is no exception.

Dust, if the device is not cleaned, affects the operation of the drive tray, reduces the accuracy of the laser mechanism and affects the quality of the clamping mechanics. In general, a DVD drive should be cleaned at least once a year. Ideally, once every six months.

To clean and maintain your DVD drive, you will need lubricant, cotton swabs, and alcohol. After removing the DVD drive from the system unit, you need to remove its front panel. First of all, you need to pull out the drive tray. This is done with the help of any long and thin object (needles, paper clips, a piece of wire 3 cm long).

There is a small hole on the front panel of any DVD drive (item 2 on the bottom photo). Behind it (on the inside of the panel) is a mechanism for manually opening the tray. It is necessary to press this mechanism with a little effort through the hole and the tray will extend 1-2 centimeters, after which it can be pulled out manually to the end.

Next, remove the dust cover from the tray. To do this, turn the drive over and, bending the cover with your fingers, pull it down. On the cover, as a rule, there are two latches (item 1 on the bottom photo) and two guides on which the cover is held. It comes off without much effort.

Next, you need to drown the latches on the front panel. There are usually four (two on the bottom, two on the sides), or five (two on the sides, three on the bottom). After removing the front panel, the bolts (4 or 5 pieces) on the bottom cover of the DVD drive are unscrewed and the cover is removed.

If a DVD player breaks down, you don't have to throw it away or take it to a workshop and pay money for repairs. You can disassemble and even repair the device with your own hands.

The device and principle of operation of the DVD player

The player consists of a case with a disc tray. On the front panel of the case there are: a status display, player control buttons, on some models there may be connectors for connecting a microphone, headphones, a flash drive. Inside the case, everything is much more interesting.

Briefly about the main components of the device.

CPU

This is the main element of the player. It consumes electricity from a switching power supply.

Laser Reading Head

It is used to read information from the media. A wide flexible cable connects the reading head to the main board. All disc media has a mounting track that is required for proper operation. It is located in the center. When a disc is loaded, the laser moves to the center to read that track. If the reading was successful, the presence of the disc is established, and only after that the rotation motor is turned on, and the disc starts playing.

Spindle drive motor

The motor communicates with the processor through a driver. The disk rotation speed depends on the processor signals.

Driver

This is a microcircuit that receives commands from the processor and controls the operation of the spindle drive motor, laser lens focusing coil, laser reader movement motor, tray loading and unloading motor.

Is DIY repair possible?

“So many devices and wires! I'd better take it to the workshop!" - you will say with horror, clutching your head. But! Don't rush to spend money. There are such breakdowns that can be easily identified and repaired with a conventional screwdriver.

If the player does not turn on

There could be many reasons for this. Consider the most elementary and common. Let's remove the cover of the player and diagnose the power cord for internal damage. To check the operation of the multimeter, turn it on to the resistance measurement mode. We connect the probes to each other. If the device is working, zeros will appear on the display. We connect the open probes to the cord. One probe to the cable contact at the junction with the board, the other in turn to one of the plug contacts. If the ohmmeter outputs up to 3 ohms, the wire is undamaged. If more, then there is a breakthrough in the core, and the cord must be replaced. If the multimeter does not respond in any way, then the contact on the plug and on the opposite end does not belong to the same core of the electrical wire. It is not recommended to use the multimeter in dial mode, as it works in the range from 0 to several hundred ohms. The next step is to inspect for dust and swollen capacitors. We clean the dust, change the capacitors. If no visual problems are found, and replacing the wire does not change the situation, take the player to a workshop.

The video below shows how the multimeter works.

How to ring a wire

If discs are not readable

Consider the main causes of failure and how to deal with them.

Head failure

Causes: the laser head is dirty or the laser is out of order.

The contaminated head is blown with compressed air using a conventional rubber bulb. The objective lens is wiped with a cotton swab moistened with alcohol. Solvents must not be used. You need to wipe it very carefully with light movements. If cleaning is not enough, the head must be replaced.

Video cleaning

Replacing the laser head

Patch cable fault

The train often breaks at the folds. We disassemble the player in the same way as when servicing the laser head. Carefully pull out the cable from the plugs. We examine. If there are visible breaks along the edges, and you do not want to change the cable completely, we make a preliminary repair. Trim the damaged area with scissors. We remove the insulation layer with a knife or blade so as not to break the metal strips. If it doesn’t work out neatly, then you can try to remove the insulation with a medical needle or zero sandpaper. The width of the removed layer should be the same as that of the cut piece of the plume. Remove the blue plastic end plate from the trim and similarly glue it to the updated edge of the plume with super glue.

Video loop recovery

Now, when visually the cable seems to be intact, we call its contacts. We attach one probe to the contact from one end, and the other in turn to all the contacts from the other end. We do the same on the other side of the loop. Each contact must call with one contact on the other side. If the contact rings with several, then there is a short circuit in the loop. If the contact does not ring with any other, then there is a break in the loop. In both cases, the loop cannot be used. It needs to be replaced.

Engine malfunction

If the motor rotates unevenly or does not rotate, then it must be replaced along with the nozzle.

Replacing DVD Engine with Video

If the tray does not open

When the cover of the player is removed, turn it on and press the eject button. Since the tray itself is not able to move forward, you need to push it slightly. But do it carefully so as not to get electrocuted. The lid will slide out and disconnect the player from the network. We take a stick with wound cotton wool and moisten it with alcohol. We wipe the rails of the tray. We press the button. If the problem is not fixed, we unscrew the necessary screws, remove the strips, plastic covers and get to the belt.

We change the belt and collect everything back. The video below shows a detailed replacement of the computer drive belt. In a DVD player, we work in a similar way.

Cleaning, lubrication, belt replacement

If the player does not see the flash drive

Most flash drives are originally formatted as NTFS. You need to insert a USB flash drive into a computer, copy the necessary information to HDD, right-click on the flash drive and select "Format". Next, select the FAT 32 format, agree that all data will be lost and click ok. If the DVD still does not see the flash drive, then the problem is in the electronics: the microcircuits may be damaged or the power supply in the wires or loops may be broken. It is worth turning to professionals.

Is it possible to flash a DVD player

Updating your device won't get rid of all your problems. Firmware can Russify the player. He will produce films bigger size, errors in reading supported formats will be eliminated. But the player will not be able to read formats that were not supported before. Therefore, if the device works without lags, do not update it.

In order to find out if it is possible to flash your DVD player, you need to carefully read the device model on the back cover. Go to the official website of the manufacturer and see the firmware for this model. If they exist, then download latest version on a computer, burn it to CD. We start the disc in the player. When the update is completed, the startup screen will appear on the TV or player screen, and the disc tray will automatically eject.

Complicated breakdowns

In addition to problems that any user who knows how to work with a screwdriver and pliers can fix, there are equally common, but more complex problems:

• display backlight not working
• sound distortion;
• no image and sound;
• no picture or sound;
• karaoke mode does not work;
• there is no color image;
• complex mechanical damage, including water ingress;
• failure of the power controller;
• microchip failure.

There are many manufacturers of DVD players. The principle of operation and the main elements of the devices are the same. Therefore, the repair of players from different manufacturers is similar. If you have a desire to try to repair the player yourself, go for it. Perhaps you will succeed, and you will be able to help your friends another time. Or maybe you will like it so much that you will be engaged in radio engineering and open your own business.