How can I test the diode?
The diode is a type of control valve that allows the power flow in only one direction. Generally, this device does not gradually decompose for a certain period of time, but rather it works normally until it stops working together. You can usually test the diode for functionality by performing two simple procedures using a conventional digital or analog multiple meter to test resistance in both devices. Although the testing procedure varies slightly depending on what type of meters you use, the basic steps are the same.
You must be sure of the polarity of the test wires of your particular multimeter before you can exactly test the diode. Using an analog multiple meter in diodes or ohm mode, a normal polarity of red and black test wires often reverses. This perverted polarity must be taken into account when performing the diode test. If you are using a digital multimeter in the diode test mode, the normal polarity of the test wires will not change.
Before you can test the diode, you will also need to correctly determine the location of the anode and cathode terminals. The body of the diode usually has a thin zone around it at one end, indicating the location of the cathode terminal. The anode terminal will be located at the opposite end. In addition, you will need to disconnect one of the diode terminals from the circuit board before performing the actual test procedure. It is also important to note that you must first disconnect all the electricity supplied to the circuit board before you can safely test the diode.
As soon as the necessary products have been made, you will need to connect a positive test line from multiple meters to the diode cathode terminal. You can then connect a negative test test to the anode terminal of the diode. After these connections are created, you should select a diode or OHMS function on a multiple meter and check the resistance. Once this step is completed you will need to reverse the order ofZititive and negative test wires with more meters and re -check the resistance. If reading resistance from the first test is low and the second test reading is high; The diode works properly. If reading resistance from both tests is high, then the diode is not functional and should be replaced.