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Amazon EK3211 Kitchen Scale

An unfortunate incident put enough water inside our kitchen scale to, ummm, render it inoperative. After a day of drying proved unavailing, I had nothing to lose by disassembling it.

The central label on the back conceals two screws holding the platform to the aluminum beam:

Amazon EK3211 Scale - platform underside

Amazon EK3211 Scale – platform underside

The metal plate twist-locks into the plastic platform. The hot-melt glue holding it in position suggests my construction techniques aren’t all that far off the mark.

The beam cantilevers from a metal structure spreading the load across the plastic base:

Amazon EK3211 Scale - interior overview

Amazon EK3211 Scale – interior overview

These are “after” pictures. Suffice it to say the interior was wet, including water droplets between the LCD panel and its plastic cover. Everything came apart easily, including the LCD with its attached zebra connector, and dried out thoroughly over the next day; I parked the panel atop my monitor for some gentle heating.

After reassembly, it still didn’t work, which turned out to be due to both wires from the battery snapping off at their PCB solder joints. I didn’t think I’d handled it that roughly, but ya never know.

With the wires soldered in place, the scale lit right up again:

Amazon EK3211 Scale - display PCB switches

Amazon EK3211 Scale – display PCB switches

The display flashed CAL at one point during the proceedings, although the rather thin manual had nothing to say about recalibration and the PCB didn’t have any obvious test points / jumpers / labels to that effect.

Two days of relentless spelunking produced my test weights:

Amazon EK3211 Scale - test weights

Amazon EK3211 Scale – test weights

Given the provenance of those weights, a 0.2% error might not be the scale’s fault, even if it cost barely 10 bucks.

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  1. #1 by Daniel B. Martin on 2017-04-06 - 08:15

    Love those Zero Dollar Repairs!