Page 7-3
Overall Video/Color Signal Path
The simplified diagram in Figure 7-1 shows the main
ICs in the signal path. Discrete component buffers,
amplifiers, etc. are not shown in the diagram.
Main/Sub Signal Selection
IC2K01 selects the source for both the main and sub
pictures. The choices include:
• the Tuners
• any of the External Video/S-YC inputs.
The DVD Inputs can only be selected as the main
picture source. When selected, IC2K01 selects the
DVD Y signal for the Main-Y signal. The DVD UV
color signals are routed through IC2Y01 to the VCJ.
Main Signal Path--Normal Viewing
When the main picture source is composite video,
from the Tuner or one of the External Video inputs,
it is directed to IC2001, a 3DYC Comb Filter. The
signal is separated into its’ Y and C components.
The Y and C signals are directed back to IC2K01
and output at the Main-Y (M-Y) and Main-C (M-C)
outputs of the IC.
The Main-C signal is routed through delay circuitry
on the PCB-APERTURE and then applied to the
Main-C input on the VCJ (IC2V00).
The Main-Y signal is directed through IC60Y1, pro-
cessed by the Aperture Improvement circuitry and
then applied to the Main-Y input on the VCJ.
The VCJ processes both signals and combines them
to generate RGB video signals. The RGB signals
are directed through the White Balance circuitry and
then to the PCB-CRTs.
Signal Path--Side by Side Mode (VZ7+ Models)
The Main Y and C signals are applied to an NTSC
Decoder in IC6C01. In the IC, the signals are pro-
cessed to form Y, U, and V signals. The main pic-
ture YUV signals are directed to the PIP/POP cir-
cuitry in IC6P01.
The sub picture video signal from IC2K01 is applied
to an NTSC Decoder in IC6C02. The sub picture
YUV output signals are also applied to IC6P01.
In IC6P01, the main and sub picture signals are pro-
cessed and combined to form the Y, U and V signals
for the Side by Side picture. The Y signal is directed
through IC60Y1 and Aperture circuit to the Main-Y
input of the VCJ.
The U and V signals are routed through IC2Y01 to
pins 10 and 8 of the VCJ, respectively.
In the VCJ, the YUV signals are processed to form
RGB video. The RGB signals follow the conven-
tional signal path to the CRTs.
Signal Path--PIP Insert Modes
In the PIP insert modes, the main picture signal path
is the same as during normal viewing. The sub pic-
ture signal path is the same as in the Side by Side
mode, only with one exception, the Sub-Y signal path.
Pin 7 of the VCJ serves as the sub signal Y input.
The sub picture U and V signals are applied to pins
10 and 8 of the VCJ.
In the VCJ the sub YUV signals are inserted in the
main YUV signals. Then the combined signals are
converted to RGB signals and output from the IC.
Signal Path--DVD Component Inputs
When the DVD Component inputs are the selected
main picture source, they are applied to the same
inputs on the VCJ that are used in the Side by Side
mode. The DVD Y signal is output from IC2K01
and directed to the Main-Y input of the VCJ (pin
63). The DVD U and V signals are selected by
IC2Y01 and applied to pins 10 and 8 of the VCJ.
On Screen Display
The On Screen Display (OSD) signals, from the
Control and Convergence circuitry are applied to the
VCJ at pins 14, 15 and 16. In the VCJ, the OSD
RGB signals are inserted in the main picture RGB
signals.
Summary of Contents for VS-45605
Page 11: ...Page 1 8 ...
Page 25: ...Page 3 10 ...
Page 27: ...Page 4 2 ...
Page 31: ...Page 4 6 ...
Page 33: ...Page 4 8 ...
Page 55: ...Page 8 8 ...
Page 57: ...Page 7 2 ...
Page 69: ...Page 9 2 ...