Model Versions (Sinclair ZX Spectrum 128) Updated Apr 18, 2026 · 9 min read · Support · 0 viewing 🔥 Most active page right now Log in or register to read the full article. Previous 📄 Schematics (Sinclair ZX Spectrum 128) Below are several schematics for the various ZX Spectrum 128 models. ZX Spectrum + 128 All ZX Spectr... Next Power Circuit (Sinclair ZX Spectrum 128) The ZX Spectrum 128 gets three power rails directly from the external power supply . There are no...