File:ZX Spectrum Schematic.png

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Original file (3,704 × 2,648 pixels, file size: 898 KB, MIME type: image/png)

Summary

Sinclair's circuit diagram of the ZX Spectrum Issue 2 main board, titled "ZX Spectrum - Issue 2". It shows the ULA (IC1), Z80 (IC2), ROM (IC5), the 4116 RAM bank, the LM1889 colour encoder with trimmers TC1 and TC2 and presets VR1 and VR2, the dashed "optional 32K RAM" block, the edge-connector table and two "mandatory modification" notes. 3704 × 2648 pixels. Not used on any page.

Source

PNG copy, at the same pixel size, of "ZX Spectrum Issue 2 - Schaltbild.gif" in the Sinclair ZX Computers Archive, https://k1.spdns.de/Vintage/Sinclair/82/Sinclair%20ZX%20Spectrum/Circuit%20Diagrams/ (checked 2026-10-01).

Author

Sinclair Research Ltd

Licence

Copyright Sinclair Research Ltd. Not freely licensed. Hosted for preservation and repair reference.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:22, 2 May 2025		3,704 × 2,648 (898 KB)	Josh (talk \| contribs)

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File change date and time	13:22, 2 May 2025