A luminaire equipped with a fluorescent lamp is a device consisting of several interconnected components. The cause of its inoperability may be a malfunction of any of them. To fix the problem, it is necessary to identify the component of the lamp that has failed.
Instruction manual
1
Before repair, be sure to turn off the lamp. If it was hanging on the ceiling, do not repair it right there - remove the device and put it on the table, and so that it can be checked, connect a regular power cord to the terminal block. Do not touch any component of the device when it is plugged in.
2
With the light off, see if there are capacitors in it. In parallel, each of them must be connected via a resistor. They discharge capacitors shortly after removing the supply voltage. Using a DC voltmeter, make sure that they are all discharged, and only after that start work. If you find that there is no resistor on a particular capacitor, discharge it with a screwdriver with an insulated handle, and then connect a resistor with a resistance of 1 megohm and a power of at least 0.5 W in parallel with it.
3
If the nature of the malfunction is that when the luminaire is turned on, the machine is activated and all the wiring is de-energized, the reason for this is a breakdown of the capacitor that is connected in parallel with the network. Replace it with exactly the same. The capacitance, the operating voltage, and the type must coincide. Just in case, check for breakdown and other capacitors. To test, disconnect one of the conductors from the device, as well as a discharge resistor, then connect an ohmmeter. The arrow should deviate, and then immediately return to its original position. There should not be a leak. After checking, restore all connections.
4
The reason for the lack of inclusion of the lamp may be an open throttle (rare), wear of the starter or the lamp itself. First check the inductor - just ring it with an ohmmeter, without touching the probes, so as not to get a self-induction voltage shock. If there is no break, first replace the starter, and then try to turn on the lamp. Then turn it off and again wait for the discharge of the capacitors (if any).
5
If replacing the starter did not help, remove the lamp and ring both its filaments. Having discovered that one of them has burned out, short-circuit it (in lamps with constant heating from individual windings this cannot be done). If both threads burn out, the lamp must be replaced. It is not allowed to twist two threads at once - the throttle will burn out.
6
There are lamps in which one choke serves two series-connected lamps at once, each of which has a separate starter. Such a device will work only if both lamps and both starters are serviceable.
7
The cause of the blinking of the lamp may be the wear of both itself and the starter. To find out what exactly failed, check the lamp first with a known good lamp, then with a known good starter. After each test run, switch off the device and allow the capacitors to discharge.
8
Replace the electronic converter used in new luminaires instead of the inductor as a whole, and repair the old one to replenish the stock of spare parts that may be required to restore other luminaires. There is no starter in such lighting fixtures. Repair the converter only by qualified personnel.
note
Do not operate while energized. Hand over blown bulbs to special collection points.
