The provided information refers to a JVC AV-21MS15 FLAT Color TV, not a vehicle. The document mentioned is a service manual for this specific model of television set, which includes information on disassembly, adjustment, troubleshooting, and specific service instructions. The manual covers multiple variations of the AV-21MS15 model, including the AV-21MS15/H, AV-21MS25/A, AV-21MX55/S, and AV-21MX75/L. The manual itself is a PDF document totaling 65 pages, providing a comprehensive guide for technicians working on these television sets.

The JVC AV-21MS15 FLAT Color TV was likely a popular model in its time, offering a flat screen design which was considered innovative for its time. It's impossible to pin down a specific release year without further research, but this type of television would have been marketed during the late 1980s or early 1990s, when flat-screen technology was starting to become more prevalent. The model number and variations suggest that JVC offered various versions of the AV-21MS15, likely with different features and specifications, catering to different consumer needs and budgets. The service manual for this model is a valuable resource for anyone involved in repairing or maintaining these television sets, providing detailed instructions and guidance for addressing common issues, performing adjustments, and understanding the internal workings of the device.