The Coupé SCART socket to handle all video and sound outputs, note that not all connections are standard as it also has +5V and +12V inputs, TTL level ouput and a lightpen connection, perhaps the voltage lines were added to allow for a single cable to be connected to the Coupé as was shown in some of the marketing material of the time.
|1||AUDIO OUT RH||2||SPEN|
|3||AUDIO OUT LH||4||AUDIO EARTH|
|5||BLUE EARTH||6||BLUE TTL OUT|
|7||BLUE LIN. OUT||8||RED TTL OUT|
|9||GREEN EARTH||10||GREEN TTL OUT|
|11||GREEN LIN. OUT||12||+5V POWER IN|
|13||RED EARTH||14||CSYNC EARTH|
|15||RED LIN. OUT||16||CSYNC|
|17||C VID EARTH||18||+12V POWER IN|
|19||C VID OUT||20||BRIGHT TTL OUT|
When making a cable you will need to add a 470 Ohm resister between pins 16 and 20 on the TV side to prevent saturation of the signal.
|Sam Pin||Signal||Cable||TV Pin||Signal|
|1||AUDIO R/H||——||2||AUDIO INPUT B|
|3||AUDIO L/H||——||6||AUDIO INPUT A|
|4||AUDIO EARTH||——||4||AUDIO EARTH|
|14||CSYNC EARTH||——||14||CSYNC EARTH|
|-/\/\/-||470 OHM RESISTOR (between 16 and 20)|
In recent years with widescreen and now LCD/Plasma televisions it is more important to feed a voltage into the standard SCART pin 16 (blanking), the above pin-out allows this but at the expense of stressing the CSYNC line - an alternative is to use a flylead to pick up the 5V line (not the +5V input line on the SCART which is wired before the internal power switch) from the Lightpen/Audio port and feed it through a suitable resistor to get the required 1-3V to select RGB mode.