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Блок питания АТ, переделка в регулируемый , окончание . Регулировка тока.

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ремонт электроники

ремонт электрики

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ремонт

блок питания

регулируемый блок питания

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регулируемый блок питание

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переделка компьютерного блока питания

переделки лабораторных блоков питания

блок питания АТ

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power supply, model unknown to the ad,

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model and manufacturer of some kind.

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and I don’t even know, I don’t know what the correct

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name of this power supply is, now I need to

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check the working one; if the workers are not working today,

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then we will repair it together with

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you, as I promised, every

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power supply unit, if it is working, then I will briefly

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show you how I will remake it; the

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charger here is 33

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transformers, apparently 470

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capacitors is possible, in principle, a

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good charger

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should turn out so the power supply

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turned on, as we see the fan is

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rotating, that is, the power supply

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turned out to be working in Rome, there is

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nothing special to repair here, which means what will happen,

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I will redo the circuit of this

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power supply, it’s useless to look for it, I don’t even know

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200 watts on I don’t even know what kind of model this is.

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Once upon a time, some Chinese

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manufacturer produced such

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power supplies, so I’ll now download the standard

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circuit diagram for power supplies as well.

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what is there and on the preliminary diagram

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I will show that I will desolder from here

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there is no principle at all for remaking

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this atten power supply

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and then live on the board itself I will show what

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I drank and what did not fall out in order

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to proceed further with the rework,

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the transition is necessary to get rid of this

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bundle of wires because it is in the way. it’s

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really inconvenient, I’ll leave two yellow and

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two black wires, I’m going to

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remove this power supply at a nominal value of 5 6

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amperes, maximum 10 amperes, two wires of

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short length will be enough,

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you found the diagram, the diagram is more or less

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similar, you can even say it practically

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corresponds, I don’t know the nominal value, I didn’t check it, it

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corresponds to ours the power supply is

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practically possible, very small

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changes are possible; according to the groove diagram, they will scratch out in front of

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you what needs to be removed and here I will show you

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how it will be removed live;

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we will alter it according to the

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traditional scheme that always

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started alterations; we will use this diagram; I will

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delete it and mark it on the diagram. that I

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removed I drank all the unnecessary wires from

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two black to yellow those that will

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be needed later

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nothing has fallen out yet before I do it I want to

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show it on the diagram directly with a red marker

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I’ll try to strike if it works out

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that we will be one hundred percent and water it

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so let’s go line plus 5 volt you

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will see the whole everything UPA them along the line plus 5

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volts line minus 5 volts we also unsolder all the

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inductors after stabilization we

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unsolder them then we typically wind them up like this the

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President's line volts we have

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two diodes left remaining a resistor

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capacitor so in short the

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inductor we will wind up new UPAs and this is

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it we desolder the resistor capacitor inductor of the

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-12 volt line and so there is no mistake,

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this diode that comes with two

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Schottky diodes here goes to the plus 12 line we

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leave the

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resistor 22 mind also remains on the power supply

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capacitors then I will sing in the future Kotov

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this all unnecessary will be

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clearly visible after that a diode comes to you which

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and here it is a 20 scrap resistor which

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goes to power the PWM controller here they are

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they remain accordingly and the

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capacitors so on cook good

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removing what we must still remove here here

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come our output voltages

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here they come on the fourth but

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diode that will need to be removed, so

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we all also remove the zener diodes,

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this zener diode, this diode and the

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capacitor that comes from the reference

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voltage 4 and, in principle, can be left,

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and this resistor that goes to the

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ground on the 4th floor was left like this here even before

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the fall, noted that he everything is removed for

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now, for now we’ll stop with the cardinal

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desoldering here in the removal of the

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PWM controller, of course

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we’ll also remove this resistor,

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which goes to us specifically

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copied, rides 4 7, it will be necessary to replace the

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feature of this power supply that the

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adjustment is voltage,

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voltage control is carried out from the

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five-volt line here is it, is there

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some voltage going to the first leg?

