Display built-in playback function ----- Power Amplifier for Monitor

Display built-in playback function, Power Amplifier for Monitor Keywords: display built-in play function In order to use the child to abandon the idle 35cm color display to watch TV shows, a "excellent picture" UT1488A TV box is configured. Place the TV box in the top of the display, and then watch TV shows, it is indeed a "TV" with a progressive scan, high-definition, no slightness, no slightness, no slightness, no slightness, no slightness No ghost. However, the unfowefacies in the US is the small caliber speaker in the TV box, which is not matched with the excellent picture. In order to make up for its defects, the author used the multimedia speaker to play, the sound quality is much better, and it is basically satisfactory. However, new problems have come out: five major parts such as display, TV box and power machine, remote control, multimedia speakers, in the viewing process, found that multimedia speakers are smaller, may be installed in the monitor, so I want to put it Equipped with the display. Turn your hand open the housing and put the small speaker into the display, with a self-tapping screw of the outer casing. The test machine, the image is good, but the sound is boring, and it can't hear it. The reason is that the transition time is too long. I have to make a good job. Do you do? Try to find a thick 3mm hard PVC board, processed into the shape shown in Figure 1, which is a right angle trapezoid. "Object" is facing up. Down is downward, the head is facing the inside of the display housing backwards. Three small holes are used to torless PVC boards that secure the round horn. The speaker is an elliptical speaker in the long axis of color TV. The speaker hole and the four small screw holes are set according to the size of the speaker. The speaker fixation is: the magnet is facing, the elliptical port is facing outward (the housing surface). The protruding surface is placed at the tail voids at the tail of the color pipe. The magnet shielded portion of the horn is all incorporated with a non-tape to prevent the internal "circuit short circuit" in the display. Figure 2 The circuit is a power amplifier circuit made with TDA2822, and the small printed plate is self-made. The power supply of TDA2822 is replaced by a mobile phone charger. 5.1V / 800MA, small suit, ready-made. The TDA2822 board, the SMPS plates are covered with old cloth (insulated, heat dissipation) hang at the voids of the image tubular tail. The 220V input line of SMPS is taken from the display. Only the TDA2822 audio input shield line is connected from the tail, and the length can be inserted into the television box. Then, a red ribbon is passed from the heat dissipation hole at the top of the display. Used to secure the TV box. Power meter. Everything is willing to pay. Thus, "small TV" is almost integrated in front of the front: only three parts and two plugs.