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EN 52
9.
LC4.1E AB
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 Tuner and IF
9.5 Video: TV Part (diagrams B1, B2, and B3)
9.6 Video: Scaler Part (diagram B6, B7, and B8)
9.7 Audio Processing
9.8 Control
9.9 LCD Display
9.10 Abbreviation List
9.11 IC Data Sheets
9.1
Introduction
The LC4.1 LCD TV is a global LCD TV for the year 2005. It is
the successor of the LC13 LCD TV and covers screens sizes
15, 17, 20 and 23 inch (in both 4:3 and 16:9 ratio) with ME5 and
ARCH3 styling.
This chassis has the following (new) features:
9.2
Block Diagram
Main
Board
Tuner
TV/FM
IIC
AV1
Compair
(Scart or
(Service)
Cinch)
Audio amplifier(2x5w)
board for 20,23 inch
AUD_SUP AUDIO CONTROL
SINGALS
(Standby, Mute,)
Circuit Descriptions, Abbreviation List, and IC Data Sheets
AC Mains Input
NVM
RGB Output
HERCULES
(VDP+STEREO)
Embedded
555
Flash
trigger
H/V
circuits
Sync
Audio
Amplifier(2x2
w)
Speakers
and HP
Side AV
Audio Output
CVBS/YC Input
Panel
and HP output
Figure 9-1 Block Diagram LC4.1
•
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, Top Control panel, Sound Amplifier panel
(depending on model), LED/IR 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).
Power Supply
Low Pass
Video Filter
Filter
(SM5301BS-
Video Buffer
Jump
Schmitt
Switch
Triggers
(74HC4053D)
SD_PCHD_SEL
PC
detect
circuit
RGB or YPbPr
H/V Sync
VGA INPUT
Cinch_to_VGA
Adaptor
(YPbPr)
PC Audio Input
UART (Optional)
SOG, R_PR+, R_PR-,
G_Y+, G_Y-, B_PB+,
B_PB- signal producing
circuits
with LSI
G)
FLASH
NVM
Memory
PC_HD_SEL
Pin181,182
GM5221
Pin85
Pin 111
(PC_DET)
GND( Industrial
mode)
+3V3STBY( normal
operation)
VGA_5V
Compair
(UART)
LCD
Panel
LVDS/TTL
E_14520_046.eps
160904
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