S1202-2 Schematic May 2026

While germanium transistors and selenium rectifiers are now obsolete, the circuit can be successfully rebuilt with modern silicon equivalents. With patience, a good multimeter, and a careful eye on the schematic, the S1202-2 can provide another 50 years of reliable service. Have you restored an S1-202 or worked on an S1202-2 module? Share your experiences and mods in the comments below.

when working on this oscilloscope. Discharge the HV filter capacitors (marked on the schematic as C20-C24 typically) using a 10 MΩ, 5W resistor before touching any component. Conclusion The S1202-2 schematic is a masterpiece of practical Soviet engineering. It trades complexity (an inverter stage) for component weight and cost, creating a compact, albeit finicky, HV supply. For the modern restorer, understanding this schematic is 90% of the battle in resurrecting an S1-202 oscilloscope. s1202-2 schematic

S1202-2 schematic, S1-202 oscilloscope, Soviet oscilloscope repair, dual-beam scope, CRT high voltage, vintage electronics, blocking oscillator. While germanium transistors and selenium rectifiers are now