An Interesting Repair Question
Got an interesting question today posted by Dennis:
“What is the best fault finding method to find a short circuit in a electronic circuit?”
And here is my answer to him:
There is no best method but there is a procedure. It depends on type of board and type of short circuit. It require different type of meters to locate the short circuit too but generally using ohm meter could find out the short circuit. It can be shorted cap, transistor, flyback, coils, IC and etc or even shorted between the live/neutral to ground. Shorted components in different section in a circuit board will need different method to test it. For example if there is a short circuit in flyback or yoke coil you need to isolate the problem first by following this link:
Once you have found which section is giving the problem then you can concentrate on checking which shorted components that have pulling down the power supply. If it is a short circuit in power supply side then you may need a light bulb connecting in series along the live line to see if the short circuit still present after replacement of bad parts.
Hope this helps!