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Mark Levinson 432 basket case.

Discussion in 'Solid State' started by Ds2000, Dec 6, 2018 at 11:38 AM.

  1. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    Here it sits in all its basket cased-ness. I’m not opening it until the weekend.
    9783798F-A311-4D0A-BCC3-A0EAC0CE2FAF.jpeg
    I’ll assess it then and straighten up what I can before it goes down to the repairman.
     
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  2. Silentnet

    Silentnet AK Subscriber Subscriber

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    I seriously almost bought this and can't decide if I should hate you or thank you profusely for saving me from myself. Guess that'll become more clear as things progress.
     
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  3. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    It was packed better than most things I’ve received. Impressive!
    The face got its brackets put back into good enough shape, the switch bound wing straightened out and the slide in crimp connection for the power switch fully re-formed. Then the myriad broken aluminum studs from the standoffs were drilled out and tapped to number 8 thread size. Of course something had to go awry, the rapper snapped in the last hole. I tried a few things before I threw in the towel and bought a used Walton 4 flute tap extractor. Minor issue.
    The good is that I’ve straightened the switch issue minus the square four pin plugs on each end which will be replaced. Once the new standoffs and plugs show up, the backside of the faceplate will be complete.
    CDC4B32B-083E-4386-A845-E0EF4D181428.jpeg 6E140934-8545-493F-8226-94E934F9DB0E.jpeg A3C8BF08-410A-45B3-88DA-7085A7CC6ED3.jpeg 57A63A1E-41B3-4143-947C-74B889015621.jpeg A505DAB4-FDB7-44C7-82C5-3C17A0E8B466.jpeg EB4FC4F4-16DE-42F8-B25B-9308659B2528.jpeg 9D92E436-6269-4DBB-A707-00F4D99047AC.jpeg
     
  4. EngineerNate

    EngineerNate AK Subscriber Subscriber

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    Are you going to size up all the fasteners you tapped out or keensert it?
     
  5. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    The 5 I drilled out are now tapped for #8 threads. I’ll be ordering 4-3/8th inch hex standoffs and one at 3/4”. That’ll solve the standoff issue while keeping the sizes the same as the factory. So no keensert, just one size up.
    I took the one transformer out and straightened the mount underneath so now it also sits where it’s supposed to. I think I’ll order a dynamat or similar substitute sheet to re-cut and replace the transformer pads. The original material has compressed and they both seem a little high centered. New padding will solve that completely. I’m going to buy a very long reach philips driver tomorrow to get to some of the buried screws. A few other things shifted and can easily be re-set.
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  6. dbxdx5

    dbxdx5 AK Subscriber Subscriber

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  7. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    Board fix. For some reason, a corner of the laminate was lifting, but not near any traces. So a lil glue and a teeny clamp is the order for the morning.
    578A6B3A-F758-4251-9E4C-F6DD67172EFF.jpeg
     
    Last edited: Dec 8, 2018 at 9:19 AM
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  8. EngineerNate

    EngineerNate AK Subscriber Subscriber

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    This thing is going to turn out to be the deal of the year. This is why I love being able to fix things. Glad it's in good hands. :)
     
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  9. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    The face isn’t as bad as it originally looked after a two part compound. I may file and smooth the dings to look presentable, but keep them as the accident is now part of its timeline.
    5B3B4870-373E-47BF-8CDD-E8B854B5DF23.jpeg
     
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  10. Mark B

    Mark B Yamaha Fan Subscriber

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  11. damacman

    damacman Blown and Injected Subscriber

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    Well done indeed! I’m tuned in.
     

     

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  12. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    Heat sinks and a few other things straightened out.
    5D7BF661-59E3-465F-8342-53B531AE4397.jpeg 8CC22748-1834-4D37-9D6C-9F153BC3625B.jpeg
     
  13. Sound Dragon

    Sound Dragon Yawns and sets his couch on fire! Subscriber

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  14. ryuuoh

    ryuuoh FFXIV Summoner Subscriber

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    That is some seriously big iron, lol.
     
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  15. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    A 20oz glass for size comparison.
    51C7CB0F-7716-47D7-9410-3ACF1D7016A4.jpeg
     
  16. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    Last one before bed.
    7EF5D38D-D498-4C89-BCC2-520E45A7DE8D.jpeg
     
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  17. rottalpha

    rottalpha Yamaholic

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  18. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    A few parts ordered. New standoffs for the faceplate power switch board, the suppression cap located between the transformers (it looks like a little relay and a leg snapped when a transformer moved), a couple new Inrush suppressors as the ones in the amp have leads which look corroded and also seem really weak. Maybe it’s just the crappy pot metal, but they’re cheap and I want them to go, so gone they will be. Also—there’s a 10k 13v cap which I’ll replace with a same brand and rating item. The mains caps look fine, I’ll check with the tech on the usual procedure on this amp for their replacement. When the power board is totally removed, I’ll check all of the solder joints. It’s not a hard one to work on, it’s mostly modular, so stuff is removed in blocks and boards. Smart.
    I’m going to order new rear handles in stainless for a nice contrast appearance.
     

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