Introduction
Replacing the diopter adjustment dial requires removal of the rear panel of the device, as well as the removal of several small screws.
Tools
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            Remove the four 4.6mm J000 Phillips screws from the sides and two 3.2mm J000 Phillips screws along the bottom. 
 
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            Remove the two 3.2mm J000 Phillips screws located on the bottom edge of the viewfinder cover. 
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            Carefully remove the viewfinder cover. 
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            Remove the two 4.4mm J000 Phillips screws located near the top edge of the viewfinder. 
 
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            Slide the Wide Plastic Opening Tool upwards along the underside of the rear casing. 
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            Slowly lower the casing into the position shown. 
 
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            Use the Screwdriver J000 Phillips Head to remove the screw located at the lower-left corner of the face of the viewfinder glass. 
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            Carefully lift the L-shaped clicker underneath the previously removed screw. 
 
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To reassemble your device, follow these instructions in reverse order.