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How to repair LED fluorescent lamps?
Repair, fix led fluorescent replacement， led fluorescent， led fluorescent lamp， led lights fluorescent， led compact fluorescent， led fluorescent suppliers
On 1 FT, 2 FT, 3 FT, 4 FT, 5 FT LED fluorescent lamps, If whole LED tube is not working. Almost all the reason is the driver board fault.
On the 8 ft led tube lamp, If there is half of the bulb is not working. The reason is one of driver board fault.
Hereby let you know how to replace the driver board for the led fluorescent tube.
Wires connection of LED Tube
Tools Needed: Screwdrivers, digital multimeter, vise, soldering iron.
Failure 1：One series LED not work
Taking apart the tube by removing PC cover, testing the failed LED with digital multimerer, connecting the positive pole to red pen, and black pen to negative pole ( for negative pole, there is a breach.) If the LED shines, it’s not the problem for this LED, if not shines, then we can judge it’s the problem of this LED, replace this defective LED with good one, and then put PC cover back, and fix it with screws.
(as below photo)
Failure 2: half of the LEDs not work
Taking apart the tube, testing the LEDs with the method mentioned on failure 1 and excluding the possibility of failed LEDs, then check if it is the problem of soldering, like false solder, losing solder, if not, then we can judge the possibility of power supply defect, then change the power supply which connect to the half not working LEDs.
Failure 3: LEDs flashing
Change the power supply
Method for taking apart the tube and replace the power supply (as below photos)
（Photo 1） （photo 2）
Taking apart screws in the two housing of the tube (as photo1)
(Photo 3)
Remove PC cover
(Photo 4) (Photo5)
Taking down the connecting wire on the two end of the tube with soldering iron
(Photo 6) (Photo 7)
Taking out power supply, removing milky insulated sleeve, taking down wires with soldering iron and reconnect the wires to the good power supply, then welding the wire which connect the power supply and PCB, finally assemble the whole tube.