Power Supply System Help

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    • Power Supply System Help

      Hey all!

      I'm currently assembling my custom arcade cabinet, and was hoping someone could help clarify some aspects of the power supply system for me.

      There are plenty of good resources outlining the general construction, and they all follow pretty much the exact same layout.

      I currently already have my switching power supply and fuse-built-in power cable + switch.

      I understand the purpose of the ac line filter (attenuating line noise both in and out), as well as the isolation transformer (reducing monitor amperage w/ a 1:1 voltage output for safety).

      However, I am not using an original CRT but instead a multi-sync LCD. So I'm wondering - do I need that isolation transformer?

      Also: for a power distribution block like this, does connection power to any one terminal connect power to all other terminals?

      The post was edited 1 time, last by Escher: Clarification ().

    • Escher wrote:

      I understand the purpose of the ac line filter (attenuating line noise both in and out), as well as the isolation transformer (reducing monitor amperage w/ a 1:1 voltage output for safety).

      However, I am not using an original CRT but instead a multi-sync LCD. So I'm wondering - do I need that isolation transformer?

      Nope, you don't need one.

      Also: for a power distribution block like this, does connection power to any one terminal connect power to all other terminals?

      Nope, it's in the product description: "Each pair of terminals is insulated from the next, prevent circuit in disorder". You could always jumper the terminals if you wanted to.
    • even 1980 monitors like the classic G07 have filters & fuses.

      as for the fuse, take the maximum of your stuff and add it up.

      so an example.

      monitor 3a @ 12v (lcd) is going to be something like 200ma at 230v but we will call it 1a.
      psu is probably fused at 2a
      extra shit like amplifiers, illumination etc 1a.

      just call it 3-5a

      old machines with crt's and 7a psu's used to be fused at 3a btw.