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We will replace this resistor with this 47 times of

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the time, here we will put 22 1st place from this

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resistor,

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this will be visible in a larger view in the future, the

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second third will remain

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unchanged of the capacitor with resistor 4

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on and how again burned through a resistor to

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the ground, connect

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5 6 leg without touching 7 on the ground 8 11 you,

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too, invariably

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we have transistors 940 945 that

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go just to the matching

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transformer, small, this one, here they are,

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our two transistors,

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here we are, we won’t live here,

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but we start desoldering this whole part,

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we don’t need these after the

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PWM controller, it’s better to leave

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something extra, then carefully

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look at this,

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we definitely water everything, so when we start drinking after

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desoldering, I’ll show this exactly like this in

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detail, I’ll show you clearly how what’s left

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on the board so the first stage is completed you

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will go everything that is not needed at the first stage

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was removed as you can see here everything that

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concerns so far we will write out the controllers and

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did not remove anything we will separately

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look carefully at which

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resistor to choose which one if

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to compose removed all these weekends or

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selected transistors and

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protection removed. I was drinking for now. I just

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marked in red these

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protection transistors in captivity and then they stood here you

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will understand this transistor

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that formed the signal will be torn

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left what is left left 2 3 2

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diodes these are the ones left

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the capacitor idiot this is left

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this line this is the diode here

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it is good you can see this is a diode,

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this is a resistor for 22 minds, this line

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goes to power 12 naesh' and this is what it’s

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all set up now, what I’m doing is not

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necessary, everyone is dialing, winding up the extra

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windings from the group stabilization choke,

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I’ll leave only the winding that was

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12-volt or not it is, in principle,

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wound more or less, then I will sell it in

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thickness, in principle, and it should be enough,

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now this is all I will wind up this circuit for

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us until we no longer need it from here, we

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have removed everything we wanted,

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the only thing I want to draw

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attention to again is that here the voltage is controlled from the five volt

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line

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weekend 1 on e.u. that is, what do you

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suppose we control again and in

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Turin we removed in order to control

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us the 12 volt line plus 12 we need to

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connect a jumper, that is,

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these here this this area where the yellow

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wire plus 12 is connected now from

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everything we have of pine this one the site is

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the exit

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and we just don’t have anything from the poena

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take the jumpers from here connect it

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take the vich here here and then along this

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thin path I don’t know whether

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you can see it or not it’s reflected here it’s

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ready for the paths from it here here here

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here it goes it goes comes from here to

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this and resistors the resistor goes first

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on the lowest here comes to the resistor

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so it goes

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here goes first let's write this

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little green resistor it will need to be

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soldered it is here at 400 beginning of May solder in

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place it at 20 business 18-20 you I

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need to select mine depending on

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what output voltage we want to get. It’s a little small,

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not so

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clearly visible. Now I’ll be assembling the wta

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round, not these ones, but I

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still

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need a capacitor that costs a thousand

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microfarads 35 volts and the resistor here

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says 560 ohms. 3 plugging in from personal

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experience is enough here is such a sister

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of 500 watts, so I wound up a desh in the

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inductor winding, this inductor used

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to be in the sleeves stabilization,

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now it has become a single one, left a

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12 volt winding, these three parts

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we need to be more afraid to take, assemble the

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output line instead of the one that was

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given pro 12 I’m assembling a new output line,

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it will be even more clear now, but

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this figure is more clear 1 6 made

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pro rushed for the jumper from

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plus 12 to plus 5 lines here and there

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pokemon habits that then God forbid you do

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n’t forget about it and we had tracking the

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output voltage from 1 this is probably what

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our output

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line looks like, theoretically you can try to

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turn it on now we should go and

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some voltage will appear that I

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suggested so 4 leg we go and on the

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ground through and wooded here a diode goes to it

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but before to unsolder it, we find the

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fourth leg 34 and see what

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is going here, fear of the earth is going everywhere,

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this teeth is a diode, let’s solder it,

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I wanted to solder it, in principle, it doesn’t affect anything,

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but for his son I always remove it, so

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we remove this diode, change this

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resistor 2 at 20 kilo ohms approximately and

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we will try to turn it on

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so you replaced the poet 302 with 18 kilo ohms, the

