AV:Hama 42570

A fairly common (after including generic clones) manual, passive, and fully mechanical SCART switch.

It is specific for this use and not compatible with JP-21 signals or as a generic 20P3C electrical switch.

Compatibility

 * Composite video and stereo audio are supported.
 * RGBα (and derivatives sharing the same pins like S-Video and YPbPr) are supported.
 * Pin 8 source active/aspect ratio indication is supported.
 * Consumer electronics control (pin 10 and 12) is unimplemented.
 * Return path is partially supported.

Connectors

 * A is intended for a VTR but is compatible with generic source.
 * B and C are generic inputs.
 * TV/MONITOR is self explanatory.
 * TV OUTPUT is the output from TV/MONITOR (most commonly where implemented, last selected RF channel).
 * OUTPUT offers the same signal sent to TV/MONITOR, ie this device can be used as a SCART to RCA converter.

Controls

 * RGB enables or disables pin 16 passthrough. The actual RGB signals are always connected.
 * B-A or C-A connect the selected input to A's return path.
 * A, B, or C connect the selected input to TV/MONITOR and OUTPUT.