请求大众车机收音如何改制式？
小弟新购了一台墨西哥产的大众车机，但收音是美国制式的。卖家说是可以改为中国制式的，但我不会，在这里请教各位高手了！！<br />图就是下图中上面的那台。<br /><img src="http://www.zmdz.com/bbs/incomefiles/20081/61943729898.JPG" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://www.zmdz.com/bbs/incomefiles/20081/61943729898.JPG');}" onmousewheel="return imgzoom(this);" alt="" />