PC Power Supply Repair

Greetings to all who visit this blog we will post them today information on how to repair a computer's power supply may be the case that any of you have a damaged power supply and want to repair then this information will be very useful and so you know how PC Power Supply Repair

For us to repair a power supply is necessary to have certain tools, starting frm a couple of screwdrivers, soldering paste, tin, and also a soldering iron, just as it is necessary to know a little the electronics, because having a damaged power supply may be the case that more than any diode or resistor is damaged, therefore it will be necessary to use the tools I mentioned before. tools needed to repair a power supply : 1 Meter or "tester" 2 Transformer 220V-220V or 110V-110V 3 series 100w lamp. 4 Welding or soldering iron about 40W. 5 Tin and other items for desoldering and soldering. Some procedures for PC Power Supply Repair

1 If the fuse is blown, replace it before you start measuring other diodes or bridge rectifier. The diodes conduct current in one direction only. If the reverse ends of ohmmeter lead in both directions is that they are short and must be replaced.

Never solder a wire instead of the fuse, this can cause the source to deteriorate further. 2 Continue unsoldering and measuring switching transistor line input. Most of them are NPN, as measured remember the base-collector junctions or base-emitter should lead to a one-way, if they score very low resistance should be replaced. In the majority of sources including While the ATX type work BUT11. 3 corroborate the "filters" or electrolytic capacitors are not defective. Visually you can see if spilled oil, if exploded, or (with the ohmmeter) if shorted. 4 There are 4 resistors associated power transistors often deteriorate, especially if they are shorted. The values ​​vary between different brands but identified it as 2 are connected to the bases of these transistors and prowl in the 330k Ohms while the other two are from about 2.2 ohms and connected to the emitters of the transistors. 5 Starting the source is obtained by a polyester type capacitor in series with the input transformer and a resistance of approximately 10 Ohms. If any of these components open source does not "start". 6 when testing the source, since they work directly with line voltage, you should connect with a line isolation transformer type 220V-220V or 110V-110V . This will avoid unnecessary risk and danger of electrocution. You can also connect a 100W lamp in series if there is any short circuit. 7 ATX sources need a starting pulse to start. You can connect power to the Mother Board without having to connect the rest of the elements as floppy, hard, and so on. But this can only be done after having checked that the source is not in short, the procedure in paragraph 6. 8 If after applying these procedures does not work and would need to check the oscillator and for this there must be at least 20 MHz oscilloscope. The investment of time and cost of the power we will decide whether to go ahead. The integrated pulse modulators of most sources are in the circuit manuals Philips ECG type or the like. It begins by checking the power of the integrated and tensions in the different legs. You can also check "cold" (ie without being connected to the source) diode is not shorted. In these sources are used 1N4148 diodes low signal types that are easily damaged (measured with the ohmmeter) and zener diodes which tend to get short if you accidentally change the supply voltage of the source. In most fonts are integrated rectifiers resemble physically but internally transistors are only 2 diodes. You can remove and measure off the circuit for the transformer with which they work will appear, as measured, which are short. I hope that will be very helpful this information.