Pin 15 of the VIC IC is the sync/luminance output. Pin 14 is the color output. A composite video output
is created by mixing sync/luminance and color. The composite output is applied to the RF modulator,
and also passed to the monitor connector CN5 on pin 4. The color output is not made available on
the monitor connector CN5 as on the 8 pin version, and the RF modulator mixes audio with the composite
video producing the TV RF output, unlike the 8 pin version RF modulator which creates the
composite video output.