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
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 2006. It is
the successor of the LC13 LCD TV and covers screens sizes
15, 20 and 23 inch (in both 4:3 and 16:9 ratio) with ME5FL and
ME5P 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, 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 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 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
