Hitachi 51F510, Manual

Page: 59 / 152

DP-4X MAIN and SUB SYNC CIRCUIT DIAGRAM EXPLANATION
PAGE 03-13
(Continued from page 12)
I501 SUB Y Pr/Pb Selector Sync Inputs and Outputs:
Any signal that have been selected for the Sub Picture, is selected by this IC via I
2
C communications to the Mi-
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
HDMI.
I501 Inputs:
This IC Receives the following 4 types of Inputs;
1. 1H NTSC: The outputs from IV12 are received by I501 . They will be either the Sub 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
IV12 are received by I501 on the following pins; Y pin 66 , Cb pin 68 and Cr pin
70
.
2. Component 1 or 2, HDMI 1 Inputs: I501 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. (Not in the DP-43 Chassis),
I501 Sub H and V Sync Outputs
;
Dependant upon the Customer’s selection for the Sub Picture, I501 outputs the sync signals on the fol-
lowing pins; H Sync pin 19 and V Sync pin 17 . These are input to I503 .
SUB SYNC IN AND OUT OF I503 SYNC INVERTER:
The H and V Sync arriving at pins 13 and 11 of I503 are routed through inverters. H. Sync is inverted
once to match the requirements of the Flex Converter/PinP Module.
V. Sync is inverted twice.
The H Sync is output pin
12 . The V Sync is output pin 8 .
SUB PICTURE SYNC INTO THE FLEX CONVERTER/PinP MODULE UY01:
H Sync is input to pin 15 of the PFC1 connector and into the Flex Converter/PinP Module.
V Sync is input to pin 14 of the PFC1 connector and into the Flex Converter/PinP Module.
SUB PICTURE FROM THE FLEX CONVERTER UY01 TO THE RAINFOREST IC IY04
The Sub Picture (if selected) is then added to the Main picture Y Pr/Pb signals inside the Flex Con-
verter/PinP Module and output along with the Main Pictures signal paths.