Why are indoor LED lamps not lighting properly?

There are many LED lamps in the home, but with the increasing popularity of energy-saving storms, many families will install LED energy-saving lamps at home, which not only can achieve the effect of lighting, but also save electricity. There is a saying that is full of water will overflow. The moon waxes and wanes. The shortcomings of indoor LED lamps are precisely the need for maintenance. What are the reasons why indoor LED lamps cannot be properly lit?

1, the lights are shining constantly

If the light is constantly shining, it should be black, and you need to check whether D5 or D6 has a virtual solder or open circuit. If D5, D6 soft breakdown or filter capacitor C1 leaks and is bad, it will make the light shine continuously. .

2, CBB capacitor breakdown

It may be that the common resonant capacitor C6 breaks down (short circuit) or the withstand voltage decreases (soft breakdown), first determine the cause, and then replace the high-quality polyester or CBB capacitor of the same capacity with a withstand voltage above 1kV.

3, triode open circuit

If you find that only one transistor is open, but you can't just replace one, you should replace a pair of matching switch with the same voltage above 400V; otherwise, it will cause the light to roll or burn again, so it will always be repaired. 

4, the lamp filament open circuit

When viewing the time, I unexpectedly found that the lamp has no black marks. It can be used in the 0.047 fog/400V polyester capacitor at both ends of the broken wire. It can be used as an emergency only. If it is not in a hurry, it should be repaired.

5, open circuit

If R1, R2 open circuit, or variable value (usually R1 is damaged, it is more likely), you can replace it with 1/4W high-quality resistor with the same resistance value, and then see if the problem is eliminated.