My Table
Ahhhh, how awful it is! Full of wires, tools and deposits of electronic and chemical waste on my table. I'm trying to repair my broken Edifier speakers 1 month before the exam. After this, I'll concentrate on my study. I can't study with the help of music, so that's why I need to settle it first! I missed the sound of woofer nearly 2 weeks, trying to seek for problems. I guess that either the transformer or the rectifier or the opamp or the amplifiers broken. So, the cheapest way is to change the opamp. After the change, nothing is changed and the speaker is buzzing loudly at low frequency. Hmmm, maybe is the rectifier melted down and can't rectify the AC current. So, I changed the rectifier. Well, nothing changes again! I tested the transformer and the transformer is looking good. So, it must be the amplifier chips! I bravely cut off the power pins of the amplifier. Surprisingly, the rest of the circuit back to work normally. The chip is somehow burnt! Haha, yeah. ...