Seiko S149 Stopwatch/Printer Logo
Posted on Oct 12, 2010
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How to change the internal battery on an s149 stopwatch printer

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  • Posted on Oct 12, 2010
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Go to this link for your instructions. The title page is in Kanji, but the instructions are in english...


http://www.cei-ultrak.com/seiko/s149.pdf

Good luck and don't forget to vote.

  • 1 more comment 
  • djfoster Oct 13, 2010

    Looked at instructions, but couldn't find anything that addresses changing the internal battery that runs the stopwatch-not the AA's that operate the printer. Thanks

  • Mark Speakman
    Mark Speakman Jan 30, 2012

    The stop-watch battery is a CR2032 disc type battery and is located inside the stop watch. You will need to remove four small screws that are visible on the back of the watch, and three more that are under the printer batteries (the four AA battery's under the battery cover).
    Carefully remove the back cover (you will need to have the printer paper cover open). The printer may come lose so be careful it does not frop out. The paper feed button and the slide swtiches on the side may also come lose so be careful not to loose them. The top will not come completely away from the base as it will be attached by electronic tape.
    Simply slide the old battery, and slide a new one it, making sure to keep the polarity correct.
    Carefully reassemble your stopwatch and you're done.

  • Mark Speakman
    Mark Speakman Feb 11, 2018

    You may need to re-set the watch by connecting the "AC" to the "+" with a piece of wire or a paperclip

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  • Posted on Oct 19, 2016
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You say the internal battery is new. Did you replace it yourself? If so, did you reset the device by shorting across the AC and + connections as detailed on the inside of the back cover? If not, I would start there. If you did, I would then suggest taking it back apart and cleaning the contacts of the Start button. Just use some rubbing alcohol and a cotton swab.

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  • Posted on Aug 06, 2015
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Both the internal battery and the 4 alkaline batteries are new. I just can't get the stopwatch to start, the start button doesn't do anything.

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Seiko Stopwatch with printer S149 - came with no manual for setup

Get it here:

http://www.everythingtrackandfield.com/catalog/matriarch/documents/SeikoS149StopwatchPrinter4220.pdf

Rate, please.
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My seiko s149 with built in printer went blank the other day.

The S149 has 2 sets of batteries

1) 4 X AA for the printer
2) a round "button battery inside the unit for the clock.

Open up the unit, you will see that it takes either a 2450 or a 2032 depending on the model.
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