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| Pin | Signal | Level | Impedance |
|---|---|---|---|
| 1 | Audio Out Right | 0.5 V rms | <1k ohm |
| 2 | Audio In Right | 0.5 V rms | >10k ohm |
| 3 | Audio Out Left + Mono | 0.5 V rms | <1k ohm |
| 4 | Ground Audio | ||
| 5 | RGB Ground Blue | ||
| 6 | Audio In Left + Mono | 0.5 V rms | >10k ohm |
| 7 | RGB Blue In | 0.7 V | 75 ohm |
| 8 | Audio/RGB switch / 16:9 | ||
| 9 | RGB Ground Green | ||
| 10 | Comms Data 2 | ||
| 11 | RGB Green In | 0.7 V | 75 ohm |
| 12 | Comms Data 1 | ||
| 13 | RGB Ground Red | ||
| 14 | Ground Data | ||
| 15 | RGB Red In / Chrominance | 0.7 V (Chrom.: 0.3 V burst) | 75 ohm |
| 16 | Blanking Signal | 1-3 V=RGB, 0-0.4 V=Composite | 75 ohm |
| 17 | Ground Composite Video | ||
| 18 | Ground Blanking Signal | ||
| 19 | Composite Video Out | 1 V | 75 ohm |
| 20 | Composite Video In / Luminance | 1 V | 75 ohm |
| 21 | Ground/Shield (Chassis) |
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