Almost every apartment has home phone... With its help, you can contact a subscriber located almost anywhere in the world. However, telephones tend to break. The services of a specialized repair service are sometimes very expensive. What to do? Do-it-yourself phone repair.

You will need

• operation manual and documentation for your device, light cloth, screwdriver set, soldering iron, alcohol, swabs.

Instructions

First you need to study the operation manual and documentation for your device. You should only repair your phone if the warranty has expired. If the phone is still under warranty, then you should contact the service center, where the device will be repaired. However, it is also necessary to study the list of warranty cases to make sure that the breakdown of your device is eligible for free warranty repair. If the warranty has expired or your case is not eligible for free warranty repair, then you can proceed to self-repair your phone.

The operating manual always contains a list of some breakdowns, their symptoms and solutions. If your case is on this list, then follow the instructions given. If your malfunction is not on the list, then you will have to disassemble the device. You need to try to understand what the malfunction is. For example, if you spill any liquid on your phone, you should take it apart, clean it and put it back together. Unsoldered wires can also cause damage. So, lay a light-colored cloth on the surface where you will disassemble the device so that all small details and screws are visible on it.

Disconnect from the device telephone cable and power cable. If the tubing with the wire is detached from the housing, remove it as well. Flip your phone face down. On the back panel, you should see the holes where the screws are located. They can be closed with special plugs. Remove all screws. After that, find the plastic clips that hold the case. Open them and separate the case in two. Do everything smoothly, as thin wires can connect the two parts of the case.

Examine the insides of the phone. If you spill liquid, you need to disassemble the phone as much as possible. Carefully clean all microcircuits with tampons with alcohol, the plastic parts must be rinsed with plain water. Let all the details dry. Pay attention to all contacts. If you find disconnected contacts somewhere, they need to be carefully re-soldered. After that, reassemble the phone in reverse order and check its functionality.

I understand that you are already tired of detailed descriptions that you can do without. But the article is intended for a wide range of readers, I am sure that not all of them will understand even such "chewed" explanations. On the other hand, without a clear understanding of the operation of any device, it is impossible to become a qualified specialist in its repair. So you will solder the fallen off wires all your life. And so that your qualifications grow a little, let us finally move on to considering specific malfunctions. I decided to divide them into several groups - depending on the affiliation to any TA node. So, the first group:

Wires

There are not so many wires in the phone, but most of the malfunctions are associated with them. But before listing the faults, let's list the wires that are in the phone:

• Line cord
• Microphone cord
• Printed conductors

Line cord

This is the cord that goes from TA to telephone line... This cord, depending on the model, can have from two to five wires. But for work, 2 of them are enough. (Actually, there are 4-wire telephone lines, but we don't need that). These wires sometimes fail. And not only through the fault of the user: due to old age, due to manufacturing defects, etc. In most cases, it is quite easy to check them: pick up the handset and begin to bend the line cord strongly near the place where it goes into the telephone set (usually in this place the wires are grinded). If the sound appears, then disappears, or strong wheezing is heard, then you can assume that you have found a malfunction. Cut the line cord at a distance of 5-10 cm from the telephone set, strip it, disassemble the TA and connect the stripped ends of the wires to the TA terminals, being guided by the color of the wires. According to Russian standards, one of the wires connected to the line has White color and the other is red. But, of course, the colors can be different. If the TA worked normally after that, then you can safely collect it. If not, for fidelity, replace the line cord with a new one (And in general, in difficult cases it is better to change parts for known good ones. However, it should be remembered that among the new parts there are also defective ones). Well, if none of the above helped, then move on to the next element:

Microphone cord

A handset is a wire that goes from an SLT to a handset (actually, a handset is also called a handset). It is better to start checking with this wire, because it fails more often than linear. The method of checking and repairing is exactly the same as for the line cord, only you need to check it in two places - where the cord goes to the phone and where the cord goes to the receiver. This requires some experience: when you move and pull the cord, in some cases it will be difficult to determine where the wires broke - near the tube, or near the TA. But if you cut one end of the wire, and the malfunction has not disappeared, then you will have to cut off the other. Although, if possible, it is better to immediately change the cord to a new one.

