There is no power indicator when the machine is turned on, and the display does not light up.
Please check whether the power supply is normal. If it is not normal, please check whether there is 220V and whether it conforms to the normal use range of the hipot tester.
Please check whether the fuse is damaged. If the fuse is damaged, please replace the fuse of the same type.
Please check whether the power transformer has output. If there is no output, please replace the power transformer.
Please check whether the voltage regulator circuit 7812 is damaged. Replace 7812 if damaged.
Start the alarm
Please check whether the sampling resistor on the leakage current switch board is damaged. If damaged, please replace the sampling resistor of the corresponding file.
Please check whether the LM324 is damaged. If it is damaged, please replace the LM324.
There is a voltage indication when the machine is turned on.
Please check whether the thyristor is damaged. If it is damaged, please replace the thyristor with the same specification.
It is in the test state when it is turned on.
Please check whether the NE556 is damaged. If damaged, replace the NE556.
Please check whether the start button is damaged. If damaged, replace the start button.
The instrument starts and the reset fails
Please check whether the NE556 is damaged.
Please check the startup. Whether the reset button is damaged. If it is damaged, please replace the start and reset buttons.
After the start button is pressed, the measurement light is on, but there is no voltage indication
Please check whether the hipot tester equipment is damaged. If damaged, replace the high-voltage transformer.
Please check whether the voltmeter head is damaged. If damaged, replace the voltmeter head.
There is no indication of leakage current
Please check whether the 220Q/5W resistor is damaged. If it is damaged, please replace the 220Q /5W resistor.
Please check whether the LM324 is damaged. If it is damaged, please replace the LM324.