Sony KDS-55A2000 Operating Instructions Manual page 35

Colour System
Game Mode
Colour Matrix
Selects the colour system ("Auto", "PAL", "SECAM", "NTSC3.58" or
"NTSC4.43") according to the input signal from the input source.
Depending on the game software, reaction times may slow during fast-moving
scenes, etc. Select "On" to improve the reaction times.
Usually used in the factory setting (AV1/2/3/7 (Composite and S video input signal)
is set to "ITU601", and AV4/5/6/7 (Component input signal) is set to "Auto"). If the
tone of the picture from the input source is unnatural, select either "ITU601" or
"ITU709", which normalizes the tone.
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