Hardware Information |
|
Testing Capacitor-How To Test A Capacitor When Breakdown Under Load
Have you ever come across power problem where onceyou switch on the power supply and the fuse blow? Youhave checked all the components in the power (primary)and secondary section and all the components seems to beok! Where is the fault? A fuse blown are usually causedby a shorted bridge rectifier, defective posistor, powertransistor or FET, shorted primary winding of switch modepower tranformer, shorted secondary diode and etc. Butin this article i'm gone to show you another secret of electronic troubleshooting tips. I got frustrated as to where is the cause of power problem.Everytime when i switch on the power supply the fuse blowimmediately (the fuse became dark color and this indicatethat there is a major short circuit in the power supply).I have checked all the components in the power supply and can't find the culprit! What i do is i desoldered all the suspected parts one by one and replaced with a known good component. I eventually found the caused of the power supplyproblem. Guess what? It was the main filter capacitor(220 microfarad 400 volt). After replacing the filter capthe power supply worked perfectly fine. I begin my detective work to find out why this capacitor can caused the fuse to blow eventhough i already confirmed it ok with my meters. The meters that i used to check the filter cap were analogmeter, digital capacitance meter and esr meter. In thisarticle i will not explain about how to check capacitor ortesting capacitor and how capacitor work.I believed most of you know how to check capacitors and also generally using this type of meters. Measured with analog it showed capacitor charging and discharge, with digitalcapacitor tester it showed around 220 microfarad and withesr meter it showed low esr reading! This proved that the bad capacitor breakdown when underfull operating voltage. Then, how do i confirm that thisfilter capacitor is faulty? By using an analog insulation tester. When i connect the faulty cap to the meter and pressthe go button-it showed a very low resistance and this is the proved of short circuit between the plate when voltage applied!There is nothing to do with bad electrolyte.A good capacitor will just showed a charge and discharge in theinsulation meter just like you are checking a capacitor usinganalog multimeter. In the market there is quite a number of ranges that you can buy. It has the range of 50v, 100v, 250v,500v, 1000v and even 5000v! If you want to test a capacitorof 100 microfarad 160v then you have to select 100v. If youselect 250v, it will blow your capacitor that is under test. If you have the SENCORE TEST EQUIPMENT such as thesencore lc meter LC102 OR LC103, these meters have the capabilities of checking any type of capacitors with four tests: It can check aluminum electrolytic capacitor, film capacitor,ceramic, high voltage capacitor and etc. Conclusion-Different capacitor manufacturer produced different type of quality of a capacitor. Perhaps the bad capacitor that Iencountered are from the lowest grade one.A capacitor failure when under load is very rare.Using ESR capacitor meter alone can solvemost of the electrolytic capacitor problem. Jestine Yong is a electronic repairer and a writer. For more electronic repair information please visit his website at http://www.noahtec.com/electronic-repair-articles.htm
MORE RESOURCES: Nvidia RTX 4070 Ti with memory mod easily beats RTX 4080 in Superposition benchmark - Tom's Hardware Asus vows to improve clarity surrounding warranty claims and astronomical hardware repair costs Tom's Hardware Bye Bye, AI: How to turn off Google's annoying AI overviews and just get search results Tom's Hardware Montclair hardware store to close after 131 years in business News 12 New Jersey My Mom and Dad Owned Competing Side-by-Side Hardware Stores. It Was a Lesson in Life. The Wall Street Journal OP police looking for 6 people involved in hardware store theft: WDAF FOX4 Kansas City Hardware Center in Paoli shutting down after nearly 73 years The Philadelphia Inquirer Ace Hardware Reports Increase in Q1 2024 Revenues Hardware Retailing Canyon ISD brings home hardware at UIL state tennis tournament Press Pass Sports Overland Park police searching for suspects in multiple thefts KMBC Kansas City Best Tech and PC Hardware Deals Tom's Hardware TSMC's third generation 3nm node on track — N3P mass production to begin later this year Tom's Hardware ACE HARDWARE REPORTS FIRST QUARTER 2024 RESULTS PR Newswire Intel-powered Aurora supercomputer fails to dethrone AMD-powered Frontier on Top500 list, again — claims spot as ... Tom's Hardware Three-year-old CPU beats Intel's fastest current chip in RAM benchmark — 7 GHz Core i9-11900K tops 8.3 GHz Core ... Tom's Hardware Enthusiast gets Windows XP running on an i486 — merging two dinosaurs from different eras Tom's Hardware Best Webcams for 2024 Tom's Hardware OpenAI's new assistant makes Apple's Siri look primitive, also announces GPT-4o and new desktop PC client (Updated) Tom's Hardware Schoolmeester, Diani bring home hardware for Banks | Sports | forestgrovenewstimes.com Forest Grove News times Massive Dell blunder leaks Intel and Nvidia's mobile roadmaps — Nova Lake, Panther Lake CPUs and GENxx Nvidia ... Tom's Hardware How Much Does It Cost To Open an Ace Hardware Franchise? 