For arcade cabinet owners and enthusiasts, understanding the power supply and backup systems is crucial for both operation and preservation. The most common type of power supply found in classic arcade games is the Linear Power Supply. These robust units, often housed in a large metal box, use a heavy transformer to step down the wall voltage. They are known for their reliability but are less efficient and generate significant heat. In modern restorations and newer machines, the Switching Mode Power Supply (SMPS) is predominant. These compact, lightweight, and highly efficient units are the standard for JAMMA cabinets and multi-game boards. They provide stable, multi-voltage outputs (+5V, +12V, -5V) essential for the game's PCB, sound amplifier, and other components.

Beyond the main power supply, backup systems are critical for protecting valuable data. The most common backup system is the Battery Backup RAM. Many arcade PCBs use a small amount of battery-backed RAM to store crucial information like game settings, calibration data, and most importantly, the high score table. A small lithium or NiCd battery, often soldered directly to the PCB, provides power to this memory when the main cabinet is turned off. However, these batteries can leak over time, causing catastrophic damage to the circuit board. A modern and safer alternative is the NVRAM (Non-Volatile RAM) module. This chip replaces both the standard RAM and the battery, using a small internal capacitor to retain data safely for years without the risk of battery leakage. For operators, uninterruptible power supplies (UPS) can also be used as a larger-scale backup to protect entire cabinets from power surges and brief outages, preventing accidental resets during gameplay. Proper maintenance of these systems ensures your arcade machine remains functional and preserves its historical data for years to come.