Question about Tanita BC 554 Ironman Innerscan Body Composition Monitor

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Tanita BC554 Service Manual to fix buttons not working

I've got a Tantia BC554 ironman scales and the buttons stopped working a long time ago. It meant I could not even turn it on. Decided rather than throwing it out to try some DIY repair. Opened up the back and quite quickly found that shorting pins 1 and 13 on the ribbon connector turned it on, so put in a simple switch to do that. Scales now weigh perfectly and have for 2 years since the fix. What my issue is, is that I cant change the personal settings to calibrate for my own height etc. I do not know what (if any) pair of connectors control the other buttons. I cant actaully see what ribbon lines go to each button as that is on the front side of the scales and cannot get to that side without likely destroying the scales. So what I am looking for is a schematic / wiring diagram for the scales so can do another DIY button to control the settings. If anyone has a Service Manual for this or even just a wiring digram for the user buttons that is probably all I need. cheers

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  • Tanita Master
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Tanita may be able to supply the information you need.

Posted on Jan 01, 2014

  • Mark McPartland
    Mark McPartland Jan 03, 2014

    Obviously have tried that first, both a long time ago and recently. They can offer to 'repair' my scales if I take them in but thats not what I'm looking for. Just how to DIY project fix



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Posted on Sep 05, 2010

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This is the response from Tanita
Thank you for your e-mail.

It appears that this could be a battery connectivity issue.
When you change the batteries – please insure that you are getting a nice tight fit and that the positive side of the batteries are making contact with the inside wire. Sometimes the batteries can differ in length so you can gently pull on the coil to help make it fit more tightly. Also take a look at the inside contact points to make sure there is no rust. If there is rust – you can clean by using a green kitchen scotch-brite pad & a q-tip dipped in rubbing alcohol.

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