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smart ones have been

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removed by the idiot now, in theory, our

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power supply should turn on without problems,

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so it turned on in the power supply and for some

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reason we have 12 volts at the output, but for some reason I

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know why because this resistor

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2 will just need to be increased

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and not 18 kilo-ohms, most likely to 33,

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which may have to be increased more in order

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for the output voltage to rise, so in

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principle everything works, it’s good, now what will you

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need to do with a pen, you will need to

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find a resistor that costs easystart

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that costs between the 2nd and 13th and 14th

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legs, find a constant resistor set on

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yourself and on the dress and replace it with

00:10:19

changes, connect it like this,

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change the central output of the variable

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on the second leg,

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one of the outer terminals to the ground,

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change resist 2 crane on 13 and 14 that

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is for the reference voltage for the price

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it will be a lot of voltage adjustment

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drank and a resistor that stood between 2

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and 15 13 14 leg here on

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plati.ru 208 was located here

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was on this side like this one

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card contact goes to the reference voltage the

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second contacts here are scary the second

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leg

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instead of it, as I already said, I locked

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the variable, the central leg of the variable

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resistor to the second leg, one of the

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outer ones on the reference voltage, red

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here will be 5 plus 5 volts of

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our reference and one leg on the ground on the minus

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outer one, everything worked out for us, adjusting

00:11:09

the voltage is elementary just for

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me one constant resistor on the

00:11:14

variable we get the

00:11:15

voltage regulation here according to the diagram it is indicated

00:11:17

there, everything is very visible,

00:11:20

pause it, consider turning on the

00:11:22

power supply to the network, how to output a voltage of

00:11:25

964 volts, this resistor, which shows on the

00:11:28

first leg with feedback 2,

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has not changed here yet and it costs 18 km

00:11:32

after looking behind the resistor package, we see that

00:11:35

we have a minimum voltage

00:11:37

of four and a half volts, but this

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block from the anode 0 will never go down

00:11:44

after we collect the

00:11:46

minimum voltage in the case somewhere up to 200

00:11:47

volts, drop like that and

00:11:49

look at the maximum What maximum

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can our power supply reach?

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23-24 volts I’m higher and never really

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trying to raise it because it’s

00:12:00

basically a charger,

00:12:02

so 24 volts is higher than you can imagine,

00:12:04

then we adjust the current,

00:12:06

again everything is not so it’s difficult

00:12:08

to regulate the flow, what we need is

00:12:10

basically everything here in the diagram and it’s shown

00:12:12

what I’m doing, I’ll show the general common minus cos

00:12:16

a of a

00:12:17

successful failure and you need to cut

00:12:20

this track like this,

00:12:21

rollback exit exit and from the general exit

00:12:23

which is to the cash register, there’s not such a place so that

00:12:25

there’s nothing in between there was no oblique and there

00:12:29

was nothing at the same place, but here where you cut it,

00:12:31

I cut all the other

00:12:34

connections, the wiring goes after the

00:12:36

shunt, here the shunt will be sealed, one

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leg of the noise is on this part, the second leg of the

00:12:41

shunt is above this part, up to the cash register,

00:12:42

here where the shunt is this is the de casa part, the

00:12:47

resistor is cut, the only limiting resistor is sealed, I usually

00:12:50

set it to 500 tons, it is dressed in the region of 10

00:12:53

amps, the noise is additional, I don’t

00:12:55

use it now, in no case do they use

00:12:56

the same shunt that is on the

00:12:58

volt-amperemeter and how do I

00:13:00

just take the wiring like this and binge it black

00:13:03

the wire

00:13:04

is soldered here to the side and the red ones are

00:13:08

soldered after the shunt,

00:13:09

and thus we get this

00:13:11

noise that becomes exponentially higher.

