Samsung 153V Lcd Monitor Power provide repair Tips

Troubleshooting Samsung 153V Lcd power provide is just like troubleshooting those crt type. This monitor came in with no power symptom. If you are first time repairing this type of power supply, I recommend you to first take off the switch mode power transformer. Then test every single component in the customary section, before you continue to check the secondary section. You have to be good in testing basic electronic components in order to detect the fault.

You can always browse straight through my website just in case you do not know how to test basic electronic components. If you do not know the right way to check, you might miss out a bad component and this will lead you not able to solve the problem. After considered checking all the components in the power provide section, I found the filter capacitor do not have any reading using digital capacitance meter (open) , the two round type fuse also open circuit, 1N4744 15 Volt zener diode short circuit and lastly the power ic Top247F blown! Testing the switch mode power provide customary winding with a dick smith flyback tester shown green bar which indicated good winding.

Problems With Samsung

What we left here were the secondary diode and filter capacitor. Upon checking them with analog meter and esr meter, found all of them to be good condition. Other area like main board and inverter board also looks okay (Power failure rarely influence these two circuit). Now we have confirmed that only five components found to be faulty. One by one the components were substituted (except one fuse) and just before you switch on the power supply, make sure you join together a 100 watt light bulb over the live ac line-refer to the photo at my website. Once it is done you can then march to switch on the Lcd monitor to look at the radiance of the bulb.

Samsung 153V Lcd Monitor Power provide repair Tips

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*** Product Information and Prices Stored: Feb 09, 2012 17:57:42

If it very bright, this suggests that there are still short circuit somewhere in the power section. If it dim or totally goes off, you can now place your red probe to the secondary side to check if any dc present at their respective line. If there are Dc voltages present at the output, you can switch off the power, extraction the filter capacitor (for protection purposes), take off the light bulb and join together back the new fuse to its customary location.

You are now hundred percent sure that the Lcd power provide won't blow once you switch it on. By the way the filter capacitor is rated at 105 Celsius and you cannot replace it with the 85 Celsius type otherwise it may open up again after using for concentrate of weeks or months. The ventilation in Lcd monitor is not as good as the cathode ray tube monitor, because the power provide is fully covered by a large aluminum plate and it can get hot pretty fast. Conclusion, either you are repairing Samsung 153V Lcd power provide or other brand of Lcd monitor, the policy is the same. Who knows the power problem in this monitor is a coarse fault and in the time to come you can tackle this brand of power provide in the shortest time. To part electronic components is not that difficult, but to get the customary parts like the power ic will consume you lots of time.

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Samsung 713N Lcd repair with Se7889-Lf ic qoute

This Samsung 713N Lcd monitor came in with no display indication of illness and no power. In other words, once you switched 'on' you could see the power Led lights up (no display) and then for couples of seconds the power led light goes off. When I removed the signal cable and switched 'on', now I could see the check signal cable Osd appeared at the screen. This proved that the inverter board, lamp and power furnish is working. Again, I plugged in the signal cable, the display and power Led light went off.

After opened up the cover, I check the on/off signal from the mainboard to the inverter board. With signal cable in, there was no on/off signal to the inverter board but when the signal cable was disconnected, you could see clearly from your meter there is a on/off signal going into the inverter board thus the display appeared with the check signal Osd gift at the display. From this test, it is very certain is the main board problem.

Problems With Samsung

To confirm either is the main board problem, you have to use a similar Samsung 713N model to confirm it. True enough, after substitution with a known good board, the monitor is okay. So now we can confirm is the mainboard faulty. The real problem now is at where we can find this board or the suspected part estimate Se7889-Lf ic for replacement? Checking the components surrounding the Se7889 ic yield no result.

Samsung 713N Lcd repair with Se7889-Lf ic qoute

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*** Product Information and Prices Stored: Jan 09, 2012 22:53:46

As mentioned in former articles, to troubleshoot Lcd monitor is easy but to get the part is a microscopic bit difficult. Samsung don't sell you the mainboard, if you send to them for repair, they will payment a very high price which is not worth to repair.

As I'm writing this article, I still could not uncover the suspected ic, but if I found it I will let you all know. Samsung 510bn lcd monitor also have this kind of problem which is the mainboard spoilt.

Although in this report I could not pinpoint to you the exact faulty component, at least you would use my policy to confirm which board is giving problem. In other words, either you are troubleshooting the Samsung 713N Lcd monitor or other brand, the testing method is the same.

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