| |
| |
|
Hardware Information |
|
|
|
The Right Way To Discharge Capacitor In Switch Mode Power Supplies
Switch mode power supply contain some large filter capacitors that can hold dangerous charges even if the unit has not been used for several days. Typical values of this type of filter capacitor are 220uf 250volt and 330uf 400volt! If you are going to work on the power supply circuits, it's a good idea to discharge that capacitor first. There are three ways to discharge the big filter capacitor in a power supply. 1)Discharge it with a screw driver (not recommended). The reason for not using the screw driver to discharge a capacitor is because -the printed circuit board or circuitry can be damage due to the spark generated while discharging the high voltage capacitor.I once blowed the power section using this method. However, if you know that the capacitor stored voltage is not too large, you can easily discharge it with a small screw driver. -if the capacitor holds a heavier charge of electricity. Discharging the capacitor may melt the tip of the screw driver and the copper on the printed circuit board. -Sometimes a heavier spark may cause small disintegrated solder lead or copper to fly out from the circuit board and may injured your eyes. 2)Place the leads of a socketed 100 watt electric bulb on the leads of the capacitor. This method had been used by many technicians around the world for the light bulb will act as an indicator to see if the capacitor still holds the charge. If there is a charge the light bulb will light and after discharged the light bulb will goes off. 3)Place the leads of a high wattage resistor on the leads of the capacitor.I use a 2.2k ohm 10 watt resistor to discharge the high voltage capacitor in a switch mode power supplies. It is simple to use and very effective .It takes only couple ofseconds to fully discharge the capacitor. Conclusion I strongly suggest for those who use screw driver to discharge a capacitor to swift to the second and third method as these is the safest method to protect the circuit and most importantly is yourself. Jestine Yong is a electronic repairer and a writer. For more electronic repair information please visit his website athttp://www.noahtec.com/electronic-repair-articles.htm
MORE RESOURCES:
Audio-Streaming - Google News |
|
|
|
RELATED ARTICLES
Using System Restore to Save Yourself from Formatting Your Hard Drive It is the most annoying thing when one day you use your computer and nothing seems to work fine. Program freezes, files get corrupted or internet doesn't work. Heliodisplay --Computer Video With No Screen Science-Fiction meets reality with this new video display technology.The Heliodisplay includes patented and patent pending technology to transform normal ambient air and display video images into free-space. Personal Asset Preventive Maintenance Software Personal asset preventive maintenance software exists to help people manage and maximize the value of their assets. Common types of personal asset preventive maintenance software deal with taxes and investments. Dell Inspiron 600m Notebook Computer After twelve years of owning desktop computers, I finally opted for a laptop so I would no longer be chained to my desk. After months of research and weighing various makes and models, I settled on the Dell Inspiron 600m Notebook Computer. Computer Network Installation Computer network installation has become an essential prerequisite for any efficient modern-day business as it allows employees to truly work as a team by sharing information, accessing the same database and staying in touch constantly. For a computer network to give the best results, a lot of detailed planning and foresight is required before installation. Learn to Find Cheap Laptop Computers on the Internet Cheap laptop computers are coming to a store near you. In fact, there are many there already. A Short Introduction to Blu Ray Blu ray is a next generation optical media format developed by the Blu ray disc association, a group of leading consumer electronics and technology companies such as Apple, Mitsubishi, Panasonic, Philips, Samsung, Sony, TDK to name, but a few.The format was developed for high definition video, as well as storing large amounts of data. Your Printer Is Out Of Ink -- Now What? We've all been there. You're in the middle of printing out an important document and your printer suddenly stops. How To Save Big Bucks On A Laptop Computer If you're a bargain shopper looking to get the most bang for your buck, you'll find no shortage of deals on the Internet.And that's particularly true in the fast-changing world of laptop computers, where you'll find three bargain sources right at your fingertips:1. How To Choose A Computer Case Things to Consider When Choosing a Computer CaseIn the past, computer cases were all very similar? Clones of the same boring, beige box. With all of the choices available today, this is no longer the 'case', and people can use their systems' chassis as a means to express themselves and to set their system apart from the rest. Printers Do you feel overwhelmed when buying a computer or a new printer?You are not alone. With so many products to choose from I know exactly how you feel. A Review of HP Laser Toners Hewlett-Packard is, along with Brother and Samsung, one of the most readily available brands of laser toner. This is due, in part, to the fact that HP was first to release a laser toner inexpensive enough to catch the attention of the average consumer, in 1984. What is Over-clocking a Processor? Q : What is over clocking?Overclocking is when you make your system processor run faster that its normal speed. This has many advantages and dis-advantages. Flyback Transformer-How to Locate the ABL Line Whenever there is a complaint about monitorcontrast problem I will check on the flybacktransformer ABL (automatic blanking limiter)circuit.Sometimes a weak picture tube might causedcontrast problem. Expansion Cards Part 1: (of a 3 part series) PCIThe expansion slots available on motherboards allow for a variety of upgrades in a computer system, but matching the appropriate card to an available slot needs to be addressed before making any purchasing decisions. The most common types of expansion cards for modern computer systems can be broken down into three formats: PCI, AGP, and PCI Express. Quality Recovery and Rework - When It All Goes Wrong When Quality is the Target, but not the Result, what do you do?While Quality may be the overarching goal of all production, stuff happens, resulting in non-conforming parts. This results in failure verification, rework, recalls, sorting, kitting, retest, relabeling and pipeline management, which are facts of life in the manufacturing, assembly and production world we live in. How to Add or Remove an IDE ROM drive CD ROMS - If you're adding or removing an internal cd-rom, dvd-rom, or just about any internal ROM that has an opening CD door, read on. Almost all IDE devices such as CD-ROM, DVD-ROM, etc. Power and Your PC The power coming into a computer is the most critical component, and it may be one of the most overlooked. It is just taken for granted that it will always be there and working properly. Testing Flyback Transformer - How to Test and When to Replace It Nowadays, more and more monitor comes in with flyback transformers problems. Testing flyback transformers arenot difficult if you carefully follow the instruction. A Guide To Bar Code Reader Downloads Bar code readers have proven themselves to be essential tools in modern day business. Establishments, both big and small, have started to rely on bar code readers to make their operations quicker, more convenient, and more efficient.
|
|
|
Top of Page home | site map home Bookmark Us Now ctrl+d 1st 4 Games, shopping via this site cost no more than going direct and can often save you money with special offers. |
