The JVC AV-21VT15 FLAT COLOR TV was a popular television model released by JVC in the late 1980s or early 1990s. Notably, the "FLAT" designation in its name indicates that it featured a flat screen design, which was a relatively new and innovative technology at the time. This was in contrast to the bulky, curved CRT televisions that were prevalent in the market. The AV-21VT15 boasted a 21-inch screen size, a standard dimension for televisions during that era. It likely came equipped with various features common to televisions of its time, such as a built-in tuner for receiving over-the-air broadcasts, a remote control for convenient operation, and possibly even an AV input for connecting external devices like VCRs or video game consoles. The "Service Manual Download" aspect of the product name points to the availability of a comprehensive repair manual for the AV-21VT15. This manual was likely intended for authorized technicians and repair personnel, providing detailed instructions and diagrams to diagnose and fix any malfunctions with the television. The manual's contents, as outlined in the provided description, encompass a range of topics crucial for effective troubleshooting and repair, including safety precautions, specific service instructions, step-by-step disassembly procedures, adjustments for fine-tuning the TV's performance, and a detailed troubleshooting guide. The availability of such a manual ensured that qualified technicians could efficiently address common and uncommon issues that arose with the JVC AV-21VT15, extending its lifespan and ensuring its continued operation for many years to come.