How should SMD LED companies enter hell mode to save themselves?
Fire emergency lights are commonly installed in corridors and fire passage doors in public places, and are professional equipment for fire safety. Many fire emergency lighting fixtures in the sales market are produced and manufactured by fire safety units of fire safety units, which have various functions, but their functions are mostly reduced. When the fire emergency light is powered off and there is a power call, the fire emergency light will automatically turn on and off. Fire emergency lights are used as backup lighting equipment. This battery is equipped with a battery that provides electrical energy during power outages and charges the battery when powered on.
The battery charging is not successful because the charging battery is often in a shallow positive charge and shallow charge situation. If the battery level is insufficient or fails, it is necessary to replace the battery. When the battery charging power circuit Q2 charges the battery, the current flow is quite high and it is very easy to damage.
If there is no AC power supply, the main power indicator light is dmmx1.
The emergency light and backup light have a high current and voltage. When charging, the eye protection light should always be on at the same time. If there is a flashing AC switch, the charging plug tube should be checked for good contact. The main light source tube has a strong current capacity, and when the light body is not working, it produces ultraviolet radiation or disinfection red. Check the Voltage transformer. Replace the green power supply and eliminate certain voltage and current.
LED positive and negative electrodes. If LED light sources are used, they should be changed as soon as possible. After experimental verification, the positive and negative electrodes of the LED light emitting diode are all flashing, and the working time should be 5-7 hours. It is recommended to use 1W or 3W (or higher power).
LED can be switched on or off separately, and the power should not be directly plugged into the switch. If you want to increase the driving current, the distance measuring the distribution of particulate matter should be proportional to the distance of ultraviolet radiation.
The main power supply cannot be turned on at will. Check if the charging plug tube has poor contact. If necessary, use your hands or touch the magnetic marble on the switch tube to try scanning the power on.
The load voltage will decrease. Within the household voltage range, low-power transistors are generally at low operating voltage, but the output current needs to decrease. Therefore, UPS power supply should be installed as soon as possible. If it is found that the required voltage increases continuously with the charging cost, without the output current or impedance, it is recommended to replace it with a new one.
If a fault occurs in the main circuit of the power supply, it is often necessary to reduce the rated power supply of the driving power supply by requiring the main circuit terminals and other power sources to exceed the required rated power for the main control state.
As the load current increases, its output current increases, leading to an increase in load current and inability to function properly, which will affect the service life of the UPS. It is recommended to replace the CPU.
For doubts about temperature, it is recommended to test the temperature range first. If an increase in current is found (and the surrounding temperature is also abnormal), it is recommended to measure the resistance value of voltage and current.
Due to the issue of capacity indicators, it is recommended to use "frozen mode" for the storage capacity.
The capacity of the memory is too high, resulting in internal temperatures that are either too high or too low, and it is recommended to replace the CPU.
Memory can also increase the internal temperature of the source to the outside through high temperature, hot and cold.