A few words about the construction of the microtelephone cord. There are usually 3 wires inside it (less often 4). These wires are silk threads wrapped in very thin foil. Stripping such wires is not a pleasant occupation. But if your plant occupies several square kilometers, and there is no desire to run for a spare wire, then you will have to clean it up. This must be done very carefully - when stripping, it is easy to cut off the foil, and then there will be no contact. It is also inconvenient to hook the stripped wires to the contacts. Therefore, it is better to remove the terminals from the scraps of wires and put them on the stripped ends of the cord. Remember to ensure that good contact... A good wire in a microtelephone cord must have a resistance of 1-3 ohms. True, the resistance of some low-quality wires can go up to 10 ohms. It is advisable to replace such a wire, although if the resistance is stable (does not change during bending / stretching of the cord), then, in the absence of a spare cord, you can not change it - it will work. According to our standards, the wires have colors that correspond to their purpose: red - microphone (MK),white - microphone / telephone,green - telephone (TC).

Some "experts" quite often confuse white and red wires. In this case, the TA will work, but the audibility will be much worse. Therefore, you should always check that the wires are connected correctly. Although the colors may vary, this is fairly easy to do. On the TA board, all terminals to which the microtelephone cord is connected are usually labeled: M - microphoneMT - microphone / telephone, T - phone. See which wire is connected where, then check where the corresponding wires are connected in the tube. The wire that is connected to the terminal M, should only connect to the microphone,MT - connects to both the microphone and the phone,T - connects only to the phone.

Printed conductors

Phones are just made to be dropped on the floor. Someone is bound to trip over the line cord. If you have a fixed salary, then your main enemies are cleaners, builders and the users themselves. On the other hand, if you receive a piece-rate salary, these enemies turn into best friends. Anyway, after the fall of the device, cracks usually appear in the board. If dropped "specifically", then the cracks are clearly visible - there will be no problems with the repair. Just solder a piece of wire instead of the cracked printed track. And NEVER repair a conductor by simply soldering a crack. The board has already lost its rigidity - in the place of the break it will be in constant motion and very quickly your crack filled with solder will again cause a malfunction. Well, if the device only slightly hit the ground, then microcracks may appear, which are practically impossible to detect visually. Two options are possible here: the first - there is no answer from the station, the second - there is a response from the station, but the sound is sometimes interrupted. The first case is simpler, the second more complicated. But we will consider them in the section on troubleshooting in the spoken path.

Conversational tract

There are quite a few malfunctions of the spoken tract. As I have already said, the scheme "TA-72", which is shown in three modes above in the text, will be considered as an example. To check the spoken path, the telephone receiver, the diagram of which was described above, would be very useful to you. But if you do not have such a tube, then at least find a working telephone capsule (or telephone set), and connect two wires to it, a meter and a half long. So, let's begin...

There is no answer from the station (the phone was answered, and there was silence)

The first step is to check the health of the telephone line. To do this, disconnect the telephone from it (if there are more than 2 wires in the line cord, then be sure to remember which wire is connected to which terminal). Connect the handset to the line. If you hear the station's answer in it, then the line is operational. Disconnect the handset from the line. We will divide further actions into several stages.

Step one: checking for closure

Connect the SLT to the line. Connect the handset to the line. If there is no answer from the station in the receiver, or the signal is very quiet, or short beeps are heard, then somewhere in the TA being repaired, something closes. To be sure, repeat these operations 2-3 times. (When you gain experience, it will be enough even once, but for now all the actions should be repeated 2-3 times, because even when performing such simple operations, you can make a mistake). If there is no closure, then you can proceed to the fourth step. The short may be caused by improperly connected line-cord wires (if there are more than 2), so be careful. If this check was performed with off-hook, then go to the third step, otherwise go to the second step.

Step two: finding a short circuit in the "on-hook" mode

So, in TA there is a closure. What to do? We disassemble the TA (first, disconnect it from the line so as not to "torment" the PBX). The TA is in the "on-hook" position. To exclude the possibility of incorrect connection of the wires, we will disconnect all unnecessary ones, and leave only those that go to the telephone line (in the diagram they are indicated by the letters ab and connected to pins 1 and 2). To eliminate the likelihood of a short circuit in the bell circuit, simply turn off the bell by disconnecting any of its wire or jumper on pins 2 and 3. It remains to check the RP contacts 1, 2 and 3. They must correspond to the position indicated on the diagram in the "receiver is down" mode. When you gain experience, then many of the described operations can be omitted, because some malfunctions are extremely rare. But if you have never been involved in the repair of equipment before, then it is better to follow all the steps described in sequence. And gradually you will come to understand what you are doing and why. Theoretically, there is a possibility that the short circuit occurred inside the line cord, but in all my many years of practice this has never happened. and

