The Sharp PG-MB56X and PG-MB66X projectors are professional-grade devices designed for high-performance presentations and installations. These models are known for their bright, high-resolution images, versatile connectivity options, and robust build quality. They are part of Sharp's XG-MB series, which also includes the XG-MB55X-L, XG-MB65X-L, and XG-MB67X-L models. The service manual for these projectors provides a comprehensive guide for technicians and users, covering various aspects of operation and maintenance. The manual begins with safety precautions, emphasizing the importance of handling the projector with care and following proper operating procedures. It then delves into the operational details, explaining the projector's functionalities and controls. A key section focuses on the removal of major parts, providing detailed instructions for dismantling and reassembling the projector for repair and maintenance. The service manual also includes a thorough explanation of the optical unit, covering its components, alignment, and adjustment procedures. Electrical adjustment and troubleshooting are also covered extensively, with a dedicated table outlining common issues and their possible solutions. The manual concludes with sections on major IC information and block diagrams, providing in-depth technical details for advanced troubleshooting and repair.