1851 Franchise Ace Hardware purchases 13 local chain store locations across central Illinois The State Journal-Register Melaco Sisters Hardware & Supplies Player of the Week: Zariell Pollard Lafourche Gazette DisplayPort 2.1 has a serious issue with UHBR-certified cables — it could explain Nvidia sticking with DP 1.4 on RTX ... Tom's Hardware CPU Benchmarks and Hierarchy 2024: CPU Rankings Tom's Hardware Western Digital rolls out new 2.5-inch HDDs for the first time in seven years: is 6TB the swan song for 2.5-inch hard ... Tom's Hardware US to increase tariffs on Chinese semiconductors by 100% in 2025 — officials say it protects the $53 billion spent on ... Tom's Hardware Homegrown European processor for supercomputers delayed by a year — chip upgraded to 80 cores, but timeline gets ... Tom's Hardware GPU Price Index 2024: Lowest price on every graphics card from Nvidia, AMD, and Intel today Tom's Hardware If you think PCIe 5.0 runs hot, wait till you see PCIe 6.0's new thermal throttling technique Tom's Hardware Ace Hardware Brunswick | Ads | fredericknewspost.com Frederick News Post Hardware Wildlife Education Center Utah Division of Wildlife Resources Microsoft offers to relocate nearly 10% of China-based staffers to the US or allied nations — AI and cloud engineering ... Tom's Hardware URI club sailing team heads to nationals, collects post-season hardware The University of Rhode Island Intel's 1500W TDP for Falcon Shores AI processor confirmed — next-gen AI chip consumes more power than Nvidia's ... Tom's Hardware Hardware visit Utah Division of Wildlife Resources PS5 Best-Seller, Sales Drop For All Consoles - Europe Hardware Estimates for April 2024 - Sales VGChartz Nintendo Switch hacked to run Windows 11 on Arm, and it's just about as awful as you can imagine Tom's Hardware Intel's new Thunderbolt Share provides file and screen sharing without hurting network performance Tom's Hardware Ace Hardware partners with Webster Parish Council on Aging for fan drive Minden Press-Herald Area softball teams in search of hardware at various state tournaments Moscow-Pullman Daily News Save up to 50% on BBQs, lawn mowers and garden essentials during Home Hardware's massive pre-summer sale Yahoo Canada Shine On Windows translator makes PC games run on Android — Fallout 4 demoed at 30 fps using Winlator app Tom's Hardware Our newest hardware office in Taiwan The Keyword | Google Product and Technology News Curt's Ace Hardware Ribbon Cutting - Morristown, TN | Local News | citizentribune.com Citizentribune OLED monitor momentum expected to continue — analysts expect 1.34 million units shipped by year end Tom's Hardware 5 Best Hardware Wallets for DeFi in 2024 CoinCodex Windows 11 24H2 will enable BitLocker encryption for everyone — happens on both clean installs and reinstalls Tom's Hardware Asus quotes ridiculous $2750 fee to replace chipped GPU power connector— docs back up claims of egregious repair ... Tom's Hardware Newcomer Campbell Collects Major Hardware in CAA Softball Postseason Honors Colonial Athletic Association Stack Overflow bans users en masse for rebelling against OpenAI partnership — users banned for deleting answers to ... Tom's Hardware Huawei brings sanctions-busting Kirin 9000C CPU to desktop PCs to replace banned Intel Alder Lake chips Tom's Hardware Full scan of 1 cubic millimeter of brain tissue took 1.4 petabytes of data, equivalent to 14000 4K movies — Google's AI ... Tom's Hardware Nvidia's next-gen Blackwell AI Superchips could cost up to $70000 — fully-equipped server racks reportedly range up ... Tom's Hardware |
RELATED ARTICLES
