The information provided does not describe a vehicle, but rather a series of projection televisions manufactured by Toshiba. The models 46HM84, 52HM84, and 62HM84 likely refer to the screen size of these televisions, with 46, 52, and 62 inches respectively. The text you provided seems to be an excerpt from a service manual, detailing various aspects of the television's internal workings and components.

The Toshiba projection televisions were likely popular home entertainment devices during their production years. They utilized a projection system to create a larger image on the screen compared to traditional CRT televisions. These models likely featured advanced features for their time, such as multi-channel audio, high-resolution images, and possibly even built-in DVD players. The service manual, as indicated by the text excerpt, would have provided detailed instructions and diagrams for technicians to diagnose and repair any issues with the television. While these models are now considered outdated, they were important milestones in the evolution of home entertainment technology.