Introdução
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Please note this guide is outdated and I am going to be updating this guide.
O que você precisa
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Locate and remove all four black 12mm Phillips #02 screws from the underside of the console.
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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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Note where the positive and negative terminals go.
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Desolder the old CMOS battery from the controller board.
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Reinsert the controller board.
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Attach the battery holder inside with a self adhesive substance, such as double sided foam tape.
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Insert the battery into the battery holder.
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Reverse the disassembly directions to reassemble your Dreamcast.
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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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To reassemble your device, follow these instructions in reverse order.
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9Comentários do guia
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.
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).
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.
You can still use something like a CR2025, just wire a diode on the power line. Something like 1N581 or 1N5711 will work.
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
