Long amount of brand of LED desk lamp capacitor charging Fried v100uf 50
Resistance is replaced This desk lamp should be used on the 24 v power supply
This LED desk lamp, 220 v power supply is to step down by means of capacitance current limiting, once the no-load, after rectification voltage will be increased to 310 v, 220 v x under the square root of 2), seconds kill the capacitance of the withstand voltage 50 v. So, this kind of failure must first check whether the no-load, normally the power circuit of the load is the battery, check the battery cables are broken, the charging current limiting resistor is burned, if these are no problem check current limiting capacitance itself isn't breakdown (usually the breakdown causes 220 v over-current, empty trip meeting).
This kind of LED desk lamp, 220 v power supply is to step down by means of capacitance current limit, once the no-load, after rectification voltage will be increased to 310 v, 220 v x under the square root of 2), seconds kill the capacitance of the withstand voltage 50 v. So this failure, you must first check whether the no-load and load of power supply circuit is normal battery, check the battery cables are broken, the charging current limiting resistor is burned, if these are no problem to check current limiting capacitance itself isn't breakdown (usually the breakdown causes 220 v over-current, empty trip meeting).
