When use the power cable there will be circuit failure occurs,cable disconnection is one of the reasons, we needs to find the specific location of the cable disconnection in order to find a way to repair it.
First of all, the first breakpoint of the cable connected to the 220V line of fire, the other end of the vacant. The digital multimeter pulled to AC2V block, red pen to move to somewhere, the display voltage suddenly dropped to 0.0 a few volts, about one-tenth of the original voltage, from the location forward (FireWire access) It is about the breakpoint of the wire (cable).
Start from the line of the wire , with one hand pinching the black pen tip, the other hand the red pen along the wire insulation slowly moving, then the display shows the voltage value of about 0.445 V (DT890D table measured) around.
In the detection of cable disconnection, the universal table plays a very important role, so to ensure that the universal table can be used normally, so as not to affect the detection. After finding the broken line, take timely measures to repair or replace the power cable
