Recent content by jh112323

  1. jh112323

    Power supply circuitry not working

    Hi Kris, Apologies for no recent reply, have been busy with studies. You were right! I think the anode pad of adapter socket had fractured somewhere. Anyway I used an arduino breadboard wire (all I had) to bridge from adapter pins to their next pins - and it works! Messy job, I'm new to...
  2. jh112323

    Power supply circuitry not working

    Ah I see, got a bit excited there. Thanks for the info. So perhaps E-F non-continuity is the problem, if it's taken a fall then could there be a hairline crack in that conductor? I could solder a bypass between the two? In terms of testing voltage from D, E shows a potential difference but F...
  3. jh112323

    Power supply circuitry not working

    Thanks for your continued efforts Kris. I (think) have made some progress, and believe the problem is related to the diode. Testing the continuity from the +ve adapter input: E-F and F-G has no continuity. Each step between G-N however is fine. Testing the diode, theres only a voltage drop...
  4. jh112323

    Power supply circuitry not working

    There's continuity at all the points you suggested to measure, A-B, C-D and B-C.
  5. jh112323

    Power supply circuitry not working

    Hi Kris, Thanks for your reply, and sorry for the delay on my part. Busy couple of weeks! I have taken a few more photos, hopefully that show you what you need. The thing behind by finger is indeed the ON/OFF switch. In terms of carrying power to the board, of the 4 wires in that cable, I can...
  6. jh112323

    Power supply circuitry not working

    Hi Kris and shrtrnd, Many thanks for your prompt responses. I understand your point Kris about how the fault likely lies in the adapter if the circuit is shared. What I am confused about is testing the adapter under load. I think I have done this already? Perhaps I'm getting the terminology...
  7. jh112323

    Power supply circuitry not working

    Hi everyone, This is my first problem I've posted, so I'm going to try and follow the suggestions about how to make it comprehensible. I'm pretty much brand new to electronics, so bear with me. The item is a (cheap, Argos) portable DAB radio, that can either use 4x 1.5v AA batteries or a 5VDC...
  8. jh112323

    Hello, Welcome! (Introduce yourself)

    Hi! I'm JH and am a student based in London. I have a keen interest in fixing things (usually bikes), but want to improve my understanding of electronics. Look forward to getting involved, although certainly will be doing more asking than answering! Thanks, JH
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