If your appliances are no longer included, it isn't excluded that the fuse is indeed burnt
And now the fun part
Why is burning the fuse in the network equipment? Many of us still remember tube TVs that do them have changed, and successful, after replacing the beloved "box" came to life and continued to please their owners . For anybody not a secret that in the models of those years, the fuse block was available on the back cover, so replacement is not difficult
Often, instead, put a "bug", since fuse is (usually) had a few, the number of such "bugs" are gradually increased, and the fact that they were time bomb , the owners usually learned later (if not immediately sparks flew with a terrible crash after this "replacement" )
You think from appearing then scary stories about what TV caught fire or exploded? And why not, if all the protection just removed, and inside the few pieces of paper crammed (so the lamp is better to keep), a couple of rags (forgot when was dusting)...
In modern technology You will rarely find the fuse, open for access, as a rule, he (and only, at the input 220V) is hidden inside the scheme. Why was it made? It's simple: the fuse does not burn just like that, there is always a reason! So hiding him away from sin, as the thought of his replacement (on "the bug" in particular) very often visits those who are not familiar with how it works
will Try to explain as simply as possible:
At fuse, as a rule, two characteristics: voltage and current. Caption: 250/4A, for example, means that it can pass through itself a current 4 amps if you will be in the circuit 220 (to 250) volts
Now, look further, get a modern TV, inside is a fuse on the 4A. Let's do a simple calculation. From school physics course we know that the power (W) is equal to: voltage (U) multiplied by current (I)
Consider: W=UxI=220х4=880 Watt. Almost 1kW
This is the kind of power that can pass through a 4 amp fuse. And now look behind the rear cover of the TV: 100W, almost eight times smaller.
It has a solid stock on the starting current surges, etc., as now used transformer, and "pulsed" power supply units, the principle of which is fundamentally different from conventional
So why is it burning? Fuse opens in case of short circuit inside the circuit of power module, it protects the power supply from burnout that typically happens if you put "bug"
Frequent questions: was the difference, given in the 380 why not a blown fuse, a burned power supply?
Answer: let's count (for convenience, according to the first formula, for TV, power 100W)
W=UxI, hence the current I=W/U
At 220V network: I=W/U=100/220=0.45 A
At 380V in the network: I=W/U=100/380=0,26
As you can see, the current consumption was not more, but less, so the fuse will burn only when inside the power supply will occur short circuit (will burn anything, unable to bear this voltage)
According to Ohm's law, current (I) is equal to voltage (U) divided by resistance (R). In case of short circuit, the load resistance (power supply unit) is equal to zero, then the current will increase tenfold, then (when it is more 4A) fuse, protecting the remaining working part of the power supply and your wiring
Not seen burn the wiring in the apartments and Wallpaper Smoking? I saw, believe me, the show is scary enough. Therefore, to avoid this, never put bugs in the art and is the housing of the machines!!!
Here are a couple of examples of what happens after the installation of "bug".
On the spot black burnt the Board were the details now, just dump
Another fee if the owner did not climb in your camera, the repair would be much cheaper...