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故障现象开机后系统显示“Downloading failed”“Scsicommunication error”梯度显示错误,机器不能扫描。检修(1)关机再重开机,系统显示:“No communi-cation to CCU”观察 CCU 部份,发现 CMU 部分 L163之第三、第四只绿灯不亮。此现象表明 CMU 正负12
Symptom After the system is powered on, “Downloading failed” and “Scsicommunication error” are displayed incorrectly. The machine can not scan. Maintenance (1) Shutdown and then restart the system, the system shows: “No communi-cation to CCU” CCU part and found CMU part L163 third and fourth green light is not bright. This phenomenon shows that CMU plus or minus 12