Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 62
LC4.5E AA
9.
9.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter:
9.1 Introduction
9.2 Block Diagram
9.3 Power Supply
9.4 Input/Output
9.5 Tuner and IF
9.6 Video: TV Part (Diagrams A1, A2, and A3)
9.7 Video: Scaler Part (Diagram A7 and A13)
9.8 Audio Processing
9.9 Control
9.10 Abbreviation List
9.11 IC Data Sheets
9.1
Introduction
The LC4.5 LCD TV is a global LCD TV for the year 2005. It is
the successor of the LC04 LCD TV and covers screens size 30
inch (in 15:9 ratio) and has a new styling, called ME5.
This chassis has the following (new) features:
•
Audio
: The sound processor is part of the UOC processor
(called “Hercules”). The chassis has a FM Radio with 40
preset channels.
•
Video
: Enhanced video features, video drivers, Active
Control and multiple PIP.
The architecture consists of a TV and Scaler panel, I/O panel,
Side I/O and Local Keyboard panel and Power Supply panel.
The functions for video/audio processing, microprocessor (uP),
and CC/Teletext (TXT) decoder are all combined in one IC
(TDA120xx, item 7011), the so-called third generation Ultimate
One Chip (UOC-III) or “Hercules”. This chip has the following
features:
•
Control, small signal, mono/stereo, and extensive Audio/
Video switching in one IC.
•
Upgrade with digital sound & video processing.
•
Alignment free IF, including SECAM-L/L1 and AM.
•
FM sound 4.5/5.5/6.0/6.5, no traps/bandpass filters.
•
Full multi-standard colour decoder.
•
One Xtal reference for all functions (microprocessor, RCP,
TXT/CC, RDS, colour decoder, and stereo sound
processor).
9.2
Block Diagram
Figure 9-1 Block diagram
The PLL tuner UR1316 (with FM radio) delivers the IF-signal,
via audio & video SAW-filters, to the Video Signal Processor
and FLASH embedded TEXT/Control/Graphics Micro
Controller TDA120x1 (item 7011, also called Hercules). This IC
has the following functions:
•
Analogue Video Processing
•
Sound Demodulation
•
Audio Interfaces and switching
•
Volume and tone control for loudspeakers
•
Reflection and delay for loudspeaker channels
•
Micro Controller
•
Data Capture
•
Display
The Hercules has one input for the internal CVBS signal and a
video switch with 3 external CVBS inputs and a CVBS output.
All CVBS inputs can be used as Y-input for Y/C signals.
However, only 2 Y/C sources can be selected because the
circuit has 2 chroma inputs. It is possible to add an additional
CVBS(Y)/C input (CVBS/YX and CX) when the YUV interface
and the RGB/YPRPB input are not needed. Two SCART-
connectors are used: SCART1 is fully equipped and SCART2
is meant for VCR. Pin 10 of SCART2 is used for Easylink (P50)
and there is a possibility for Y/C in. The CVBS-out on pin 19
can be used for WYSIWYR (What You See Is What You
Record).
HERCULES
(VDP + STEREO)
TDA9178
CTI/LTI/Hist.
NVM
Tuner
TV/FM
3DYC
uPCxxx
(Option)
LIP
SYNC
GM1501
(SCALER)
NVM
FLASH
SDRAM
DISPLAY
PANEL
HDMI
Processor
Speakers
& HP
DMMI
(Multi-media
Interface)
Hercules-
Compair
(Service)
VGA
INPUT
HM
Link
(RJ12)
PC
Audio
INPUT
Cinch-to-VGA
Adapter
(YPbPr- HD)
MUX
MUX
ANALOGUE TV
SCALER
Audio
Amp
Embedded
Flash
I
2
S
YUV
Interface
Analogue
Input
24-bit
Input
DVI
Input
DVI-to-HDMI
Adapter
I
2
C
RGBHV/
YPbPr
RGB
& HV
Power Supply Unit
AC Mains
Input
HDMI
INPUT
DVI-D
INPUT
Option: Choose one
AV1
AV2
Side
Const
Audio
Out
TV/IOs
(SCART/Cinch)
Compair
(UART)
DMMI
LVDS
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