DellDriverTM.com is a web-site that focus on furnishing Dell’s newest Drivers possibly for Printers, Laptops, or even Monitors. Get the newest Dell Drivers right here from our web site.
Troubleshooting DELL E173FPB Lcd Monitor with electricity blink symptom is rather uncomplicated if you know the ideal treatment to examination it. There are two sections in the monitor that can bring about power to blink. It is both key or secondary area or even sometimes both of those sections can be defective. So to isolate as which section is giving difficulty. I utilised an vehicle 12 volt light bulb (brake gentle) and link it concerning the 12 volt provide line and chilly floor with the fuse taken off. If the bulb still blink chances is pretty high the electricity key part have dilemma.
Do not neglect the other voltages line as effectively this sort of as the 3.3 and 5 volts. If any elements shorted that receives the supply from the 5 and 3.3 volts, the ability also may perhaps blink. If the 12 volts bulb lights up we can think that the electric power supply is working good and a thing shorted even more down the line that tends to make the energy supply to blink. If the bulb lights and you carry on to test the ability section, it will be going to squander your time. You should now concentrate on the secondary section circuit these as the 4 transistors C5707 that travel the higher voltage transformer in the inverter board.
Just believe these transistors like horizontal output transistor (Hot) in the CRT monitor that push the flyback transformer wherever it worked so really hard and likelihood for it to breakdown is very substantial. Checking the four transistors off board observed just one of them have a shorted looking at with an ohmmeter.. This transistor can get faulty by alone or it could be some others elements that caused it to acquire a brief circuit this kind of as a faulty high voltage transformer but all of the four higher voltage transformers checked to be okay with ringer and ohmmeter exam.
Now, here is the top secret that I’m heading to reveal. If you just swap the defective transistor only, chances is really superior the transistor or another C5707 transistor will breakdown again. Typically what a technician does is to check the other transistors with possibly an analog or digital meter. If you use both meters to test the transistors then you have missed out on the faulty transistor since each meters would not expose to you the hfe reading through of the transistors. Only some electronic meters have the hfe examining attribute. In other text, you have to use exam the hfe reading through of a transistor. Although you can switch the other 3 transistors right, why not we do some detective do the job to locate the bring about of the problem?
Applying the Peak digital atlas component analyzer, I could evidently see the various among a fantastic and a negative transistor. A excellent C5707 transistor has hfe looking at from 320 to about 390 but the negative a single reads 467! The other two C5707 transistors have studying about 350. In the earlier mentioned case only two C5707 transistors ended up replaced and you help save the other two. I experienced burn off in take a look at this Lcd monitor for numerous times and it worked beautifully fantastic.
Conclusion- Whether or not you repair the DELL E173FPB Lcd Monitor or any other model these types of as the E172FPB or E171FPB, fundamentally the testing method is the exact. You could also use this tests treatment on other brand name of Liquid crystal display Monitor much too.
Download the Dell Drivers that you will need from this download link