Marshall MS-2 Micro Amp Circuit Board Disassembly

はじめに

The following guide is a step-by-step process on how to disassemble a Marshall MS-2 Micro Amp Case to gain access to the circuit board, and how to properly remove the circuit board.

Your device may have a damaged circuit board if it smells of smoke, or as if something is burning. Another sign of possible circuit board damage is if the volume, tone, and/ or power knobs do not work. For help with common problems, check the MS-2 Troubleshooting Page.

Circuit boards are important because they serve as the central source for all electronic components within the device. A Marshall MS-2 Micro Amp can be damaged if the amp is exposed to environmental conditions such as heat, dust, or moisture. It can also be damaged a by power overload or surge, or if the device is dropped.

The following guide shows how to turn the Marshall MS-2 Micro Amp off, how to remove its battery, and how to take off the back panel of the amp to access the circuit board. Steps 1-4 are also found in the Disassembling Marshall MS-2 Micro Amp Case Disassembly guide also found here. Steps 5-7 give a description of how to properly remove the volume, tone, and power knobs, and finally how to remove the circuit board itself. Please use caution not to touch any of the wires.

必要な工具と部品

手順1 Disassembling Marshall MS-2 Micro Amp Case Disassembly

Marshall MS-2 Micro Amp Circuit Board Disassembly, Disassembling Marshall MS-2 Micro Amp Case Disassembly: 手順 1、 1の画像 1

First be sure to turn the power switch to the off position.
Do this by turning the leftmost knob counter-clockwise as until the line points to "off."

翻訳

手順2

Marshall MS-2 Micro Amp Circuit Board Disassembly: 手順 2、 3の画像 3

Now remove the battery.
On the back of the device locate the battery cover.
Remove it by pushing down on the clip.
Then pull the piece of fabric until the battery comes out.

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手順3

Use the long, skinny phillips head screwdriver to remove the 4 7/16" screws on the back of the device in the four corners.
Once unscrewed, do not try to take each screw out. Move to next step once all screwed have been unscrewed.

翻訳

手順4

Now pull the back panel off and place it down as shown. Pull the panel straight up so you do not lose the screws.

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手順5 Marshall MS-2 Micro Amp Circuit Board Disassembly

Marshall MS-2 Micro Amp Circuit Board Disassembly, Marshall MS-2 Micro Amp Circuit Board Disassembly: 手順 5、 3の画像 1

Marshall MS-2 Micro Amp Circuit Board Disassembly, Marshall MS-2 Micro Amp Circuit Board Disassembly: 手順 5、 3の画像 2

Marshall MS-2 Micro Amp Circuit Board Disassembly, Marshall MS-2 Micro Amp Circuit Board Disassembly: 手順 5、 3の画像 3

Remove the volume, tone and power knobs by pulling them straight away from the front of the device. If they do not come off easily use the wedge tool to pry them up.

翻訳

手順6

Use a 10mm socket to remove the nuts from the volume and tone potentiometers.
Use a 11mm socket on the power switch nuts.
Use a 9/16" socket to remove the nut from the input jack.
Take care when you remove the nuts to not lose the washers.

翻訳

手順7

Marshall MS-2 Micro Amp Circuit Board Disassembly: 手順 7、 3の画像 3

Now you must remove the LED from the circuit board.
To do this you will need to use a soldering iron to detach to two pins of the LED from the board. They are the two pins in the lowest leftmost corner of the board.
Be careful to not touch any of the wires with the soldering iron. It might be helpful to remove those with the iron first to get them out of the way.
If you haven't soldered before check out this guide.
Once detached, pull the board straight up to remove.