PETRI - Petri 7S Service Manual

Comprehensive repair manual for the PETRI 7S camera, published by PETRI Camera Company, Inc. This technical reference guide provides detailed procedures for maintenance, troubleshooting, and repair of this classic camera model. The manual is organized into three main sections covering the full scope of service work. The first section addresses common issues and fundamental repairs, including the winding mechanism, rewinding system, shutter assembly, aperture control, self-timer mechanism, flash synchronization, exposure counter, countdown counter, and rangefinder operation. The second section presents precise adjustment procedures: wind gear pawl and winding amount modification, slow speed escapement fine-tuning, self-timer gear calibration, shutter speed adjustment, MX delay action gear and fly wheel manipulation, synchronization contact alignment, exposure counter calibration, and rangefinder accuracy adjustment. The third section outlines a systematic final inspection process to verify all functions. An appendix provides a comprehensive table of specialized tools required for service operations. This manual serves as an essential resource for camera repair technicians and restoration specialists working with vintage photographic equipment, offering the manufacturer's authoritative guidance for returning these instruments to proper operating condition.