SNES:Video Output Notes

All original NTSC SNESes and Super Famicoms output TTL sync from pin 3 on the multi-out connector. SNS-101 and Super Famicom Jr. consoles can get TTL sync by connecting pin 18 on the S-RGB chip to pin 3 on the multi-out or by installing a bypass mod.

PAL SNESes have 12V on pin 3 of the multi-out, which is used for SCART autoswitching. If you connect a CSYNC cable to a PAL SNES, you can damage your equipment! Instead, you can use a cable that gets sync from luma (pin 7) or composite video (pin 9) on the multi-out connector (luma recommended).

RGB Cable Components

NTSC

All RGB cables that use CSYNC should have a 330-450 ohm resistor on the CSYNC line. The red, green and blue signals each require an in-line 220 uF capacitor in order to reduce DC offset.

PAL

Instead of in-line 220 uF capacitors, RGB cables for PAL SNESes use a 75 ohm pull-down resistor for each signal (red, green and blue). As mentioned in the earlier section, PAL consoles do not output composite sync, so either composite video or luma must be used for sync.