VIVITAR - Vivitar 285 service manual

Comprehensive service manual for the Vivitar Electronic Flash Unit Model 285 (Vivitar Part Number 3000008). This detailed technical document is intended for skilled service technicians and professionals equipped with the proper tools and equipment required to service this product safely and correctly. The manual features a thorough introduction presenting general specifications for the flash unit, including flash duration ranges (1/1000 to 1/30000 second in automatic mode, 1/1000 second in manual mode), illumination angles across different settings (Super Wide, Wide, Normal, Tele), color temperature rating (6000°K), and synchronization options (hot shoe, shutter cord). Detailed power source specifications outline available energy options: four AA-size alkaline batteries providing 75 flashes, NC-3 NiCad battery pack enabling 45 flashes, and SB-6 AC adapter for unlimited flash capability. Automatic f-stop parameter tables with corresponding distance ranges cover film speeds from ASA 25 to 400 and DIN 15 to 27. The publication includes exploded view drawings with comprehensive parts lists covering body assembly, sensor assembly, PC board A and D assemblies, PC board B assembly, and PC board C assembly with related components. Schematic diagrams and a PC board foil diagram provide complete electrical and mechanical documentation for thorough service and repair procedures.