Pioneer Sa-9900 in the worst state i've ever seen an amp

Discussion in 'Pioneer Audio' started by reddish75, May 13, 2017.

  1. reddish75

    reddish75 Active Member

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    177
    Here's the board pretty much finished, I tend to flit between projects so it's taken a while just to get this board finished. I ended up using the heatsinks that been bodged untill I find sutible ones as I needed an anchor point for the t0-126 transistors, it looks a little messy as I've had to point to point most of the traces around the pass transistors but it'll get the job done.

    [​IMG]2018-07-12_12-28-03 by chris reddish, on Flickr
    [​IMG]2018-07-12_12-28-21 by chris reddish, on Flickr
    [​IMG]2018-07-12_12-29-09 by chris reddish, on Flickr
    [​IMG]2018-07-12_12-28-40 by chris reddish, on Flickr
     
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  2. onwardjames

    onwardjames Hoardimus Maximus Subscriber

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    Great work, Reddish! Now put some pants on when you solder, lol!!

    Following with best wishes and great interest.

    @larryderouin - You allowed that Sansui to beat you?? Jeez, cannot imagine that level of damage.
     
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  3. reddish75

    reddish75 Active Member

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    177
    I'm going to tackle the input board next and I'm looking to replace the Phono sockets while it's out, does anyone have a part number for ones that fit?
     
  4. Rsclj

    Rsclj AK Subscriber Subscriber

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    We seem to be running the same project in series...my board was bad...yours is way beyond bad...very nicely done
     
  5. restorer-john

    restorer-john Addicted Member

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    I like your taped precut tinned copper wire lengths for machine insertion. Where did you get them? I've always used reels of tinned copper.
     
  6. reddish75

    reddish75 Active Member

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    Last edited: Jul 17, 2018 at 2:38 PM

     

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  7. reddish75

    reddish75 Active Member

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  8. Rsclj

    Rsclj AK Subscriber Subscriber

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  9. reddish75

    reddish75 Active Member

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    Trying to keep up on the restoration but time isn't my friend at the moment but I have managed to get the second psu board complete the Awr 0770, this one wasn't in terrible condition, just one damaged trace where the 10k pots had been replaced before, the wire wraps, however, are a completely different story.

    First job remove whats left of the wire wraps and label them, remove all components to be replaced then as nearly all the solder joints were dry completely unsolder every joint, clean everything replace components resolder and.......... a pretty damn good looking board again.

    [​IMG]2018-07-22_09-01-21 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-01-41 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-01-03 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-00-48 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-00-34 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-00-09 by chris reddish, on Flickr
    [​IMG]2018-07-22_09-00-20 by chris reddish, on Flickr
     
    QSilver and Rsclj like this.

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