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西門子NCU維修故障：
1.西門子840D數(shù)控系統(tǒng)西門子NCU開不了機(jī)，開機(jī)NCU不能啟動(dòng)。
2.西門子840D數(shù)控系統(tǒng)的NCU盒7段數(shù)碼管沒有顯示，屏幕報(bào)警提示NC\PLC未連接，（ncu和PCU都有問題）。
3.送電瞬間所有燈都亮，但是數(shù)碼管無顯示，然后所有燈瞬間變暗，POK燈熄滅，數(shù)碼管不亮
4.NCU板子H1,H2燈全亮的故障
5.840D系統(tǒng)，現(xiàn)報(bào)2120號(hào)警（NCK風(fēng)扇報(bào)警），更換了一塊NCU盒后仍然出現(xiàn)2120報(bào)警--ncu壞了
6.840D系統(tǒng)NCU不能啟動(dòng)。西門子840D/DE數(shù)控伺服系統(tǒng)NCU主板維修型號(hào)：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
-----------------------------
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
-----------------------------
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

數(shù)控控制主板6FC5357-0BB11-0AE0NCU571.2
數(shù)控控制主板6FC5357-0BB11-0AE1NCU571.3
數(shù)控控制主板6FC5357-0BB12-0AE0NCU571.4
數(shù)控控制主板6FC5357-0BB13-0AA0NCU571.3
數(shù)控控制主板6FC5357-0BB13-0AA1NCU571.3
數(shù)控控制主板6FC5357-0BB14-0AA0NCU571.4
數(shù)控控制主板6FC5357-0BB15-0AA0NCU571.5
數(shù)控控制主板6FC5357-0BB21-0AE0NCU572.2
數(shù)控控制主板6FC5357-0BB21-0AE1NCU572.2
數(shù)控控制主板6FC5357-0BB22-0AE0NCU572.3
數(shù)控控制主板6FC5357-0BB23-0AA0NCU572.3
數(shù)控控制主板6FC5357-0BB23-0AA1NCU572.3
數(shù)控控制主板6FC5357-0BB23-0AE0NCU572.4
數(shù)控控制主板6FC5357-0BB24-0AA0NCU572.4
數(shù)控控制主板6FC5357-0BB25-0AA0NCU572.5
數(shù)控控制主板6FC5357-0BB31-0AE0NCU573.2
數(shù)控控制主板6FC5357-0BB33-0AA0NCU573.3
數(shù)控控制主板6FC5357-0BB33-0AA1NCU573.3
數(shù)控控制主板6FC5357-0BB33-0AE0NCU573.2
數(shù)控控制主板6FC5357-0BB33-0AE1NCU573.2
數(shù)控控制主板6FC5357-0BB33-0AE2NCU573.3
數(shù)控控制主板6FC5357-0BB33-0AE3NCU573.3
數(shù)控控制主板6FC5357-0BB34-0AA0NCU573.4
數(shù)控控制主板6FC5357-0BB34-0AE0NCU573.4
數(shù)控控制主板6FC5357-0BB34-0AE1NCU573.4