How to repair a fluorescent lamp?

Fault finding procedure

Before finding a fault, check the voltage, it may be missing and there is a reason that the fluorescent lamp does not light up. If the reason is not this, we look for it in this order.

Replace the starter if:

• turned on the light and nothing happens;
• the bulb glows only around the edges;
• the lamp is blinking with a strobe;The
• starter lights up and the lamp does not start.

We draw your attention to the fact that manufacturers recommend replacing fluorescent lamps and starters at the same time.

Replace the bulb if:

• it blinks with a stroboscope;
• edges of the bulb are black;
• it glows, but the brightness is not enough( weakly shines);
• does not work lamp.

Typical failure of budget lamps - destruction of lamp holders and loss of contact. High temperature of the closed luminaire, the cause of destruction of plastic fastening elements and connectors. If possible replace them, bend the contacts in case of a satisfactory condition.

A possible malfunction is the throttling of the throttle, often this breakdown is visible visually, the color changed, the molten terminal.

If you really find a malfunction, you'll have to replace the choke with a working lamp to repair the luminaire. To check up working capacity it is possible by the multimeter, resistance serviceable, an order of 30-40 Ohm. Before putting the lamp in a non-working lamp, make sure that the throttle is not closed. Otherwise, you will lose the worker too.

If you have a luminaire with an electronic ballast made in china and the replacement of the bulb the problem of operation has not been solved, most likely the problem is in the electronic unit. In most cases it can be repaired by owning a soldering iron and a multimeter at its disposal. Below we will dwell in detail on how to repair the electronic ballast of a fluorescent lamp with your own hands.

Repair Instructions for

Now we will look at the main malfunctions that can be fixed without special attachments. Let's start with electronic ballast, because in his scheme there are a lot of elements that can break down and besides tubular fluorescent lamps with electronic ballasts are more often met today.

Ballast

The most common fault is the breakdown of transistors. Determine this breakdown can only be, dropping out of the circuit transistors and checking them with a tester. In general, the transistor resistance of the transition is ~ 400-700 Ohm. Burning, the transistor pulls a resistor in the base circuit with a rating of 30 Ohms.

Also on the board there is a fuse or a low-resistance resistor of 2-5 Ohm, most likely it will have to be replaced, on which the repair will end. It is possible to additionally have to change the diode bridge or its elements.

A breakdown of film capacitors 47n( microfarad floor) or a resonance capacitor in the heating circuit is rare. There have been cases when all of the above listed integer and correct, and the lamp does not work, the reason lies in the DBist dinistor. If you have checked all the circuit elements, try replacing the transistor.

Probably decide that it will be cheaper to purchase a new electronic ballast than to repair a broken one. Replacement of starting equipment should not cause complications, because the connection scheme is applied to the device itself. At close examination it is simple for understanding, L and N are terminals for connection to a network 220В.

We also recommend viewing a video that clearly shows how to repair the electronic ballast of a fluorescent lamp:

We would like to draw your attention to the fact that this technology can also repair an energy-saving light bulb for CFL.For example, if one glow burns out, the repair is the following procedure:

Starter + choke

If you do not have an old lamp and you are sure that the reason lies in it, first of all we recommend checking the starter. The easiest way to perform a test is by having a working starter with the same characteristics at hand. However, if there is no suitable device for replacement, then a performance test can be carried out using an incandescent bulb with a cartridge. All is simple enough - we connect one wire from the cartridge directly to the socket, and the other through the starter, as shown in the photo below:

If the light does not shine, then the reason is in it. The instruction on replacement of a starter of a fluorescent lamp is visually presented on video:

The throttle can be checked with a multimeter by ringing its winding. If the throttle actually fails, then the repair of the fluorescent lamp reduces to the fact that you just need to change the throttle to the whole.

Here are the main faults that were personally encountered and successfully eliminated. Following our algorithm, troubleshooting will take a little time and return the lamp to the work itself will be a couple of trifles. We hope that our instructions on repairing the fluorescent lamp with your own hands were clear and useful for you! Be sure to watch the video lessons, tk.in them all stages are considered in detail, allowing to repair a non-working light bulb.

It will be interesting to read:

• How to use multimeter
• LED lamp repair by own hands
• What is the choke