三菱 FR-XCB-22K 伺服电机特价
.在线检测
1)直流电阻的检测法
同离线检测.但要注意:
(a)要断开待测电路板上的电源;
(b)万能表内部电压不得大于6V;
(c)测量时,要注意外围的影响.如与IC芯片相连的电位器等.
2)直流工作电压的测量法
测得IC芯片各脚直流电压与正常值相比即可.但也要注意:
(a)万能表要有足够大的内阻,数字表为;
(b)各电位器旋到中间位置;
(c)表笔或探头要采取防滑措施,可用自行车气门芯套在笔头上,
并应长出笔尖约5mm;
(d)当测量值与正常值不相符时,应根据该引脚电压,对IC芯片正
常值有无影响以及其它引脚电压的相应变化进行分析;
(e)IC芯片引脚电压会受外围元器件的影响.当外围有漏电,短路,
开路或变质等;
(f)IC芯片部分引脚异常时,则从偏离大的入手.先查外围元器件,
若无故障,则IC芯片损坏;
(g)对工作时有动态信号的电路板,有无信号IC芯片引脚电压是不
同的.但若变化不正常则IC芯片可能已坏;
(h)对多种工作方式的设备,在不同工作方式时IC脚的电压是不同
的.
三菱 FR-XCB-22K 伺服电机特价
FR-E740-0.75KNC-60
FR-A8NCN
FR-XC-55K
FR-XCL-55K
FR-HEL-H315K
FR-HEL-H355K
FR-XC-H55K
FR-XCL-H55K
FR-A840-00250-2-60AWH
FR-E720-1.5KSC
FR-E720-2.2KSC
FR-HC2-H280K
FR-HCL21-H280K
FR-HCL22-H280K
FR-HCC2-H280K
FR-HCR2-H280K
FR-HCM2-H280K
FR-A846-00052-2-60C2
FR-A846-00250-2-60C2
FR-A8AVP
FR-A8VPB-H
FR-A846-00770-2-60C2
FR-A846-00930-2-60C2
FR-A846-03610-2-60C2
FR-A840-22K-1
FR-A840-55K-1
FR-XC-22K
FR-XCL-22K
FR-XCB-22K
FR-XC-H55K-60PWM
FR-XCB-H55K-60
FR-E720EX-0.1K
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FR-XC-H11K
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FR-A820-00046-2-60AWH
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FR-A820-00105-2-60AWH
FR-A820-00167-2-60AWH
FR-A820-00250-2-60AWH
FR-A820-00340-2-60AWH
FR-A820-00490-2-60AWH
FR-A820-00630-2-60AWH
FR-A820-0.75K-1
FR-A820-2.2K-1
FR-E7DS
FR-A842-315k-1
FR-A820-7.5K-1-60
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FR-E840-0170EPA-60(J)
FR-E840-0016EPB-60(J)
FR-E840-0026EPB-60(J)
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FR-E840-0095EPB-60(J)
FR-E840-0120EPB-60(J)
FR-E840-0170EPB-60(J)
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FR-A8NC E-KIT
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FR-A8AR-60 E-KIT
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FR-A8NC-60 E-KIT
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FR-E820-0015EPB-60
FR-F840-00470-3-N6
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FR-E740-016-NA
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FR-E720EX-0.2K
MM-GKR23
FR-A8AP E-KIT
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FR-E740-120-NA
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FR-CC2-N560K-06P