Testing Flyback Transformer-How to test and when to replace it

Written by Jestine Yong

Nowadays, more and more monitor comes in with flyback transformers problems. Testing flyback transformers are not difficult if you carefully followrepparttar instruction. In many cases,repparttar 141800 flyback transformer can become short circuit after using not more than 2 years. This is partly due to bad design and low quality materials used during manufactures flyback transformer. The question is what kind of problems can be found in a flyback transformer and how to test and when to replace it. Here is an explanation that will help you to identify many flyback transformer problems. There are nine common problems can be found in a flyback transformer. a) A shorted turned inrepparttar 141801 primary winding. b) An open or shorted internal capacitor in secondary section. c) Flyback Transformer becomes bulged or cracked. d) External arcing to ground. e) Internal arcing between windings. f) Shorted internal high voltage diode in secondary winding. g) Breakdown in focus / screen voltage divider causing blur display. h) Flyback Transformer breakdown at full operating voltage (breakdown when under load). i) Short circuit between primary and secondary winding.

Testing flyback transformer will be base on (a) and (b) since problem (c) is visible while problem (d) and (e) can be detected by hearingrepparttar 141802 arcing sound generated byrepparttar 141803 flyback transformer. Problem (f) can be checked with multimeter set torepparttar 141804 highest range measured from anode to ABL pin while (g) can be solved by adding a new monitor blur buster (For 14' & 15' monitor only.) Problem (h) can only be tested by substituting a known good similar Flyback Transformer. Different monitor have different type of flyback transformer design. Problem (i) can be checked using an ohm meter measuring between primary and secondary winding. A shorted turned or open in secondary winding is very uncommon.

What type of symptoms will appear if there is a shorted turned in primary winding? a) No display (No high voltage). b) Power blink. c) B+ voltage drop. d) Horizontal output transistor will get very hot and later become shorted. e) Along B+ line components will spoilt. Example:- secondary diode UF5404 and B+ FET IRF630. f) Sometimes it will causerepparttar 141805 power section to blow.

What type of symptoms will appear if a capacitor is open or shorted in a flyback transformer?

Capacitor shorted

a. No display (No high voltage). b. B+ voltage drop. c. Secondary diode (UF5404) will burned or shorted. d. Horizontal output transistor will get shorted. e. Power blink. f. Sometimes power section will blow, for example: Raffles 15 inch monitor. g. Power section shut down for example: Compaq V55, Samtron 4bi monitor. h. Sometimesrepparttar 141806 automatic brightness limiter (ABL) circuitry components will get burned. This circuit is usually located besiderepparttar 141807 flyback transformer. For example: LG520si

Capacitor open

Install It Right & Sleep Good At Night

Written by Jackson Morgan

You may reprint or publish this article free of charge as long asrepparttar bylines are included.

Original URL (The Web version ofrepparttar 141670 article)


href="http://www.defendingthenet.com/NewsLetters/InstallItR Install It Right & Sleep Good At Night



Install It Right & Sleep Good At Night

Why Is My New Computer So Slow?


You know it’s funny, buying a new system can be a great experience, but I run into so many people ready to throw their brand new “Piece of trash” out 3-6 months later. Overrepparttar 141671 years I have received a lot of phone calls saying: “How come my PC is sooooo slow, I just bought it”. “When I first got my new system it was fine, but now I can’t get on line” And my all time favorite, “Uhh, I got a message that said something like, you need to install something, or something will happen afterrepparttar 141672 next time you do something”..........

So why does this happen?


Well that’s actually quite easy to answer. Most images supplied from vendors come with an average of seven unwanted/unneeded applications. They run inrepparttar 141673 background trying to make you register this, upgrade that, or perform a job that your OS (Operating System) already does on its own. It’s amazing how easy it is to exhaust your system resources with a few shoddy programs.

Ask any technician andrepparttar 141674 majority (if not all) will tell you; when buying a new system whether for home or office they “wipe it”, “kill it”, spank it” (Technical terms for formattingrepparttar 141675 hard drive:), before they ever use it.

Also, some PC’s may sit for six months to a year atrepparttar 141676 store before they actually seerepparttar 141677 light of day. During this time, new bugs and vulnerabilities may be discovered. Updating your system as soon as it hitsrepparttar 141678 internet is a must.

That’s right Toto, Spyware, Viruses, and Worms oh my…. Their out there and waiting for new machines with old installs.

Other workstations may simply need a boost in RAM (Random Access Memory) Vendors cut prices to sell inventory but they also cut hardware where they can. Adding memory to your system isrepparttar 141679 easiest way to increase your systems potential. However, if you feel your hardware is adequate and you still see a decrease in system performance, you may need a complete re-installation of your OS.

So how do I do it?


Vendors make it sound easy with their re-installation or recovery CD. But, this will leave you inrepparttar 141680 same situation of poor computer performance that lead you to this article inrepparttar 141681 first place. Unfortunately in order to re-install or re-imagerepparttar 141682 correct way, you really need a professional technician. But, in case you haverepparttar 141683 right tools, and your feeling confident; let me give you a brief tutorial on proper installation.

Under these instructions I will assume you have a general knowledge of hardware and software and are able to obtain repparttar 141684 tools needed for a proper installation.

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