Whats this?

Discussion in 'DIY Discussion' started by Parrot of Doom, Jun 2, 2005.

  1. Parrot of Doom

    Parrot of Doom

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    [​IMG]

    Bridge rectifier?

    Anybody got a compatiable product code I can replace it with?

    Amp is a Naim Nap90, problem is its only supplying 10VDC to the preamp, instead of 24VDC.
     
    Parrot of Doom, Jun 2, 2005
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  2. Parrot of Doom

    hifienthusiast

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    hifienthusiast, Jun 2, 2005
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  3. Parrot of Doom

    Parrot of Doom

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    Replaced it, still have problems although the preamp is getting more power. I think the cap is dry, and perhaps the LM317T as well, so I'll replace them both. Might as well do the beads at the same time :)
     
    Parrot of Doom, Jun 3, 2005
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  4. Parrot of Doom

    Tube_Dude

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    Hi Parrot

    Isnpect the two orange (tantalum ) capacitors...they usually fail short.

    Take them out of the circuit and inspect with a ohmmeter ...

    Regards... :MILD:

    Jorge
     
    Tube_Dude, Jun 5, 2005
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  5. Parrot of Doom

    Parrot of Doom

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    Just ordered a new LM317T and the large capacitor today, so will try that next. I'll have the beads out at the same time, should be easy to get from Maplin.
     
    Parrot of Doom, Jun 6, 2005
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  6. Parrot of Doom

    Parrot of Doom

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    Feck. How odd.

    Power the preamp with the 5-pin from the SNAPS, and its happy. Power it from the 4-pin from the SNAPS, its not happy.

    Both sockets in the preamp share common rails for 24V and earth, but the 5-pin has 2x24V supplies one of which is isolated to a different part of the preamp's circuit board, so I'm now presuming the preamp has a fault which I have to find, seeing as the poweramp is now working perfectly and supplying a full 24V.

    Bugger!
     
    Parrot of Doom, Jun 8, 2005
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  7. Parrot of Doom

    Mr Perceptive

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    Parrot of Doom

    Blindling obvious, but have you inserted the link plug in the pre-amp when powering it through the 4 pin socket?

    The link plug goes in the 5pin socket on the pre-amp and joins the two 24v rails together.

    Mr Perceptive (aka davidy on Pistonheads!)

    PS you will get a lot more Naim assistance in the Pink Fish Media forum, no offence to Zerogainers!
     
    Mr Perceptive, Jun 8, 2005
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  8. Parrot of Doom

    Parrot of Doom

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    [​IMG]

    I knew I kept that link for some reason or other! God I feel thick.

    Oh well, at least the power amp is sorted now :)
     
    Last edited by a moderator: Jun 8, 2005
    Parrot of Doom, Jun 8, 2005
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