Arcade machines, whether classic or modern, rely on stable and specific power supply requirements to function correctly. The most common voltage standards for arcade machines are 110V or 220V AC, depending on regional electrical standards. Inside the cabinet, a power supply unit (PSU) converts AC to DC, typically providing +5V, +12V, and -5V outputs to power the PCB, monitor, and other components.

Key considerations include:

- Voltage Stability: Fluctuations can damage sensitive arcade PCBs.

- Wiring Standards: Proper grounding and insulation prevent electrical hazards.

- Monitor Power: CRT monitors often require an isolation transformer for safety.

- Power Draw: Older machines consume 200-400W, while newer ones may use less.

Ensuring the correct power supply setup is crucial for longevity and performance. Always consult the machine’s manual or a professional for precise specifications.