Rgb Block - Pioneer PDP-503CMX Product Training Manual

RGB Block Signal Flow
Inputs 1 or 2 from the I/O assy if RGB go directly to IC4603 (RGB A/D converter), if the signals are
component they enter IC4402 and then converted to RGB and sent to IC4603. After A/D
conversion takes place from IC4603 the now Digital 8-bit RGB is sent onto IC5001 & IC5102 the
interlace to progressive and selector IC's. After I/P conversion the signals are sent out from
IC5001 as 2 channel 8-bit RGB through a selector switch and onto IC5301 the Digital Video
Processor IC. IC5301 contains the video correction circuitry needed to process the RGB signal.
Brightness, contrast, white balance, video enhance, screen size and on-screen display are all
controlled by IC5301. The output from the Video Process IC is 10-bit 2 channel RBG and exits
this assembly and enters the Digital Video Board.
Inputs 3 or 4 from the video card after conversion to Y/CB/CR (inside the video card) follow the
exact same path as the component flow for inputs 1 or 2.
The DVI input (input 5) from the video card is already 8-bit 2 channel digital RGB and bypasses
the RGB decode, A/D converter and I/P converter. The DVI signals directly enter the Digital Video
processor (IC5301).
Sync paths for all inputs enter IC4803 (sync processor) through various inputs. After sync
separation is preformed and analog to digital converting the sync outputs (for inputs 1, 2, 3 or 4)
is sent to the I/P select chip IC5001. The output from the I/P select chip is sent to a selector
switch. This switch will allow the RBG & sync or the DVI & sync to be sent onto the Digital Video
Process IC.
Sync signals are also sent to the system control IC (IC5505) to determine input signal frequency.
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