View Single Post
  #129   Report Post  
Posted to uk.d-i-y
The Natural Philosopher[_2_] The Natural Philosopher[_2_] is offline
external usenet poster
 
Posts: 39,563
Default Electronics help

On 04/02/18 16:47, Cursitor Doom wrote:
On Sun, 04 Feb 2018 12:30:44 +0000, ss wrote:

As for the other I may as well get a replacement for the faulty diode
and see what happens, now out of interest more than anything else due to
the other charger now working.


Sorry, not read this from the beginning so don't know which diode you're
referring to. Some diodes you can just replace from whatever you find in
your junk box and they'll work just fine. HOWEVER, if your SMPS runs at
(for example) 20khz (some run much faster) then you will NOT fix it by
replacing the diode with another common-or-garden rectifier device. For
these you need a *fast recovery* diode. The low junction capacitance of a
FRD can make all the difference between it working or not. They're not
expensive, but you're highly unlikely to have one lying around. I'm sure
CPC Farnell have them for peanuts, though - order over internet.



Its the mains input side, dear, running at 50Hz


--
I would rather have questions that cannot be answered...
....than to have answers that cannot be questioned

Richard Feynman