We again connect to the TA line and the tube. (You can not assemble the TA for now, but simply press the levers with your hand and hold them in this position - the device will be in the "on-hook" mode). If the station still does not answer in the receiver, then the short circuit has not been eliminated. Then carefully inspect the board from the back side and once again check that all wires are connected correctly. Although the closure in the "tube is down" mode is rare. Most often, the short circuit occurs when the TA receiver is off the hook.

Step three: finding a short in off-hook mode

Actually, in this mode, short circuits do not happen very often either. But it happens. Usually NN is to blame for this. Look at the diagram: if, for some reason, after dialing a digit, the disk did not return to its place, then the contacts NN 3-4 and / or 1-2 may remain closed. In the latter case, it will not be a short circuit, but you will not hear the answer from the station anyway. In some cases, the cause of the short circuit may be an RP. It happens that his contacts get stuck in the "intermediate" position. Therefore, attention should also be paid to the toggle switch. A short circuit can be caused by a "breakdown" of one of the diodes VD1 or VD2, but this is a very rare occurrence. More often there is a short circuit in the microtelephone handset: usually unscrupulous craftsmen screw the cord terminals somehow and then they close together. It happens that a non-standard microphone is installed, which closes the wrong one with its body.

Step four: check the signal flow

The most common malfunction of the spoken path. But not very difficult. So, we begin to check the signal flow: the TA must be in the "off-hook" mode and the telephone line must be in good working order. First, we connect with a tube to the XT1 and XT2 terminals on the TA board. If there is no answer from the station and the line cord is correctly connected, then this cord is faulty. Replace the cord. If the cord is serviceable and correctly connected, but there is still no answer from the station, then you have not read the previous paragraphs. Go back to the first step. We figured out the cord - the station's response appeared on the terminals XT1 and XT2. Move on. We hook the first "crocodile" of the tube to the XT2 terminal, and the second to the XT6 terminal. If the station does not answer, then the LV is faulty. If everything is normal, then we check the "other half" of the spoken path. For this: the 2nd "crocodile" is hooked to the XT1 terminal, and the first - to the XT7 terminal. If there is no answer from the station, then the RP is to blame (I think you will deal with him). If there is a response from the station, then we check the signal at the terminals to which the wires coming from the telephone receiver are connected. Let me remind you: there are usually 3 of them.

The check is as follows: we hook up the first "crocodile" to the terminal where the microphone is connected (M). With the second "crocodile", alternately touch the terminals MT and T. In both cases, the station's response should be heard. Then we connect the 1st "crocodile" to the MT terminal, and the 2nd - to the T terminal. Here, too, there should be a response from the station. If in at least one case there is no response from the station, or it is much quieter than in other cases, then the transformer is most likely to blame. Then let's move on to the sixth step. Otherwise, we check the handset:

Step five: check the handset

To do this, we first disassemble it. Then we check the signal, but already at the other end of the microtelephone cord. The check is similar to that described above. Only if in this case there is no answer from the station on any of the contacts, then the microtelephone cord is faulty (provided that there are signals on the TA board). You should also take into account the fact that in some models of TA the station's response may be absent due to the absence or malfunction of the microphone. The microphone is tested simply: disassemble your pipe and insert the "suspect" microphone into it, then connect to the telephone line. If there is a response from the station and the volume is the same as with your microphone, then everything is fine (this is another plus in favor of a pipe fitter - if necessary, you can take a known working MK or TC from it and put them into the tested device). So, the microtelephone cord is working, the microphone is working. But the telephone doesn't work. We put the microphone in place. We unscrew the wires from the TC and connect the "crocodiles" to them. If there is no answer from the station, then the wires running inside the TA tube are faulty. If there is a response from the station, then the TC is faulty. We replace defective parts.

