What are the reasons why the light bulb is not so bright What is the reason why the light bulb is no

1. Open circuit problem

For example, if the filament is broken, or the end of the wire is broken, the switch is open, etc., it will cause no current to pass through the appliance, so the lamp cannot shine normally.

2. Short circuit problem

In the socket of the wire, once the neutral wire and the live wire collide, it will cause a short circuit, and once a short circuit occurs, the fuse will soon occur.

Burn off, if it is serious, it will burn the electrical wiring and lead to a disaster.

3. Overload problem

Once the power of the common electrical appliances in the circuit is too large, it will cause the circuit to be unable to bear it, and eventually the fuse will burn out.

4. Circuit connection problems

If the two wires of the socket are on the same wire when we connect, it will cause the bulb to be in series state, and the bulb in series will not light up.

Maintenance of lamps.

When cleaning and maintaining, care should be taken not to change the structure of the lamp, and do not replace the parts of the lamp casually. After the cleaning and maintenance, the lamps should be installed as they are, and the lamps and lanterns should not be omitted or wrongly installed.

Try not to turn the light on and off frequently when using it. At the moment of frequent start-up of the lamp, the current through the filament is greater than the current during normal operation, which makes the temperature of the filament rise sharply and accelerate the sublimation, which will greatly reduce its service life, so it is necessary to minimize the switching of the lamp.

The reason why the bulb does not light up: it may be that the lamp is damaged, the line is faulty, the switch control line has a broken point, and the switch is faulty. Burning out of the filament of the lamp will cause the lamp to not light up.

Solution: 1. First of all, it depends on the incandescent lamp or energy-saving lamp you use at home, if it is an incandescent lamp, it is caused by poor contact, if it is an energy-saving lamp, it may be caused by the unstable voltage in your home, mainly because the voltage is too low, or the contact of the line is poor, if it is not a normal power outage, the cause of the line should be found and dealt with.

2. Disassemble the bulb and eliminate the short-circuit factor; The switch can't really be closed, change it to a new one; The wire inside the plastic is broken, replace the wire.

3. You can swap the unlit lamp with the bright lamp to judge whether the filament is burned out.

4. Replace the bulb.

Summary. The light is not very bright, and it is usually caused by a decrease in voltage or poor contact. Because the bulb is fine.

What is the reason why the light is not too bright, there is no problem with the bulb.

The light is not very bright, and it is usually caused by a decrease in voltage or poor contact. Because the bulb is fine.

We need to prescribe the right medicine and repair according to the reason why the bulb does not light up and some faults. 1. Because there is a problem with the installation line, we need to confirm which section of the line has the problem and then deal with it. If you find it and find that the wire is damaged, you need to replace it with a new one and connect it again.

In addition, it is also necessary to check the joint of the switch to see if there is a wire blocked. 2. If it is a problem with the bulb, first disconnect the power supply, use a screwdriver to remove the lamp holder, and then send the power to detect the neutral line and the live wire. If it is normal, it means that the lampholder is broken, and replacing the lampholder with another one will solve the problem.

3. If it is a problem of voltage, you need to check the power supply voltage and adjust it to a fixed rated value, so that the bulb can be used normally.

I hope it helps, if there are no other questions, can you give a like, thank you very much.

The reasons why small bulbs do not light up are divided into internal and external reasons:

1. External reasons are:

1.Poor switch contact causes the circuit to fail.

2.The power switch is not closed, and the line is not powered.

3.Poor line contact (loose or oxidized wiring of the lamp port).

4.The circuit voltage does not reach the rated operating voltage of the bulb.

Second, the internal reasons are:

1.The filament is disconnected due to excessive vibration.

2.The lamp head lead is soldered.

3.There are impurities in the lamp head or the solder height is not enough, and the shrapnel in the lamp mouth is not in good contact.

Maintenance methods and skills].

1. There is no voltage in the power supply line, on the one hand, check whether the power supply line is out of power, on the other hand, find the cause of the power failure of the system line, and deal with it.

2. Observe that the bulb has broken wire, and replace it with a new bulb; If the filament is not broken, the filament resistance can be determined by measuring the filament resistance with a multimeter, and if the filament resistance value is infinite, the bulb should be replaced in time.

3. Remove the bulb, turn on the lamp head to observe the wiring, if it falls off, it should be reconnected.

4. If the lamp head is hung up, the bulb should be removed, the spring contact should be repaired to make it flexible, or the lamp head should be replaced with a new one; If it is a screw lamphead, after removing the bulb, hook the copper tongue in the middle outward with the tip of an electric pen to make its contact with the bulb more firm.

There are three main reasons why the bulb doesn't light up:1. The bulb does not light up.

There may be problems when installing the wire, which is a common reason. If the bulb connection is loose or the wire is oxidized, it can also cause the circuit to malfunction. 2.

At the switch contacts, poor line contact can also lead to circuit failure and lamp failure. We need to check if there is a problem with this lamp. If the light is not on and the other lights are on, we need to check the lampholder.

3.Voltage FailureIf the voltage is too low, the bulb may not light up at this time. 4.

When the bulb is not lit, the specific solution we need to fix some faults according to the reason why the bulb is not lit. 5.Because there is a problem with the installation line, we need to confirm which section of the line has the problem and then deal with it.

If the wire is found to be damaged, it must be replaced with a new one and reconnected. Also, check that there are no wires connected at the connector of the switch. 6.

If it is a bulb problem, disconnect the power supply first, remove the lamp head with a screwdriver, and then power on to detect the neutral and live wires. If everything is fine, the lampholder is damaged. A new lampholder solves this problem.

7.If it is a voltage problem, you need to check the power supply voltage and adjust it to a fixed rating before the bulb can be used normally.

Circuit problems: The circuit is out of power, such as the wire is burned in the wall, or the wire at the power strip is dropped. Switch Issues:

The switch is loose, and the switch has no force. Lamp problems: common screw lamp holders, the center shrapnel loses its elasticity, and it does not touch the bulb contacts, so there is no power.

Burned-out bulb: Replace the bulb. <

1. Circuit problems: the circuit is out of power, such as the wire is burned in the wall, or the wire at the wiring board falls.

2. Switch problem: the switch is loose and the switch has no strength.

3. Lamp problems: The common screw lamp holder, the center shrapnel loses its elasticity, and it does not touch the contact point of the bulb, so there is no electricity.

4. The bulb burns out: the bulb can be replaced.