How to find out diode is good or bad
Remember what is diode
Remove
the diode from pcb (printed circuited board) than Identify Anode, Cathode
Now
set the multimeter knob to diode test mode.
First Forward
test
Remember -Diode
is allow electric current in only one direction is called forward direction.
multimeter
POSITIVE(+) lead put to anode side than
multemeter
Negative (-) lead put to cathode side
see below the image
Now check
multimeter display show some reading.
A good forward-based diode displays a
voltage drop ranging from 0.5 to 0.8 volts for the most commonly used silicon
diodes. Some germanium diodes have a voltage drop ranging from 0.2 to 0.3 V.