Step six: check the transformer

If there is no response from the station at any of the terminals M, MT or T, then the transformer should be checked. Hook the "crocodiles" to the terminals where there is no response from the station, and wiggle the transformer with your finger. If a station response starts to appear, then a malfunction has been detected. In this case, the leads of the transformer should be well soldered, both from the side of the printed conductors and from the side of the parts (where possible). You should also carefully inspect the printed conductors going to the transformer - if the TA was dropped, then it is in these places that microcracks most often appear. If there are doubts about the health of the tracks, then it is better to duplicate them with wires, soldering them over the tracks. If all this does not help, then there is an open circuit inside the transformer. Looking for it is an unpleasant task, so in this case it is better to replace the transformer.

But there are other malfunctions of the spoken tract:

You are not heard or heard poorly

Main reasons:

• Microphone defective
• Defective transformer

Severe crackling or rustling in the pipe

Main reasons:

• Microphone defective
• Microtelephone cord defective
• Defective RP
• Defective LV

You are hard of hearing

Main reasons:

• Faulty TC
• The wires of the microtelephone cord are interchanged
• Defective transformer
• Fritter defective (diodes VD1 and / or VD2)

Sound is interrupted during a call

Main reasons:

• Defective transformer
• Microtelephone cord defective
• Defective line cord
• Faulty wires inside the tube

Notes:

• Quite often, the cause of poor audibility and / or signal interruption is the wires laid inside the handset and going to the TC. Therefore, even if it seems to you that they are in perfect order, replace both wires, especially if the TA is old and the wires are single-core.
• Poor audibility can be caused by deflection of the TC membrane. In this case, it is not necessary to change the TC. Just unscrew the TC cover and turn the membrane over (stick it to the magnet with the other side). In most cases, hearing is normal.
• Poor operation of the spoken path (you are hard to hear and / or you are hard of hearing) may be caused by the use of non-standard parts (for example, if our TC is installed in some imported phones). In this case, replace the parts with standard ones. Otherwise, you will not achieve normal operation. (You can, of course, change the TA scheme, but this requires certain qualifications).

Dialer

Many malfunctions, including malfunctions of the voice path, are associated with the dialer. And most of these malfunctions are caused by dirty contacts. And to clean the contacts, we need an eraser (eraser). Telephone operators call it "dry alcohol". They drink "wet" alcohol, but they need to clean the contacts with something. But in fairness, it should be noted that it is better to clean contacts with an eraser than with alcohol or a fine "sandpaper". Alcohol is not always able to clean up heavy dirt, and the "skin" leaves scratches on the contacts, and this is not good for the contacts.

So, we cut out a small wedge from the eraser and push this wedge several times between the LV contacts. Note that it is better to use a gray eraser, which is used by professional draftsmen. Colored erasers for schoolchildren are less suitable for these purposes. The main LV contacts are impulse contacts. The rest need not be cleaned. However, cleaning will not hurt anyone. If you have time, it is better to clean all contacts. After cleaning with an eraser, moisten an old toothbrush or brush with alcohol and clean the contacts again. If there is no alcohol, then you can clean it with a dry brush - the main thing is to remove the crumbs from the eraser from the contacts. Well, if anyone has not yet understood how all this is done, see the figure:

However, LV malfunctions do not end there. But repairing dialers is a separate big topic. It is possible that I will return to her later. In the meantime, let's stop at this.

Call

Let's start, as always, with the wires. Let's look at the diagram in the "on-hook" mode. For the bell to work, a jumper must be installed between terminals 2 and 3. This jumper is not always installed, but the bell works. In this phone model (and in many others), this is possible if the line cord consists of three (or more) wires. In this case, contact between terminals 2 and 3 is made through the cord wires that are tied together at the telephone jack. This option for connecting a call is shown in the figure:

It is clear that with such a switch on, a break in the middle (green) wire will not prevent you from dialing and talking. But the call will not work in this case. If one of the three wires is cut off, then it is not necessary to change the whole cord - it is enough to set the jumper in accordance with the diagram and the bell will work. And one more thing: it happens that a jumper is installed in the phone, and at the same time the cord has three wires. If in this case you turn them on as shown in the figure, then everything will be fine, but if you connect the middle wire not to the top, but to the bottom, you will get a "purely concrete" short circuit... And in some other models, short circuit can be obtained without any jumpers. Therefore, be careful when connecting the line cord.

We still have three candidates for the inadequacy: RP, capacitor, and the bell itself. With RP, everything is clear (we will consider some special cases later). The capacitor breaks down very rarely (in all my practice it was five times in total). But, if there is a suspicion, it is better to replace it all the same.

