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Recent content by Alchad

  1. A

    Power supply problem

    Found this on Google - could be the beast? https://datasheets.maximintegrated.com/en/ds/MAX1744-MAX1745.pdf
  2. A

    Power supply problem

    I think it's 1745 EUB Regards
  3. A

    Power supply problem

    any use?
  4. A

    Power supply problem

    Hi, Replacement capacitors have arrived and I've replaced the large one and the medium size one that was looking a bit dodgy on the top. Hasn't made any difference! I've been swapping the good and bad DAC unit around just to confirm the problem:- The good DAC unit allows the motherboard CPU...
  5. A

    Power supply problem

    Update - just couldnt read the numbers on most of the devices. Have ordered some replacement capacitors and when I take off the big one should be able to read them. Will update then. Regards Alan C
  6. A

    Power supply problem

    Can you get the device numbers on ALL the five on the heatsink? Will try tomorrow, Thanks again
  7. A

    Power supply problem

    What about the fact that when trying to power the 21w side of the light it was flashing/blinking - my electrically ignorant thought was that it was struggllng to supply enough current?? I've tried to do a quick check on the 5 devices attached to the heat sink, basically both sies of each...
  8. A

    Power supply problem

    Try connecting a 12V bulb (rated at 12W or 25W - get one from a car! or a 50W bulb - you might have low voltage halogen lighting in the kitchen?) straight across the 12V feed from the DAC board. It 'should' still provide 12V under this level of load - if it won't then you'll have to let us know...
  9. A

    Power supply problem

    Re the capacitors, they are "Xunda" - which googling don't seem to have a good reputation and I've seen on other forums that Cambridge Audio have been accused of using cheap Chinese components. The biggest (brown) capacitor has a 105C rating, the medium size ones including the one with the...
  10. A

    Power supply problem

    Agreed, BUT as already said, with the good DAC supplying this PSU, the motherboard powers up fine, with the faulty DAC supplying this PSU the motherboard does not power up, so this PSU is not relevant to my problem. Just occurred to me - might be one of those " why didn't you say that before"...
  11. A

    Power supply problem

    Yes, capacitor does look slightly dodgy and is marginally more convex than the one on the "good" DAC. Not sure what the connector does, I'd have to check. BUT don't think it's relevant to the problem as th only connectors which have been connected up during my test of both the "good" DAC" and...
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    Power supply problem

    I've posted a photo above
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    Power supply problem

    Thanks for the replies, Duke 37 Very difficult to read the type numbers because they are obscured. Not all identical, at least two are CQ 526 MBR 2045CTG Kelly's eye Sorry, not sure what you mean by 12volt supply to the adapter board. The supply to the DAC board below is 18v AC from the...
  14. A

    Power supply problem

    Hi, the 12 volt supply from the DAC unit feeds another small PSU. It plugs into a connector on the motherboard and provides the 5v supply via the connector. In the photo below, the black/white wires go to the DAC unit and theblack/red/yellow supply the hard drive and cd unit. I'd meant to say...
  15. A

    Power supply problem

    Hi, I know my way around the inside of a computer, but am completely unfamiliar with anything using capacitors and resistors etc so am looking for some advice. By way of explanation before I get to my question, I have an old Cambridge Azur 640H music server - basically a mini PC with...
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