Sega Master System II Motherboard Replacement

步骤 1 Outer Case

Sega Master System II Motherboard Replacement, Outer Case: 步骤 1 中的图像 1，1

Flip the console on its back and unscrew the 5 screws marked on this photo.

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步骤 2

Sega Master System II Motherboard Replacement: 步骤 2 中的图像 1，1

Once you've unscrewed those 5 screws, flip the console upright again.

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步骤 3

Sega Master System II Motherboard Replacement: 步骤 3 中的图像 1，2

Sega Master System II Motherboard Replacement: 步骤 3 中的图像 2，2

Once the console is upright, first gently pull the rear of the top up.
After the top is at an angle, gently remove it by pulling upwards.
Note: Be very careful! The top has 2 tabs connecting it with the bottom half, those are in the vincinity of the 2 controller ports! (marked yellow)

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步骤 4

Sega Master System II Motherboard Replacement: 步骤 4 中的图像 1，1

Once the 2 halves are separated, it should look something like this.

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步骤 5 Motherboard

Sega Master System II Motherboard Replacement, Motherboard: 步骤 5 中的图像 1，1

Next step is the removal of the RF shield.
There are 7 screws in total, please unscrew those.
The blue marked screw is shorten than the other 6 screws, this screw has to be put back in the exact same location during reassembly.
Note: Tab marked in yellow!

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步骤 6

Sega Master System II Motherboard Replacement: 步骤 6 中的图像 1，1

Carefully lift the RF shield up, left side first.
See the note in the previous step.

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步骤 7

Sega Master System II Motherboard Replacement: 步骤 7 中的图像 1，2

Sega Master System II Motherboard Replacement: 步骤 7 中的图像 2，2

Now we have a complete view of the motherboard, thus coming to the last step.
For this step you only need to remove 3 remaining screws.
2 screws on the connector.
There's 1 shorter screw as previously with the RF shield. This small screw keeps the voltage regulator in place.

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步骤 8

Sega Master System II Motherboard Replacement: 步骤 8 中的图像 1，1

When you've disassembled everything, it should look like this.
Once you've got the replacement board, just follow this guide in reverse order.