Now about the call itself. If you forgot its device, see the description above. The following troubles can happen to the call:

• Quite often, users turn down the ringtone volume and forget about it. Therefore, the first step is to turn the volume control.
• There are many additional services on modern PBXs. One of them is restricting incoming calls. Some users sometimes accidentally activate it, and no one can call this number, although the TA is operational.
• Open circuit in the coil or interturn short circuit. Rare but real malfunctions. The coil resistance should be around 1-2 kΩ.
• But the most common faults are mechanical. First, check if the anchor is moving freely. If at least a slight resistance is felt when the anchor moves with your finger, then the bell may not work at all or work every other time. In this case, you can try to lubricate the axis on which the armature rotates. If this does not help, then most likely the axle is bent. It is not always possible to straighten it without damaging its attachment to the bell base. Therefore, it is better to replace the call with a new one. On some models, the permanent magnet moves away from its normal position over time and clamps the armature. In this case, simply push it back into place. When driving, the anchor should hammer on both cups. In this case, the sound should be sonorous. If this is not the case, then adjust the position of the cups by rotating them in either direction. After adjusting, tighten the bolts that secure the cups well and check again as when tightening the bolts, the cups may move.
• And finally - a completely exotic malfunction. I ran into her only once. Everything is fine, but the call works every other time, or even after five. For a long time I was looking for the reason. It turned out that the permanent magnet was demagnetized. Of course, it would be easier to replace the bell, but in my heart I am an experimenter, so I did the following: I pulled out the magnet from the bell and stuck it on a large magnet from the speaker for several days. After that I put the magnet back in place - the call worked like new.

Conclusion

For dessert, a few general tips and rare faults. Although, if you just skimmed through this article (and I'm almost sure of this), then there will be only one advice - read it carefully. Many people think that nothing bad will happen if you skip a few lines. But this is not the case. Sometimes the answer to a question of interest to us can be found in one phrase or even a word. It happens that the book does not contain a direct answer, but some expression prompts us to the right thought.

As for rare malfunctions, we will give here only one, but very tricky one:

Poor audibility. But if the same TA is connected to another line, then it works great. Line? But if you connect another phone to this line, then it also works great. Well, how do you like the task? Any thoughts? I spent a lot of time looking for the causes of this anomaly. But in order to understand everything, let's first consider the device of standard Soviet telephone jacks and plugs:

Now, of course, you have already found the answer to the question posed above. Well, for those who have not yet understood, I will explain. A capacitor is installed inside the telephone socket. It is needed to check the telephone line when the telephone is disconnected. When the plug is removed from the socket, the capacitor is connected in parallel with the line. If the plug is inserted into the socket, the plastic tab opens the lower contacts in the socket and the capacitor is disconnected from the line.

In our case, the plastic tab on the plug was broken and the capacitor did not disconnect from the line, so the audibility was poor. The other TA had a working plug, and it worked fine on this line. And a TA with a faulty plug worked normally on the other line, because there was no capacitor in the outlet. If you have a similar case, then just disconnect the capacitor - it is needed only by the PBX employees, not you.

And one more thing: you noticed that the line connects to the right contacts on the socket and to the right contacts on the plug, when viewed from the side of the bolts - this is the standard. If you want anyone to work on your line standard phone, then the connections should only be made in that order.

Well, that's all for now. I wish you good luck in mastering the intricacies of repairing various kinds of equipment ...

If your landline home phone stops working, it is not at all necessary to immediately contact the master. It may be possible to cope with the breakdown on our own.

However, it should be understood that not all phone models lend themselves to self-repair. For example, it is unlikely that without special skills and tools you will be able to restore the work of a smartphone docking station. With regard to wired telephones, the reasons for their breakdowns can be classified as follows.

Phone debt is one of the reasons for disconnection

So, the most common reason for the lack of telephone communication, no matter how trite it may sound, is late payment. Often, the subscriber disconnects from the telephone network automatically, and the notification about this may come with a delay.

Checking the telephone and cable

The next reason, by the way, no less common, is the technical condition of the telephone. So, in particular, it is necessary to check the condition of the telephone cable. It can become unusable if it is worn out at the place of the bend. He can also be harmed by pets. In this case, the cable must be replaced. If, for some reason, it is impossible to do this, the following procedure should be carried out.

