Introduction
Between the neck and the body of the guitar, there are connectors called pogo-pins. Over time, the springs in the pins wear out and cause inputs to not be read by the controller. This repair replaces the pogo-pin connection with a DB9 connection allowing for the inputs to be properly read while keeping the ability to do maintenance on the controller in the future.
Tools
Parts
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Have the controller on its back and separate the neck and body of the guitar. Do this by using the switch on the back and pulling the neck from the body at the same time.
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Open the body of the guitar by unscrewing 11 10 mm screws from the circled screw holes with a Torx T10 screwdriver.
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Open the body of the guitar so it's laying open as seen in the image.
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Separate the wires by pulling them apart.
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De-solder the wires from the connector by pressing the iron against the solder points and then pulling the wire away.
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Using a Torx T10 screwdriver, unscrew the eight 10 mm screws along the circled screw holes to take the backing off the guitar's neck.
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Separate the wires using an X-acto knife to cut between the wires and pull to fully separate the wires.
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Desolder the wires by pressing the iron against the solder points and pull the wires away.
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In order to use the DB9 connectors, you need to cut the sides off of it so it can fit in the shell of the guitar.
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Use flux and solder to stitch the two sides of the metal sheet together.
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Before soldering the wires to the connectors, make sure to color the wires. This makes sure that you are soldering the correct wires to the connectors.
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The wire colors for the neck are as follows: 1-Green, 2-Dark Blue, 3-Light Blue, 4-Orange, 5-Dark Blue, 6-Yellow, 7-Red, 8-Dark Blue.
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Solder the wires to the DB9 connectors leaving the middle pin empty to make it easier to put the connectors in the body.
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After the wires are soldered, you can close the guitar and reverse the process of taking apart the controller.
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To reassemble your device, follow these instructions in reverse order.