Uploaded July 2023 | Updated September 2026, 2 weeks ago

---

Today, let's try to fix a TR-0458/B function generator made in Hungary probably in the early 1980s. This is a 0.0001Hz to 1MHz function generator (sine wave, square wave, triangle wave, sawtooth) with 58 transistors and 4 OpAmps. Finding the faulty component, aligning it, the schematic, how does it work.

The schematic:
blunk-electronic.de/datasheet/schematics/tr-0458-emg12564b.pdf

Please support my channel on Patreon:
patreon.com/DiodeGoneWild

Instagram:
instagram.com/savage_danyk