Panasonic TH-42PX20U Service Update Information page 14

interlace to progressive scan conversion. The Global core IC also converts the
horizontal frequency of all NTSC inputs to 31.468KHz. The output of the GC2M
IC is RGB; it is applied to an external RGB amplifier.
IC001 is the TV Main CPU. It generates the On Screen Display (OSD) RGB
signals, which also enters the RGB amplifier stage. A switching circuit combines
the two sets of RGB signals for display on the screen. All NTSC, Component,
and RGB picture adjustments such as picture, tint, color, brightness, etc. are
performed inside this IC.
The RGB/PC select circuit switches between PC and all other inputs. The output
of the switch is routed to the D Board.
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