Sega Dreamcast Logic Board Removal - ric

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Introduction

A guide to remove the Logic Board from the Sega Dreamcast.

What you need

Step 1 Sega Dreamcast Logic Board Removal

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Verify that the console is disconnected from the AC outlet before you begin.
Flip the console over on its back.
Take note of your model number, in case replacement parts are needed.

Step 2

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Remove the expansion bay by applying pressure to the small clip on the expansion bay while prying it away from the console.

Step 3

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Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.
The fourth screw is hidden under the expansion bay if it has not already been removed.

Step 4

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Be careful that the internal components do not topple out.
Flip the console topside up.
Remove the top cover of the chassis by gently lifting the upper portion of the console.

Step 5

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Verify that the console is disconnected from the AC outlet before you begin. If you have just powered off the system, give the capacitors a few minutes to discharge before you begin working.
Remove the white female pin header by clamping the clip and pulling it up gently from the power board.

Step 6

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Remove the two 10mm Philips #02 screws that are fastened to the power block.

Step 7

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Do not bend the male pin header between the mounted head when you remove the power supply from the chassis.
Remove the power board by using both hands to gently lift the power board away from the console.

Step 8

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Remove the clear plastic film that is tucked between the power supply and the chassis.

Step 9

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Be gentle with the white controller cable as it can be a bit fragile.
Disconnect the white controller cable by gently pulling the the cable while wiggling it back and forth until it detaches from the controller board.

Step 10

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Remove the four 14mm Philips #02 located on the controller board.

Step 11

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Disconnect the white fan header from the controller port

Step 12

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Remove the controller board by lifting it up from the controller port.

Step 13

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Detach the orange cable by giving it a gentle pull while wiggling the cable back and forth until it loosens from the logic board.

Step 14

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Detach the cables by gently pulling the three GD-ROM cables to remove them from the logic board.

Step 15

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Remove the two black 12mm Philips #02 screws located on the left side of the GD-ROM bracket.
The console is rotated 90 degrees counter-clockwise in the first photo. The second photo depicts the normal position.

Step 16

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When lifting the GD-ROM, be careful that the top half of the casing does not detached from its base.
Remove the GD-ROM by gently lifting it from its base.

Step 17

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Remove the white fan header by gently pulling it away from from the controller port.
The white fan header may already be detached if you have completed the Controller Port Disassembly Guide.

Step 18

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Remove the two 8.5mm Philips #00 screws from the fan bracket.

Step 19

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Remove the two 17.5mm Philips #00 screws from the fan bracket.
Remove the fan from the bracket.

Step 20

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Remove the five 10mm Philips #02 screws from left side of the logic board cover.
Remove the three black 12mm Philips #02 screws from the right side of the logic board cover.

Step 21

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Lift the metal cover from the console.

Step 22

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Before handing the logic board, you may want to use a grounding strap to protect the device from static charge. If you do not have a grounding strip, you may ground yourself by touching a large metallic object.
Remove the logic board and set the logic board on an anti-static surface.

Conclusion

To reassemble your device, follow these instructions in reverse order.

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