Quote:
Originally Posted by Electronic M
If you are testing capacitance, don't bother. If the cap is open that is better. What you want to do do if you are hell bent on checking the paper caps is check the resistance across the cap and make sure it is too high for the meter to measure, and even that is a waste of time for two reasons. 1 some caps won't show leakage at the low 9V a DMM puts out (though that 25 ohms is registering on a meter so you might find it that way). 2 there is no guarantee it is a capacitor (could be almost anything on the B+ line) and it is far simpler (less, possibly MUCH less than half the work of checking all the caps) to start at the rectifier and split the B+circuit into segments by cutting it at nodes then measuring resistance to ground and splitting the lowest resistance section into smaller parts till you find the short.
Can you post a schematic of the power supply in your set?... I can write you a simple procedure to isolate the short if I can see the circuit.
|
I've got a schematic for the power supply circuit, I'll upload it when I get a chance.