Sega CD Motherboard/AC Power Board Replacement

Using a Phillips head screwdriver remove six screws from the bottom of the console.

The six screws are marked.

Remove the two screws that attach the Genesis' connector to the rest of the console.

The two screws are marked in the diagram.

Slide the lock tab to the left to separate the halves of the console.

Lift from the left side to remove the top of the case.

Using the spudger, pry the cover off of the Genesis attachment.

Lift the top of the case to remove the cover.

Remove the faceplate by pulling it up, then out.

Remove metal plate by unscrewing the three screws with the Phillips head screwdriver and then lifting the plate.

The three screws are shown on the diagram.

Remove the two screws from the plastic bar.

The two screws are shown pictured.

To remove the CD tray

Remove the four screws with the Phillips head screwdriver.

Carefully unplug the wire connected to optical reader.

Remove the four screws on the underside of the CD tray with a small Phillips head screwdriver.

The four screws are highlighted on the diagram.

Carefully remove the CD tray from circuit board.

Remove the two bronze screws from the metal plate with a medium Phillips head screwdriver.

The screws are marked on the diagram.

Carefully lift the metal plate up to expose the motherboard.

There is a wire strip running through the metal plate that is soldered to motherboard and power supply board. The plate cannot be completely removed. Do NOT force plate upwards. All the ribbon cables can be safely unplugged by simply pulling them out of their slots.

Carefully lift off the metal plate, the motherboard, and the CD tray circuit board. Then, flip each piece over, as pictured.

Remove the two screws from the power supply using a medium Phillips head screwdriver.

The two screws are marked on the diagram.

Remove the power supply unit from the console by lifting the unit up.

This is what the motherboard unit will look like once removed.