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Sega Master System II

Power Connector

Plug Type Coaxial / Barrel Connector
Size 5.5mm Outer Diameter / 2.1mm Inner Diameter
Voltage 9V DC
Amperage 500mA
Polarity Center Negative

Output Audio/Video Connector

The Sega Master System 2 only has a single coaxial RF audio/video output unless it's a French model.

RGB Encoder

Sony CXA1145P Pinout

Video Display Processor

Sega 315-5246 Pinout

Controller Port Pinout

Pin Function
1 Up
2 Down
3 Left
4 Right
5 No Connection
6 Button 1
7 Light Sensor
8 Ground
9 Button 2

Audio Video Schematics

IC BD M4jr PAL 171-5922A