Grounding is a critical aspect of arcade machine maintenance and safety, preventing electrical hazards and electrostatic discharge (ESD) damage. The most common grounding techniques include:

1. Chassis Grounding – Connecting the metal frame of the arcade cabinet to the earth ground to prevent electric shocks.

2. Signal Grounding – Ensuring all low-voltage circuits (like control panels and PCBs) share a common ground to avoid interference.

3. Earth Ground via Power Supply – Using the power supply’s ground pin to establish a safe path for excess electricity.

4. ESD Protection Grounding – Adding anti-static mats or wrist straps to protect sensitive components during repairs.

5. Separate Grounding for Audio/Video – Isolating grounding paths for audio and video circuits to reduce noise and interference.

Proper grounding ensures longevity and safe operation of arcade machines, making it essential for both vintage and modern cabinets. Always follow manufacturer guidelines and electrical safety standards when implementing grounding solutions.