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DP-4X RGB PROCESSOR CIRCUIT EXPLANATION
RGB PROCESSOR CIRCUIT EXPLANATION.
(See the RGB Processor Circuit Diagram. for Details)
The RGB Process Circuit Diagram shows the continuation of the Video Signal path from the outputs of I502 and
I501 that were described in the previous explanation, Component Video Signal Path. This discussion will take up
the signal flow from that point.
I502 Main Y Pr/Pb Selector Outputs;
Dependant upon the Customer's selection for the Main Picture, I502 outputs the component signals on the fol-
lowing pins; Y pin 20, Pr pin 16 and Pb pin 18.
•
Y is routed through Q506 and splits into two paths;
1.
If the signal is anything other than HD 1080i, its routed through QY01 to pin 3 of the PFC1 con-
nector on the Flex Converter UY01.
2.
If the signal is HD 1080i, its routed through QY13 to pin 63 of IY04 (The Rainforest IC) RGB
processor.
•
Cr (480i) or Pr (all ATSC formats) is routed through Q505 and splits into two paths;
1.
If the signal is anything other than HD 1080i, its routed through QY03 to pin 4 of the PFC1 con-
nector on the Flex Converter UY01.
2.
If the signal is HD 1080i, its routed through QY16 to pin 61 of IY04 (The Rainforest IC) RGB
processor.
•
Cb (480i) or Pb (all ATSC formats) is routed through Q504 and splits into two paths;
1.
If the signal is anything other than HD 1080i, its routed through QY02 to pin 5 of the PFC1 con-
nector on the Flex Converter UY01.
2.
If the signal is HD 1080i, its routed through QY18 to pin 60 of IY04 (The Rainforest IC) RGB
processor.
The reason that HD 1080i (540) can be routed directly into IY04 Rainforest and bypass the Flex Converter is
because it is already the correct frequency of the deflection circuit. The responsibility of the Flex Converter
is to convert any signal into the usable frequency of the deflection. So anything out of the Flex Converter is
also now 1080i (540).
This can be a very helpful Troubleshooting Aid in that the Flex Converter can be bypassed (if suspected of a
problem) by inputting a 1080i (HD) signal and selecting that source.
I501 Sub Y Pr/Pb Selector Outputs;
Dependant upon the Customer's selection for the Sub Picture, I501 outputs the component signals on the follow-
ing pins; Y pin 20, Pr pin 16 and Pb pin 18.
1.
Y is routed through Q503 to pin 17 of the PFC1 connector on the Flex Converter UY01.
2.
Cr (480i) or Pr (all ATSC formats) is routed through Q502 to pin 18 of the PFC1 connector on the Flex
Converter UY01.
3.
Cb (480i) or Pb (all ATSC formats) is routed through Q501 to pin 19 of the PFC1 connector on the Flex
Converter UY01.
UY01 Flex Converter Outputs;
Any Signal that has been selected other than HD 1080i is output from the Flex Converter on the following pins;
•
Y is output from Pin 16 and routed through QY14 to pin 68 of IY04 connector on the Flex Converter
UY01.
•
Pr is output from Pin 20 and routed through QY10 to pin 66 of IY04 connector on the Flex Converter
UY01.
•
Pb is output from Pin 18 and routed through QY12 to pin 67 of IY04 connector on the Flex Converter
UY01.
(Continued on page 04-08)
PAGE 03-07
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