Common welding methods can be divided into electric soldering iron welding, heating platform welding and reflow soldering, etc.:
A, soldering iron welding is the most common, such as sample preparation, maintenance, because most existing manufacturers in order to save costs, the purchase of soldering iron is mostly unqualified slightly, most of the grounding is poor, there is leakage, the welding process This is equal to the tip of the electric iron in the leakage – the LED is welded – the human body – the earth forms a loop, that is to say tens of times – hundreds of times the voltage of the lamp bead is applied to the track LED lamp bead, instantaneously Burn it out. Note: The situation of connecting the static electricity belt will be more serious, because when the human body is connected to the static electricity belt, the resistance to the ground forming circuit is smaller, and the current passing through the human body to the lamp bead will be larger, which is also said to be electrostatically charged by many people. There are still so many problems with lamp bead damage.
B. The dead lights caused by the heating platform welding, due to the continuous sample of the lamps, most enterprises have become the best production tools in order to meet the needs of small batches and sample sheets. Due to the low cost of equipment, simple structure and operation, etc. However, due to the use environment (such as: the temperature of the fan can not be constant) and the welding operator’s proficiency and welding speed control has become a major problem caused by dead lights, in addition to heating Grounding of equipment on the platform.
C, reflow soldering, generally this kind of welding method is the most reliable production method, suitable for mass production and processing. If it is not operated properly, it will cause more serious dead light consequences, such as unreasonable temperature adjustment and poor machine grounding.
This kind of problem is the most common. Because it does not pay attention to the moisture-proof problem after opening the package, since the sealing material of the lamp bead is mostly made of silica gel material, it has certain water absorption characteristics. After the damp after the lamp bead is attached, the high-temperature welding process The silica gel will expand and contract, and the deformation of the gold wire, chip and bracket will cause the gold wire to shift and break, and the light spot will not be bright. Therefore, it is recommended that the track LED light be stored in a dry and ventilated environment with a storage temperature of -40. °C- +100 °C, relative humidity is below 85%; track LED light is used within 3 months under its original packaging condition to avoid rusting of the bracket; when the track LED light packaging bag is opened, it should be used as soon as possible. The storage temperature is 5 ° C – 30 ° C, and the relative humidity is below 60%.
Do not use unknown chemical liquids to clean the track LED lihgts, as this may damage the surface of the track LED light colloid and even cause colloidal cracks. If necessary, clean it with an alcohol swab in a normal temperature and ventilated environment. The time is best controlled in one minute.
Due to the deformation of some of the lamp panels, the operator will go to the shaping. Because the board is deformed, the above lamp beads are also deformed together at the same time. The gold wire is broken and the lamp is not bright. It is recommended that this type of board be the most It is good to carry out shaping treatment before production. Longer production and assembly and handling may also cause deformation to break the gold wire. There is also the stacking, the production process for the convenience of the hand, the light board is randomly stacked, due to gravity, the lower layer of the lamp bead will be deformed by force, damage the gold line.
Because the power supply design or selection is unreasonable, the power supply exceeds the maximum limit that the track LED light can withstand (super current, instantaneous impact); the heat dissipation structure of the lamp is unreasonable, which will cause dead lights and premature light decay.
The factory’s total ground wire must be checked for goodness.
Static electricity can cause track LED light function failure. It is recommended to prevent ESD from damaging the LED light.
A. The operator must bring an anti-static wrist strap and anti-static gloves when testing and assembling the track LED light.
B. Welding equipment and test equipment, work tables, storage racks, etc. must be well grounded.
C. Use an ion fan to eliminate static electricity generated by the track LED light during storage and assembly due to friction.
D. The box with track LED light is made of anti-static material box, and the packaging bag is made of electrostatic bag.
E. Don’t have a chance to touch the track LED light.
The anomalies that occur with track LED lights damaged by ESD are:
A, reverse leakage, light will cause the brightness to decrease, in severe cases the light does not light.
B. The forward voltage value becomes smaller. The track LED light does not emit light when driven at low current.