(Topic ID: 167309)

LED driver replacment

By pinstyle

7 years ago


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  • 52 posts
  • 12 Pinsiders participating
  • Latest reply 6 years ago by jsrfo
  • Topic is favorited by 1 Pinsider

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    #1 7 years ago

    Has anyone managed to repair one of the LED light boards in a WOZ? I see they use A6281 as a driver but this chip is proving to be very difficult to obtain. I am wondering if anyone knows of a direct replacement for this driver.

    #4 7 years ago

    That might be a better option than what I found. I found a place that will sell me 10 at $2 a piece but they quoted $30 in shipping. Thanks guys.

    3 months later
    #6 7 years ago
    Quoted from agodfrey:

    My question is if it's just one led on smd on the board (in my instance the red doesn't work but green and blue do and there are no other issues) is the driver an issue is there there an smd available that can go in? I know these ws2811 have built in controllers but if it's just the smd that's bad and not the rest of the set up.
    More than anything we'll eventually need to have these be serviceable and I'd love to be on the edge of that so I don't have to pay $70 every time my rainbow letters act up

    My guess is yes, it is the controller that is bad. I have another board starting to go. This would be my fourth in 2.5 years. I like the game but my fear is that I won't be able to keep the game because I can't afford to light it

    That in itself is a hilarious thing to say, something I would never had expected in a pinball machine.

    #13 7 years ago

    My first attempt to pull the bad chip and reset it was a failure. My current plan is to buy the replacement board I need and attempt to repair the bad one again. I used a heat gun but I need something with smaller tip so I am not heating such a large area. I think I might have put down too much solder also before I tried setting the chip. It seems like once you get the hang of it, surface mount might not be all that bad to repair. I need some serious spectacles though, it's tough to see some of these chips. That A6281 has like four pads on each side, 3mm package....yikes..

    #21 7 years ago

    Thank you everyone. That was one of the more informative videos I have watched so far. Hopefully I can get it down someday. I need a respectable rework station and to just start trying and trying. I saved a few boards from stuff at work that has surface mount components to practice on. I wish I knew a couple years ago that I would be attempting to work on surface mount, I bought a nice Hakko soldering iron, I would have bought a combination setup.

    #23 7 years ago

    That is probably a bit more than I need right now. Pretty neat though..

    1 week later
    #29 7 years ago

    Pulling it was a piece of cake, getting back down is another story

    #34 7 years ago

    I had a pretty high confidence level right up to the point where it didn't work
    Joking aside, I think I can probably pull it off but I need the right tools and a bit of practice. After the holidays I am going to try and round up some tools, see if I can pick up these chips and give it another go.

    #36 7 years ago

    i looked at a few less expensive hot air work stations. Are they any good? I know nothing about them. Unfortunately I am not in a position to spend a lot of money on one right now.

    1 week later
    #40 7 years ago

    Thanks for the update, I am glad you were able to fix it.

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