How To Troubleshoot And Restore DELL E151FP LCD Monitor With No Energy Drawback
The DELL E151FP LCD Monitor got here in with no energy symptom and upon opening up the cover I noticed few elements that have been burnt. R623 (4.7 ohm) burnt on the facet and you can still recognized the resistor shade code. The current sense resistor (0.68 ohm) outer layer partly had got here off and barely burnt and the filter capacitor c605 (68uf 400v) one of many pins had turned rusted and came off once I tried to desolder the pin.
This isn't a new mannequin and I consider lots of skilled techs had solved the problem. However for individuals who haven't come across this downside, chances are you'll use the procedure to troubleshoot and restore another type of LCD Monitor with energy problem.
I'll first remove the facility transformer and ensure it rings okay with dick smith flyback tester. I do that first as a result of I do not wish to waste my time checking different parts and later solely discovered that the ability transformer is the triggered of the ability problem. Once it rings okay I will measure all of the secondary diode. To your data most LCD Monitor energy provide extensively used the twin schottky kind diodes and the specification normally in the 10 to 20 amp with about 40 volts. Nevertheless I do come across some designed are nonetheless makes use of the extremely fast recovery sort diodes within the secondary section. Make sure you know find out how to examine a standard diode and a schottky diode. Refer back to my website in the diode section and search for testing schottky diode article. I'll then examine for the ESR of electrolytic capacitors too.
Once I confirmed that the secondary side components are all examined okay, I might then proceed to remove all of the parts in the primary side. Some parts in the main aspect you'll be able to verify on board just like the bridge rectifier and fuse. If I am new to the LCD Monitor mannequin I would verify all parts off board (with a lead faraway from board). With this manner you will be positive that every one elements you will have scanned through.
These are the elements that I discovered defective; fuse-2A, R615-0.68 ohm, R613- 1K, R612-forty seven ohm, R623-4.7ohm, D604-1N4148, Q601-SSS6N60A, C605-68UF 400V and IC601-UC3842B. Total was nine components and it took me less than 20 minutes to verify all of the components in primary side. Now's the time to search for spare parts. After spending about 5 minutes in the spare part compartment I managed to search out all elements besides the facility fet SSS6N60A.
Though this part quantity is generally utilized in change mode energy provide, my electronic supplier does not have this stock. I might then browse through the semiconductor databook to seek for equal half number. From the book, it suggests to make use of the K1118 as replacement. After all components have put into their unique place or location and naturally with the power transformer soldered, I do not instantly change on the facility supply. I would first use a 100watt light bulb linked in collection with the stay line. The most effective place to put the light bulb is the fuse holder area. Remove one of many fuse lead and connect the light bulb throughout it. Power it on and begin to look at the bulb. If it brightly lit and stay that approach then there's still downside within the energy supply. However, if the bulb doesn't light in any respect then it is a good sign that the power provide could also be working.
Use a multimeter to place at the secondary aspect with power on. In case you get some accurate voltage studying from the outputs and the bulb doesn't gentle in any respect, then this confirmed that the facility provide is working. Swap off the facility supply and join back the fuse and turn the LCD Monitor on again. I am very sure the LCD Monitor will now work.
Whether you are troubleshooting the DELL E151FP LCD Monitor or different brands, you may all the time use the process given above to repair the power supply problem. This methodology can be even use to restore different sorts of energy provide too. No matter what types of power supply you're troubleshooting, just ensure you know the way to verify and check the essential digital components. In case you ever miss one, unhappy to say you would not be able to remedy the problem or it would simply take you many of your valuable hours to complete the job. Completely happy searching!
How To Troubleshoot And Restore DELL E151FP LCD Monitor With No Energy Drawback
The DELL E151FP LCD Monitor got here in with no energy symptom and upon opening up the cover I noticed few elements that have been burnt. R623 (4.7 ohm) burnt on the facet and you can still recognized the resistor shade code. The current sense resistor (0.68 ohm) outer layer partly had got here off and barely burnt and the filter capacitor c605 (68uf 400v) one of many pins had turned rusted and came off once I tried to desolder the pin.
This isn't a new mannequin and I consider lots of skilled techs had solved the problem. However for individuals who haven't come across this downside, chances are you'll use the procedure to troubleshoot and restore another type of LCD Monitor with energy problem.
I'll first remove the facility transformer and ensure it rings okay with dick smith flyback tester. I do that first as a result of I do not wish to waste my time checking different parts and later solely discovered that the ability transformer is the triggered of the ability problem. Once it rings okay I will measure all of the secondary diode. To your data most LCD Monitor energy provide extensively used the twin schottky kind diodes and the specification normally in the 10 to 20 amp with about 40 volts. Nevertheless I do come across some designed are nonetheless makes use of the extremely fast recovery sort diodes within the secondary section. Make sure you know find out how to examine a standard diode and a schottky diode. Refer back to my website in the diode section and search for testing schottky diode article. I'll then examine for the ESR of electrolytic capacitors too.
Once I confirmed that the secondary side components are all examined okay, I might then proceed to remove all of the parts in the primary side. Some parts in the main aspect you'll be able to verify on board just like the bridge rectifier and fuse. If I am new to the LCD Monitor mannequin I would verify all parts off board (with a lead faraway from board). With this manner you will be positive that every one elements you will have scanned through.
These are the elements that I discovered defective; fuse-2A, R615-0.68 ohm, R613- 1K, R612-forty seven ohm, R623-4.7ohm, D604-1N4148, Q601-SSS6N60A, C605-68UF 400V and IC601-UC3842B. Total was nine components and it took me less than 20 minutes to verify all of the components in primary side. Now's the time to search for spare parts. After spending about 5 minutes in the spare part compartment I managed to search out all elements besides the facility fet SSS6N60A.
Though this part quantity is generally utilized in change mode energy provide, my electronic supplier does not have this stock. I might then browse through the semiconductor databook to seek for equal half number. From the book, it suggests to make use of the K1118 as replacement. After all components have put into their unique place or location and naturally with the power transformer soldered, I do not instantly change on the facility supply. I would first use a 100watt light bulb linked in collection with the stay line. The most effective place to put the light bulb is the fuse holder area. Remove one of many fuse lead and connect the light bulb throughout it. Power it on and begin to look at the bulb. If it brightly lit and stay that approach then there's still downside within the energy supply. However, if the bulb doesn't light in any respect then it is a good sign that the power provide could also be working.
Use a multimeter to place at the secondary aspect with power on. In case you get some accurate voltage studying from the outputs and the bulb doesn't gentle in any respect, then this confirmed that the facility provide is working. Swap off the facility supply and join back the fuse and turn the LCD Monitor on again. I am very sure the LCD Monitor will now work.
Whether you are troubleshooting the DELL E151FP LCD Monitor or different brands, you may all the time use the process given above to repair the power supply problem. This methodology can be even use to restore different sorts of energy provide too. No matter what types of power supply you're troubleshooting, just ensure you know the way to verify and check the essential digital components. In case you ever miss one, unhappy to say you would not be able to remedy the problem or it would simply take you many of your valuable hours to complete the job. Completely happy searching!
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