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Thread: Seiko SK371 BFK Capacitor Replacement

  1. #1
    Craftsman jamesianbriggs's Avatar
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    Dec 2016
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    Seiko SK371 BFK Capacitor Replacement

    Someone posted about getting this done professionally but, as I had the parts waiting, I thought I'd do a DIY step-by-step.

    A few general thoughts:

    -It's straightforward but fiddly. Probably not the first thing you want to try.
    -As noted elsewhere, the slots on the screws are very, very narrow so if you don't have the tools you won't get far.

    So...



    All ready - part was about a tenner on eBay.



    Back off.



    Rotor removed.



    Retainer removed to reveal plastic insulator.



    Insulator off.



    Capacitor out.

    You then, obviously, put the new capacitor in and reverse the process. This is, obviously, MUCH harder. The screws are tiny, the insulator bit has a life of its own and the retainer has a slightly sprung 'leg' that requires a third hand or a lot of patience.

    Anyway, it worked and it's all back together and showing a full charge.

    Phew.


    Sent from my iPhone using Tapatalk

  2. #2
    Craftsman
    Join Date
    Apr 2015
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    leics uk
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    654
    Nice one.

    Dave

  3. #3
    Journeyman
    Join Date
    Feb 2017
    Location
    Essex UK
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    137
    Nice work! Always a worry that it will work afterwards.... big savings over a jewellers

    Sent from my HTC One_M8 using TZ-UK mobile app

  4. #4
    Craftsman jamesianbriggs's Avatar
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    Quote Originally Posted by stiver3 View Post
    Nice work! Always a worry that it will work afterwards.... big savings over a jewellers

    Sent from my HTC One_M8 using TZ-UK mobile app
    Thanks. It worked out fine although it wasn't as easy as I thought it would be.

    Having said that, and touch wood, of the five watches I've had apart to regulate/repair, four are still running strong.

    Sod's law dictated that it was my mother in law's (tiny) movement replacement project that failed after hours of agony.


    Sent from my iPhone using Tapatalk

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