Video Block
GP6DU and GPH6DU Chassis
The GPH6DU, and the GP6DU series plasma panels incorporate two tuners. The
main Digital Tuning System is used for primary picture operation. It provides
component and composite video and audio output signals from its ATSC, NTSC,
and QAM tuners. An additional NTSC sub-tuner provides a video output signal
(no audio) for use with multi-picture functions.
The composite output of the main tuner is connected to the NTSC input switch IC
on the H Board. The component output is connected to the main switch IC on the
H board. The unit also contains three video inputs that are also connected to the
input switch IC. The input switch IC selects one video signal from 5 video inputs
for main picture operation and another for sub-picture operation. Selection is
controlled by the MPU via the I
2
C Bus (SDA & SCL). These two outputs are then
connected to the main switch IC.
The panel also contains two component inputs and an HDMI input. The inputs
are connected to the main switch. The HDMI input connector on the DG Board,
accepts signals to HDMI receiver where it undergoes serial to parallel
conversion. The output of the receiver is then converted to “Y, Pb, Pr” component
signals before being applied to the Main switch. The MPU selects one of the 8
inputs for main picture operation and another for sub-picture operation.
On the DG- Board, the global core IC (GC2M) converts the composite video
signal of the main picture to RGB video signals. The GC2S IC processes the
sub-picture information and combines it with the main picture. It performs
interlace to progressive scan conversion. The Global core IC also converts the
horizontal frequency of all NTSC input-signals to 31.468KHz. The output of the
GC2M IC is RGB, which is applied to an RGB amplifier.
IC001 is the TV Main CPU. It generates the On-Screen Display (OSD) RGB
signals, which are applied to the RGB amplifier stage. A switching circuit
combines the two sets of RGB signals for display on the screen. All NTSC,
Component, and RGB picture adjustments such as picture, tint, color, brightness,
etc. are performed inside this IC.
The RGB/PC select circuit switches between PC and all other inputs. The output
of the switch is routed to the D-Board.
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Содержание GP6DU
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Страница 20: ...14 Figure 7 Video Block Diagram ...
Страница 21: ...15 Figure 8 H Board Block Diagram ...
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Страница 23: ...Figure 9 H Board Block Diagram 17 ...
Страница 24: ...Figure 10 DG Board Block Diagram 18 ...
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Страница 43: ...DG6 DG3 Figure 24 TH 42PX25U Power on operation 37 ...
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Страница 49: ...4 1 Figure 26 TH 65XVS30 Power On operation 43 ...
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Страница 55: ...49 Figure 28 TH 42PD25U PA board SOS detect ...
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Страница 59: ...Figure 31 SS board SOS Detect 53 ...
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Страница 87: ...IC9709 Figure 36 TH 42PX25U 3 3V_SOS_5V_SOS detect 81 ...
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Страница 94: ...Figure 40 3 3V SOS and 5V SOS Detect Circuit TH 42XVS30 88 ...
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Страница 101: ...Figure 44 Power SOS and Fan SOS Detect Circuit TH 42XVS30 95 ...
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