The complaint for this Samsung 510BN LCD screen was no power, after the cover was opened I discovered that the power filter capacitor still hold some cost and the voltage was rather high. Smart Led Bulbs by right the filter capacitor kept voltage must be discharge in less than 10 secs. This indicates that there was something not right in the circuit. If you occur to fix this kind of power problem, make sure you release the filter capacitor first prior to examining others components. After the filter capacitor voltage currently released, I used cock smith flyback tester to determine throughout the key winding of the switch setting power transformer to see if there are any short circuit took place.
The outcome of the examination was the flyback tester LED light all goes off which implies there have to be parts shorted either in the primary or additional area, in some cases the main winding can go shorted. A shorted power ic (this monitor is using the 4 pins 5L0365R power ic) in the main section or a shorted diode in the secondary section would pull down the flyback tester LED bar to the minimum.
If the flyback tester LED have 8 complete bars, this suggests that the parts such as power ic (power fet if have), power transformer primary winding and also all the second diodes are not shorted. To isolate if the shorts is either in the main or secondary area, you must desolder the power transformer. Inspect the main winding of the power transformer off board first before you test on all the second diodes utilizing analog meter set to times 10 K ohm.
In this Samsung 510bn LCD monitor power supply, the triggered of the no power and filter capacitor take longer time to discharge was due to a shorted secondary diode which is from the schottky type with the component number of SB5H100. Searching the web, I found this diode technological datasheet; it is a 100Volt 5A schottky diode.
After the replacement the LCD check job flawlessly great! Whether you are troubleshooting the Samsung 510BN Lcd display power supply or any sort of switch setting power supply, generally the treatment of testing it is the same. Of course there are many more techniques to locate the shorted secondary diode such as directly evaluate the diodes, but this method can check for elements shorted also without touching the soldering weapon.
This implies, if the flyback tester shown 8 full bars, after that do not lose your time to check on all the additional diodes once more. Obtain one penis smith flyback tester as well as you might see how valuable this meter remains in doing selection test for you such as inspecting the computer system display B+ coil, flyback transformer, crt straight yoke coil, ballast as well as many more.
If the flyback tester LED have 8 complete bars, this means that the components such as power ic (power fet if have), power transformer key winding as well as all the second diodes are not shorted. In this Samsung 510bn LCD keep track of power supply, the caused of the no power as well as filter capacitor take longer time to release was due to a shorted second diode which is from the schottky type with the part number of SB5H100. Whether you are fixing the Samsung 510BN Lcd screen power supply or any kind of kind of switch setting power supply, primarily the procedure of screening it is the exact same.