Section 3, Machine Troubleshooting - gives overall troubleshooting techniques and references for both hardware- and software- related problems.Section 2, Machine Installation – provides installation instructions, maintenance and customer service information, and procedures to verify that the machine is functioning correctly.Section 1, Introduction & Specifications – provides an introduction to the S-Plus machine models, including component and hardware identification, list of features and options and operating specifications.Don’t miss it! If you own an IGT machine you should have one!!! Don't get stuck with the one someone made on a home PC to sell, they are listed and do not contain the same detailed information! The below information is from the manual 'ABOUT THIS MANUAL' page: About This Manual The S-Plus Stepper Slot field service manual contains information required to install, maintain, adjust and repair the S-Plus machines. This is the Official Repair Manual that ONLY AUTHORIZED Casino’s use. IGT S+ Slot Factory Field Service Manual (Covers all Model’s like Double Diamonds, Red White and Blue, Haywire, Triple Diamond, Ect…) This Manual sells for over $100, and for good reason it has hundreds of pages of charts, graphs, illustrations, Wiring diagrams (all electrical schematics are full size 11 x 17 fold out size), exploded views of all components with each part number listed as well as invaluable repair and replacement information.