Toshiba TDP-MT700 Service-Handbuch - Seite 9

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MT700 Service Manual

4. Circuit Operation

4.1. System Block Diagram

MT700 consist of the connector, main, chip board. The connector board provides the input

terminal and RS-232 for service ,video input(Composite, S-video, YcbCr) and graph

input(RGB BNC , Y Pb Pr). The main board provides the A/D converter for the graph input

(HDMI, RGB BNC, YPbPr) and decoder function for the video input. That supports also the

scaler and color process function. For the interlace video, the board supports the de-

interlace function. Besides, the boards provide the color wheel driver ,the lamp enable

functions and DMD chip control function.

This video projector can accept the following six kinds of input sources:

(1) HDMI

(2) RGBHV

(3) Component 1

(4) Component 2

(5) S-Video

(6) Composite

As shown in the system block diagram, there are seven boards in the system. They are:

(1) Main Board

(2) DMD Chip Board

(3) Thermal Sensor Board

(4) Color Wheel Sensor Board

(5) Keypad Board

(6) Ballast

(7) Power board

(8) IR board

In the main board circuits, it contains AD converter (AD9883), HDMI receiver (SII9993),

Video decoder (SAA7118), de-interlace processor (FLI2310), Scalar (OPLUS RM-103) and

CPU (RDC2021).