Disassembly report: 42p3f built in power supply of Changhong 42 inch intelligent network TV

2021-06-15

Changhong Changhong is a famous brand of household appliances in China. All kinds of large and small household appliances are produced and sold. Recently, the charging head network purchased a 42 inch intelligent network TV 42p3f from Changhong, with built-in special chip for 4K TV and stereo speaker. It will have a good visual and auditory experience. In addition, it also supports mobile games, movies and wireless projection to further enhance the entertainment experience.

Of course, this time it's about dismantling the built-in power supply of this TV. As a smart TV, you must be very curious about the internal design of this kind of TV. Let's take a look at how the built-in power supply of the TV is designed.

The circuit board of this Changhong TV is relatively simple to remove, and the connecting wires are of plug-in design, which is very convenient for assembly and later maintenance. Of course, this dismantling is just to share with you the basic internal design of today's smart TV. Please don't disassemble it privately, so as not to cause unnecessary losses due to the failure of your TV.

Through the disassembly of the charging head network, it is learned that the power supply of Changhong TV adopts four chip Y capacitors of Terex. Based on the single flyback architecture, the output is used for backlight power supply and digital chip power supply, and the output of switching power supply is rectified by Schottky diode. The backlight power supply is controlled by Ambro ob3350cp, and the digital processor power supply is supplied by multiple Ti tps562201 and one tps563201 synchronous buck converter.

WiFi module and wired network interface are integrated on the TV motherboard to facilitate network connection. Digital signal processing and switching power supply in a circuit board, reduce production costs.