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1060 - Purchased, now restoration

Discussion in 'Marantz Audio' started by paultlaw, Jan 9, 2018.

  1. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    410
    Location:
    Orange CA
    Personally speaking, I'd be tempted to redo the wiring the correct way with the solid core and at least wrapped around the posts. You cannot wirewrap once solder has been on the posts and have it work well. Give how screwed up these are, it does give you the chance to use modern wirewrap pins and tools :) If you want to solder, then just get some standoff pins and do a few loops and call it done. Here is a fun article on the fine art of wirewrap - http://www.nutsvolts.com/magazine/article/wire_wrap_is_alive_and_well
     

     

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  2. paultlaw

    paultlaw Active Member

    Messages:
    316
    I am tempted to do just that. What gauge wiring should do? Where can i buy the standoff pins? Quick look on ebay and farnell have not yielded much, is there an official title for the standoffs?
     
  3. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    410
    Location:
    Orange CA
  4. paultlaw

    paultlaw Active Member

    Messages:
    316
  5. paultlaw

    paultlaw Active Member

    Messages:
    316
    Amp board completed, I put heat sink grease on 2 of the heatsink, I'm assuming no need for that as the heatsink might slip off? Probably the reason they were glued originally.

    All transistors replaced, capacitors and one resistor.
     
  6. paultlaw

    paultlaw Active Member

    Messages:
    316
    I am kind of floundering to get this one finished, my time to get this over the line is very limited.
    Whoever messed with the unit before me, left an awful mess on the circuit boards for me to fix, lots of burnt traces etc.
    I bough some wire to connect the output transistors to the power amp board, far too stiff in my opinion i need something more flexible.
    I foolishly also forgot to adequate detail that i would need a signal generator and oscilloscope to set everything up properly and finish commissioning!
    Its a shame to have all the parts and then realise you blew your audio budget on a Onkyo A7090 with one dodgy channel!
     

     

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  7. Strgazr1967

    Strgazr1967 AK Subscriber Subscriber

    Messages:
    74
    I’m currently starting restoration on 2 1060’s. Lol yes I LOVE these amps. Although a scope is nice you can get away with setting the bias to 1/2 the Ps output. Usually 35v or so but I’ve seen some as low as 31v. It’s not exact but unless you have the volume level cranked to the max clipping shouldn’t be an issue. There are other threads that discuss setting it this way.
     
  8. RumpyLover

    RumpyLover AK Subscriber Subscriber

    Messages:
    79
    Location:
    Ohio
    What is the significance of the “(e)” after the model number on your serial number board? My 1060 has this also but I don’t see it on all of them.
     
  9. Strgazr1967

    Strgazr1967 AK Subscriber Subscriber

    Messages:
    74
  10. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    410
    Location:
    Orange CA
    I would recommend you rebuild the power switch or at least take a look at it. I've got pics in a couple of threads here on how I've done it. Steady hands, a very slim flat bladed screw driver and a relay burnishing tool are all thats needed. I clean with DeOxit and then use their non-conductive grease that has DeOxit in it to lube the contacts.

    Most time you can save the switch. Most.. sometimes it's cooked but you don't know till you take it apart.

    Here are two sample pics from a 2226B power switch. It's been pretty much the same for the 2285B, 2226B, 1030 and the 2230. Your milage may vary :)
     

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    paultlaw likes this.
  11. paultlaw

    paultlaw Active Member

    Messages:
    316
    I am still no further along with this project i am ashamed to say.
    Just really need to get this up and running - hardest part is almost done with the power amp board, just need to solder a few bits up and then test.
     

     

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  12. jwjarch

    jwjarch New Member

    Messages:
    26
    No need to be ashamed. I'm finally back to work on my 1060 after more than a few months. I had a few other DIY builds, preamp, Class A amps, speakers, and a Sansui AU-717 rebuild, get in the way. ;) Good luck on getting your 1060 up and running!
     
    Mike Sweeney likes this.
  13. paultlaw

    paultlaw Active Member

    Messages:
    316
    Really not happy with some of my soldering on this, specifically connecting wires to the boards, from outputs to board and then on the big caps. Its like I need three hands. All solder joints are mechanically fixed well etc, I use flux and good quality solder and decent heat. They end up not looking shiny. Doing caps and smaller transistors on boards seems so easy. Anyone have this issue? If so how does one overcome this?
     
  14. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    410
    Location:
    Orange CA
    What I do is using stainless tweezers, I remove the wires by lifting straight up after heating the joint. I then straighten out the joint using heat and needle nose if needed. I then use heat shrink to "sleeve" the end of the wire about 2 inches back in the color of the OEM wire or I use clear. The heat shrink takes the abuse of the re-soldering whereas the OEM vinyl wire goes to shit when you heat it. This lets me put a nice wrap and decent heat to get a clean joint. On the caps, I use eye rings that I have crimped and soldered into place before attaching the wires back to the caps. Here is a shot of the cap with the eye ring before I finish attaching wires
    IMG_4258.jpg
     
    paultlaw likes this.
  15. paultlaw

    paultlaw Active Member

    Messages:
    316
    First magic smoke - Dimbulb tester bulb - check before you test.
    F*** My Life. R746 R726 R735 up in smoke, who knows what other harm i have done
     
  16. paultlaw

    paultlaw Active Member

    Messages:
    316

     

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  17. paultlaw

    paultlaw Active Member

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    316
  18. paultlaw

    paultlaw Active Member

    Messages:
    316
    Where do i go from here?
    I have no idea where to start -
    Do i pull the outputs and test?
    Check orientation of the transistors is correct?
    I am pretty much assuming i messed up one side of this board completely?

    Calling any and all help, thanks in advance
     
  19. paultlaw

    paultlaw Active Member

    Messages:
    316
  20. stoN_Cold

    stoN_Cold Super Member

    Messages:
    3,281
    Location:
    Belgrade, Serbia
    Get it, we'll fix it.
     

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