Simple repair of a miniature fluorescent lampDecember 2, 2017
It is convenient to use miniature fluorescent lamps for room lighting.
It happens that they fail, without having fully developed their resource and, if done
simple repair, then the lamp can be restored.
Prices for such lighting devices are still quite tangible, which means that their repair is still relevant.
If a miniature fluorescent lamp with a power of 20WA and a voltage of 220-235V fails after working for about 2500 hours, instead of the 6000 hours promised by the manufacturer, it is likely that it can be returned to service.
Structurally, the lamp consists of - gas-discharge vacuum flasks, cap and electronic control gear located inside the housing.
The conductors connecting the internal contacts of the base with the electronic unit are short, so you should try not to damage them during the repair. For this work, a set of multitull Lizerman tools from x-gear.com.ua/leatherman_tools/ is perfect, where all the most necessary things are gathered together and placed in one hand.
First, using a flat-head screwdriver or knife, you must open the plastic case. Then, with a tester, measure the resistance of the filaments - these are metal leads in the bases of vacuum flasks or the corresponding pins on the printed circuit board of the electronic unit.
If the filament in the cliff, the repair can not continue. If at least one filament “prozhvanivaetsya” and the tester shows its resistance of about 9 ohms, then the lamp can be restored.
To do this, a shunt resistor of the appropriate rating is soldered to the terminals of the blown filament on the start control device board, in this case 10 Ohm, with a minimum power of 1 WA.
Between the resistor and the PCB board, it is recommended to put an insulating gasket so that the resistor leads do not have any unauthorized contact with the board. This repair of the electrical part is completed.
Everything is assembled in the reverse order - the two parts of the body fit into one and, if the body was damaged during disassembly, it must be restored. After such a repair, the start-up of the lamp takes place with some “flashing” from three to five seconds, after which it goes into normal operation.
If the filaments are damaged completely and the electronic control gear is in good condition, then it should not be thrown away. This unit can be used to repair tubular fluorescent lamps.
Vacuum flasks are filled with mercury vapor in any fluorescent lamps, therefore it is not acceptable to dispose of them together with household waste.