Pioneer PDP-503CMX Product Training Manual page 24

Video Card (PDA-5002)
Input 3 : YC using a "S" connector and audio RCA X 2.
Input 4 : Composite in and out using (BNC) connectors
and audio RCA X 2.
Input 5 : DVI-D (Digital Visual Interface-Digital Host Only)
Audio can be connected to the main stereo mini
Jack for inputs 1 and 2.
Slot detect signal when inserted Is sent to the main CPU
Located on the RGB board. This allows inputs 3, 4 and 5
To be used as well as enabling High Definition signals
From inputs 1 or 2.
Signals from the DVI connector are sent through a TMDS
Receiver (Time Minimized Differential Signaling) and on
To the RGB board as 8 bit 2 phase digital RGB.
24