Category:Sinclair Computers

The Sinclair Computers page is new!. Many of the pages do not exist, documentation has not been uploaded, and, the category is subject to change. If you wish to contribute, please do!

Welcome to the Sinclair Computers category! This section focuses on the restoration, maintenance, upgrades, and historical documentation of systems developed by Sinclair Research Ltd, including the groundbreaking ZX series and early British microcomputers.

Each system features:

• System-specific maintenance and cleaning guides
• Common faults and repair procedures
• Upgrade and modification resources
• Technical documentation and schematics

Model	Maintenance	Troubleshooting	Capacitor Guide
Sinclair ZX80	Sinclair ZX80 General Maintenance	Sinclair ZX80 Troubleshooting Guide	Sinclair ZX80 Capacitor Replacement Guide

Model	Maintenance	Troubleshooting	Capacitor Guide	Memory Upgrades
Sinclair ZX81	Sinclair ZX81 General Maintenance	Sinclair ZX81 Troubleshooting Guide	Sinclair ZX81 Capacitor Replacement Guide	Sinclair ZX81 Memory Upgrade Guide

Model	Maintenance	Troubleshooting	Capacitor Guide	Keyboard Repair
Sinclair ZX Spectrum	Sinclair ZX Spectrum General Maintenance	Sinclair ZX Spectrum Troubleshooting Guide	Sinclair ZX Spectrum Capacitor Replacement Guide	Sinclair ZX Spectrum Keyboard Membrane Repair

Model	Maintenance	Troubleshooting	Capacitor Guide	Disk Drive Maintenance
ZX Spectrum +2	ZX Spectrum +2 General Maintenance	ZX Spectrum +2 Troubleshooting Guide	ZX Spectrum +2 Capacitor Replacement Guide	ZX Spectrum +2 Floppy Drive Maintenance
ZX Spectrum +3	ZX Spectrum +3 General Maintenance	ZX Spectrum +3 Troubleshooting Guide	ZX Spectrum +3 Capacitor Replacement Guide	ZX Spectrum +3 Floppy Drive Maintenance

Model	Maintenance	Troubleshooting
Sinclair QL	Sinclair QL General Maintenance	Sinclair QL Troubleshooting Guide
ZX Interface 1/2	ZX Interface Maintenance	ZX Interface Troubleshooting

• Recommended Tools – Must-have tools for repairing vintage Sinclair machines.
• Capacitor Failure Symptoms – How to identify bad capacitors before failure.
• Keyboard Repair Guide (Rubber Dome) – Covers ZX Spectrum-style keyboard membranes.

• Category:Repair Guides – General-purpose repair documentation.
• Category:Service Manuals – Official and third-party service materials for Sinclair systems.
• Category:Capacitor Replacement Guides – All capacitor guides in one place.

• List of Sinclair Computers
• RTC Forum – Sinclair Community Section
• Category:Vintage Computers