OLYMPUS - olympus T20 tech

This comprehensive service manual covers the Olympus Electronic Flash T20, a series-circuit auto flash unit engineered for TTL camera systems. The technical documentation begins with detailed specifications including flash type, coverage angle (40° vertical and 56° horizontal), flash duration (1/40,000 to 1/1,000 seconds), and recycling times. The guide thoroughly documents operating modes in both AUTO and MANUAL configurations, with aperture-by-distance tables for ASA 100 and ASA 25 film speeds to help you select correct exposure settings. An illustrated nomenclature section identifies every control element and physical component on the flash head. The disassembly procedure walks technicians through removal of the upper housing, battery chamber, and internal assemblies using numbered step-by-step figures. A dedicated adjustments section provides precise instructions for calibrating electronic flash light output using a standard light meter and variable resistors on the circuit board. Over 100 replacement parts are cataloged in the parts list with corresponding part numbers for capacitors, transistors, diodes, transformers, and other electronic components. Exploded diagrams, complete wiring schematic, and AM circuit diagram round out the workshop manual, giving you everything needed for maintenance, repair, and restoration of the T20 flash unit.