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  1. bushtech

    CTEK MXS 3.8 repair

    Me and my soldering iron have walked a long road since then. How about the AM radio?
  2. bushtech

    CTEK MXS 3.8 repair

    St Edd, I am quite happy soldering smd components on. Is there a specific reason for going with leaded components? If something like higher reliability, etc then I will go with leaded components but if not I would prefer to go with smd components
  3. bushtech

    CTEK MXS 3.8 repair

    Thanks a mill St Edd Pocket sized? No, not for many years;) But I have this: Hope this can work.
  4. bushtech

    New components tests, vs Old components tests

    From your tester's sales blurb: 1.28 Thyristors and Triacs can only be detected, if the test current is above the holding current. Some Thyristors and Tnacs need as higher gate trigger current, than this Tester can deliver The available testing current is only about 6mA.
  5. bushtech

    CTEK MXS 3.8 repair

    I want to replace the two tandem transistors marked 2FE and A6W. On closer inspection of my photo in post #44 the 2FE could actually be a 2F. Searching for this transistor brought up this...
  6. bushtech

    what is the different between speaker wire and power wire

    Hooboy! We're venturing into snake oil territory:D
  7. bushtech

    CTEK MXS 3.8 repair

    Sorted this particular problem. 3 of the 4 rectifier diodes blown.
  8. bushtech

    Short circuit during battery installation on iPhone 6s

    This should give you a fair idea of what could be involved with fixing the phone. Ignore the first bit where he tries out a tester
  9. bushtech

    CTEK MXS 3.8 repair

    Bit of an oddball question: I pulled the 04N60C3 mosfet and then powered up to check some voltages. Instantly blew fuse on power up. On checking I notice a dead short between the drain and source holes on pcb. Is this how it's meant to be or have I got a short somewhere else?
  10. bushtech

    CTEK MXS 3.8 repair

    @73's de Edd St. Edd, hopefully this helps. Attached is a LTSpice file showing the circuit from power in through rectifiers and mosfet and to the 2 tandem transistors and their connection to NCP1271. Please excuse any errors as I battle with LTSpice and it's tricky plotting an unnumbered...
  11. bushtech

    CTEK MXS 3.8 repair

    When I search for that A6W transistor I get to a MMBTA05 Gen Purpose NPN transistor. Is this it?
  12. bushtech

    CTEK MXS 3.8 repair

    Here's a photo of that area:
  13. bushtech

    CTEK MXS 3.8 repair

    Wowee! St Edd. Right on the money as always. Pin 7 of the NCP1271 is indeed missing. There is a complimentary set of transistors, 2fe and a6w. Pin 5 is connected to the connected bases of these two. The gate of the mosfet is connected to the emitter of the 2FE. From emitter of the 2FE the...
  14. bushtech

    CTEK MXS 3.8 repair

    I also spoke to Mantech about the 04N60C3 and was given two alternatives: http://www.mantech.co.za/Stock.aspx?Query=15m6130and http://www.mantech.co.za/Stock.aspx?Query=35M5114and The 04N60C3 is 4.5A/650V The 15m6130 code above is 4.5A/600V The 35M5114 code above is 11A/650V Do I need to be...
  15. bushtech

    CTEK MXS 3.8 repair

    @73's de Edd : Just to the 10 o'clock position of your complementary pair of driver transistors for your POWER FET, should be the 8 pin integrated circuit, minus its one pin pulled for board gap HV isolation . It is being the brains of the control unit for the HOT chassis side . Can I get its...
  16. bushtech

    CTEK MXS 3.8 repair

    Don't know what's happened to whonoes (last seen 11 Oct) so I went ahead and replaced all 3 caps on the hot side including the 2 73's de Edd referred to. I also replaced the 2f (2907) transistor. Then went ahead and pulled the 04N60C3 big heatsinked mosfet. I get a dead short between drain and...
  17. bushtech

    "soldering iron" like instrument generating only low heat.

    Fortunately this particular wheel has been invented: https://www.amazon.co.uk/Zap-Mosquito-Insect-Relief-Device/dp/B000KU74K4 Unless you want to roll your own
  18. bushtech

    Subaru Forester remote

    Thanks Bluejets, will do bit of fiddling on the TV:). Got an Uno here so will do a bit of googling
  19. bushtech

    Help with power supply for jukebox

    Get those voltages 73's de Edd asked for and publish them here. Then compare those voltages with the voltages you get on the working board.
  20. bushtech

    Subaru Forester remote

    Thanks for all the info Bluejets. Spent some time looking at purchasing a key but they all looked pretty dodgy with success looking marginal. Before I go down this rabbit hole I will wait wait until I get to Johannesburg again and visit a scrap yard that specialises in Subaru's and try and get...
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