It is necessary to strip the damaged area from the plastic sheath, exposing the copper wires. This must be done very carefully, as they are very fragile. After you have freed them from the shell, you need to twist the opposite ends of the wire together. Thus, you will restore the integrity of the cable for a certain period of time. The restored area will also need to be insulated with tape or protective tape.

In addition, the telephone itself may be faulty. It is undesirable to disassemble the phone on your own. Since inexperience, you can damage the microcircuit, which will be almost impossible to restore. However, if the buttons of the device simply sink in, such a nuisance can be completely solved by yourself. If the condition of the telephone and cable is not a cause for concern, a faulty telephone socket may be the reason for the lack of communication.

In order to find out it is necessary to disassemble it. By the way, there is no voltage of 220 volts in it. After you have removed the panel from the socket, you need to make sure that all contacts are connected properly. Lost contact can be returned to its place with a screwdriver.

One of the reasons for the failure of a home phone may be a banal non-payment. You can clarify the existence of a debt or report payment by service telephones indicated on the accounts, as well as in personal account on the site telephone operator... Please note that if your phone is disconnected for non-payment reconnect after depositing funds, it may take about a day.

To avoid this situation, pay your phone bills no later than 20 days from the date of receipt. Please note that if the payment was made after the 28th of the month, it will be credited to your account only the next. Do not forget that you can pay for the phone before receiving the receipt, after the 7th day of the month at any branch of Sberbank. To do this, it will be enough just to give your phone number.

Machine malfunction

Perhaps the breakdown occurred directly in yours. To check this, try reconnecting it, for example, at your neighbors, or connect another device to the existing wires.

If you have a cordless telephone, it is also possible that it is in the receiver and needs to be replaced with a new one. The less the handset holds “charging” outside the base station, the less power is left.

Understanding the wires

A telephone cable (usually white) runs from the general electrical panel to the apartment, where it is connected to a small telephone socket, and from it a separate wire leads to the telephone. Also, most modern phones are connected to the network. Check all connections: 220V socket, telephone socket. Perhaps, in one of the connection points, the cable simply fell out of its "socket". If everything is in order, it is worth checking the wire all the way from the telephone socket to - it may be torn or pinched. This happens quite often, especially if the cable is laid under the thresholds of the entrance to the rooms, there are children and pets in the apartment.

In the event of a rupture, this breakdown can be completely corrected on its own: the wires will need to be slightly cleaned and twisted again in pairs, and then fastened with electrical tape. At the same time, it will not shock you with a current, moreover, the polarity of the telephone wires is absent, which means that you can not be afraid to connect them incorrectly.

Other possible malfunctions

Here are some more of the most common customer complaints and how they can be resolved:

Crackle, rustle, interference... These are the "symptoms" of a telephone line problem. In this case, it is also worth checking all the wires, and if they are intact, contact the telephone company.

Poorly audible... Most likely, the problem arose in the dynamics of the device. If the phone is old, then the speaker is coal, and sometimes you just need to knock on the receiver. If the phone is modern and the volume is set to “maximum”, but you still can't hear anything, you will have to contact a specialist or replace the device with a new one.

The phone does not respond to button presses... Perhaps they just got littered. Try to remove the cover and wipe the button mechanism with alcohol as gently as possible.

Sources:

• how does the phone work

Almost every apartment has a home telephone. With its help, you can contact a subscriber located almost anywhere in the world. However, telephones tend to break. The services of a specialized repair service are sometimes very expensive. What to do? Do-it-yourself phone repair.

You will need

• operation manual and documentation for your device, light cloth, screwdriver set, soldering iron, alcohol, swabs.

Instructions

First you need to study the operation manual and documentation for your device. Repairs by yourself only if the warranty has expired. If the phone is still under warranty, then you should contact the service department, where the device will be repaired. However, it is also necessary to study the list of warranty cases to make sure that the breakdown of your device is eligible for free warranty repair. If the warranty has expired or your case is not eligible for free warranty repair, then you can proceed to self-repair yours.

In the operation manual, there are always some breakdowns, their signs and solutions. If your case is on this list, then follow the instructions given. If yours is not on the list, then you will have to disassemble the device. You need to try to understand what the malfunction is. For example, if you spill any liquid on your phone, you should take it apart, clean it and put it back together. Unsoldered wires can also cause damage. So, lay a light-colored cloth on the surface where you will disassemble the device so that all small details and screws are visible on it.

