Block Diagram - Vizio GV42L HDTV Service Manual

Chapter 10 Block Diagram
System Block Diagram
42" WXGA panel
Digital
Video bus AC IN
Power Board
Speakers
J6 j5 J7 J4
Main Board
DTU1 DP1 P8 P11 P10 P9 P3 P6 P4 P5 P12 P2 P13
□□□□□
Keypad/IR
Board
RF SPDIF RJ11 HDMI1 HDMI2 RCAX2 YPbPr RCA AV
VGA PHONE S-video RCA OUT
The TV system block diagram is powered by power board that transforms AC source
of 100V~240V AC +/- 10% @ 50/60 HZ into DC 5V & 12V& 24Vsource. The main
board receives different types of video signal into the MTK8202 Ic. Afterward, the
MTK8202 Ic process the signals control the various functions of the monitor and
outputs control signal, video signal and power to the 42" WXGA panel to be
displayed.
The power send to the panel is first processed by the inverter. The function of the
inverter is to step up the voltage supplied by the main board to the power that is
needed to light up the lamps in the panel. Simultaneously, the digital video signals are
processed in the panel and the outcome determines the brightness, pixel on/off and
the color displayed on the panel. The analog video signals of S-video, YPbPr, TV, PC
and A/V all video signals are translated from analog signals into MTK8202 generates
the vertical and horizontal timing signals for display device. The analog audio of
s-video, YpbPr, TV, PC and A/V is transmitting to the WM877 processed.
CONFIDENTIAL – DO NOT COPY Page 10-1
File No. SG-0198