Hello friends. In this video.I will show you the repair of the karaoke microphone that has failed by giving high voltage. Sales links of materials in the video
in the description section. good watching Defective material. Because the material burned, the fault was easily detected by observing without any measurements. Defective material A1SHB smd code, SI2301DS p-channel mosfet. The task of the material on the circuit, to make the circuit work as a key to press the power button. The material was subjected to excessive current. Check the resistances of the material. I checked with the values written on the resistors. I have not encountered any problematic resistance. Other important materials on the circuit to make fault detection easier in different faults. MIX 2018 4.8W mono audio output IC. Problems with sound output may also be defective LI-ION battery charge controller. Charging related
problems can also be defective. It is the microcontroller IC that performs all operations. It is almost impossible to find this IC in case of malfunction, because it is custom made. It is the microcontroller IC that performs all operations. It is almost impossible to find this IC in case of malfunction, because it is custom made. I use flux to make soldering easier. I’m cleaning the solder residues with the help of Desoldering Braid. A1SHB is equivalent to mosfet and more powerful
I’m using the A7SHB mosfet. Solder and flux residues with the help of alcohol
I’m cleaning … I’m finishing the material exchange process. Thank you for watching my video. See you in new videos. Have a nice day.