510bn Samsung LCD Power Supply Restore Secrets and techniques
The criticism for this Samsung 510BN LCD monitor was no power, after the quilt was opened I found that the facility filter capacitor still hold some cost and the voltage was fairly high. A very good monitor by proper the filter capacitor saved voltage must be discharge in lower than 10 seconds. This means that there was something not proper within the circuit. When you occur to restore the sort of energy drawback, be sure you discharge the filter capacitor first earlier than checking on others components. After the filter capacitor voltage already discharged , I used dick smith flyback tester to measure throughout the primary winding of the swap mode power transformer to see if there are any quick circuit occurred.
The results of the take a look at was the flyback tester LED mild all goes off which means there must be parts shorted either within the major or secondary section, generally the primary winding can go shorted also. A shorted power ic (this monitor is using the 4 pins 5L0365R power ic) within the major 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 full bars, which means that the parts such as power ic (power fet if have), energy transformer major winding and all the secondary diodes aren't shorted. To isolate if the shorts is both within the major or secondary section, you must desolder the power transformer. Examine the first winding of the facility transformer off board first before you take a look at on all of the secondary diodes using analog meter set to instances 10 Okay ohm.
A shorted diode will show two studying registered at the analog meter. On this Samsung 510bn LCD monitor power provide, the triggered of the no energy and filter capacitor take longer time to discharge was resulting from a shorted secondary diode which is from the schottky kind with the half number of SB5H100. Looking the web, I discovered this diode technical datasheet; it is a 100Volt 5A schottky diode. This shorted diode is situated at the 12 volt rail which implies it converts the ac to 12 Volt dc.
After the substitute the LCD monitor work perfectly fine! Whether or not you are troubleshooting the Samsung 510BN Lcd monitor power provide or any kind of change mode energy supply, basically the procedure of testing it's the same. Of course there are a lot of more strategies to locate the shorted secondary diode corresponding to immediately test the diodes, however this method can examine for components shorted even without touching the soldering gun.
This means, if the flyback tester proven eight full bars, then don’t waste your time to test on all of the secondary diodes again. Get one dick smith flyback tester and you could possibly see how worthwhile this meter is in performing variety test for you reminiscent of checking the computer monitor B+ coil, flyback transformer, crt horizontal yoke coil, ballast and lots of more.
510bn Samsung LCD Power Supply Restore Secrets and techniques
The criticism for this Samsung 510BN LCD monitor was no power, after the quilt was opened I found that the facility filter capacitor still hold some cost and the voltage was fairly high. A very good monitor by proper the filter capacitor saved voltage must be discharge in lower than 10 seconds. This means that there was something not proper within the circuit. When you occur to restore the sort of energy drawback, be sure you discharge the filter capacitor first earlier than checking on others components. After the filter capacitor voltage already discharged , I used dick smith flyback tester to measure throughout the primary winding of the swap mode power transformer to see if there are any quick circuit occurred.
The results of the take a look at was the flyback tester LED mild all goes off which means there must be parts shorted either within the major or secondary section, generally the primary winding can go shorted also. A shorted power ic (this monitor is using the 4 pins 5L0365R power ic) within the major 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 full bars, which means that the parts such as power ic (power fet if have), energy transformer major winding and all the secondary diodes aren't shorted. To isolate if the shorts is both within the major or secondary section, you must desolder the power transformer. Examine the first winding of the facility transformer off board first before you take a look at on all of the secondary diodes using analog meter set to instances 10 Okay ohm.
A shorted diode will show two studying registered at the analog meter. On this Samsung 510bn LCD monitor power provide, the triggered of the no energy and filter capacitor take longer time to discharge was resulting from a shorted secondary diode which is from the schottky kind with the half number of SB5H100. Looking the web, I discovered this diode technical datasheet; it is a 100Volt 5A schottky diode. This shorted diode is situated at the 12 volt rail which implies it converts the ac to 12 Volt dc.
After the substitute the LCD monitor work perfectly fine! Whether or not you are troubleshooting the Samsung 510BN Lcd monitor power provide or any kind of change mode energy supply, basically the procedure of testing it's the same. Of course there are a lot of more strategies to locate the shorted secondary diode corresponding to immediately test the diodes, however this method can examine for components shorted even without touching the soldering gun.
This means, if the flyback tester proven eight full bars, then don’t waste your time to test on all of the secondary diodes again. Get one dick smith flyback tester and you could possibly see how worthwhile this meter is in performing variety test for you reminiscent of checking the computer monitor B+ coil, flyback transformer, crt horizontal yoke coil, ballast and lots of more.
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