00:13:23

we are connected directly to the ground,

00:13:25

look at us here like this

00:13:27

16 leg, it really

00:13:29

goes straight to minus, nothing more

00:13:31

needs to be done, it sits with us already starting

00:13:34

on the ground, then we look 15 at k to

00:13:37

we are involved in adjustments, that is,

00:13:39

not only a limiting resistor is suitable

00:13:41

the resistor on the central leg of our

00:13:44

variable resistor, I usually put 10

00:13:47

kilo-ohms and there is a chain of rc chains of thirds

00:13:50

on and from 15, you will run into this capacitor

00:13:52

by 10 nanofarads

00:13:54

and run from 50 to 100 again, the resistor

00:13:57

also goes to the 15 leg,

00:13:58

that is, 15 is needed, yes we have here on the board,

00:14:00

separate it from everything, it will reunite us

00:14:02

13 and 14, I will cut it, I will separate it, that’s all,

00:14:05

since nowhere here for the price it will be

00:14:07

15, we will be hanging in the air, I’m soldering it right

00:14:10

here, right to leg 5,

00:14:12

so I’ve already assembled a resistor that will

00:14:16

go to this one a 10 megohm resistor it

00:14:18

will go to the middle leg

00:14:19

adjusting the adjustable resistor, that is,

00:14:22

let’s solder it now, in principle, all this

00:14:24

will be visible, assembled the circuit, made

00:14:27

current limits, added another

00:14:29

resistor on purpose, did not put on

00:14:30

heat shrink, now I’ll explain where everything

00:14:32

is connected to, for starters, I’ll demonstrate the

00:14:34

voltage adjustment occurs up to 24

00:14:39

volts, nothing has changed and we

00:14:43

have limitations on the current; stabilization of the

00:14:45

flow, and so by selecting this

00:14:48

resistor, then it still stands at 330; it

00:14:51

stood on the mast

00:14:52

at 500;

00:15:00

Now we have, according to my limitations, I

00:15:01

begin to add,

00:15:08

the lamp lights up and goes to its working state,

00:15:12

you can even put one

00:15:15

amp half an amp at full heat,

00:15:22

that is, the flow is adjusted, and

00:15:24

now I’ll show you how everything is connected here

00:15:27

if it’s very simple,

00:15:29

I didn’t put on heat shrink on purpose, I also change the resistor

00:15:33

to 10 kilo-ohms the central leg of the

00:15:35

alternating forest through a resistor at 10

00:15:37

shitty immediately reduces everything to 15 on and it

00:15:41

just beat the wire for just two

00:15:42

days on the extension cord 15 legs and now we have

00:15:46

a resistor limiting the maximum current

00:15:48

from the cash register

00:15:50

15th goes from the central leg through a

00:15:53

resistor at 10 a kilo-ohm is also 15 legs,

00:15:55

and here we already have a heat-shrinkable rc

00:15:58

chain with a 100 ohm resistor and indeed a

00:16:02

farad capacitor from 15 legs, also

00:16:04

females, 3 legs, that’s the whole assembly, one

00:16:07

spark from their legs goes to the reference

00:16:09

voltage, what is its voltage, and 2

00:16:11

roots of the leg goes to minus the same

00:16:13

as voltage adjustment, here the

00:16:17

track is cut, a shunt is inserted, the track is cut 16,

00:16:21

the leg goes completely to the ground

00:16:23

15. also just green like that, at 15

00:16:26

the leg is also separated from everything and now it

00:16:28

only goes to this junction at 3

00:16:30

thousand and the line says that everything is

00:16:32

quite simple, it’s so visually it

00:16:35

seems complicated, in fact everything is

00:16:36

very simple if you do it slowly

00:16:38

and carefully step by step then everything will work out

00:16:41

first you ate everything unnecessary according to the diagram I

00:16:43

showed at the beginning of the video in red due

00:16:45

to the elections everything is not necessary the second stage

00:16:47

we do the voltage adjustment that is we

00:16:50

change just one resistor to the front

00:16:51

constant on the variable and in the third

00:16:53

stage we climb over the path and assemble the

00:16:56

stabilization protection flow adjustment

00:16:59

under it once again the diagram shows the scheme

00:17:03

of the alteration everything is very simple, do everything

00:17:06

as written in the diagram everything will work out

00:17:08

even the denominations can be used the

00:17:10

same as the diagram

00:17:11

so to everyone who watched thank you bye

Description:

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