This comprehensive service manual provides detailed technical information for Toshiba Color TVs models 40H80 and 56H80, covering various aspects of their operation and maintenance. The manual is designed for technicians and service professionals and includes vital information for troubleshooting, repair, and adjustment. It covers key areas such as setting and adjusting data, location of controls, programming channel memory, circuit block diagrams, chassis and cabinet replacement parts lists, PC board bottom views, and terminal views of transistors.