hm question , maybe you can just get the 220V socket adapter for psu from deal extreme or smthn ? if you know what i mean. I guess the problem is with different wall sockets in japan and uk?
We use a different electricity system too, ours is AC and they use DC so we need to use either a step down converter which I won't use, or what I want to use... a switching power supply.
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Could you post pictures of the connector of the Turbo Duo, and the stickers on both power bricks?
Are both power bricks held together with screws (maybe behind rubber feet)? Some bricks are glued shut which makes popping them open that little bit riskier.
I havne't yet bought the psu I want to use, I was just going to get it mailed direct to whoever is doing the work to save on postage. The original Jap psu has accessible screws to get into the main brick. The connector jack is like the usual console ones, it is 5mm diameter with a 3mm inside hole. According to various websites it is a non standard size which is why it is hard to simply buy replacement psu's for the system.
What do you want to know on the brick? the psu I have found to use has the same voltage and a slightly higher amperage, the tip polarity is also the same according to the diagrams on both power supplys.
On another note, with this job I am also looking for the same person to remove the DSP from a Pilotwings cart and install in my Super Everdrive.