Konka LCD TV LED47IS11PD full screen vertical line maintenance example - appliance repair

Connected to a refurbished machine: A customer came in with a Konka LCD TV model LED47IS11PD, claiming the screen was broken. I asked how he knew it was broken. He said, "The full screen has vertical lines, but it sounds normal." Then he plugged it into the test machine and it didnâ€™t work.

Looking at the picture, the screen looked dark. He wanted to save the screen! The following happened: First, if the repair is good, he offered 700 yuan. But he said, "It's cheaper to give me a cheaper one!" So we decided to disassemble it. Yeah! The screws were loose. This machine had already been taken apart before. He said, "Let other technicians check it out!" They said the screen was broken. Let you see if you can fix it! Okay, let me take a look. I used the multimeter to test the power chip N804, and found that the output pin had no voltage. Then I checked the power inductor and it was so bad that it fell off the board!

Then I told the customer, "Go home, take your money, and catch the plane tomorrow!" After he left, I immediately went to the garbage dump and found the inductor. Once re-soldered, the vertical line disappeared! Who said the screen was broken? I promised to save it!

The final deal was a bottle of R600 (about $80). Here are some more pictures:

Many technicians said, "I didn't see the close-up of N804. The inductor was hidden under the glue!"

This was a real case where the problem wasnâ€™t obvious at first glance. It shows how important it is to dig deeper and not just rely on initial impressions. Sometimes, all it takes is a little patience and attention to detail to find the real issue and save the customer some money. Definitely a lesson learned for everyone involved.

Large Span Cable Tray

Large span cable trays are a type of cable management system used to support and protect electrical cables in industrial and commercial settings. These trays are designed to span long distances without the need for additional support, making them ideal for use in large facilities with expansive cable networks.
The primary function of large span cable trays is to provide a secure and organized pathway for electrical cables. They are typically made from metal or fiberglass and are available in a variety of sizes and configurations to accommodate different cable types and installation requirements.
One of the key advantages of large span cable trays is their ability to support heavy loads over long distances. This is achieved through the use of sturdy construction materials and specialized design features such as reinforced side rails and cross members.
In addition to their load-bearing capabilities, large span cable trays also offer excellent ventilation and heat dissipation properties. This is important for electrical cables, which generate heat during operation and must be kept within a safe temperature range to prevent damage or failure.
Another benefit of large span cable trays is their flexibility and adaptability. They can be easily customized to fit specific installation requirements and can be configured to accommodate changes in cable routing or network expansion.
Large span cable trays are commonly used in a wide range of industrial and commercial applications, including power generation and distribution, oil and gas processing, chemical manufacturing, and transportation infrastructure. They are also used in data centers and other high-tech facilities to support complex networks of electrical and data cables.
Overall, large span cable trays are an essential component of modern electrical infrastructure. Their ability to provide secure and organized cable management over long distances makes them an ideal choice for a wide range of applications, from small-scale installations to large, complex facilities.

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