表1 运行情况■VAX-11/780计算机已运行8年,各部分故障率较高。由于发现故障后,抢修及时,保证了在线数据获取和一般科学计算的正常进行,并超额完成了计划开机5000小时的任务。(1)在主机系统中,一次是更换矩阵板,排除了内存故障;另一次是更换M8238 Table 1 Operational Situation ■ The VAX-11/780 computer has been in operation for eight years with a high failure rate in each section. After the fault was found, the repairs were timely and the online data acquisition and general scientific calculations were carried out normally. Over 5000 hours of planned start-up tasks were over done. (1) In the host system, one is to replace the matrix board, ruled out memory failure; the other is to replace the M8238