Interactive Connector Diagram
Click or tap any pin in the diagram below to inspect its signal assignment, electrical specification, and wire colour standard.
Click any pin to view its signal assignment, electrical spec, and wire colour.
Supported Systems / Found On — Retro Machine Hubs
This connector is used on the following retro computer systems. Click any colour-coded badge below to open its full board-level repair, diagnostic, and schematic Machine Hub:
Connector Specifications
Connector Type
9-Pin Circular Mini-DIN Female on console (3 rows: 3 top, 4 middle, 2 bottom)
Video Signals
Analog Red (Pin 7), Green (Pin 3), Blue (Pin 9), TTL CSYNC (Pin 4), Composite CVBS (Pin 2)
Audio Signals
Stereo Left (Pin 8), Stereo Right (Pin 9/6 — Pin 8=Left, Pin 6=Mono, Pin 9=Right/Blue — see table)
Cable Components
75 Ω resistor + 220 µF cap in series on R, G, B; 470 Ω + 220 µF on Pin 4 (CSYNC)
Full Pin Assignment & Wiring Reference
| Pin | Signal Name | Direction | Electrical Spec / Role | Wire Colour / SCART / Adapter Target |
|---|---|---|---|---|
| 1 | ANALOG BLUE (B) | Out | Analog Blue Video Output (requires 75 Ω + 220 µF in SCART plug) | SCART Pin 7 via 75 Ω + 220 µF |
| 2 | COMPOSITE VIDEO (CVBS) | Out | 1.0 Vpp 75 Ω Composite Video Output | Yellow RCA / Composite SCART Pin 20 |
| 3 | ANALOG GREEN (G) | Out | Analog Green Video Output (requires 75 Ω + 220 µF in SCART plug) | SCART Pin 11 via 75 Ω + 220 µF |
| 4 | CSYNC (TTL Sync) | Out | 5.0 Vpp TTL Composite Sync Output | SCART Pin 20 via 470 Ω + 220 µF |
| 5 | +5V DC | Pwr | +5.0 V DC Regulated Output (OMIT on 32X patch cable!) | SCART Pin 16 via 180 Ω resistor |
| 6 | AUDIO MONO | Out | Summed Mono Audio Output (for mono TVs / RF units) | Leave NC for Stereo SCART |
| 7 | ANALOG RED (R) | Out | Analog Red Video Output (requires 75 Ω + 220 µF in SCART plug) | SCART Pin 15 via 75 Ω + 220 µF |
| 8 | AUDIO LEFT (L) | Out | Line-Level Stereo Left Audio Output | White RCA / SCART Pin 6 |
| 9 | AUDIO RIGHT (R) | Out | Line-Level Stereo Right Audio Output (Outer metal shield = GND!) | Red RCA / SCART Pin 2 (Shield = GND) |
Mega Drive 2 / Nomad RGB SCART Wiring & Shield Grounding Note
With the 1993 release of the redesigned Sega Mega Drive II / Genesis Model 2 (MK-1631), Sega replaced the bulky 8-pin horseshoe DIN with a compact 9-pin Mini-DIN connector that finally included both Left and Right stereo audio channels right on the rear A/V port. This same 9-pin Mini-DIN pinout is used on the Sega 32X, Sega CDX / Multi-Mega, Sega Nomad handheld, JVC X'Eye, and Genesis 3.
- Where is Ground on the 9-Pin Mini-DIN? All 9 inner pins carry active signals — 0V Ground is carried exclusively on the outer circular metal shield ring of the Mini-DIN plug! Make sure your cable hood solders a heavy braid wire firmly to the Mini-DIN metal barrel.
- RGB & CSYNC Passive Components: Just like the Model 1, place a 75 Ω resistor and 220 µF capacitor in series on Pin 7 (Red), Pin 3 (Green), and Pin 1 (Blue), plus a 470 Ω resistor and 220 µF capacitor in series on Pin 4 (CSYNC).
- Building a Sega 32X Conversion / Patch Cable: Connect Pins 1, 2, 3, 4, 6, 7, 8, 9 and the outer Shield 1-to-1 between two 9-pin Mini-DIN male plugs, and leave Pin 5 (+5V) completely disconnected!