SPT - 1971
This 1971 technical service manual collects detailed electrical schematics for photographic flash units from the SPT brand across four pages of professional wiring diagrams. The collection covers four distinct flash models with complete circuit documentation needed for repair and maintenance work.
The first schematic details a variable Vivitar flash unit featuring a transformer-based power supply, high-voltage capacitors rated at 300V, 350V, and 500V, resistors, and a flash tube with integrated synchronization and triggering circuits. The second page shows the Goldcrest SR-30 with neon indicator tubes, charging circuits, and control systems. Page three presents the Goldcrest SR-35 schematic, organized with modular component layout. The final schematic documents the complete Vivitar Speedlight 40 flash unit, illustrating how its synchronization circuits, transformers, filtering capacitors, and protection systems integrate together.
Each diagram includes precise component values—resistor ratings, capacitor specifications, and inductor designations—along with operating voltages and connection points throughout the circuits. This repair guide serves technicians working on photographic flash equipment from the early 1970s, providing the electrical reference data essential for troubleshooting and component replacement.
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 4
- Size
- 908.0 KB
- Category
- Photography