 21 pin SCART female connector at the video/TV | The Scart (Syndicat des Constructeurs d"Appareils Radiorecepteurs et Televiseurs) connector is used for combined audio and video connections. Different pin-configurations exist. Which confirations are available depends on the video device used. Sometimes one can choose the configuration (like composite or S-video) by changing a software setting. Two status signals define (partly) which video signals are active. A video device can use these status signals to automatically switch between internal or external audio/video signals. | Pin | Name | Description | Signal Level | Impedance |
|---|
| 1 | AOR | Audio Out Right | 0.5 V rms | <1k ohm |
| 2 | AIR | Audio In Right | 0.5 V rms | >10k ohm |
| 3 | AOL | Audio Out Left + Mono | 0.5 V rms | <1k ohm |
| 4 | AGND | Audio Ground | | |
| 5 | B GND | RGB Blue Ground | | |
| 6 | AIL | Audio In Left + Mono | 0.5 V rms | >10k ohm |
| 7 | B | RGB Blue In | 0.7 V | 75 ohm |
| 8 | SWTCH | Audio/RGB switch / 16:9, slow switch (10-12v), to force tv to switch on a mode (depends of the tv(old), sometimes set tv to AUX) | | |
| 9 | G GND | RGB Green Ground | | |
| 10 | CLKOUT | Data 2: Clockpulse Out, used in the 80"s by old videotapes | | |
| 11 | G | RGB Green In | 0.7 V | 75 ohm |
| 12 | DATA | Data 1: Data Out (Unavailable ??) | | |
| 13 | R GND | RGB Red Ground | | |
| 14 | DATAGND | Data Ground, remote control, wired and used by old videotape recorders | | |
| 15 | R | RGB Red In / Chrominance | 0.7 V (Chrom.: 0.3 V burst) | 75 ohm |
| 16 | BLNK | Blanking Signal, fast switch (1-3v), to force tv to switch on a mode (depends of the tv(recent), sometimes set tv to AUX) | 1-3 V=RGB, 0-0.4 V=Composite | 75 ohm |
| 17 | VGND | Composite Video Ground | | |
| 18 | BLNKGND | Blanking Signal Ground - ground for slow or fast switch (ground for pin 8 or 16) | | |
| 19 | VOUT | Composite Video Out | 1 V | 75 ohm |
| 20 | VIN | Composite Video In / Luminance | 1 V | 75 ohm |
| 21 | SHIELD | Ground/Shield (Chassis) | | |
Many TV sets have 2 SCART sockets. One is usually uses previous pinout table and the other uses following pinout table. 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 | - | - | - |
| 8 | Fuction 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) | | |
Signal Levels| Signal | AC level | DC level | Impedance |
|---|
| Red, green, blue | Peak to blanking: 0...0.7 V ±3 dB | 0...2 V | 75 Ohm |
| Sync | Peak to peak: 0...0.3 V -3 dB...+10 dB | 0...2 V | 75 Ohm |
| Composite video | White to sync: 0...1.0 V ±3 dB | 0...2 V | 75 Ohm |
| Chrominance | 0...0.3 V -3 dB...+10 dB | 0...2 V | 75 Ohm |
| Luminance | 0...1.0 V ±3 dB | 0...2 V | 75 Ohm |
| MAC | Black to white: 0...1.0 V ±3 dB | 0...2 V | 75 Ohm |
| Audio in | 0.2...2.0 V (nominal: 0.5 V) | | >=10 kOhm |
| Audio out | Nominal: 0.5 V (maximum: 2.0 V) | | <=1 kOhm |
| Video status | Low data rate communication: 0.0...2.0 V
(e.g. remote control; Easylink) | Internal: 0.0...2.0 V
External (16:9): 4.5...7.0 V
External (4:3): 9.5...12.0 V | In: ZR>=10 kOhm
ZC<=2 nF
Out: ZR<=1 kOhm |
| RGB status | | Internal: 0.0...0.4 V
External: 1.0...3.0 V | 75 Ohm |
A formal interface description is given in the CENELEC EN 50 049-1:1989 standard or in the IEC 933-1 standard. Some tables: SCART S-Video Connection| Output connector | Input connector |
|---|
| 1 | Audio right out | 2 | Audio right in |
| 3 | Audio left (or mono) out | 6 | Audio left (or mono) in |
| 4 | Audio return | 4 | Audio return |
| 15 | Chrominance out | 15 | Chrominance in |
| 13 | Chrominance return | 13 | Chrominance return |
| 8 | Video status out | 8 | Video status in |
| 19 | Luminance out | 20 | Luminance in |
| 17 | Luminance return | 18 | Luminance return |
| 21 | Shield | 21 | Shield |
SCART Composite Video Connection| Output connector | Input connector |
|---|
| 1 | Audio right out | 2 | Audio right in |
| 3 | Audio left (or mono) out | 6 | Audio left (or mono) in |
| 4 | Audio return | 4 | Audio return |
| 8 | Video status out | 8 | Video status in |
| 19 | Composite video out | 20 | Composite video in |
| 17 | Composite video return | 18 | Composite video return |
| 21 | Shield | 21 | Shield |
SCART (Composite) Decoder Connection| Receiver connector | Decoder connector |
|---|
| 1 | Audio right out | 2 | Audio right in |
| 2 | Audio right in | 1 | Audio right out |
| 3 | Audio left out | 6 | Audio left in |
| 6 | Audio left in | 3 | Audio left out |
| 4 | Audio return | 4 | Audio return |
| 8 | Video status in | 8 | Video status out |
| 19 | Baseband out (scrambled) | 20 | Baseband in |
| 17 | Baseband out return | 18 | Baseband in return |
| 20 | Composite video in (unscrambled) | 19 | Composite video out |
| 18 | Composite video in return | 17 | Composite video out return |
| 21 | Shield | 21 | Shield |
SCART EasyLink Connection (additional)| Television connector | Video recorder connector |
|---|
| 10 | I/O Control Bus | 10 | I/O Control Bus |
EasyLink enables bi-directional communication between a television set and a video recorder. This way a video recorder can, for example, copy the channel settings of the television set. Who knows the details? |  21 pin SCART male connector at the cable |
