A20112 Power: Supply Schematic
The A20112 is a switch-mode power supply (SMPS) designed for the Namco System 246 and 256 arcade motherboards. Unlike standard PC ATX power supplies, the A20112 utilizes a custom form factor and a dedicated single-row output connector to interface directly with the arcade I/O board. It is a high-efficiency unit capable of delivering substantial current on the +12V rail to power the console's cooling fans and disc drives, while maintaining stable low-ripple voltage for the sensitive CPU and RAM (+3.3V and +5V).
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What is the the power supply is from?
Here is the block-level breakdown of the :
sitting on a desk; instead, you’ll find it hidden inside the "brains" of other systems. It is the go-to choice for: a20112 power supply schematic
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The following report details the functional architecture, component analysis, and troubleshooting guidelines based on the known design topology of this unit. The A20112 is a switch-mode power supply (SMPS)
The a20112 power supply schematic consists of the following components:
| Pin Number | Voltage | Wire Color (Typical) | Function | | :--- | :--- | :--- | :--- | | 1 | +12V | Yellow | Drive / Fan Power | | 2 | +12V | Yellow | Drive / Fan Power | | 3 | GND | Black | Common Ground | | 4 | GND | Black | Common Ground | | 5 | +5V | Red | Logic Power (CPU/GPU) | | 6 | +5V | Red | Logic Power | | 7 | +3.3V | Orange | I/O & Logic | | 8 | +3.3V | Orange | I/O & Logic | | 9 | GND | Black | Common Ground | | 10 | GND | Black | Common Ground | This public link is valid for 7 days
I'm currently troubleshooting an (commonly found in all-in-one PCs or small form factor desktops, often a 180W-200W unit).
Here’s a quick breakdown of what you’ll typically find in the :
