Circuit Descriptions, Abbreviation List, and IC Data Sheets
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 LCD
9.4 Input/Output
9.5 Tuner and IF (diagram A1)
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
Note:
•
Only
new
(not recently published) circuits are described
here. For the other circuit descriptions, see a.o. the A02,
FTL13, and FTL2.1 Service Manuals.
•
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 and circuit
diagrams. Where necessary, you will find a separate
drawing for clarification.
9.1
Introduction
The LC4.6 LCD TV is a global LCD TV for the year 2004. It is
the successor of the LC03 LCD TV and covers screens size 30
inch with a new styling called “Entry”.
This chassis has the following (new) features:
•
Audio
: The sound processor is part of the UOC processor
(called “Hercules”).
•
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.
•
FM sound, no traps/bandpass filters.
•
Full multi-standard color decoder.
•
One Xtal reference for all functions (microprocessor, RCP,
TXT/CC, RDS, color decoder, and stereo sound
processor).
9.2
Block Diagram
Figure 9-1 Block Diagram
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
E_14490_058.eps
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