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自己动手给安卓导航车机磨机

  • 2026-06-12 19:10:52
自己动手给安卓导航车机磨机

自己动手给安卓导航车机磨机

原车使用的碟机导航不能联网,不能导航,感觉音质也不好。刚好同事换新车本田后面又升级车载音响系统,自己也有了更换车机的想法,感觉换了车机,车子开起来应该会更有乐趣。   淘宝买了一个阿尔派的409s  刚开始什么都不改,听一下音质一般般,最主要的是音域不够宽广,音色不够清晰,整体平淡无奇且发闷  拆开看一下配置,音频大电容用的是小厂的2200uf的,所以低音下潜不够  功放芯片用的是小厂TDA7388,三极管功放,解析力不行,声音不够甜美  淘宝下单一块拆机的ST TDA7850  特意确认了功率输出端口,4路输出口内阻均为2.9k左右,标准的mosfet放大器特点  为了证明内阻又买了一个mlt st tda7560,也是mosfet的,只是功率小一点,内阻也正确  这就是TDA7388/7384三极管功放的内阻,120欧姆左右 

-------分页------- 在其他店铺买到了一个假的磨片的 TDA7560,内阻不对,真的应该是2.7k左右  原机自带的TDA7388和TDA7850芯片引脚功能一样,直接等位置对换,旧的2200uf的储能电容换成红宝石4700uf的,功放芯片旁边的耦合电容也换成红宝石47uf的  论坛上有师傅说如果7388芯片输出端口对地如果有退耦电容的话,改7850需要将8个退耦电容拆掉,自己找了一圈,发现这个阿尔派的功放芯片输出端口对地没有退耦电容,刚好省略了一个比较复杂的步骤。   储能电容本来想换成10000uf的,但是线路板那里尺寸不够,放不下,所以又飞线并联了一个红宝石4700uf的,这样储能电容就有9400uf了  这是功放芯片旁边的耦合电容,从贴片电容改为红宝石47uf引脚电容  觉得原机的线路板铜箔不够粗,又在功放输出铜箔上并联上铜导线,这样输出的功率也会加大一点,功放芯片的电源端口也并联上粗铜线,加大电源供给能力  换好的TDA7850  这个芯片21个引脚,普通的电烙铁很难施工,如果有热风枪或者锡炉肯定会更好,旧的功放芯片拆的时候把引脚先全部剪断,然后再一根一根的拆卸芯片引脚。拆卸拆机的TDA7850芯片时用烙铁在拆机线路板上滚锡,然后用镊子慢慢拽芯片就下来了,所以最好买拆好的单独芯片或者买全新的。

然后这个安卓导航电路板应该是4层板,那些功放芯片接地的引脚通孔内的焊锡也很难清理干净。总是有残锡,把电路板焊脚铜箔都烫烂了几个,后来实在是没办法了,先把一根铜线单独焊在线路板引脚焊孔内,然后剪短7850芯片的引脚,采用飞线模式总共飞了4根铜线才将7850芯片更换完毕。更换好的7850芯片打上导热硅脂就可以安装车机了。   在里面的4700储能电容上并联一个0.1uf的高频电容,消除高频杂波  所有零件更换好以后,试听了一下,音质立马不一样了,平淡沉闷的音乐变得高音甜,中心准,低音沉,重点是mosfet推出的声音听起来很暖很柔和,不会生硬。  马上装机试听,音效特别好  整体安装效果,一开始觉得突兀,后来看久了也顺眼了,主要是功能多,音质好,wifi联网听歌特别方便  继续使用原车摄像头,把车机倒车影像参数从AHD改为CSV,也够清晰 

-------分页------- 导航用的原车GPS天线加一个转接头就可以装在这个车机上了,搜星很快  顺便把这个用不到的HDMI接口改造成耳机接口,这样方便连接CD机等音质更好的设备。  目前唯一不太满意的是这个车机的收音机功能效果不好。停车后收音机信 号还好,但是行驶过程中收音机接收不稳定,老是有次次啦啦的杂音。  现在更多的时候是联网听广播了  这是自己比较喜欢的这个车机的音效设置,响度开关基本上不能打开,打开了声音发闷不好听。重低音效果打开,然后低音频  率段往上增加3到5个数值,其他中高音频段不用改,这样低音就很强了。

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  1. CONNECT:[ UseTime:0.000853s ] mysql:host=127.0.0.1;port=3306;dbname=c_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000919s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002644s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000266s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000641s ]
  6. SELECT * FROM `set` [ RunTime:0.000246s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000802s ]
  8. SELECT * FROM `article` WHERE `id` = 489123 LIMIT 1 [ RunTime:0.000517s ]
  9. UPDATE `article` SET `lasttime` = 1784782783 WHERE `id` = 489123 [ RunTime:0.088845s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.005881s ]
  11. SELECT * FROM `article` WHERE `id` < 489123 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000645s ]
  12. SELECT * FROM `article` WHERE `id` > 489123 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.012774s ]
  13. SELECT * FROM `article` WHERE `id` < 489123 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000902s ]
  14. SELECT * FROM `article` WHERE `id` < 489123 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.010556s ]
  15. SELECT * FROM `article` WHERE `id` < 489123 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.072385s ]
0.272832s