Troubleshooting Lcd monitor power furnish pack is easier than the crt monitor power supply. It is small and ageement and normally has only one output which is 12 volt and range from 2 ampere to over 4 ampere. Some designed have 18 and 24 volts also. Nowadays most Lcd power supplies are build into the main board such as the Dell E151Fp Lcd Monitor while the older type were separated as power pack module.
The power pack module type is easy to diagnose because you can replace other working unit just to make sure is the power pack that giving problem. You may also use an external dc power furnish to power up the Lcd to confirm if the power pack is faulty. If you do not have the external dc power supply, you can all the time use this method to cut off the question especially the symptoms are no power, low power and power blink. Using the rear light bulb (12 volt) from a car and connect it to the power pack output jack. If it light brightly then the power pack is okay. If it blink or dim the power pack have problem. Why have to use this method to test it? Because, if there are components shorted or leaky at the Lcd main board, it will influence the power furnish performance.
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From experienced, most of the Lcd power furnish problems either in the power pack or built into main board were due to the failure of electrolytic capacitors (most probably due to heat) in the former and secondary section. Most of the capacitors have a high Esr which causes the power furnish to yield low output, blink or no power at all. Typical value electrolytic capacitors in the former side are 47 and 100 micro farad 50 Volt and the secondary sides are 1000 to 2200 micro farad 25 volt. Sometimes you can see the capacitor top casing became bulge and the sleeve that covered the capacitor casing turned into darker color like brownish.
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The power section in some of the Lcd screen are still using the Uc3842 pulse width modulation (pwm) ic. This type of ic is quite easy to find in the store assess to some power ic which is very difficult to get. Samsung 153V Lcd monitor is using the Top247F power ic which is quite easy to troubleshoot if power fail in this model. Some power pack that came in only have minor burnt and after cleaning it and replaced the fuse, it will work as good as the new one.
Troubleshooting Lcd power furnish is not that difficult in case,granted if you know how a power furnish work. If you are unsure of how to troubleshoot power supply, I urge you to read all my power furnish articles at the power furnish page. I will continue to post more power supplies articles at that page and hope you could drop by more often to check out my website.
mend Lcd Power supply The Easy WayFacebook Parenting: For the troubled teen. Tube. Duration : 8.38 Mins.Warning: Since this video seems to have gone crazy, I figure I'll post this notice. I'm going to read a letter my 15 year old daughter wrote. There ARE some curse words in it. None of them are incredibly bad, but they are definitely things a little kid shouldn't hear... not to mention things MY KID shouldn't say! If you want to see the original Facebook thread, it's located at: www.facebook.com ---------------------------------------------------------------------------------------------- My daughter thought it would be funny/rebellious/cool to post on her Facebook wall just how upset she was and how unfair her life here is; how we work her too hard with chores, never pay her for chores, and just in general make her life difficult. She chose to share this with the entire world on Facebook and block her parent's from seeing it. Well, umm... she failed. As of the end of this video, she won't have to worry anymore about posting inappropriate things on Facebook... Maybe a few kids can take something away from this... If you're so disrespectful to your parents and yourself as to post this kind of thing on Facebook, you're deserving of some tough love. Today, my daughter is getting a dose of tough love. © Copyright 2012, by Tommy Jordan. All rights reserved. Duplication without express permission of the author is prohibited.
Keywords: Facebook, Teens, Parenting, disrespect
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