MTG-1200-1AJF Recent pickup - Bad Solar Battery?
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  1. #1
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    MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    Just picked up a new 'old stock' MTG-1200-1AJF. It's a very nice watch but it doesn't work currently! The seller said it was sitting in a drawer for a few years and was never worn.
    The warranty card says it was purchased in 2015 so i'm guessing the CTL920F Rechargeable battery went bad from sitting.

    Read the 5040JA Manual and found it was on level 3 (Dead) with all hands stopped at 12 o'clock. Let the watch sit in the sun to charge for a few hours but had no luck. Tried every button in the sun as if it were in sleep mode but nothing. Today I gave Casio NJ a call and they want me to send it in for service - It's out of warranty so not sure how much they would charge to repair.

    Has anyone had issues with their MTG-1200-1AJF Not charging or bad solar battery from sitting in darkness for years? I got the watch for $100 after a refund so i believe a repair is worth it since these are $280-$400 right now.
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  2. #2
    Member Slac89's Avatar
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    Leave it in the sun for few days. Couple of hours is not enough.
    Cheers

  3. #3
    G-Shock Mod stockae92's Avatar
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    definitely give it more charging a see. Even if the rechargeable battery is bad, replacing it pretty straight forward and can be DIY.
    Dxnnis likes this.
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  5. #4
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    Thanks! It was out for 5 hours in direct sunlight yesterday - my other solar watch comes on instantly.. Weird.
    I'll leave it out for a week to see if anything happens before swapping the CTL920F Battery.
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  6. #5
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    Quote Originally Posted by Chessnotcheckers View Post
    Thanks! It was out for 5 hours in direct sunlight yesterday - my other solar watch comes on instantly.. Weird.
    I'll leave it out for a week to see if anything happens before swapping the CTL920F Battery.
    I'd also leave it under a really bright light or lamp overnight. It's not near as good as direct sunlight, but 8 hours of indoor light x 7 days is worth at least a little something. Just make sure it isn't a light that will overheat the watch...
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  7. #6
    Member Sir-Guy's Avatar
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    MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    I have a solar Pulsar I wore 20+ years ago. I found it again a few years back, dead in a box in storage. I put it on the windowsill in sunlight and it took somewhere between 5–14 days to come back to life. (I didn’t check after five days until two weeks in, when I saw it was finally running.) I’m not an electronics expert but I figure it had something to do with coming back to life compared to just getting a little charge in.

    So based on a single sample size and anecdotal information, I agree with giving it a lot more sun and patience.

  8. #7
    Member sticky's Avatar
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    The battery is probably kaput but leave it in the sun for a few days - not hours, days - as you never know.
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  9. #8
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    A few days under the sun should work, nice pick!
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  10. #9
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    The watch came to life after sitting out all weekend and today! It's now at level 1 (Full charge) with all functions working.
    Very happy camper. Hopefully the battery holds charge now. It's also very complex to setup but got it done after 20-30 minutes of messing with it.
    Dxnnis, FarmeR57, Bozzy and 2 others like this.

  11. #10
    Member Sir-Guy's Avatar
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    Re: MTG-1200-1AJF Recent pickup - Bad Solar Battery?

    Another success story. Glad to hear it’s running!

    Have any wrist shots to share? It looks like an interesting piece.
    Bozzy and yankeexpress like this.

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