A few days ago, a customer sent in a 50-inch "SElKl" model: SE50FY28 LED LCD TV. The issue was that the power-on indicator light was on, but there was no backlight, no image, and no sound. At first, I suspected a fault in the power supply constant current board (integrated constant current). After removing the cover, it turned out that the power supply constant current board wasn't actually faulty. Using a multimeter to check the low-end working voltage when pressing the "Power" button showed normal readings at first. However, the constant current output terminal only showed a slight movement of the meter needle, quickly dropping to around 94V within one second. This indicated that the power supply constant current board had entered a protective state. Based on this, I concluded that the backlight (edge-lit type) LED beads were faulty.
Replacing the LED beads was a very challenging and risky task. It felt like walking on a tightrope—every step required precision and caution. I wanted to share my real-time experience with fellow technicians, including the photos I took during the process.
When disassembling the unit, I found that the screen was glued to the outer plastic frame, as shown in Figure 11. If I tried to separate the screen from the frame, there was a risk of damaging it. On the other hand, if I didn’t separate it, aligning the screen properly during reassembly would be difficult, as I couldn’t visually confirm the alignment during installation. Additionally, improper tightening of the frame screws could potentially crush the screen.
Considering the complexity and risks involved, I carefully planned each step of the operation. I used my practical experience and manual skills to complete the entire process safely. In the end, everything went smoothly, and the big-screen TV was restored to perfect working condition. Here are the images from the repair for reference. Thank you!
[attach]456562[/attach]
[attach]456563[/attach]
[attach]456565[/attach]
[attach]456566[/attach]
[attach]456567[/attach]
[attach]456568[/attach]
[attach]456569[/attach]
[attach]456570[/attach]
[attach]456571[/attach]
[attach]456572[/attach]
[attach]456573[/attach]
[attach]456574[/attach]
[attach]456575[/attach]
[attach]456576[/attach]
[attach]456579[/attach]
Electric pole, also known as a telephone pole or telegraph pole, is a tall structure used to support overhead power lines and other utilities, such as telephone and cable lines. These poles, typically made of wood, metal or concrete, are installed along roadsides, in residential and rural areas to deliver electricity and other services to homes and businesses. The height and design of poles can vary depending on the specific requirements of the utility company and the location of the poles.
Electric Pole,Distribution Steel Pole,Utility Pole,Electricity Pole
JIANGSU HONGGUANG STEEL POLE CO., LTD. , https://www.hgsteelpoles.com