Common faults and solutions of LED modules

1. Phenomenon: All LEDs flicker.

Problem:

(1) Poor contact.

(2) Some LED switching power supplies have overload protection function. When the LED connected exceeds its power, it will flash to warn.

Solution:

(1) Find the loose part and re-fix or plug it.

(2) Replace the LED switching power supply with a higher power.

2. Phenomenon: LED is dim.

Problem:

(1) LED polarity is reversed.

(2) LED series connection is too long.

(3) The switching power supply and LED voltage labels are inconsistent.

(4) LED light-emitting chip light decay.

Solution:

(1) Ensure that the positive and negative poles are connected correctly.

(2) Reduce the number of LED connections.

(3) Ensure that the switching power supply and LED voltage labels are consistent.

(4) Replace the LED chip or module.

3. Phenomenon: LED lights on some lines are not lit.

Problem:

(1) Is the plug direction correct?

(2) Is the power output wiring correct?

(3) The power cord is plugged in or connected in reverse.

Solution:

(1) Remove and reconnect in the correct direction.

(2) Make sure the red wire is connected to the positive pole and the black wire is connected to the negative pole.

(3) Find out the wires that are partially plugged in reverse and reconnect them.

4. Phenomenon: All LEDs are off.

Problem:

(1) The switching power supply has no voltage output.

(2) Is the output wiring of the switching power supply correct?

(3) The voltage of the LED lamp wiring is wrong.

Solution:

(1) Connect the power supply input terminal for testing.

(2) Is the positive and negative poles of the power supply wiring correct?

(3) Do not use 220V electricity directly to the LED lamp, which will cause the LED to explode. You must use a switching power supply with the same voltage.