The information you provided does not describe a vehicle, but rather a television model: the Toshiba Projection TV 46H84, 51H84, 57H84. This series of televisions, manufactured by Toshiba, was known for its large screen sizes and projection technology, offering viewers an immersive home theatre experience. The models 46H84, 51H84, and 57H84 refer to the screen diagonal sizes: 46 inches, 51 inches, and 57 inches respectively. These televisions were likely popular in the late 1990s and early 2000s, before the advent of flat-screen televisions.

The provided excerpt from the service manual suggests that these TVs featured advanced features for their time. The "SETTING & ADJUSTING DATA" section likely refers to manual adjustments for picture quality, such as brightness, contrast, and color settings. The "LOCATION OF CONTROLS" section likely indicates the placement of buttons and other controls on the television. Adding channels to the TV's memory suggests that the televisions supported a variety of input sources, possibly including cable or satellite TV. The "MECHANICAL DISASSEMBLY" and "CHASSIS REPLACEMENT PARTS LIST" sections demonstrate the intricate engineering behind these televisions, likely featuring complex mechanical components and electronic circuitry. These televisions were likely designed to provide a high-quality viewing experience, and the service manual provides detailed information for technicians to understand and repair these complex devices.