From the 1980s to the present, yamaha, a japanese brand, has done its part in the field of auditions. It has not only been a leader in asian musical instruments, audio-visual products, but has now reached out to light industries such as car parts, furniture, etc. And today, the editor comes to you to see how the yamaha sound, when it's used, can be repaired in case of a malfunction。1. Dissembling when volume is adjustedThis is a case of a