机床西门子802D系统报过压/欠压维修-送修当天检测维修，西门子6SN1123启动报607故障维修，西门子驱动器报608故障维修，西门子驱动器报A607故障维修，西门子驱动器报A608故障维修，西门子840D伺服驱动器报警维修，西门子840D伺服驱动器电源6SN1145坏维修，西门子数控系统840D进不了系统死机维修，西门子840D操作面板无显示维修，西门子840D数控开不了机维修，西门子840D伺服控制器6SN1123维修，6SN1118控制卡维修，6FC维修，西门子NCU过热报警维修，上电数码管显示1故障维修。
机床西门子802D系统报过压/欠压维修-送修当天检测维修，西门子840D系统伺服电机维修，编码器维修，刹车维修，上电关不了门维修，跳闸维修，放炮维修，滤波器维修，电源故障维修，黄灯不亮维修，红灯报警维修，CCU维修，主板维修，驱动板维修，控制板维修，功率板维修，操作系统面板维修等。NCU（6FC5357)，CCU(6FC5410)，电源模块(6FC1145)和功率模块(6FC1123及6FC1118），802D，802S/Cbaseline，PCU50及所有系列的OP，西门子数控系统802S，802C，802D，810D/840D各类部件如：驱动电源6SN1145/6SN1146系列，NCU/CCU如:6FC5357/6FC5410系列主板，轴卡6SN1118/6SN1121系列，功率模块6SN1123/6SN1124系列，各类HMI如PCU210/PCU20/PCU50/PCU70，操作控制显示面板6FC5203系6FC5357-0BB11-0AE0NCU571.2数控主板
6SN1123-1AA00-0AA0维修销售 SIMODRIVE 611 1 AXIS 15 A
6SN1123-1AA00-0AA1维修销售SIMODRIVE 611 1 AXIS 15 A
6SN1123-1AA00-0BA0维修销售SIMODRIVE 611 1 AXIS 25 A
6SN1123-1AA00-0BA1维修销售SIMODRIVE 611 1 AXIS 25 A
6SN1123-1AA00-0CA0维修销售SIMODRIVE 611 1 AXIS 50 A
6SN1123-1AA00-0CA1维修销售SIMODRIVE 611 1 AXIS 50 A
6SN1123-1AA00-0DA0维修销售SIMODRIVE 611 1 AXIS 80 A
6SN1123-1AA00-0DA1维修销售SIMODRIVE 611 1 AXIS 80 A
6SN1123-1AA00-0EA0维修销售SIMODRIVE 611 1 AXIS 160 A
6SN1123-1AA00-0EA1维修销售SIMODRIVE 611 1 AXIS 160 A
6SN1123-1AA00-0FA0维修销售SIMODRIVE 611-A/D 1 AXIS 200 A
6SN1123-1AA00-0GA0维修销售SIMODRIVE 611-A/D 1 AXIS 120 A
6SN1123-1AA00-0HA0维修销售SIMODRIVE 611 1 AXIS 8 A
6SN1123-1AA00-0HA1维修销售SIMODRIVE 611 1 AXIS 8 A
6SN1123-1AA00-0JA0维修销售SIMODRIVE 611 1 AXIS 300 A
6SN1123-1AA00-0JA1维修销售SIMODRIVE 611 1 AXIS 300 A
6SN1123-1AA00-0KA0维修销售SIMODRIVE 611 1 AXIS 400 A
6SN1123-1AA00-0KA1维修销售SIMODRIVE 611 1 AXIS 400 A
6SN1123-1AA00-0LA0维修销售SIMODRIVE 611-A/D 1 AXIS 180 A
6SN1123-1AA00-0LA1维修销售SIMODRIVE 611 1 AXIS 180 A
6SN1123-1AA01-0FA0维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA01-0FA1维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA02-0FA0维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AA02-0FA1维修销售SIMODRIVE 611 1 AXIS 200 A
6SN1123-1AB00-0AA0维修销售SIMODRIVE 611 2 AXES 15 A
6SN1123-1AB00-0AA1维修销售SIMODRIVE 611 2 AXES 15 A
6SN1123-1AB00-0BA0维修销售SIMODRIVE 611 2 AXES 25 A
6SN1123-1AB00-0BA1维修销售SIMODRIVE 611 2 AXES 25 A
6SN1123-1AB00-0CA0维修销售SIMODRIVE 611 2 AXES 50 A
6SN1123-1AB00-0CA1维修销售SIMODRIVE 611 2 AXES 50 A
6SN1123-1AB00-0HA0维修销售SIMODRIVE 611 2 AXES 8 A
6SN1123-1AB00-0HA1维修销售SIMODRIVE 611 2 AXES8 A
不导通就难以判断三极管的极性和基极了，把黑表笔接到2脚上看看测量结果会怎黑表笔接1脚的测量结果么变化。如下图，在红表笔接1脚黑表笔接2脚是测量的结果中万用表显示的数值是605，红表笔接3脚黑表笔接二脚测量的结果万用表显示还是1，无穷大。只凭一次测量结果还是没有办法判断，那还得继续往下测量。黑表笔接2脚的测量结果再看看第三次的测量结果，这次测量中黑表笔接的是三极管的3脚，测量3脚的时候万用表的显示数值是617，而测量3脚时显示还是无穷大。