I posted a help request earlier: "Skyworth Color TV 5T361 - Movement Strange Fault Case for Help". Db 15 Connector,Right Angle 15Pin D-Sub Connector,Db Hole Dip Signal Input D-Sub Port,15Pin Signal Input Port Dongguan City Yuanyue Electronics Co.Ltd , https://www.yyeconn.com
The fault occurs as shown in the image. It's a recurring issue, and only one symptom appears at a time. The duration varies from a few seconds to several minutes. Sometimes it can last more than half the screen. When the problem happens, the line pack makes a loud squeak, and the output voltage drops significantly. Regular checks of the line output don't show any obvious issues. The measured line current is close to 500mA. During the fault, the power supply current-limiting resistor gets very hot and even turns red. The air coil and normal pillow correction tests are fine. The power supply works normally, and replacing the board with another picture tube doesn’t change the situation.
After several days of troubleshooting and with the help of some great replies, I finally fixed the TV. Here’s what I found: the line push transistor 2482 was performing poorly, and the 47-ohm resistor in the line section had increased slightly, measuring around 50-60 ohms at times. Replacing these two components resolved the issue completely. I'm still trying to understand why these two parts caused such an unusual fault. Feel free to share your thoughts or experiences if you've seen similar problems. Happy repairing!
Skyworth color TV (5T361 movement) strange fault has finally been repaired - android - Phones Developers
The TV model is Skyworth 5T361, the mainboard is 8829, the power supply uses STR G9656, the field sweep is LA7841, and the audio chip is TA8246.