Introduzione
Use this guide to replace the volume potentiometer of your OP-Z. 
In case the defect was caused by a drop then the volume knob was probably damaged too. This guide will also show how to replace the knob which can be purchased separately.
Strumenti
Ricambi
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            Unlock the four rubber feet by turning them 90° counterclockwise using your thumb or finger tip. 
 
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            When turning the OP-Z over again the bottom plate should come off by itself (thanks gravity). 
 
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            Use your finger or a spudger to push up on the small tab on the bottom of the module. 
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            Lift the module up and out of its recess bottom first. 
 
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            Slowly pry the USB-C connector out of its recess. Use the flat end of a spudger on the small nib on the USB-C board. 
 
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            The highway flex cable is slightly adhered to the midframe. To remove it, gently push it out from underneath. 
 
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            Use a pair of flat nose tweezers to pull the small flex cable up and out out the ZIF connector. 
 
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            Use a spudger to lever up the axle of the volume potentiometer. This way it will clear the frame’s cutout. 
 
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To reassemble your device, follow these instructions in reverse order.