Analysis of the reasons why the fluorescent lamp does not light up. What are the common signal devices for fluorescent lamps?
There are many reasons for the failure of the fluorescent lamp at home, which may be due to the lack of a voltage stabilizer and power fluctuations. It may also be caused by the aging of the lamp tube. Let’s analyze it in detail below.
(1) If the lamp life is over. The phenomenon is: one or both ends of the lamp tube is blackened, the blackening range is large, or the surrounding surface of the lamp tube is blackened. The lamp does not emit light when it is turned on, or there is a short-term flash, and it goes out immediately without discharge. The end of the lamp tube emits a deep orange glow without discharge. The reason for this is that the phosphorescent paint around the two electrodes has faded at the same time or at one end after being used for a long time. At this time, the lamp should be replaced with a new one.
(2) The use time of the lamp is not long, far below the rated use time (2500-6000 hours). The reason is that the power supply voltage is not suitable, too many starts caused by switching too many times, or due to poor pin contact. The solution is to find out the data on the ballast? Minimize the number of switches and inspect all contact parts and accessories in detail.
(3) The end of the lamp tube is discolored, and black spots, black rings or brown rings occur in a large area. The reason for this phenomenon is the condensation of mercury in the lamp tube, the mismatch between the ballast and the lamp tube, or the poor quality of the starter. It should also be measured whether the voltage is in compliance and whether the contact parts are in good contact.
(4) The end of the lamp tube only emits dim light but does not light up because the capacitor in the starter is short-circuited, or the contacts are stuck and cannot be separated, or the wiring is wrong. The way to deal with it is: put on a new starter and try it out. If it is a newly installed light, the wiring should be carefully checked.
(5) The fluorescent lamp is difficult to start. The phenomenon is that when the switch is turned on, the flashing time is too long. If this continues, the lamp will be damaged soon. The reason for this failure may be that the fluorescent tube has been used for a long time and its life is about to end. If this is the case with a new lamp, then the quality of the lamp is not high, or the starter is outdated and useless. If the power supply voltage is too low, or the temperature around the lamp is too low, it is difficult to start. During maintenance, if it is a new lamp, it should be installed on another better lamp and tested. If it is still difficult to start, there is a problem with the lamp. If the test proves that it is a good lamp, then the voltage stabilizer should be checked. Starter and ballast, or increase the voltage through the voltage regulator or start the use when the indoor temperature reaches normal temperature.
(6) The luminosity of the fluorescent lamp is reduced by pdqs_3, (that is, the brightness of the lamp is significantly lower than that of the usual lamp. The main reason for this failure is the unsatisfactory use of the lamp, or the external product of the lamp. Too much dust, too low or too high temperature outside the lamp and too low power supply voltage. Except for improper use, other situations can be solved in vain.
(7) Fluorescent lamp ballast Noise, this kind of fault is mainly caused by the unsatisfactory installation, or the vibration of the iron sheet (ie the iron core) inside the ballast, or the mismatch between the lamp and the ballast, the ballast itself is hot, and the ballast has Partial short circuit and other reasons.
The treatment method for this kind of failure is: pad the ballast with a soft rubber pad, so that the sound will be reduced. In addition, check the wiring in detail for errors, and then put the ballast Remove it and apply the rated voltage alone, so that you can determine whether the ballast itself has a problem.
Common signal devices:
Common signal devices In the workshop, one is the signal light of the switchboard, and then there are the signal lights (also called indicator lights) of various machine tools. The signal of the switchboard is mainly used to indicate which way is sending electricity and which way is not. If this kind of signal light has If there is a fault, it will lose its function of indicating.
The fault of the signal device is nothing more than the fault of the circuit block or itself. The signal light does not light up, it may be the fuse of the signal light is blown, or the The main fuse of the signal light is blown. If the signal light of the machine tool is not on, it should be checked from the output of the step-down transformer attached to the machine; .
