The Lektropacks AV Guide
 
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Scart Connector Pinout - Table 1
Table 1 was the original and allows for composite video input/output, RGB inputs and stereo audio. Table 2 was added to take S-video (S-VHS and Hi-8) inputs. This made pin 15 chrominance and pin 20 luminance.

Many TV sets have 2 SCART sockets. One is usually like table 1 and the other like table 2, and pin 20 switchable from composite to S-Video luminance. The first can switch from a composite input to RGB input. The second can switch from a composite input to an S-Video input, pin 20 being either composite in or luminance in. Usually the second socket outputs a selectable composite signal on pin 19.

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 High (9.5-12V) AVmode
Low (0-2V) TVmode 		<10kohm
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 High (1-3V) RGB
Low (0-0.4V) Composite 		75 ohm
17 Ground Composite Video  -  -
18 Ground Blanking Signal  -  -
19 Composite Video Out 1V including sync 75 ohm
20 Composite Video In 1V including sync 75 ohm
21 Ground/Shield (Chassis)  -  -

Scart Connector Pintout - Table 2
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 - - -
8 Function Select High (9.5-12V) AVmode
Low (0-2V) TVmode 		<10kohm
9 RGB Ground Green  -  -
10 Comms Data 2  -  -
11 - - -
12 Comms Data 1  -  -
13 Ground (chrominance)  -  -
14 Ground Data  -  -
15 Chrominance input 0.3V 75 ohm
16 - - -
17 Ground (luminance)  -  -
18 - - -
19 Video output (composite) 1V including sync 75 ohm
20 Luminance input 1V including sync 75 ohm
21 Ground/Shield (Chassis)  -  -

Cable between VCR and TV (Scart)
TV VCR
Audio Right Out 1 2 Audio Right In
Audio Right In 2 1 Audio Right Out
Audio Left Out 3 6 Audio Left In
Audio Left In 6 3 Audio Left Out
Audio Ground 4 4 Audio Ground
Red 15 15 Red
Red Ground 13 13 Red Ground
Green 11 11 Green
Green Ground 9 9 Green Ground
Blue 7 7 Blue
Blue Ground 5 5 Blue Ground
Status / 16:9 8 8 Status / 16:9
Reserved 10 10 Reserved
Reserved 12 12 Reserved
Fast Blanking Ground 14 14 Fast Blanking Ground
Fast Blanking 16 16 Fast Blanking
Video Out Ground 17 18 Video In Ground
Video In Ground 18 17 Video Out Ground
Video Out 19 20 Video In
Video In 20 19 Video Out
Ground 21 21 Ground

S-Video Cable for Scart S-Video Input
S-Video Out TV Scart (Input)
Luminance Out (Y) 20 Luminance In
Chrominance Out (C) 15 Chrominance In
GND 4+17 GND
Audio Out L 2 Audio In L
Audio Out R 6 Audio In R