A Service Manual is a comprehensive document that provides detailed instructions on how to maintain, repair, and troubleshoot a specific product or system. It typically includes diagrams, specifications, and step-by-step procedures to help users understand the workings of the item. Service manuals are essential for technicians and service personnel to ensure proper handling and servicing of equipment. These manuals are commonly used for various products, including vehicles, appliances, and electronic devices. For example, a car service manual may contain information on engine maintenance, while a computer service manual might cover hardware upgrades and software troubleshooting.