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DP-4X MAIN and SUB SYNC CIRCUIT DIAGRAM EXPLANATION
(See Main/Sub Sync Circuit Diagram for details)
This diagram shows the route for sync to the RGB Processor (Rainforest IC) IY04.
I502 Main Y Pr/Pb Selector Sync Inputs and Outputs:
Any signal that have been selected for the Main Picture, is selected by this IC via I
croprocessor SDA2 pin 3 and SCL2 pin 4.
It selects the following; 1H NTSC, Component Inputs, ATSC Tuner (Not in the DP-43 Chassis) and the
HDMI inputs.
I502 Inputs: This IC Receives the following 3 types of Inputs;
1.
1H NTSC: The outputs from IV08 are received by I502. They will be either the Main Tuner, Com-
posite Video 2, 3, 4 or 5, S-In 3, 4 or 5, Component NTSC Y Pr/Pb. Any of these inputs that have
been selected by IV08 are received by I502 on the following pins; Y pin 66, Cb pin 68 and Cr pin
70.
2.
Component 1 or 2, HDMI 1 Inputs: I502 receives the Component 1 or 2 and/or HDMI 1 inputs at
the following pins, Y pin 78, Pb pin 80 and Pr pin 2.
3.
ATSC (Digital Tuner) Inputs: I502 receives the Digital Tuner (1080i) inputs at the following
pins, Y pin 72, Pb pin 74 and Pr pin 76. (Not in the DP-43 Chassis),
I502 Main H and V Sync Outputs;
Dependant upon the Customer's selection for the Main Picture, I502 outputs the sync signals on the fol-
lowing pins; H Sync pin 19 and V Sync pin 17. These are input to I503.
MAIN PICTURE SYNC IN AND OUT OF I503 SYNC INVERTER:
The H and V Sync arriving at pins 1 and 3 of I503 are routed through inverters. H. Sync is inverted once
to match the requirements of the Flex Converter. V. Sync is inverted twice.
The H Sync is output pin 2. The V Sync is output pin 6.
MAIN PICTURE SYNC INTO THE FLEX CONVERTER/PinP MODULE UY01:
H Sync is input to pin 8 of the PFC1 connector and into the Flex Converter/PinP Module.
V Sync is input to pin 7 of the PFC1 connector and into the Flex Converter/PinP Module.
MAIN PICTURE SYNC FROM THE FLEX CONVERTER UY01 TO THE RAINFOREST IC IY04
H Sync output from pin 7 of connector PFC2 to pin 12 of the Sync Selector IY05.
H Sync for a true 1080i signal is input to pin 13 of the Sync Selector IY05.
Dependant upon the Main Picture Selected, IY05 outputs the appropriate H. Sync from pin 14 to the
Rainforest IC pin 50. IY05 Sync Selection is determined by the output from the Rainforest IY04 pin 34
to pin 11. High outputs true 1080i H. Sync and Low outputs Flex Converter upconverted (1080i) 540 if
progressive.
Note: True 1080i bypasses the Flex converter.
V Sync is output from pin 6 of connector PFC2 to pin 52 of the of the Rainforest IC IY04.
Since Sync is the same for all signals, (60Hz) there is no need to route through a sync selector like
Horizontal Sync.
2
C communications to the Mi-
(Continued on page 13)
PAGE 03-12
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