Disconnect the telephone and power cables from the machine. If the tubing with the wire is detached from the housing, remove it as well. Flip your phone face down. On the back panel, you should see the holes where the screws are located. They can be closed with special plugs. Remove all screws. After that, find the plastic clips that hold the case. Open them and separate the case in two. Do everything smoothly, as thin wires can connect the two parts of the case.

Examine the insides of the phone. If you spill liquid, you need to disassemble the phone as much as possible. Carefully clean all microcircuits with tampons with alcohol, the plastic parts must be rinsed with plain water. Let all the details dry. Pay attention to all contacts. If you find disconnected contacts somewhere, they need to be carefully re-soldered. After that, reassemble the phone in reverse order and check its functionality.

Tip 3: Where to call if your home phone isn't working

The home phone, it would seem, is gradually being replaced by the mobile one. However, stay-at-home people and lovers of long conversations still cannot do without stationary communication. Where to go for help if the phone suddenly goes silent?

You will need

• - access to the Internet
• - working telephone
• - mobile phone

Instructions

If the phone shows no signs of life, first of all, check all the wires yourself, as well as the places where they are connected. Chances are, the root of the problem is simply a malfunction of your telephone, and not a problem with the line. To find out, connect any other stationary device. This is probably lying around either you or your neighbors on the mezzanine. If this device is silent, then the problem is most likely on the line. If you have a parallel telephone, check its serviceability as well. Please note: if the connection problems coincided with windy weather or renovations in your home, then this is most likely a breakdown on the line. In this case, the test with the old phone can be skipped.

Now that you are sure of technical problems on the line, find out which company serves your telephone network... Find the phone of a single service center your operator - on the Internet or in receipts for telephone payments. Take advantage of your mobile phone or ask your neighbors for help if their phone is working. Tell the operator what city you live in, tell the number of your phone, in whose name it is registered and describe the essence of the problem.

The operator will accept your request for repair and will send a master to you, who must identify and fix the breakdown. Possible cause a broken phone can be a gap that the company is obliged to close completely free of charge. If the gap occurred directly, then you will have to pay for the repair.

On the day of the arrival of the master, you will have to postpone all your affairs and stay at home. If the breakdown is external, the specialist will call you on your home phone to make sure that the malfunction has been fixed. If damage has occurred on your territory, it is necessary to provide access for the master to your apartment. After a while, the operator should call you back to make sure your phone is working properly.

note

Unfortunately, not all companies providing telephone connection, work quickly. Do not be lazy to call back the service and remind about yourself.

If the phone is out of order, this is a huge problem. And from time to time there is a feeling that everyone is cut off from the world and thrown on an uninhabited island. The home phone has already become obsolete and losing its position. But still, every second resident has a home device, and everyone actively uses it. A home device does not have unpleasant qualities, such as loss of charging, does not freeze and breaks much less often. But still, sometimes you pick up the phone, and there is silence ...

Repair of a radiotelephone - We will talk about those malfunctions that can be eliminated even by a non-specialist, having detailed instructions... And you can find them here.

Hello dear visitors. In this post I will try to tell you in detail what you can do at home in order to bring back such a “toy” as a radiotelephone to life. Everything will be based on the example of the Panasonic radiotelephone, but other brands will be similar in many respects.

Of course, when it comes to the breakdown of the electronic part, this is the lot of specialists, but most often what fails is what many can do on their own, we read about how and what to do and see below.

Fast navigation through the article

Radiotelephone - buttons do not work

One of the common malfunctions of radiotelephones after long-term use is that some buttons, when pressed, stop working at all or require a lot of effort.

This usually happens with those buttons that are pressed most often, they can be easily identified by wear. This malfunction is akin to the same problem as in the consoles. remote control... And therefore it is eliminated in the same way.

But just do not think that it is enough to clean, rinse and that's it. This method is very widely described, but believe my many years of experience in the field of repairing remotes, it does not help for long, in 90% of cases for a week. For a quality repair, you will need to purchase something in advance, but more on that below.

Any repair begins with disassembly.

When disassembling an unfamiliar device, you do not need to rush, be careful, try to remember and, if necessary, write down / photograph / mark some nuances, for example, even the mounting bolts can be of different lengths in different places and they must not be confused. Mindfulness will help you put everything in place without error and you will not have any unnecessary parts.

