Mitsubishi V19-V21, Техническое руководство

Страница: 47 / 71

7-5
• The Y signal is applied to the NTSC SW,
IC2Y01.
The NTSC SW selects the S-Y signal, or the Y sig-
nal from IC2C00. The selected Y signal is applied
to the Main Decoder.
The Main Decoder converts the Y and C signal to
YCbCr and directs them to Main YCbCr Select cir-
cuitry on the PCB-SIGNAL.
Note that Y signal at the input to the Main Decoder
is also directed to the DM Module and the Monitor
Outputs.
YCbCr Select Circuitry
Figure 7-4 shows the Main Picture YCbCr Select
Circuitry. Compared to that in the V17 and V18,
the circuitry has been simplified. The DVD Select
IC, IC2A60, selects either COMP-1 or COMP-2 sig-
nal.
IC2A00 is a new IC (Generic #CXA2151Q). It se-
lects the main picture YCbCr signals from:
• The output of IC2A60
• The output of the Main Decoder
• The DTV Inputs
• The VGA Input
The path of the selected signals from IC2A00 de-
pends on the signals format:
• 480i and 480p YCbCr signals are directed to
2HDW, and CbCr to the DM Module
circuitry. Y signal for the DM comes di-
rectly from PCB-3DYC.
• 480p and 1080i YCbCr signals are directed
to the Bypass Inputs on the VCJ.
The selected output from IC2A00 is always in the
component format (YCbCr). If the selected signals
are RGB, from the DTV or VGA inputs, they are
converted to YCbCr in IC2A00.