Category:Sinclair Computers

Sinclair Computers
Preserving the Legacy of British Home Computing: ZX80, ZX81, Spectrum and More

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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

🖥️ Sinclair ZX80

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

🖥️ Sinclair ZX81

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

🎨 Sinclair ZX Spectrum (16K / 48K / Plus)

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
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

🖥️ Sinclair ZX Spectrum 128 / +2 / +3

Model	Maintenance	Troubleshooting	Capacitor Guide	Disk Drive Maintenance
Sinclair ZX Spectrum 128	Sinclair ZX Spectrum 128 General Maintenance	Sinclair ZX Spectrum 128 Troubleshooting Guide	Sinclair ZX Spectrum 128 Capacitor Replacement Guide	—
Sinclair ZX Spectrum +2	Sinclair ZX Spectrum +2 General Maintenance	Sinclair ZX Spectrum +2 Troubleshooting Guide	Sinclair ZX Spectrum +2 Capacitor Replacement Guide	Sinclair ZX Spectrum +2 Floppy Drive Maintenance
Sinclair ZX Spectrum +3	Sinclair ZX Spectrum +3 General Maintenance	Sinclair ZX Spectrum +3 Troubleshooting Guide	Sinclair ZX Spectrum +3 Capacitor Replacement Guide	Sinclair ZX Spectrum +3 Floppy Drive Maintenance

🖥️ Sinclair QL

Model	Maintenance	Troubleshooting	Capacitor Guide	Other Maintenance
Sinclair QL	Sinclair QL General Maintenance	Sinclair QL Troubleshooting Guide	Sinclair QL Capacitor Replacement Guide	Sinclair QL Microdrive Troubleshooting Guide

🔧 Other Sinclair Models

Model	Maintenance	Troubleshooting
ZX Interface 1/2	ZX Interface Maintenance	ZX Interface Troubleshooting

🧪 Tools & Procedures

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.

📦 Related Resources

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.
Sinclair QL Microdrive Troubleshooting Guide – Sinclair QL Microdrive troubleshooting.

🔍 See Also

Pages in category "Sinclair Computers"

The following 31 pages are in this category, out of 31 total.

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Media in category "Sinclair Computers"

The following 24 files are in this category, out of 24 total.

Sinclair QL 68008 processor.jpg 1,024 × 768; 404 KB
Sinclair QL block diagram.png 2,800 × 1,800; 580 KB
Sinclair QL board detail.jpg 1,021 × 537; 265 KB
Sinclair QL circuit diagram (Issue 5).png 7,028 × 5,115; 556 KB
Sinclair QL circuit diagram (Issue 6).png 7,029 × 5,090; 532 KB
Sinclair QL Microdrive cartridge.jpg 1,242 × 828; 59 KB
Sinclair QL Microdrives.jpg 506 × 346; 80 KB
Sinclair QL motherboard.jpg 2,600 × 1,058; 508 KB
Sinclair QL PCB component layout (Issue 5).png 4,600 × 3,373; 128 KB
Sinclair QL PCB component layout (Issue 6).png 4,600 × 3,365; 119 KB
Sinclair QL power supply pinout.png 980 × 600; 62 KB
Sinclair QL rear ports.jpg 2,825 × 396; 242 KB
Sinclair QL Service Manual.pdf 0 × 0; 1.18 MB
Sinclair QL.jpg 3,231 × 1,014; 1.13 MB
Sinclair ZX Spectrum 128 circuit diagram (sheet 1).png 2,137 × 3,000; 1.2 MB
Sinclair ZX Spectrum 128 circuit diagram (sheet 2).png 2,124 × 3,000; 1.14 MB
Sinclair ZX Spectrum 128 circuit diagram (sheet 3).png 2,133 × 3,000; 1.06 MB
Sinclair ZX Spectrum 128.jpg 2,211 × 1,418; 446 KB
Sinclair ZX Spectrum 48K circuit diagram.png 3,400 × 2,479; 829 KB
Sinclair ZX Spectrum Plus 2 front.jpg 1,846 × 708; 289 KB
Sinclair ZX Spectrum Plus 2.jpg 2,600 × 1,422; 341 KB
Sinclair ZX Spectrum Plus main board Issue 6A.jpg 2,576 × 1,932; 1.39 MB
Sinclair ZX Spectrum Plus rear.jpg 2,600 × 623; 234 KB
Sinclair ZX Spectrum Plus.jpg 2,600 × 1,457; 687 KB