The information you provided is inaccurate and misleading. The JVC AV N48P55 and AV N56P55 are **rear projection televisions**, not cars, trucks, or SUVs. These televisions were manufactured by JVC (Victor Company of Japan) and were popular in the late 1990s and early 2000s. They were known for their large screen sizes and relatively affordable prices compared to other flat-screen technologies of the time. These rear projection TVs used a system of lenses and mirrors to project an image onto a large screen, which was typically located inside a cabinet.

The "schematic diagram manual" mentioned in your description is a technical document that shows the internal circuitry and wiring of the television. This type of manual is often used by technicians for troubleshooting and repair. While it is possible to download schematic diagrams for some electronic devices online, it's important to note that these diagrams are typically for professionals and may be difficult to understand for someone without technical experience. It's important to remember that accessing and using technical documentation like schematic diagrams for a product without proper authorization or licensing may be a violation of copyright law. If you are experiencing issues with your JVC AV N48P55 or AV N56P55 television, it is always recommended to contact a qualified technician for assistance.