File:Sinclair QL video output circuit (Issue 5).png
Summary
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The video output section of the Sinclair QL Issue 5 main board circuit diagram: the eight pins of the monitor socket J7 at the top, the MC1377P PAL encoder IC28 with its input resistors R48 to R53, the monochrome mixer TR9 with R56 to R59, R87 and R88, the UHF modulator M1, and the BLUE, GREEN, RED, CSYNCL and VSYNCH outputs of the ZX8301 (IC22, pins 32, 31, 30, 12 and 11) running to J7 and to the expansion connector J1. The J7 pin numbers printed here are the mirror image of the numbering in the QL User Guide and the Service Manual's Appendix A. Cropped from Figure 1.4 of Sinclair's QL Service Manual (issue 3, October 1985), page 1.17 (PDF page 19) of the hosted copy File:Sinclair QL Service Manual.pdf. Used on Sinclair QL RGB Port Repair.
Source
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Cropped for this wiki from File:Sinclair QL circuit diagram (Issue 5).png, the wiki's copy of Figure 1.4; no other change.
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Author
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Sinclair Research Ltd
Licence
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Copyright Sinclair Research Ltd. Not freely licensed. Hosted for preservation and repair reference, with the source cited.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:42, 25 October 2026 | | 1,616 × 2,200 (399 KB) | Josh (talk | contribs) | Crop for Sinclair QL RGB Port Repair |
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