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Informations pour démonter et réparer la liseuse Kobo Libra Colour de Rakuten Kobo, commercialisée en avril 2024. S’identifie au numéro de modèle N428.

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VCOM setup mismatched by KOBO

I saw some posts on forums commenting that some users opened their Kobo and noticed that the VCOM indicated on the board was different from the VCOM configured in the system. My question is whether I should open my Kobo to check if my model also has a mismatched configuration. It seems that several devices are coming with them misconfigured, and here on iFixit, there is the following information: If the VCOM numbers stay mismatched for long periods of time, this may result in permanent damage to the E-ink display.

So, should I open it to check or ignore it, even though there is a possibility that my Kobo is misconfigured? Any suggestions from Kobo or iFixit regarding this?

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V M,

Some users are seeing small mismatches in VCOM values (e.g. -1362 mV in software compared to -1.37 printed on the display cable). The software is displaying a rounded value, and sometimes latching to a predetermined "expected" result. So, even if it looks like they're off by a little, they actually do match—nothing to worry about!

All Kobo displays come pre-calibrated—so, even if it might seem like the software and printed VCOM numbers don't match to the exact digit, it's still working as designed under the hood. Additionally, even if the displays were off by a few mV, that small of a mismatch isn't stark enough to cause display damage.

Hope this helps!

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V M sera éternellement reconnaissant.
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