3.34 Install 20K trimmer potentiometer R47
The 20K single-turn trimmer potentiometer allows adjustment of the LCD contrast.
This potentiometer, similar to the 24-turn trimmer potentiometers installed on the main
QCX-mini PCB, has four little feet, one in each corner. Unfortunately these make the
trimmer too high and it may prevent the PCB from sliding into the QCX-mini enclosure later.
Therefore it is necessary to cut off the protruding feet using a wire cutter, so that the
potentiometer can sit flat on the PCB.
Follow the steps below to install this part.
Cut each little plastic foot using wire-cutters. It doesn’t matter if the corner of the
potentiometer body is damaged slightly.
In the end it could look like this.
Install and solder, with the potentiometer
body sitting flat on the PCB as shown. Trim
excess pin length from the bottom side.
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