Sony FWD-40LX1, Руководство по обслуживанию

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FWD-40LX1
3-2
3-2. D3 Board
The D3 board has three paths that pass through an INPUT1 terminal (DVI connector: CN1400, mini-pin
jack: J1400), INPUT2 terminal (HD15 connector: CN1600, mini-pin jack: J1600), and CN1000 on the D3
board from the V1 board, as the input path of video and audio signals.
The audio signals from the INPUT1 terminal (J1400) and INPUT2 terminal (J1600) are input to audio
switches (IC1600 and IC1601), and the signal selected by the port control of a microcomputer is output
from CN1000 to the V1 board. The signal selected from among the audio signals (including the audio
signal of an option board) is output from the CN1000 to AUDIO OUT (J1002) of RCA and from the
CN1209 to the K1 board.
The video signal from an INPUT1 terminal is directly input to the TMDS input port of a scaler (IC2300).
The video signal from an INPUT2 terminal is passed through the V1 board and selected by the input
signal (RGB signal) from an option board and a switch (IC1603). The RGB signal is input to the analog
input port of a scaler (IC2300). The input signal from the INPUT2 terminal differs between one- and
two-screen configurations when it is a component signal. For one-screen display, the output signal of a
switch (IC1603) is input to the V1 board through CN1000. During two-screen configuration with the
video signal from an option board, a signal is input to the analog input port of a scaler as in an RGB
signal. During two-screen configuration with an INPUT1 signal, a signal is input to the V1 board as
during one-screen configuration.
The video signal from the V1 board is input to the video port of a scaler as an eight-bit digital RGB
signal.
In a scaler (IC2300), resolution is converted according to the resolution of a display panel. Also, a wide-
angle or zoom function is set as required. A TMDS receiver is mounted for the input signal from an
INPUT1 terminal. A/D converter is mounted in an analog input port. Three input ports including a video
port are provided. This enables the two-screen display of P&P and PinP.
There are color matrix switching, Cinema Drive (not including NTSC), and color collect setting as other
functions. The picture quality adjustment that is made using a processor (IC2004) in the later stage
during one-screen display is made using a scaler during two-screen display. OSD is also drawn and
superimposed in a scaler.
An eight-bit digital RGB signal is input from a scaler (IC2300) to the processor (IC2004) in the later
stage. In the processor, the picture quality such as contrast, brightness, color depth, hue, sharpness, noise
reduction, a dynamic picture, gamma correction, and a color temperature is set. Moreover, the specific
point of the video signal input in a processor can be read using 12-bit RGB data. AD or WB is adjusted
based on this value.
An eight-bit digital RGB signal is input from a processor (IC2004) to an LVDS transmitter (IC2200),
format-converted, and LVDS-transferred to the panel. The output signal of a transmitter is set by the
voltage control of a port. The voltage control is performed by the port output signal of an I/O expander
(IC2202) via a transistor. The expander is output-controlled from a microcomputer by I
2
C.
The video signal from an LVDS transmitter is output from CN2200. Additionally, the logic power of a
panel is supplied to the LCD panel via CN2203. The control signal from a microcomputer is output from
CN2202 to a back light module, and power is supplied from CN1005.