Modern cordless phones (in everyday life they are often referred to as cordless phones) he settled permanently in offices and many of our apartments. Some devices are not only meet - for every taste and color. But here's the problem - they are more likely than ordinary (disc) fail. What are the causes and what are the different methods of repair cordless phones, says the author of this article.
Cordless phones, undoubtedly, have many advantages. However, their inherent and many the disadvantages. The benefits can be attributed, in particular, the lack of connecting wire that allows you to talk when you remove from base unit at a distance of two miles for phones operating in the range of 900 MHz and up to 200 meters - for phones operating in the range 20…49 MHz. What on the downside, one of them is the dependence on power supply. When absence of mains voltage (i.e. if you cut off the power) to use the phone you can't. You need to be near the base the unit was a socket, as the wire network adapter is usually short.
Getting to the review defects occurring cordless phone, let us say at once: up to half of the failures are caused by owners of vehicles. For example, if you take the phone with wet hands or use the bathroom, then eventually it will inevitably lead to oxidation of the conductors of the Board of the tube, the appearance of leaks in the narrow gaps between them and the refusal to work. Usually in this case it is enough brush rinse charge tube from the conductors. Do not forget isolate the battery. Than rinse? For example, I use the solvent. Alcohol and gasoline it is good to wash cannot charge. It happens that washing does not help. Then you must restore oxidized conductors.
Quite common defect associated with the drop tube. As a result can be formed microcracks, search which is a very complicated matter. In pipes cordless phone to reduce the size using double-sided printed circuit boards installation. The wires they are connected by metallized holes. These compounds too often torn. To detect such a defect is extremely difficult. A little trick - with the destruction of the metallization she changes colour, becoming darker…
Browse to the battery. If it is discharged to a voltage below 3 V, tube is not included. Advice to the owners: if you permanently leave, it is best (for fire safety) to switch off the phone from the mains. But never forget to switch off and the battery pack in the handset, otherwise it will run down, and this affects her life.
Let's say you did forget to disconnect the battery pack. Charge it again, putting the handset on the base unit, is not likely to succeed. Why? Yes, because the charging current is too small to awaken the "sleeping" batteries. However, not need to run to the store for new ones when you have the option to restore the old. Disconnect the electrical connector from the base telephone unit. Take two wires and connect them to the connector of the power supply and battery, observing the polarity. Hold for 20 to 30 s, and then safely insert all into place. Only do not forget to put the handset on the base for at least four hours to charge the battery.
Briefly about the buttons. When using the phones (especially manufacturing firms Panasonic) often appears such a failure: the buttons do not work, all harder to dial phone numbers. The reasons can be two. The first of them related to dirty contacts (e.g. fat), especially if the phone is in the kitchen. The second is the destruction of the graphite contact (Piglet).
In the first case, the defect can be eliminated by wiping noses and cost wool, soaked in alcohol. And the second will have to cut from aluminum foil small circles or squares and glue them to the patch. Best use a Polish glue SILIKON used for repairing cracks in aquariums. This adhesive after drying remains elastic. By the way, this method is widely use when repairing remote controls and calculators.
Technical illiteracy owners, their carelessness and partly the difference standards followed at the enterprises of foreign firms, also lead to defects in the devices. To cite an example. Power connector can to have a different Pinout. The phone company Panasonic positive output is on external pin of the connector, but they are Toshiba or Sony - internal. Although close to the socket of the specified polarity, the owner, not looking at her, very often confuses the PSU itself spoils the phone. And in response - the silence and the smell of burning. What happened? I just burned a stabilizer. Usually more as it goes. Of course, if not to be stubborn and try again connect the unit…
Author: M. Ryazanov, Moscow