Just for learning - I've got a DE-5000 meter, and this particular cap are bulged, and looks terrible, so i know it's dead.
I'm just wondering, what to look for, while measuring caps. What frequency do i wanna use? Ie. What is the "golden pointer" on a dead cap?
The cap is a Samxon 1000 uF, 16V, 105C. GK (M) series,
Tests;
1 KHz; D = 0,799, 7,646 uF, Q = 1,251, ESR = 16,62
10 KHz; D = 1,296, 3,416 uF, Q = 0,771, ESR = 6,02
100 KHz; D = 1,780, 872,0 nF, Q= 0,561, ESR = 3,23
This is a SMPS 9V DC powersupply for a creditcard-device, the DUT did not boot up, did not even turn the back-light on. Hooked up the scope to the PSU, and it looks like an EKG-monitor, with ~4V P-P - Will this PSU work again, if i replace the cap?
It did work, when it was stored away - Can other things go wrong in a PSU?