Hitachi 46W500 Training page 40

DP-3X CHASSIS COMPONENT EXPLANATION
See the DP-3X Chassis Component Video Signal Path for details.
Also see Video Signal Path (NTSC) Circuit Diagram for details about NTSC
It's important to note that this Chassis horizontal deflection operates at 33.75Khz at all times. Even though this is
more than twice as fast as NTSC, the set will still display NTSC video with no problem. This is accomplished by
the Flex Converter. The Flex Converter will manipulate any input, be it NTSC, Component 480i, 480P, 720P to
the appropriate Horizontal Frequency rate of 33.75Khz. This makes this chassis very versatile in it's application.
1080i is already 540 so it's routed directly into the Rainforest IC I501.
The following will discuss the Component signal path and the continuation of the NTSC signal path.
This chassis utilizes 6 separate inputs which also include 2 DVI inputs plus a New Photo Media card reader. The
following will break down those input routes to the Y Pr/Pb Selector IC IV03. DVD Player (not shown)
(1) COMPONENT INPUT 1: This input is only for Component Inputs Y Pr/Pb (31.5Khz to 33.75Khz ATSC)
and Y Cr/Cb (15,735Hz 480i NTSC) but will not accept Composite on the Y input.
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The Y line is input directly into the Y Pr/Pb Selector IV04 pin 9.
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The Pr/Cr line is input directly into the Y Pr/Pb Selector IV04 pin 1.
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The Pb/Cb line is input directly into the Y Pr/Pb Selector IX02 pin 14.
(2) COMPONENT INPUT 2: This input will accept Component Inputs Y Pr/ Pb (31.5Khz to 33.75Khz
ATSC) or Y Cr/Cb (15,735Hz. 480i NTSC). This will accept Composite Video on the Y input as long as
there is no Pr plug inserted.
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The Y line is input directly into the Y Pr/Pb Selector IV07 pin 9.
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The Cr/Pr line is input directly into the Y Pr/Pb Selector IV07 pin 1.
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The Cv/Pb line is input directly into the Y Pr/Pb Selector IV07 pin 14.
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Input 2 Composite Video is routed into the Selector IC IV01 pin 30.
(3) DVI 1 INPUT (Digital Video Interface): This input will accept Component Inputs Y Pr/ Pv (31.5Khz to
33.75Khz ATSC) only. (See DVI Signal Path for further details).
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The G line is input from the PET connector pin 14 into the Y Pr/Pb Selector IV04 pin 8.
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The R line is input from the PET connector pin 12 into the Y Pr/Pb Selector IV04 pin 16.
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The B line is input from the PET connector pin 16 into the Y Pr/Pb Selector IV04 pin 11.
(4) DVI 2 INPUT (Digital Video Interface): This input will accept Component Inputs Y Pr/ Pv (31.5Khz to
33.75Khz ATSC) only. (See DVI Signal Path for further details). (Only in the DP37D Chassis).
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The G line is input from the PET connector pin 5 into the Y Pr/Pb Selector IV05 pin 8.
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The R line is input from the PET connector pin 3 into the Y Pr/Pb Selector IV05 pin 16.
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The B line is input from the PET connector pin 7 into the Y Pr/Pb Selector IV05 pin 11.
(5) DIGITAL TUNER (ATSC) UD2002 INPUT: These inputs are provided from the Digital Tuner (ATSC).
The ATSC Tuner outputs DM-Y, DM-Pb and DM-Pr. (Only in the DP36 Chassis).
DM-HY (Luminance) from PMS2 pin 11, through PST1 pin 31 to Y Pr/Pb Selector IV0 pin 15.
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DM-Pb (Blue Chroma) from PMS2 pin 9, through PST1 pin 25 to Y Pr/Pb Selector IV03 pin 17.
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DM-Pr (Red Chroma) from PMS2 pin 7, through PST1 pin 26 to Y Pr/Pb Selector IV03 pin 19.
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NOTE: When receiving a SDTV or HDTV signal, the Digital Module also outputs Composite Video/
Chroma for Monitor Output. (See NTSC Signal Path for specifics).
(6) PHOTO MEDIA CARD READER: DP-37/C/D. (Access on the front). Note: DP-36 Photo Card reader is
fed directly into the Digital Module.
Y (Luminance) from Card Reader, through PTB in 6 to Y Pr/Pb Selector IV03 pin 53.
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Pb (Blue Chroma) from Card Reader, through PTB in 2 to Y Pr/Pb Selector IV03 pin 55.
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Pr (Red Chroma) from Card Reader, through PTB in 4 to Y Pr/Pb Selector IV03 pin 57.
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Picture File names must be 8 characters only, 4 characters Alpha and 4 characters numeric.
MAIN COMPONENT VIDEO PATH from IV03:
The following describes Main Component outputs from the Y Pr/Pb Selector IV03.
Y pin 44, to QV33, to Main Video/Chroma Y Pr/Pb Switch IY04 pin 30 and 6.
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Pr pin 40, to QV35, to Main Video/Chroma Y Pr/Pb Switch IY04 pin 28.
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Pb pin 42, to QV34, to Main Video/Chroma Y Pr/Pb Switch IY04 pin 29.
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(Continued on page 5)
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