Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 69TPM1.3HE LA 9.
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Block Diagram
9.3 Abbreviation List
9.4 IC Data Sheets
Notes:
•Only new circuits (circuits that are not published recently)
are described.
• Figures can deviate slightly from the actual situation, due
to different set executions.
• For a good understanding of the following circuit
descriptions, please use the Wiring, Block (chapter 6) and
Circuit Diagrams (chapter 7). Where necessary, you will
find a separate drawing for clarification.
9.1 Introduction
• This chassis uses a 1440x900 WXGA+ LCD panel for the
19” model and a 1680x1050 WSXGA+ LCD panel for the
22” model. It supports PC modes via the VGA D-sub and
HDMI inputs, and supports component video, composite
video and audio input, full SCART input, HDMI with HDCP.
YPbPr can support up to 1080i and HDMI can support up
to 1080p (both should also support down to and including
480i).
• This chassis uses the MediaTek MT5335PGU scaler IC.
This IC combines a transport de-multiplexer, a high
definition MPEG-2 video decoder, an MPEG2 audio
decoder, an LVDS transmitter, and a NTSC/PAL/SECAM
TV decoder with a 3D comb filter. It also has a built-in high
resolution and high-quality audio codec. It includes the
MediaTek 2D MDDi de-interlace solution to generate
smooth motion pictures. A 3D comb filter added to the TV
decoder recovers great detail for still pictures. The special
colour processing technology provides natural, deep
colours and true studio quality graphics.
• It integrates HDMI1.3, high speed VGA ADC, dual-channel
LVDS, and USB2.0 receiver.
9.2 Block Diagram
Figure 9-1 Scaler board block diagram 19" & 22"
5V
Power
3.3V,2.5V,1.8V,1.2V,1.1V
IR
Headphone
Audio AMP
TDA8932BTW
12V
SB-01
MT5335PGU
MPEG-1 layer I/II decoding
Audio ADC
Audio DAC
3D surround processing with
Virtual surround
Automatic volume control
Audio I/F
2-D Graphic
De-interlace
VADCx4
HDMI In I/F
Digital TV Demodulator
Analog TV IF Demodulator
TV audio demodulator
USB2.0
3.3V,2.5V,1.2V,1.1V
Power
Board
16V
Common Interface Controller
MT8295
3.3V,1.8V
PCMCIA
5V,3.3V
D-SUB/PC-VGA
SCART
HDMI 1
HDMI 2
HDMI MUX
TMDS251PAGR
5V,3.3V
Audio R/L of CVBS
Audio R/L of PC
YPbPr/L/R
Keypad
Channel demodulator
MT5133
3.3V
TUNER
ENG37E14KF
5V
SB-04
SB-13
SB-13
Sub MCU
WT6702F_OG200WT
3.3V
SB-11
SB-10
Flash MX25L3205DMI-12G
DDR SDRAM
HY5DU121622DTP-D43
2.5V
SB-19
SB-18
SB-17
SB-13
SB-03
SB-01
SB-02
SB-09
SB-15
SB-18
SPIDF OUT
2.5V
SB-18
SB-14
EARPHONE AMP
SB-17
USB Port
SB-10
I_18120_020.eps
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