The Atari 400, released in 1979 as part of its First Generation, represents a significant entry into the home computing landscape. Engineered with a MOS Technology 6507 CPU operating at 0.75 MHz and a Television Interface Adaptor (TIA) for graphics and sound, it offered a unique computing experience for its time. This model, with its distinctive physical dimensions and a robust design, was intended for a broad audience seeking interactive entertainment and basic computing capabilities. Its innovative features, including two controller ports supporting the Atari CX40 Joystick, set it apart in the burgeoning market.

This manual serves as a comprehensive guide for the Atari 400 console. It details essential information for operation, maintenance, and troubleshooting. Key areas covered include understanding the console's specifications, such as its graphics resolution of 160 x 102 pixels (NTSC) and two sound channels, as well as guidance on recommended cleaning procedures and storage conditions to ensure longevity. The manual also addresses common issues like keyboard membrane wear and heat dissipation, providing valuable insights for owners and technicians alike to maintain optimal performance and prolong the life of this classic piece of technology.