File:Sinclair ZX Spectrum Issue 1 colour presets and trimmers.jpg
Summary
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Crop of a photograph of a Sinclair ZX Spectrum Issue 1 main board (ULA 5C112E) showing the colour circuit: the LM1889N colour encoder (IC14), the 4.433619 MHz and 14.000 MHz ITC crystals, two trimmer capacitors beside the crystals, two 2.2 kΩ skeleton presets below them, and the 5-way keyboard connector at the top. Cropped for Sinclair ZX Spectrum Colour Adjustment.
Source
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Cropped from File:Sinclair ZX Spectrum Issue 1 Motherboard.jpg on Wikimedia Commons (retrieved 2026-10-25), originally published on Flickr by AUIC Oficial on 29 April 2018 (RetroMadrid 2018).
Author
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AUIC Oficial, photograph by Fernando Sáenz
Licence
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Public domain: marked by the author with the Public Domain Mark on Flickr and recorded on Commons as Template:PD-author-FlickrPDM.
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:59, 25 October 2026 | | 1,500 × 1,040 (326 KB) | Josh (talk | contribs) | Image for the Spectrum colour adjustment guide |
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