Laptop Repair In Hyderabad

you hello all going to make  acer laptop repair in hyderabad a video on testing the circuitry of a motherboard off a laptop now this is a Fujitsu motherboard which is in full working order this particular board but we're going to test the circuitry of the charging circuit now on this particular board  acer laptop service in Hyderabad this is the charging circuit down here else move it up to you can see a bit there so this is the charging circuit along here so basically what we've got we've got the main components on the charging circuit now we've got the DC power jack in which then goes through a little coil that's down here which you probably can't see at the moment you'll see one resumed in sony laptop service in Hyderabad  a little while and then it comes through this coil through this fuse to a transistor into this coil which then goes on to this chip now this chip here is the charging chip and you'll have an input voltage of 19 volts and an output voltage of about 5 volts so you need to check the input and output on that as well so we're going to run through this circuitry on how to test each Dell laptop service in Hyderabad  components and which pin to look for the voltage now what you need to remember is that on a circuit diagram you'll look at the diagram that's relevant to that board now not all charging circuits will be laid out in a continuous line like this one this is just a good good example that shows us how we can test the components and it's quite you want to follow because it's laid out virtually as it comes through the components so what you want to remember lenovo laptop service in Hyderabad  is that when you when you do testing of charging circuits on motherboards or any any components on a motherboard is that you'll have a drawing Pacific to that board so if I show you on this board to test the components when you look at a different board you'll go hmm that doesn't look the same well doesn't matter because if you can read the  hp laptop service in Hyderabad drawing and recognize the components I also read the component ID numbers then you haven't got a problem whatsoever because all you've got to do is look at the drawing and say the voltage goes through there it then goes through this now what would happen if it went through this okay we should still have 19 volts so on so on so on now and in the case of the  lenovo laptop service center in Hyderabad charging circuit we've got 19 volts all the way up to the charging chip now once beyond the charging tip we've then got 5 volts which then is amplified up to 10 volts which gives us our 10 10 volt output so that's basically the fundamentals of a charging circuit as I say it's quite a simple circuit all laptop motherboard laptop repairing in hyderabad  circuits will be pretty similar and the may have different components the component placement might be different the component ID numbers might be different but the circuit is pretty much the same so it's just a case of looking at the drawing following dell laptop service center in Hyderabad  the drawing and check in different components at different pins now on some of these boards you will have test points like this this little lem chip PA CS tiny as you can see from this flat-head screwdriver this is a small flat head and you can see how small a trapeze but on this board you'll see when i zoom in that little these little test points within the hp laptop service center in Hyderabad  board and which just little solder points for testing where you can get your probes and tests now the probes that I'm using are these are homemade products I couldn't get any small enough when I was looking for some so see whatever I've got two probes the same here and all you can see that it's basically the probe is a pin it's the size of a pin on the end and that's ideal then just for getting onto these these pads just a tube some testing so that's basically what we've got Laptop service in Hyderabad  and that just plugs into a standard test meter this is the test meter that we'll be using and it's just a standard test meter with your normal voltage range and we're going to be testing in DC volts and we know that the input voltage is 19 volts so I'm just going to set the acer laptop service center in Hyderabad  range to 20 volts DC and we're going to test off the 20 volts DC range so I'll get all that set up now and then we will come back and see the testing of the motherboard okay so we're going to test the components now so if we look on the drawer in we can see the DC Jack the inductor goes down here and the fuse so these are the first three components were  laptop repairs in hyderabad going to test now when we test for an output voltage on the DC jack and we're going to test for an input onto the inductor and an output off the inductor laptop keyboard repair in hyderabad  and an input and output on the fuse now after that it then goes onto this transistor