Blog and Tutorials of Repair
Repair guides, published schematics, firmware, and R&D progress on the Z80 platform. Written by hardware engineers and documented board by board.
12 plates tested
29 published schemes
Latest Entries
How will the new SD81Booster be for ZX80 and ZX81
SD81Booster expands ZX80 and ZX81 with microSD, 512 KB of paged RAM, AY sound, and expanded graphics without losing compatibility with the…
Tutorial repair ZX Spectrum 48K by Manuel Cuenca. First steps to repair your ZX Spectrum. First and second part
First steps to diagnose your ZX Spectrum 48K with the help of Manuel Cuenca: power supply, connection, types of board and measurement of…
Everything you need to know about your ZX-Usb. News and updates.
Reference post of the ZX-Usb: user guides, first video review, initial pack and game patches for Next/N-Go available for…
Repair of the Acorn BBC and the history of Acorn with Sinclair and Amstrad CPC
Manuel Cuenca repairs an Acorn BBC and reviews the history of Acorn: from the BBC Micro to the rivalry between Sinclair and…
ZX-Usb a very special peripheral for your ZX-Spectrum & N-GO/NEXT.
The ZX-Usb connects modern USB controllers, keyboards, and up to 16 configurable buttons to your ZX Spectrum. Project by MAD3001 adapted by RancanuoTeam.
Repair ZX Spectrum 48k by Manuel Cuenca. A real pro!!
Jose Antonio Solano sends his ZX Spectrum 48K rubber keyboard to Manuel Cuenca (mmchip): full diagnosis and repair. One...
Guide to Repairing ZX Spectrum 48K
Diagnosis of voltage lines (-5V, +12V, +5V), low RAM failures, and replacement of faulty components. Medium / Advanced Difficulty · 12 min reading.
SD81Booster: Synchronous Z80 bus + Direct Micro-SD SPI
Massive storage and latency-free RAM for ZX80 / ZX81 without modifying the ULA. Hardware Preservation · 10 min reading.