Cisco CCNA Certification: An Illustrated Guide To Ethernet CSMA/CD When you're studying for your CCNA exams, you're going to study the theory of technologies we basically take for granted in networking. CSMA/CD is one of those technologies. JunxionBox -- WiFi Access Everywhere Now you can more easily access the Internet wherever mobile phone carriers offer high-speed data service coverage.The JunxionBox enables multiple computing devices with Ethernet or Wi-Fi (like laptops, desktops, handhelds and remote computers) to connect with the web through your mobile phone service provider's wireless PC Card modem. LCD Monitors: A Catching-On Technology If you've been in the market for a new computer monitor fairly recently, you might have noticed just how many more LCD monitors you see in the stores now.It's obvious that the main benefit that's being pushed about computer LCD monitors is that they're flat, and you can put them almost anywhere, but you might be curious about just what you're giving up by going LCD. Introduction to Dedicated Servers A dedicated server is a single computer on a web-hosting network that is leased or rented, and dedicated to just one customer. A service provider monitors the computer's hardware, network connectivity, and routing equipment, while the customer generally controls and maintains the server software. At War With The Internet When it comes to sales of technology products over the Internet, there are now two factors that potential buyers must consider as possibly 'too good to be true'. In the past, there was only price to worry about. A Look at Laser Toners Laser toner is the ink for laser printers. It is an extremely fine synthetic powder (usually plastic) packed into a cartridge. Protecting Your Computer From Power Surges, Data Loss, Viruses, And Spyware Protecting Against A Power Surge:Your computer is an expensive investment; you should protect it from a power surge. If a sudden rush of electricity hits, a surge protector will blow the fuse or trip the breaker, this is what saves your computer. How to Solve Multiple Paper Loading Problem in HP5L and HP6L Laser Printer Have you ever encountered before the problem of having multiple paper loading in your HP LaserJet 5L and 6L? Do you know that this is caused by a defective separation pad where it's rubber has worn out.The function of separation pad is to control or allow paper to go through it, one at a time. Choosing The Right Bar Code Reader The importance of a bar code reader in this day and age cannot be denied. A lot of practical and pragmatic applications for a bar code reader have been rendered essential by the changing times. War of the Disks: A Close-in Analysis of the Hard Disk Drive vs. the Solid State Disk Much has been written about solid state disks (SSDs) becoming the next big thing1 in the IT industry(1). But as to whether or not we have enough knowledge of how it will revolutionize the industry is a different question. LCD Vs. CRT When buying a new computer, or upgrading your monitor, you may be in somewhat of a conundrum deciding between an LCD or CRT monitor. That's understandable because for most people the difference is just size. How to Choose The Right Laptop Accessories? The notebook computer is coming of age. For the firsttime in history, notebooks or laptops are out-sellingtheir bigger cousins, desktop computers. How To Format A Hard Drive Here's how to format a hard drive (Legal Stuff: We are not responsible for any damages, lost data, or anything of the sort).. Can I Use My Old Ink With My New Printer? The quick answer is.. Electronic Schematics Diagram-The Four Commonly Asked Questions I came across quite a number of questions about electronic circuit schematics diagram.Most of the question asked are:a) Do we really need a schematic diagram in order to repair any electronic equipment?b) Will schematic diagram help us to repair faster?c) At where we can get a particular schematic diagram?d) How to read schematic diagram?Well, the answers is as below:a)-Theoretically yes, practically not necessary, it all depends on how good you arein electronic repair knowledge. Choosing a Tape Drive Tape drives remain the leading technology used by organizations for backup and archiving. However, the plethora of tape drives on the market can make choosing the appropriate tape drive a confusing task. How To Buy The Perfect Student Laptop If you are like most student's, money isn't exactly growing on trees. Choosing the right laptop can be a matter of saving yourself a lot of heartache and money at the same time. Wireless Networking, Part 2: Setup and Security The first installment in this two-part series of Tech Tips provided an introduction to the basic capabilities and hardware involved in wireless networking. In the final installment of this two-part series, we will look at some of the basic setup and security considerations that should be addressed. Buying a New Computer Someone recently asked me "I teach senior citizens in a community based free computer lab. They often ask what to look for when buying a computer, what software they need for email, basic Internet usage, word processing, etc. The Constantly Changing World of Inkjet Technology We have finally advanced to a time when technology can greatly improve graphics and printing. The technology we have at our disposal now is so advanced we are able to produce inkjet printers capable of printing proofs so accurate they can actually represent the end product. |
home | site map |
© 2006 |