Motorola Service Manual for Compa Station Repeater UHF 406-450 Ham/Commercial Radio includes tuning procedures, block diagrams, schematics, circuit board details, parts lists etc. See photo of section dividers for additional details. This manual is several hundred pages and is very thorough and detailed. Bound in the original sturdy 3 ring binder. It appears to be complete but I can't really guarantee it. This is a treasure trove of information for this common and popular repeater system.