mac plus power/sweep board

Discussion in 'Apple Collectors' started by max¥¥, Apr 23, 2010.

  1. max¥¥ macrumors 6502a

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    #1
    i have a mac plus with screen problems, as i understand the problem is a cracked solder joint, but i was wondering if the solder joint is on the power/sweep or on the logic board
     
  2. macquariumguy macrumors 6502a

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    #2
    Definitely the power/analog board, but it's likely the problem isn't so simple as that. That board was under-engineered in several ways, I replaced hundreds of them back in the day.
     
  3. MacTech68, May 7, 2010
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68000

    MacTech68

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    #3
    Yup, it sure was, I remember the mud-slinging! :eek:

    But it won't hurt to try running a soldering iron over the LOPT, Yoke connector and Power/sweep to motherboard connector. the last one has a trick where the second last pin on one end is skipped - I saw a few where the last pin (after the skipped one) was missed. ;)
    ________
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  4. max¥¥ thread starter macrumors 6502a

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    #4
    yeah i took it to a tv repair shop and the guy replaced a voltage regulator witch sorted the problem for a month or so, then when it stopped working i assumed it was a cracked solder joint
     
  5. max¥¥ thread starter macrumors 6502a

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    #5
    can i get to the power/sweep board to solder the joints without removing it (i don't like the idea of scraping a screwdriver under the anode cap to discharge it)
     
  6. MacTech68, May 10, 2010
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68000

    MacTech68

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    #6
    Yes, just make sure it's been switched off for 20 minutes and unplugged from the mains. It's not "recommended" but for re-soldering the video connectors, you can get away with it.
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  7. max¥¥ thread starter macrumors 6502a

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    #7

    it's been switched off for a year, so it should be fine, and i shall try soldering it after school:)
     
  8. MacTech68, May 11, 2010
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68000

    MacTech68

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    #8
    I should mention that there is a solder joint you may miss.

    The motherboard/logic board connector has a pin that is skipped just before the last pin on one end. Make sure you don't miss the one after the skipped one. It's the multi-coloured cable, single row, in-line that is soldered horizontally and goes to the motherboard.

    :)
    ________
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  9. max¥¥ thread starter macrumors 6502a

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    #9
    ok i will have to wait till the weekend as i can't find the long screwdriver so i need to get a new one
     

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