As a more representative and indispensable product of family entertainment, television plays a key role in many families, not only as an important means of getting outside information, but also as a way to help relieve the stress of work and learning, as well as to provide a channel for family reunion. However, the use of excessive time or inappropriate methods can cause some malfunctions in television products, so today's analysis is based on basic methods and techniques for the maintenance of television, which can be understood by interested friends in order to facilitate learning。
I. Maintenance of tv methodology
1. The incidence of false welding on television is a relatively large problem in the rate of failure on television. The false welding of televisions is manifested in the fact that they work in good and bad conditions, and the problem is most common when they shoot television with their hands, which is caused by the false welding of televisions. When you're doing repairs, you can look for fake welding points by flipping the circuit boards over, using this method to focus on larger currents, higher temperatures, a loop of cracks at its false welding points, and the second method is to flatten the circuit boards, press them somewhere on the circuit boards with screwdrivers and insulation sticks, and when you press them, the site changes significantly, which proves that the parts of the fake welding are nearby。
The damage occurred when the television was completely out of capacity or its capacity was reduced; there was a slight leak in the television; the television was also outaged or outaged, so that when the problem was resolved, it was possible to check whether the television was damaged or leaked, and then to check if there was a drumming, and then to see if the electrolytic of the television had a hot hand. The problems encountered in the maintenance of the colour television indicate that your television should be replaced。
3. Damage to semiconductor devices on television. The semiconductor damage to the general television is due to short circuits or openings of the two or three poles of the television. At the same time, thermal stability of semiconductor devices has decreased and the properties of the np have deteriorated. When checking for damage to semiconductor parts of a television set, measurements can be done using a table of all-purposes, using a small barrier to a one-size-fits-all scale in road measurements that ignores the effect of some of the outer barriers on the pn's blockage. In the maintenance of colour television, this method can directly detect tubes that have deteriorated characteristics, more precisely。
Damage to television integrated circuits. No part of the television integrated circuit can function normally when it is damaged, and there are two types of damage to the integrated circuit: total damage and poor heat stability. A new integrated circuit can be replaced when the integrated circuit is completely damaged; if it is suspected that thermal stability of integrated circuits is poor, the need to cool the circuits with waterless alcohol, the delay or non-acceptance of the failure may indicate a failure of thermal stability of integrated circuits. This will also require the replacement of new integrated circuits。
5. Television electrical resistance damage. The impairment of televisions can lead to the opening of circuits or the deterioration of the barrier value, with the highest rate of resistance damage in the case of minor and high resistance values, and very small damage in the case of intermediate barriers. Small-value resistance tends to be charred when it is damaged, with little trace when the high-value resistance is damaged. In the maintenance of colour televisions, such problems require the replacement of electrical resistance on televisions and the resolution of short circuits or openings on televisions。
Although most of the friends who use television products are not persons with a professional base of expertise in this area, and there has been no prior training in maintenance or skills, there is no need for concern, since it is possible to obtain satisfactory suggestions for use by referring to the recommendations of professionals mentioned above in the subsection, and to relieve the need for recourse to professional maintenance technicians. This reduced the cost of maintenance and yielded satisfactory television usage experience and effectiveness。
