All household electrical appliances are inherently quite simple equipment. If you do not go into particulars, then most often the engine, gearbox or working body fails. It is due to this that many professional builders prefer a power tool. He does not need repairs so often, but due to its simplicity it costs much less than gasoline counterparts.
We think that in the case of the same saw, even a complete ignoramus will visually determine the breakdown of the saw bar or open circuit, so we’ll immediately talk about some principles of repair and
troubleshooting of the engine.So, if your faithful assistant does not turn on at all and does not give other "signs of life", then you can not do without a multimeter, but if you can’t buy it, it is quite possible to use an ordinary incandescent lamp for the same purpose. It will help bring your power tool back to life. Repair should begin with preliminary preparation for it.
You can guess that the most important preparatory step should be considered the removal of all external parts that may interfere with the disassembly process. After that, we turn on the instrument in the network, and using the control lamp we mentioned, we “ring” all the connections. Needless to say, how important is safety.
If all the conductive paths work, then the most unpleasant thing happened: the engine flew. In most cases, you have to change it, but you can try to remove it and conduct a diagnosis. It should be noted that only a highly qualified specialist in such a situation will be able to bring power tools back to life. Repairing it by an ignorant person will lead to the most sad consequences.
If we talk about the diagnosis of malfunctions of the mechanical part, then we have already said that in most cases this can be done through a simple visual inspection. Most often, a damaged part simply changes. Especially good in this regard is the repair of Bosch power tools. The fact is that in its service centers, and just in retail, you can find almost all the details for it, which competitors almost never have.
Inspecting the "insides" of the affected tool, you can often see the damaged collector. It often seems that there is simply no reason for such a serious breakdown.
Most often, an extremely strong heating resulting from the sparking of the brushes leads to this outcome. By the way, very often they begin to spark with existing shaft defects. In addition to brushes, due to the same malfunctions, their holders fail. Determining the cause in this case is quite simple, so you will hardly need a service repair of a power tool in Moscow, since it is not so difficult to replace the brushes yourself.
If we talk about the engine, then most often the cause of breakdowns is some kind of malfunction in the stator windings. Often there are short circuits between them, which almost certainly disable the power tool. Repair in this case consists in replacing the engine, since it is too difficult to rewind yourself.