Here’s a clear breakdown of the — commonly found on Sony’s UniLink , multi-connector , or system control ports used in older Sony TVs, VCRs, Hi-Fi systems, and some car audio head units. 🔌 Typical Sony 16-Pin Connector (Side or Rear View) Pin numbers are usually marked on the plug/socket (1–16). The diagram below shows pin functions for Sony’s AV / system control interface (found on Trinitron TVs, VCRs, and mini Hi-Fi systems).