Understanding Monitor Flyback Transformers Internal Capacitor

By Jestine Yong

Troubleshooting Monitor flyback transformers is not difficult if you know what is inside the flyback. Normally for a monitor flyback transformer, it consists of the casing, winding, pins, high voltage cable, anode cap, divider, epoxy and a high voltage capacitor. Among all, the internal capacitor gave the most problems. If this capacitor value out or short circuited, the monitor will have no high voltage and high voltage shut down and sometimes even blow the power section. That’s why, whenever before you want to check any power problems or horizontal out transistor (HOT) that had developed a short circuit; you must always confirm first that the flyback transformer internal capacitor is working. Otherwise, after the replacement of components, the monitor would not work or sometimes the same components that you had changed would blow again.

Although every monitor flyback transformers have different designed, the method of measuring it is the same whether it is a Samsung, Philips, Likom and etc. Connect the digital capacitance probe from the anode cap to the bottom pin as shown in the photo. A good capacitor value should be from 1.5 nanofarad to 4.5 nanofarad. Acer 14 and 15” monitor usually measured 1.5-1.6 nanofarad whereas 17” and above flyback usually in the range of 2.7 nanofarad to 4.5 nanofarad. Some 21” monitor flyback have the reading of 6 nanofarad.

A good dynamic focus capacitor usually has the capacitance value from 0.5 to 1 nanofarad. If these capacitors values run, you may have some problems adjusting the focus. In other words, you just can’t tune to a sharp picture no matter how hard you have tried it. You can test these dynamic focus capacitors by connecting a digital capacitance from the horizontal or vertical focus wire to one of the two pins under the flyback divider.

Many monitor repairers tried to fix a flyback transformer without success. Some called it as refurbish flyback. The reason for their failure in repairing the flyback is because of the bleeder resistor inside the flyback. Some technicians called it as feedback resistor. If you just remove the flyback internal capacitor pin and if that flyback have a bleeder resistor in it, the monitor will go into high voltage shutdown mode. Be careful when you want to do refurbishing flyback.

Get Monitor flyback transformers schematic diagram to make you familiar with the components inside the flyback. See how the internal capacitor and bleeder resistor are connected. How a primary and secondary winding are drawn and get to know the design of different flyback manufacturers as well. In this article I would not show you how to remove flyback transformer because I expect you already knew how to take it out.

Conclusion-Just practice more often on how to test a flyback transformer, and use a dick smith lopt tester to check the winding. It wouldn’t take long for you to become very good in checking flyback transformer. By the way, testing the internal capacitor with a digital capacitance is not 100 % accurate because the internal capacitor have the voltage rating of about 30 to 35 kilovolt and the output voltage produced by your meter only in couples of volt. The best flyback transformer tester on earth is actually the Monitor or the TV itself. When you switch on, if the monitor working then the flyback is in good condition and if you heard “tic”-“tic” or arcing sound, most probably you need to check or refurbish the flyback transformer. Have a great day my friend!

Jestine Yong is a electronic repairer and a writer, for more monitor repair information, please visit his website at http://www.electronicrepairguide.com/computer-monitor.html

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Five Reasons Why Your 3rd Generation iPod Battery is Worth Replacing

By Anthony Magnabosco

As the owner of a popular third-party iPod battery replacement business, I have the privilege of being able to speak with many iPod owners on a daily basis. It always amazes me how many customers with a 3rd Generation iPod proclaim that it is simply the best iPod that Apple ever made.

About the only thing that I don’t like about the third generation iPod is its’ inability to charge over USB – but I digress.

As it turns out, the very first MP3 player that I ever owned was a 3rd Gen iPod, and I have to agree that it was the most successful product in the iPod family. Here are five reasons why I think this to be the case:

First, the third generation iPod was released in a variety of hard drive sizes: 10GB, 15GB, 20GB, 30GB, and 40GB capacities. This variation in capacity allowed consumers to select a player that not only fit their storage requirements, but also their budget. Never before could you buy a digital music player that let you to store up to 20,000 songs before on one portable device and slip it in your pocket.

Secondly, the 3G iPod has one of the best interfaces ever conceived. If you are not familiar with the layout, the 3rd Generation iPod has an all-white front (including an all-white ScrollWheel) and a metallic silver back. The location of the navigation buttons are not on the ScrollWheel, like you find on more recent models, but instead appear above the scroll wheel and below the LCD. This is a big deal: many people that I have spoken with absolutely love the buttons in this location, as they allow for faster navigation and volume control adjustments, perfect for folks on the go or in the midst of a killer workout.

Frankly, I would not be surprised if Apple eventually integrated a 'virtual' ScrollWheel into the display of the iPhone or future iPod models like you often see on rumor-mill mock-ups, but give users the ability to select the 'classic' 3rd gen iPod ScrollWheel layout in addition to the more recent scroll wheel design.

Next, although the third gen iPod suffers from the same iPod battery issues as all of the other models before and after it (the lithium-ion battery will eventually lose its' ability to maintain a charge), this cool model was designed with has a tad more space inside the unit. This extra space is perfect for installing a longer-lasting third generation iPod battery that can far outperform the original stock battery that came inside the unit, often hours and hours more playtime.

Fourth, although the 3rd Generation iPod cannot display photographs or play video like its’ younger siblings, it is in my opinion is one of the most durable iPods ever built. The hard drive inside a 3rd gen iPod is completely ensconced in protective padding to absorb shock and other mild abuse you might throw at it. Furthermore, the screen on this model is much more scratch-resistant than you might find on an early version of the iPod nano, for example.

Finally, the 3rd Gen iPod just feels right in you hand - it's the perfect weight, perfect size, and holds the perfect amount of music for the casual listener to the serious audiophile.

Anthony Magnabosco is the Owner of Milliamp LTD. For more information about a strong iPod battery for your 3rd Generation iPod or any other model, please visit http://www.ipodjuice.com Milliamp LTD and the ipodjuice.com website are in no way associated with Apple Computer, Inc. 'Apple' is a trademark of Apple Computer, Inc., registered in the U.S. and other countries. 'iPod' is a registered trademark of Apple Computer, Inc.

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