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Dreamcast CMOS Battery Replacement

Введение

When a Dreamcast ask for time and date every time you power on your system, your CMOS battery is dead. This guide shows how to replace the CMOS battery.

Please note this guide is outdated and I am going to be updating this guide.

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  1. Dreamcast CMOS Battery Replacement, Top Cover: шаг 1, изображение 1 из 1

    • Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.

    • Note: Remove the expansion bay to locate the fourth screw

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  2. Dreamcast CMOS Battery Replacement: шаг 2, изображение 1 из 1

    • Internal components can be loose. Be careful that they do not fall out when removing the cover.

    • Turn the console right side up.

    • Remove the top cover by gently lifting the upper portion of the console.

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  3. Dreamcast CMOS Battery Replacement, Controller Port: шаг 3, изображение 1 из 2 Dreamcast CMOS Battery Replacement, Controller Port: шаг 3, изображение 2 из 2

    • 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.

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  5. Dreamcast CMOS Battery Replacement: шаг 4, изображение 1 из 2 Dreamcast CMOS Battery Replacement: шаг 4, изображение 2 из 2

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

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  6. Dreamcast CMOS Battery Replacement: шаг 5, изображение 1 из 2 Dreamcast CMOS Battery Replacement: шаг 5, изображение 2 из 2

    • Disconnect the white fan header from the controller port.

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  7. Dreamcast CMOS Battery Replacement: шаг 6, изображение 1 из 2 Dreamcast CMOS Battery Replacement: шаг 6, изображение 2 из 2

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

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  8. Dreamcast CMOS Battery Replacement, CMOS Battery: шаг 7, изображение 1 из 1

    • Note where the positive and negative terminals go.

    • Desolder the old CMOS battery from the controller board.

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  9. Dreamcast CMOS Battery Replacement: шаг 8, изображение 1 из 1

    • Solder the replacement battery holder to two electrical wires.

    • Solder the opposite ends of the wires to the controller board. Make sure to match corresponding points on the board with where the previous positive and negative terminals were.

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  10. Dreamcast CMOS Battery Replacement: шаг 9, изображение 1 из 1

    • Reinsert the controller board.

    • Attach the battery holder inside with a self adhesive substance, such as double sided foam tape.

    • Insert the battery into the battery holder.

    • Reverse the disassembly directions to reassemble your Dreamcast.

    • Once your Dreamcast is reassembled, go ahead and connect the Dreamcast to your TV or monitor and power, and reset the clock.

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Заключение

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

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Dark Sakul

Участник с: 05/14/10

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For the step 7, you can get the cmos holder like this from ebay. This holder is perfect fit for the dreamcast controller board and easily replace the cmos battery if it drains out again.

leat - Ответить

Just as a heads up, the coin cell that was pictured in this guide (a CR2025 from what I can see) is not rechargeable. The stock battery is an ML2430, so a suitable replacement of about the same size as a CR2025 would be cells with the code ML20XX (ML2020, ML2025, ML2032).

Elanna - Ответить

Something that should be noted, even if the pictures kind of hint at it, is that the power board - the large board to the left of the console in Step 3, picture 1 - needs to be removed BEFORE the controller board can be taken out. On my DC the pins that connect the power board to the motherboard have a surprisingly strong grip, so I needed to pull up on that end with some force to get it off. Definitely something to be careful with, as you don't want those pins getting bent out of shape, never mind broken.

HGB - Ответить

You can still use something like a CR2025, just wire a diode on the power line. Something like 1N581 or 1N5711 will work.

M. Guy - Ответить

Dont use non rechargeble batteries. you can replace it with the little square batteries you found in chinese mp3 headphones… they’re 3.7v, 2000mah and are perfect for the console. This kind of lithium polimer batteries tend to hold charge for as much as six months according to my experience. And they’re easy available, if you can’t find one, just purchase those little chinese micro SD mp3 players/headphones , they’ll have one of this kind inside. Be sure the voltage is 3.7 at a maximum 2.000 mah

toniremords - Ответить

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