Seiko 7548-7000, can i fix it?
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  1. #1
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    Seiko 7548-7000, can i fix it?

    I got my hands on one of those, it's in reasonably good condition however it doesn't work - I can see visible damage to the coil, so there is a decent chance that's the problem i would think.

    Question is, is a coil like that soldered or could i possibly replace it myself? And can one get a replacement coil at all?

    Would love to get it running, really is just my cup of tea:)

  2. #2
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    Re: Seiko 7548-7000, can i fix it?

    You probably can't replace the coil, I guess you mean the hairspring. You need some fine levers to lift the collet and remove the hairspring and use a stakingset to fit a new one. You probably have more chance buying a donor movement with an ok balance and swap the whole balance complete.

    Grtz Melvin
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  3. #3
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    Re: Seiko 7548-7000, can i fix it?

    I'm not sure what it's called in english then - just to clarify the part that looks broken in my watch looks like this: http://i32.photobucket.com/albums/d4...0/101_2302.jpg I just thought it was called a coil.

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  5. #4
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    Re: Seiko 7548-7000, can i fix it?

    Ow I'm sorry, you could be right. I figured you were talking about a mechanical movement. Wait for someone with some good knowledge of quartz movements ;)

  6. #5
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    Re: Seiko 7548-7000, can i fix it?

    Hi Kasper,

    That is a well known problem on these movements. The coil is close to the battery-clasp and while loosening the screw closest to the coil an easy slip of a screw driver will damage the coil.

    The bad news is that the coil is now worthless. The good news is that you can buy a donor watch that is related to the 7548. You need a (cheap) Seiko 7546 and use its coil, which is exactly the same.

    Good luck, 7548's are great divers!

    Paul
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  7. #6
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    Re: Seiko 7548-7000, can i fix it?

    Cheers Paul, that is good to hear. I will have to keep an eye open for a replacement - it's too nice a watch to throw away.

  8. #7
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    Re: Seiko 7548-7000, can i fix it?

    Love to preserve vintage watches, and other items...
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  9. #8
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    Re: Seiko 7548-7000, can i fix it?

    Quote Originally Posted by eayden View Post
    The coil is close to the battery-clasp and while loosening the screw closest to the coil an easy slip of a screw driver will damage the coil.
    Don't get me started on exposed coils on quartz movements. Vanishingly few don't have them exposed and it makes no good engineering sense why. Other than grime buildup and the quartz oscillator dying, this is about the biggest cause of quartz movements giving up the ghost. I've replaced a few in my time, including recently one in a Seiko as it happens. A friend of mine's ladies watch where it "suddenly died" after the last battery change. She was not a happy camper as it held significant sentimental value as it was a present from her mum. The goon who did the work claimed no part in its demise of course, but even a quick look with the unaided Mark 1 Human Eyeball(™) could see the near perfectly shaped screwdriver mark in the coil. Enter stage left; Me. "Oh you know watches right?" :) Took me a while to track down the right replacement movement funny enough. Should be fairly easy to track down a 7548 movement though. Nice watch Kasper, well worth bringing back to life. :)
    .
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  10. #9
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    Re: Seiko 7548-7000, can i fix it?

    I guess a lot of different movements used the same coil so one can try different movements from the same maker.

  11. #10
    Member Wibbs's Avatar
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    Re: Seiko 7548-7000, can i fix it?

    That's what I though S and I had a few donor Seiko bits and bobs around the place, but in my case anyway, it was quite the specific part. Maybe that was an oddball mind you. I did notice very few showing up in the Bay, as whole watches, never mind movements/spares. With a Yema I have that had a Seiko movement(they ran the brand for a time), a replacement NOS movement came up within a week and I'd find another easily enough today. Hopefully the same can be said for Kasper's watch.

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