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Seiko 0614 5000 Low Contrast Fix

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coconutman351

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Seiko 0614 5000 Low Contrast Fix

Post14 Nov 2020, 18:42

Is anyone aware of resolving a low contrast Seiko 0614 5000 display by doubling the voltage by adding two battery cells (I believe two 381 cells) in series. I have heard that it resolved the low contrast issues however I'm not sure if the logic circuits is robust enough to handle twice the standard voltage.
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DarkWispa

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Re: Seiko 0614 5000 Low Contrast Fix

Post14 Nov 2020, 21:18

Hi with most LCD watches over time the up converter capacitors may need replacing but before you down that route I test the lcd contrast with some polarising film as they can need replacing too hope that helps
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coconutman351

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Re: Seiko 0614 5000 Low Contrast Fix

Post15 Nov 2020, 01:54

Thanks for the suggestion. I may try testing out a new polarizing filter.
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coconutman351

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Re: Seiko 0614 5000 Low Contrast Fix

Post13 Jan 2021, 08:40

DarkWispa you were spot on on the up converter capacitor. What made it difficult was not having any technical manual to indicate the proper capacitance value. I changed out the capacitor just above what appears to be a transistor with that distinct red marker.
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DarkWispa

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Re: Seiko 0614 5000 Low Contrast Fix

Post16 Feb 2021, 18:04

Nice one glad to help 100nF is usually the up convertor valve to use in most LCD boost circuits ;-)

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