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No Matter If You Are Troubleshooting The DELL E151FP LCD Monitor Or Other Brands, You'll Be Able To At All Times Utilize The Process Given Over To Repair The Power Supply Situation
The DELL E151FP LCD Keep track of arrived in with no energy symptom and upon opening up the cover I observed few components that had been burnt. R623 (4.7 ohm) burnt in the aspect and you can still recognized the resistor color code. The current sense resistor (0.68 ohm) outer layer partly had arrived off and a bit burnt plus the filter capacitor c605 (68uf 400v) among the pins had grew to become rusted and came off when I attempted to desolder the pin.
This isn't a brand new model and I think lots of skilled techs had solved the issue. But for those who have not come across this trouble, you may use the procedure to troubleshoot and fix another sort of LCD Keep track of with power problem.
I'll initial get rid of the power transformer and ensure it rings alright with dick smith flyback tester. I do that initial mainly because I don’t desire to waste my time checking other components and later only discovered out which the energy transformer may be the brought on from the energy dilemma. As soon as it rings alright I'll measure all of the secondary diode. For the details most LCD Monitor power provide widely applied the twin schottky type diodes and the specification commonly inside the ten to 20 amp with about 40 volts. Even so I do run into some designed are nonetheless makes use of the ultra quick recovery type diodes in the secondary part. Be sure that you realize easy methods to verify a typical diode along with a schottky diode. Refer back to my internet site in the diode section and search for testing schottky diode write-up. I will then examine for your ESR of electrolytic capacitors also.
Once I confirmed the secondary side components are all tested okay, I would then proceed to remove all of the elements in the primary side. Some elements in the main facet you'll be able to check on board such as the bridge rectifier and fuse. If I’m new towards the LCD Keep track of design I'd check all components off board (with a lead removed from board). Using this type of way you are going to be sure that all elements you've scanned by means of.
They are the components that I found faulty; fuse-2A, R615-0.68 ohm, R613- 1K, R612-47 ohm, R623-4.7ohm, D604-1N4148, Q601-SSS6N60A, C605-68UF 400V and IC601-UC3842B. Complete was nine elements and it took me much less than twenty minutes to examine all the components in primary facet. Now may be the time to search for spare elements. Just after investing about 5 minutes in the spare component compartment I maintained to acquire all elements apart from the energy resistor color code. Although this part number is mainly employed in switch mode energy supply, my electronic supplier doesn't have this stock. I'd then browse via the semiconductor databook to research for equal component amount. From your ebook, it suggests to make use of the K1118 as substitute. Right after all components have put into their authentic location or place and certainly using the energy transformer soldered, I don’t instantly change on the energy provide. I'd initial utilize a 100watt light bulb connected in series with the reside line. The perfect place to put the light bulb will be the fuse holder location. Get rid of one of the fuse lead and connect the light bulb throughout it. Power it on and begin to observe the bulb. If it brightly lit and stay that way then there is nonetheless issue inside the power supply. Having said that, if the bulb does not light whatsoever then this can be a very good indicator the energy supply could possibly be operating.
Use a multimeter to location at the secondary facet with power on. If you ever get some correct voltage studying through the outputs and the bulb does not light at all, then this confirmed the power supply is working. Change off the power provide and connect back the fuse and flip the LCD Monitor on once more. I’m incredibly certain the LCD Monitor will now function.
No matter if you might be troubleshooting the DELL E151FP LCD Monitor or other brands, it is possible to continually utilize the process given over to repair the energy supply challenge. This method is usually even use to repair other forms of power supply too. No matter what sorts of power provide you might be troubleshooting, just be certain you realize ways to verify and test the fundamental digital elements. If you happen to ever before miss one, depressing to say you would not have the ability to solve the problem or it might just consider you numerous of your valuable hours to complete the work. Pleased hunting!
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