
Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 45
LC4.1U AA
9.
9.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Index of this chapter
1.
Introduction
2.
Block Diagram
3.
Power Supply
4.
Input/Output
5.
Tuner and IF
6.
Video: TV Part
7.
Video: Scaler Part
8.
Audio Processing
9.
Control
10.
LCD Display
11.
Abbreviation List
12.
IC Data Sheets
9.1
Introduction
The LC4.1 LCD TV is a global LCD TV for the year 2004. It is
the successor of the LC13 LCD TV and covers screens sizes
14, 15, 17, 20 and 23 inch (in both 4:3 and 16:9 ratio) with SP2
and ARCH3 styling.
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 and Active
Control.
The architecture consists of a TV and Scaler panel with I/O,
Side I/O panel, Sound Amplifier Panel, Top Control Panel and
Power Supply panel.
The functions for video/audio processing, microprocessor (P),
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 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 LC4.1
Power Supply
LCD
Panel
Tuner
TV/FM
NVM
Compair
(Service)
AV1
(Scart or
Cinch)
Speakers
and HP
Video Filter
with LSI
(SM5301BS-
G)
Embedded
Flash
Switch
(74HC4053D)
IIC
HERCULES
(VDP+STEREO)
Audio
Amplifier(2x2
w)
RGB Output
H/V
Sync
VGA INPUT
Cinch_to_VGA
Adaptor
(YPbPr)
H/V Sync
RGB or YPbPr
Pin181,182
NVM
FLASH
Memory
GM5221
Compair
(UART)
SD_PCHD_SEL
PC_HD_SEL
LVDS/TTL
AC Mains Input
Jump
Main
Board
Audio amplifier(2x5w)
board for 20,23 inch
Side AV Audio Output CVBS/YC Input PC Audio Input UART (Optional)
Panel and HP output
AUD_SUP
AUDIO CONTROL
SINGALS
(Standby, Mute,)
555
trigger
circuits
Schmitt
Triggers
Video Buffer
Low Pass
Filter
SOG, R_PR+, R_PR-,
G_Y+, G_Y-, B_PB+,
B_PB- signal producing
circuits
Pin85
(PC_DET)
PC
detect
circuit
VGA_5V
Pin 111
+3V3STBY( normal
operation)
GND( Industrial
mode)
E_14520_046.eps
160904