您好：我正在寻求帮助，以查找由日本雅马哈公司于 9 年制造的型号为 A979 的音乐放大器。我在网上只找到了几张电路图，我正在寻找一张完整的图片。此外，https://audiocircuit.dk网站上的维护图纸被标记为“YAMAHA A-9”，但内容实际上与 Pioneer 型号 A-9 有关。感谢您的帮助！
Please post in English. 
Translation:
Hello: I'm looking for help locating a music amplifier model A-9 manufactured by the Japanese company Yamaha in 979. I've only found a few circuit diagrams online, and I'm looking for a complete picture. Also, the maintenance drawings on the https://audiocircuit.dk website are labeled "YAMAHA A-9", but the content actually relates to the Pioneer model A-9. Thanks for your help!
Translation:
Hello: I'm looking for help locating a music amplifier model A-9 manufactured by the Japanese company Yamaha in 979. I've only found a few circuit diagrams online, and I'm looking for a complete picture. Also, the maintenance drawings on the https://audiocircuit.dk website are labeled "YAMAHA A-9", but the content actually relates to the Pioneer model A-9. Thanks for your help!
Hello, I am seeking help to locate a music amplifier model A-9 manufactured by Yamaha Corporation in Japan in 1979. I have only managed to find a few circuit diagrams online, and I am in search of a complete image. In addition, the maintenance drawings labeled as 'YAMAHA A-9' on the website https://audiocircuit.dk actually pertain to the Pioneer model A-9. Thank you for your help!