Computer Hardware Help
Articles To Save You From Computer Hardware Nightmares!
Computer Hardware Help Article:
Flyback Transformer-How to Locate the ABL Line
From experienced, usually capacitors shortedand resistor turned into high ohms were the caused of the problem. A video pre-amplifiercan also be defective. To confirm whether is circuit or ic problem, just solder out the contrast pin and switch on the monitor. If the monitor display normal picture (contrast ok)then suspect the abl line circuit. If it remainthe same (dim contrast) replace the videopre-amp will usually solve the problem.
The contrast signal came from one of the pin(leg) of a flyback transformer which we calledit as abl pin. Many technicians have the difficulty to trace the abl pin becauseusually a flyback transformer consist of around10 pins. Some pins are B+, GROUND, AFC, ABL,X-RAY PROTECT, VCC, to HOT, HEATER, horizontalcentering and etc. But there is one and simpleway that i'm gone to show you how to locate theabl pin. Use two analog multimeters set to x10kohmrange. Connect it in series (+ probe to - probe)and measure the flyback transformer from anode(the red cap) to all of the pins under theflyback. You have to desolder all the pin orjust remove the flyback from the mainboard in order to get an accurate reading.
If either one of the pin shows a diodereading that is the abl pin. The reason we usetwo multimeters is because the flyback circuitinternally have couple of high voltage diodesconnected in series. If you have a schematic diagram or any monitor or television troubleshooting book, you will see that theinternal flyback diode are connected in series.By connecting two meters the ouput from the probeis around 24 VOLTS which is enough power to checkthe flyback internal diodes. After you have determined the abl pin, you can proceed to followthe line and find the bad components that cause the contrast problem.
Television or tv flyback transformer generallyhave the same design compare to monitor flyback.Whether it is a montblanc flyback transformer,rca, mitsubishi or sony flyback the checkingusually is the same.
Jestine Yong is a electronic repairer and a writer. For more electronic repair information please visit his website at www.noahtec.com/electronic-repair-articles.htm
Related Computer News and Articles From ezinearticles
At first glance, it would appear the market is being saturated by a constant influx of new Apple generation products. The continuing legacy of the iPod and, more recently, the iPhone has seemingly contributed to - if not provoked - a society that is entirely dependant on its music. With the release of the original, 1st Generation iPod Touch, and its later partner, the 4th Generation iPod Nano, the world has witnessed a multitouch revolution.
Long before, laptops are big, bulky and heavy. As part of the modernization, people buy these computers to conveniently take their files and work everywhere they want to go. As time passed, these devices became more thin, light and contains more features resulting to more uses. Feel free to discover more about laptops.
How video hardware works on your laptop. A guide for the convenience and enjoyable usage of your laptop with the help of your hardware.
What are eco-friendly printers? What makes them different? Is there any downside to using them?
There are many factors to consider when making a decision on which CD printer to purchase for your business. This article will touch on a few of the basics like choosing the right printer manufacturer, cost of the CD printer, inkjet or thermal, productivity, speed, and durability. The goal of this article is to give you a basis for making the best decision when purchasing a CD printer so you get it right the first time.
You Can Own This Website!
This website is an example of a new product called article site manager developed especially for people who wish to own Adsense sites or sites to promote their own websites and products but do not have the technical ability to own or maintain a website.
Details about this site and other article sites in different categories can be found at the link below. Prices start at $259 for a complete website like this
Related Computer Hardware Articles:
The simple rule of thumb is that whatever you have stored as a file on any other storage medium can also be stored as a file on a CD-ROM. To the recorder, a file is a file, and an ISO doesn't care whether or not the file contains pictures, text, or even audio sound.
How to Choose a New Hard Drive for Your Computer
Making a more careful decision about the hard drive can mean a much longer working life for the hard drive. Better reliability, allowing the hard drive to run for many years without mechanical failures or the worst of all, losing your precious data to errors on the drive.
Special Events Recording in DVD Players Age
Digital era prompted people to make critical choices. Videotapes' life came to an end as the DVDs and DVD players appeared and replaced them by and large. To meet the emerging needs, new services and new jobs showed up, drawing out a growing industry.
USB Key Drives, Thumb Drive, USB Pen, Key Drive, Microdrive, Flash Drive.
Do not upgrade your very old PC because it would cost a lot of money. It's cheaper to buy a new computer in such cases because they are easier to upgrade later.
Welcome LCD displays-the computer monitors of the present and future. From year to year these computer peripherals tend to get smaller and thinner in size with twice the power and benefits. Well, stay on the look out for more to come because I am certain that our current flat monitors have not reached their journey's end yet. An LCD (which stands for liquid crystal display, by the way) works much differently than your CRT, mostly because they don't project light, and therefore use much smaller units during display.