22 Sep
2014
22 Sep
'14
3:35 p.m.
On 22 September 2014 21:43, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
I think I have been convinced it is ceramic. I was fooled by the packaging,
which looks a bit like what I think tantalum capacitors look like. One day
I will learn to tell the difference more easily.
Annoyingly, after desoldering three capacitors, and breaking the one
mentioned above, I still see an apparent short across the outputs of the
PSU.
Thanks
Rob
In investigating the fault on my H7874 PSU I desoldered a tantalum
capacitor
which I have broken in the desoldering process. I
can't tell its value,
the
markings are 224 E5Z on one side and 038 ASF on
the other side.
The value is given by '224' You read that like the resisotr code, that is
22*10^4, or 2200000. The 'base unit' for cpaacitors is the picofarad
(pF), so that's 220000 pF = 220 nF = 0.22 uF.
That sounds low for a tantalum capacitor. I'#ve actually seen tantalum
capacitors down to 0.1uF, but most are >1uF Are you sure it's tantalum?