SPT - Mamiya 500TL

Technical service publication from the Society of Photo-Technologists, November-December 1973 issue, providing detailed maintenance and repair guidance for the Mamiya Sekor 500TL single-lens reflex camera. This service manual combines disassembly procedures, operational theory, and step-by-step reassembly instructions specific to this interchangeable-lens model. The core technical content focuses on camera body construction with particular emphasis on bottom-plate assemblies—wind lever mechanics, the diaphragm-meter switch system, spring tension arrangements, and shutter curtain adjustments. Annotated technical diagrams throughout identify internal components and their functional relationships, making disassembly and repair tasks clear for experienced technicians. A significant troubleshooting section addresses the exposure meter switch failures most common to this model, with practical diagnostic and repair solutions. The workshop manual also includes supplementary service notes, technical correspondence, professional industry listings, and details on camera repair training courses available during that era. Coverage extends to both the 500 and 1000-TL series. An invaluable reference for service professionals and repair technicians working on Mamiya cameras during the 1970s.