MartinLogan Motion 4i Crossover Replacement

はじめに

This guide will show you how to properly disassemble the speaker in order to safely remove and replace the crossover.

The crossover is an integral part of the speaker, as it divides the frequencies put out by the speaker and sends them to the right output. Damage to this part can disrupt where the frequencies are sent and further damage other parts of the speaker. An indicator of a worn out crossover is a dip in sound quality from the speaker.

While following this guide, ensure that you know how to properly handle a soldering iron as it is required in later steps. The hot iron can damage other internals if it makes contact with them, but it can also burn the user.

必要な工具と部品

手順1 Back Cover

MartinLogan Motion 4i Crossover Replacement, Back Cover: 手順 1、 2の画像 1

MartinLogan Motion 4i Crossover Replacement, Back Cover: 手順 1、 2の画像 2

Remove the speaker grill from the face of the speaker by using both hands to grip both ends of the speaker grill and pulling up to release the magnetic ends.

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手順2

MartinLogan Motion 4i Crossover Replacement: 手順 2、 3の画像 3

Remove the six caps from the outer edge of the face of the speaker with an iFixit opening tool.
Make sure to remove the rubber caps slowly and carefully so that the ends won't break off and create a blockage above the screws.

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手順3

Remove the six 4 mm Phillips #2 screws that are located inside each of the holes where the rubber caps used to be.
The screws vary in depth, therefore you will need a Phillips #2 screwdriver that is around 6 inches in length from the tip to the start of the handle.

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手順4

Place the device face-down, then lift off the back case with both hands.
The speaker sometimes takes a little effort to remove the speaker back, so we recommend that you give it a couple shakes by placing each hand on the speaker face and the back when shaking.
If you decide to use the shaking method, make sure you're near an immediate surface near you just in case it drops.

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手順5

Lightly grip the material that insulates and covers the speaker components and remove it by pulling up.

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手順6

Remove both wires that are connecting the back of the speaker to the components of the speaker to fully access the speaker components.

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手順7 Crossover

MartinLogan Motion 4i Crossover Replacement, Crossover: 手順 7、 2の画像 1

MartinLogan Motion 4i Crossover Replacement, Crossover: 手順 7、 2の画像 2

Remove the four 3 mm Phillips #2 screws found at the top of the crossover.

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手順8

Using the soldering iron, remove the solder from the connections that are holding the wires in place before removing the connections entirely.
When removing and replacing the crossover, use extra care when using the soldering iron. The iron is incredibly hot and can burn the user if it is not handled with care.

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