Before installing the pickup, make sure there are no metalic objects or residues inside the instrument, usually from steel wool that instrument makers use to polish the frets.
The multichannel pickup is designed to fit into the recess that exists in every fretboard, as can be seen in the following schematic.
This is the standard shape of the fretboard's edge. The small screw of the pickup has a diameter of 2.2mm and the correct hole is 1.5mm. If the hole is a bit wider and the screw can't get a good hold, one can use the next market standard screw size which is 2.85mm.
If the hole is closer than 3mm on the vertical side or is too wide for either screw, it must be filled in with hard wood and glue so the correct hole may be remade later. Additionally, the distance of the hole from the edge must be less than 6mm. The ideal is for the protrusion to be no more than 10mm.
If there are imperfections on the wood or the recess is too deep and the pickup is too far away from the strings, a piece of thin cardboard or filling must be used. Do NOT, under any circumstances, try to bend the pickup's base.
The battery case includes a protective clip which can be detached easily with a small flat screwdriver. After inserting the new battery, press the top with your thumb until it enters the notches on the side of the battery case.
Included with the pickup is the extractor plug, which makes the placement of the circuit board and it's nut very easy and convenient. While new, the input jack is still too tight so it is necessary to only insert the extractor plug up to the first position and not fully, in order to allow for easy removal afterwards (the input jack is stereo and has two positions). The nut can be tightened by hand. If the 13mm wrench is used, however, avoid tightening too much.
The black and red cable terminals on the underside of the pickup do not need to be disconnected from one another. If they are, they must be re-connected in a way so that the protrusion of the black terminal does NOT point towards the side where the letters "N1" are written but instead to the opposite side, as can be seen in the image to the left.
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N1@bouzouki.me