GW-7900B Time Not Syncing
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  1. #1
    Member Bluejacket's Avatar
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    GW-7900B Time Not Syncing

    I had my GW-7900B in storage and drained the battery. It's been sitting in a south facing window for a week and I am at medium charge. Does the watch need to be at a high charge before it will sync? Any tips on getting it to sync?

    Photo for reference only.


  2. #2
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    Re: GW-7900B Time Not Syncing

    I believe it should sync on medium charge. However, if the battery drained, it will have lost its settings. It will factory reset to look for the atomic signal in Japan. You need to reset to your local atomic clock, or it will fail to sync [unless you are near Japan].
    /Forrest

  3. #3
    Member Bluejacket's Avatar
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    Re: GW-7900B Time Not Syncing

    Quote Originally Posted by frhoads View Post
    I believe it should sync on medium charge. However, if the battery drained, it will have lost its settings. It will factory reset to look for the atomic signal in Japan. You need to reset to your local atomic clock, or it will fail to sync [unless you are near Japan].
    I have it set to my time zone, NYC.

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  5. #4
    Member GaryK30's Avatar
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    Re: GW-7900B Time Not Syncing

    Try pointing the top of the watch through a window toward Colorado, and let it attempt an automatic sync overnight.
    frhoads likes this.

  6. #5
    Member Bluejacket's Avatar
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    Re: GW-7900B Time Not Syncing

    I might have to stick it in the car overnight, I have no west facing windows.

  7. #6
    Member WES51's Avatar
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    Re: GW-7900B Time Not Syncing

    I'm not sure if leaving it in the car is going to work. At least for me when I leave my watches on my desk, (that is full of electronics), they have never synced.

  8. #7
    Member AirWatch's Avatar
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    Re: GW-7900B Time Not Syncing

    : )
    Last edited by AirWatch; March 30th, 2019 at 19:39.

  9. #8
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    Re: GW-7900B Time Not Syncing

    Sometimes, you really do benefit from using a window with a skyview that faces Colorado.

    Some of watches sync in a North facing window because I'm about 500 miles from the equator.
    Sent from my LG-V520 using Tapatalk

  10. #9
    Member Knives and Lint's Avatar
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    Re: GW-7900B Time Not Syncing

    I'm not sure how you feel about doing it, but many members have had good results by wearing the watch to bed at night. Where I live (Seattle and Florida) my atomics sync sporadically at best (more like rarely), even on clear nights in windows facing in the optimal direction. However my son's Rangeman, which he wears almost 24/7 and only takes off for sports syncs pretty reliably on a nightly basis. I guess your body acts as an antenna.

  11. #10
    Member Sir-Guy's Avatar
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    Re: GW-7900B Time Not Syncing

    I’ll second the “wear it to bed” bit. I’ve had good success that way with mine. They usually sync overnight on the windowsill but always do on the wrist.

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