But in this case, everything has already been described and photographed. Begin!

We disassemble the Panasonic radiotelephone

The owner of the phone complains that he stopped turning on, the reason is trivial, the buttons do not work. The photo clearly shows that the power and reset buttons are heavily worn out.

After removing the batteries, we find the fastening screws in the case and unscrew.

With a short and better not very sharp knife, you can also use an unnecessary plastic card or something like that, open the phone by applying a slight force down and to the side to unclench the latches, we try not to break them.

We pay attention to the wires, they do not need to be unsoldered, but you also do not need to tear them off.

The next step is to find all the screws securing the board and unscrew them.

And here are the nuances, we pay attention to how these metal terminals are installed.

Well, we got there, it's not difficult at all.

Separate the rubber mat with buttons from the board.

The board itself, the part that was under the rubber band, neatly with a cotton pad dipped in alcohol (you have to drive it to the pharmacy 🙂), wipe it from fat and other contaminants. Without fanaticism, there is no need to try to erase these black graphite conductors in the form of stars and other shapes. There were cases where sandpaper was used. We carry the gum itself under the tap and in warm water with soap with a cotton swab, or better with an old toothbrush, carefully wash and dry.

When everything is ready, the gum is washed and dried, we proceed to the repair. And here, for a high-quality repair, we need a repair kit for the remotes, you can buy it in stores with a radio engineering bias. The cost is usually no more than 100 rubles. A little later I will tell you about alternative methods.

This is what this repair kit looks like.

The material on the repair of the radiotelephone was filmed some time ago and now I cannot understand where the frames with the restoration of these buttons have gone. Therefore, I will show this whole simple process on an elastic band from the remote control. The essence is absolutely the same ... .. Apply glue to the buttons that need to be restored.

When all the necessary buttons have been glued in this way, we can start assembling. Already after 20 -30 minutes you can safely use it, but you can check it right away. As you can see, the phone turned on, the buttons work easily.

Other ways to restore buttons

If it is not possible to purchase a repair kit for the remotes, then you can do the following.

1) Find some foil, but only paper-based foil used in cigarette packs. Cut out small pieces with scissors so that they stick to the button without going beyond its size, if anything, just press down the piece of foil planted on the glue so that it squeezes down with its edges. Use either silicone glue, or one that is capable of glueing rubber, such as a moment, rubber, etc.

• Never use super adhesives in this matter (those in small tubes quickly freeze and glue your fingers wonderfully) When they freeze, they become brittle, and when you press the button, it bends and this glue begins to crumble, as a result, everything can fall off.
• Never use foil without a paper backing, it will also fall off

2) Perhaps there is some old faulty remote control, calculator. There, too, the same buttons are used, you need to carefully, thinly, cut off the desired layer with a blade in order to glue it where it is most needed.

These are standby options that can be applied, but it is better to find a repair kit.

Time to replace the battery

Well, for dessert! Cordless phones are usually powered by batteries that are charged from the base connected via an adapter to the network.

This chain, Battery - Base - Adapter, is another weak link.

Therefore, if your radiotelephone has stopped charging, pay attention to it. The contacts on the base, handset and battery compartment must be clean and free from oxidation.

Make sure that the power adapter is working properly, you need to measure the voltage at its output, it must correspond to the parameters of the adapter. You will need a multimeter for this. Often a wire breaks in adapters and this is not noticeable, the break is hidden under the outer insulation. How to find out the parameters, and choose the power adapter you can.

By measuring the voltage at the contacts of the base, those with which the tube is connected when it is in it, we can make sure that the power circuit in the base itself is working properly, the battery is charged through these contacts. If, with a working adapter, there is no voltage on these contacts, then the malfunction may be in it, in the base.

If the voltage comes out of the base unit, it should be equal to the total voltage of the batteries or slightly more. But the batteries do not charge, the reason is in the batteries themselves. There is also a small percentage of electronics malfunction in the phone board, there may be a charge controller, but this is for specialists.

You can check the batteries, for example, by substituting ordinary batteries in the handset instead. This is only true if the phone uses batteries of the same size. In some models, a block of several batteries assembled in one package may be used.

In this case, you will need to purchase a new battery of this type or an analogue.

That's probably all. Thank you for your interest in this project.