维修| 日立EUB-5500彩超故障维修

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故障现象

机器无法正常启动，开机后进度条走到1/3处死机，关机后重新启动仍出现相同故障现象。

故障分析

日立EUB-5500正常启动在打开断路器开关并按下开机键后，控制面板背景指示灯亮起，显示器显示读取进度条，在进度条读取过程完成后将显示系统正在启动的信息，然后出现“Now setting system data.Please wait.”的启动画面，随后超声系统启动后进入二维模式的冻结状态。

机器在开机后进度条走到1/3处死机，可推测为机器系统或PC部分出现故障导致死机现象出现。先对机器进行重装系统后测试，启动机器后显示读取进度条仍在1/3处死机，排除机器系统故障可能。日立EUB-5500机器PC部分内主板、MAP板和PB2板出现故障均可能导致机器启动死机，对MAP板和PB2板进行重新拔插后开机测试，仍出现同样死机故障，排除板块接触不良故障可能。

故障排除

逐一更换MAP板、PB2板和主板进行测试，在更换主板后，机器正常启动并进入超声二维工作界面，多次重启机器均正常运行，机器故障排除。

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