Televisions are standard household configurations, just like when you buy a cell phone, there are headphones, in addition to chargers. Visible televisions are integrated into modern renovations. Spacetime watching the show, unexpected discovery of anomalies, finding someone to repair it, master judging it as basic failure, what is the basic maintenance method for television? Read directly below。
Method of basic maintenance of television
1. Fake welding
(1) the false welding of televisions is one of the high frequency malfunctions of televisions, generally reflected in the fact that televisions are working at good times and bad times and that this error is also the main cause of this problem in televisions。
(2) when maintenance is performed, the circuit board can be turned over and the false welding points can be counted one by one; when the electrical current is larger and the temperature is higher, the false welding point will have a crack, which is a method of checking。
(2) the circuit board may also be flat, pressed somewhere on the circuit board with a screwdriver and an insulation bar, where there will be a significant change in the location when the pressure arrives, which will directly prove that the fake welding element is in the vicinity and then made. Welders are finally used for repair。
2. Capability damage
(1) if the electrolytic capacitor of the television is damaged, the tv loses its capacity altogether, or its capacity becomes smaller, with a slight failure; the leak is accompanied by a reduction or loss of capacity。
(2) in resolving this problem, check whether the electrical caps of the televisions are damaged or leaking, and then check whether there is a drumming of the caps before touching whether the electrolytic caps of the tvs have hot hands. If so, these three issues are revised in a timely manner。
Three, semiconductor pieces damaged
(1) if the semiconductor parts of the televisions are damaged, in general, the diodes and triodes of the televisions are short-circuited or open-routing requests, accompanied by a decrease in the heat stability of the semiconductors and a deterioration of the np knot properties。
(2) when examining the damage to the semiconductor parts of the television, the effects of electrical resistance on the pn can be ignored by means of road surveys using a universal gauge of the pointer, using a small barrier slot of the universal watch. Once the failure has been determined, the spare parts are replaced and the television is operational。
4. Damage to television integrated circuits
(1) if the integrated circuits of the television are damaged, no component can function normally, and there are two situations in which the integrated circuits are damaged, completely damaging and thermal stability is poor。
(2) when the integrated circuit is completely damaged, a new integrated circuit may be replaced; if it is suspected that the integrated circuit thermal stability is not good, the circuit will be cooled with waterless alcohol, the barrier will be delayed, or it will not occur, directly proving that thermal stability of the integrated circuit has failed, but new integrated circuits will also need to be replaced。
5. Television resistance damage
(1) the impairment of televisions generally results in the opening of circuits or the deterioration of the value of the barrier, where the highest rate of resistance damage is in the case of small resistance and high resistance, and the damage to intermediate resistance is very small。
(2) small-value resistance often occurs in case of damage, which is charred and black; large-value resistance has no trace of damage; therefore, emphasis is placed on checking the size of the resistance and replacing the corresponding type of television resistance。
The above relates to the basic maintenance methods of television, which, literally, should be less difficult to perform, with small apprentices able to cope with, and may also be maintained if users know about electricians. In case of a television failure, be patient, analyse slowly, check everything and do not detect problems, so that the root causes of the malfunction cannot be found. Reference can also be made to the introduction to colour television maintenance, specialized maintenance for outdoors and seconds! If you want to know more about your home, please keep your eyes open on your home after the sale。
Reproduced for retention: http://www. Wanshifu. Com (teacher)
