400 volt capacitor how to know its leckage or damaged

[Guest]

400 volt capacitor how to know its leckage or damaged



one day my own digital satellite reciver not working

itry but not fix

i went to technican and he only change the 400 volt capacitor

my capacitor was like new one


my question is how to know its leckage


i have analog and digital meter

which is best for capacitor

[sparky]

The best way is to use a ESR meter but a standard capacitance meter would work also but not 100%.
A standard analogue or digital meter would give you a rough idea only.
It is the capacitance you are concerned with when testing although the voltage must be fully discharged and a good way to do this would be to use a 1k resistor accross the terminals and then remove the capacitor from the circuit. Switch the meter to ohms range if capacitance option not available and if short circuit you will obtain a low reading but you would normally expect the resistance to continually increase and go over range if a high value and reversing the terminals to start again.
_________________
If in doubt pull the plug out.