File:Ferranti Archives TV-FER-SCH-158 Sinclair TV test box measurement board, top-view layout.pdf
Summary
[edit | edit source]Ink component-placement drawing headed "Top view" of the measurement board of the Sinclair TV test box, Ferranti's tester for its ZN401 chip. Dashed lines divide the board into areas, with pencil labels naming the test each area serves. The test 8 area holds a 74122 monostable and a ZTX500 transistor (the EHT pulse detector); the test 2 area an AD536 RMS-to-DC converter for the sound level and ZN424 comparators marked HF2, HF4 and HF5; the test 3 area a 7430 gate and four ZN424 comparators numbered 3 to 6, with points for device pins 14 and 9 and the supply flag HF6'; the test 5 area comparator 7, a 7400 and an LM324; and an AGC area comparators 8 and 9 with a point for pin 17. A 16-pin socket at the right carries the HF flag outputs. A pin map of another 16-pin socket lists set-up voltages (1.5 V for test 5; 1.5 V and 2.5 V for AGC; 3.52, 2.88, 3.3 and 2.7 V; "Vref to 0.2" and "Vref to 0.5"), which match the comparator thresholds on TV-FER-SCH-163 and TV-FER-SCH-164. The drawing is undated. The catalogue calls it a top view of the test box; it is the layout of this one board. Part of the Ferranti Archives 2026.
Archive record
[edit | edit source]| Catalogue ID | TV-FER-SCH-158 |
|---|---|
| Date | Undated |
| Origin | Ferranti |
| Document type | Drawing |
| Device or subject | Pocket TV Test Box |
| Catalogue description | A top view drawing of the Sinclair TV Test Box |
| Original file name | {{{filename|}}}
|
| Found in | TV-FER-FOL-168 |
| Pages | 1 |
Source
[edit | edit source]Ferranti Archives 2026, original scan on Google Drive.
Author
[edit | edit source]Ferranti Electronics Limited
Licence
[edit | edit source]Ferranti Archives 2026: source and terms of use
This scan is part of the Ferranti Archives 2026, a collection of Sinclair-related documents from Ferranti's files, catalogued in 2026 and released through the Happy Little Diodes YouTube channel (video, catalogue). The archive presents the documents for preserving and archiving material of historical interest, and for non-commercial, educational and archival research. Its terms state that consent is strictly limited to non-commercial use, and that any commercial exploitation of the documents or their contents, including use in connection with the manufacture, marketing or sale of goods, is strictly prohibited by Sky UK Limited.
Copyright remains with the rights holders. The file is not freely licensed and is hosted here for preservation and repair reference only, under the archive's terms. Personal information was redacted by the archive before release; if you find any that remains, please tell [email protected].
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 10:40, 18 October 2026 | 0 × 0 (926 KB) | Josh (talk | contribs) | Ferranti Archives 2026: TV-FER-SCH-158 |
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