This comprehensive service repair manual provides essential information for repairing, servicing, rebuilding, or maintaining your CASIO DW-8000/9000 SERIES, W-700 SERIES, LW-23 SERIES, LQ-139 SERIES, BG-370K, CMD-40F, BG-380A, and BGX-120BD watches from 1997. It includes detailed diagrams, illustrations, and technical specifications, offering a complete understanding of these intricate timepieces. The manual contains a reference table, replacement models, interchangeable module table, spare parts information, and a list of additional module versions released in 1997. With its extensive coverage, this manual empowers you to tackle repairs and maintenance tasks confidently.

The Casio DW-8000/9000, W-700, LW-23, LQ-139, BG-370K, CMD-40F, BG-380A, and BGX-120BD series watches represent a significant chapter in Casio's history, spanning the mid to late 1990s. These models were pioneers in their respective categories, bridging the gap between basic timekeeping and innovative features. The DW-8000/9000, often referred to as "G-Shock," introduced rugged durability and advanced functionality that catered to outdoor enthusiasts and professionals. The W-700 series offered a blend of sporty design and practical features, while the LW-23 and LQ-139 lines focused on affordability and everyday wearability. The BG-370K, CMD-40F, BG-380A, and BGX-120BD models incorporated cutting-edge technology like altimeter, barometer, and compass functions, adding another layer of sophistication to the Casio lineup. These watches, while diverse in their appearance and specific features, shared a common thread – the pursuit of innovation and functionality within the constraints of a wristwatch. Casio's commitment to pushing boundaries is evident in the inclusion of features like water resistance, shock resistance, alarm clocks, chronographs, and even temperature sensors. These advancements made Casio watches not just timepieces but valuable tools for various activities. The popularity of these series solidified Casio's position as a leading manufacturer of affordable and reliable timekeeping devices. The desire for their robust design, advanced features, and affordability continued well into the 21st century, ensuring their lasting legacy in the world of watches.