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西门子ncu维修故障：
1.西门子840d数控系统西门子ncu开不了机，开机ncu不能启动。
2.西门子840d数控系统的ncu盒7段数码管没有显示，屏幕报警提示nc\plc未连接，（ncu和pcu都有问题）。
3.送电瞬间所有灯都亮，但是数码管无显示，然后所有灯瞬间变暗，pok灯熄灭，数码管不亮
4.ncu板子h1，h2灯全亮的故障
5.840d系统，现报2120号警（nck风扇报警），更换了一块ncu盒后仍然出现2120报警--ncu坏了
6.840d系统ncu不能启动。西门子840d/de数控伺服系统ncu主板维修型号：ncu573.5/ncu573.4/ncu573.3/ncu573.2/ncu573.5/ncu572.5/ncu572.4/ncu572.3/ncu572.2/ncu571.5/ncu571.4/ncu571.3/ncu571.2
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ncu571.26fc5357-0bb11-0ae0
ncu571.36fc5357-0bb11-0ae1
ncu571.36fc5357-0bb13-0aa0
ncu571.36fc5357-0bb13-0aa1
-----------------------------
ncu571.46fc5357-0bb14-0aa0
ncu571.46fc5357-0bb12-0ae0
ncu571.56fc5357-0bb15-0aa0
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ncu572.26fc5357-0bb21-0ae0
ncu572.26fc5357-0bb21-0ae1
ncu572.26fc5357-0bb52-0ae0
-----------------------------
ncu572.36fc5357-0bb22-0ae0
ncu572.36fc5357-0bb23-0aa0
ncu572.36fc5357-0bb23-0aa1
-----------------------------
ncu572.46fc5357-0bb23-0ae0
ncu572.46fc5357-0bb24-0aa0
ncu572.56fc5357-0bb25-0aa0
------------------------------
ncu573.26fc5357-0bb31-0ae0
ncu573.26fc5357-0bb33-0ae0
ncu573.26fc5357-0bb33-0ae1
ncu573.26fc5357-0bb53-0ae1
------------------------------
ncu573.36fc5357-0bb33-0ae2
ncu573.36fc5357-0bb33-0ae3
ncu573.36fc5357-0bb33-0aa0
ncu573.36fc5357-0bb33-0aa1
------------------------------
ncu573.46fc5357-0bb34-0aa0
ncu573.46fc5357-0bb34-0ae0
ncu573.46fc5357-0bb34-0ae1
------------------------------
ncu573.56fc5357-0bb35-0aa0
ncu573.56fc5357-0bb35-0ae0
ncu561.46fc5356-0bb12-0ae0
ncu573.56fc5357-0bb35-0ae0
ncu573.46fc5357-0bb34-0aa0
ncu573.46fc5357-0bb34-0ae0
ncu573.46fc5357-0bb34-0ae1
------------------------------
ncu573.36fc5357-0bb33-0ae2
ncu573.36fc5357-0bb33-0ae3
ncu573.36fc5357-0bb33-0aa0
ncu573.36fc5357-0bb33-0aa1
数控控制主板6fc5357-0bb11-0ae0ncu571.2
数控控制主板6fc5357-0bb11-0ae1ncu571.3
数控控制主板6fc5357-0bb12-0ae0ncu571.4
数控控制主板6fc5357-0bb13-0aa0ncu571.3
数控控制主板6fc5357-0bb13-0aa1ncu571.3
数控控制主板6fc5357-0bb14-0aa0ncu571.4
数控控制主板6fc5357-0bb15-0aa0ncu571.5
数控控制主板6fc5357-0bb21-0ae0ncu572.2
数控控制主板6fc5357-0bb21-0ae1ncu572.2
数控控制主板6fc5357-0bb22-0ae0ncu572.3
数控控制主板6fc5357-0bb23-0aa0ncu572.3
数控控制主板6fc5357-0bb23-0aa1ncu572.3
数控控制主板6fc5357-0bb23-0ae0ncu572.4
数控控制主板6fc5357-0bb24-0aa0ncu572.4
数控控制主板6fc5357-0bb25-0aa0ncu572.5
数控控制主板6fc5357-0bb31-0ae0ncu573.2
数控控制主板6fc5357-0bb33-0aa0ncu573.3
数控控制主板6fc5357-0bb33-0aa1ncu573.3
数控控制主板6fc5357-0bb33-0ae0ncu573.2
数控控制主板6fc5357-0bb33-0ae1ncu573.2
数控控制主板6fc5357-0bb33-0ae2ncu573.3
数控控制主板6fc5357-0bb33-0ae3ncu573.3
数控控制主板6fc5357-0bb34-0aa0ncu573.4
数控控制主板6fc5357-0bb34-0ae0ncu573.4
数控控制主板6fc5357-0bb34-0ae1ncu573.4