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EN 100
9.
LC4.8E AA
•
LED. This signal is used as an indication for the Standby,
Remote and Error Indicator. Region diversity:
–
During protection mode, the LED blinks and the set is
in standby mode.
–
During error conditions it blinks at a predefined rate.
–
After receiving a valid RC-5 or local keyboard
command it flashes once.
–
For sets with error message indication, the LED blinks
when message is active and the set is in standby
mode.
•
SCL. This is the clock wire of the two-wire single master bi-
2
directional I
C bus.
•
SDA. This is the data wire of the two-wire single master bi-
2
directional I
C bus.
•
STANDBY. The Hercules generates this signal. This can
enable the power supply in normal operation and disable it
during Standby. It is of logic "high" (3.3 V) under normal
operation and "low" (0 V) during Standby.
•
IR. This input pin is connected to an RC5 remote control
receiver.
•
SEL-IF. This is an output pin to switch the Video SAW filter
between M system and other systems.
–
0: NTSC M (default)
–
1: PAL B/G, DK, I, L
•
NVM_WP. The global protection line is used to enable and
disable write protection to the NVM. When write to the
NVM is required, pin 7 of the NVM must be pulled to logic
'0' first (via Write_Protect of the micro-controller pin) before
a write is performed. Otherwise pin 7 of NVM must always
be at logic "1"
–
0: Disabled
–
1: Enabled (default)
•
SOUND_ENABLE. This pin is used to MUTE the audio
amplifier. It is configured as push pull.
•
STATUS_1. This signal is used to read the status of the
SCART 1 input.
•
STATUS_2. This signal is used to read the status of the
SCART 2 input.
•
HERC_RESET. This pin is used to switch the +1.8V
supply.
•
POWER_DOWN. The power supply generates this signal.
Logic "high" (3.3 V) under normal operation of the TV and
goes "low" (0 V) when the Mains input voltage supply goes
below 70 V
.
AC
•
KEYBOARD. Following are the Keyboard functions and
the step values (8 bit) for it.
Table 9-3 Local keyboard values
Function
NAFTA Standby
Ch +
Exit Factory (Ch- and Vol-) 0.69
Ch -
Menu (Vol - and Vol +)
Vol -
DVD Eject
Vol +
•
TV_IRQ. This signal is the interrupt from the Scaler IC.
•
TV_SC_COM. This signal is used for the communication
with the Scaler IC.
•
EXT_MUTE. This signal is used to reduce the Switch-off
plop.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
Voltage
Step values
(V
)
(8 bit)
DC
0
0 - 6
0.43
7 - 33
34 - 53
0.93
54 - 73
1.19
74 - 96
1.49
97 - 121
1.8
122 - 147
2.12
148 - 169
9.10 Abbreviation List
0/6/12
1080i
1080p
2CS
480i
480p
ACI
ADC
AFC
AGC
AM
AP or A/P
AR
ASD
AV
B-SC1-IN
B-SC2-IN
B-TXT
B/G
BOCMA
C-FRONT
CBA
CL
CLUT
COLUMBUS
ComPair
CSM
CVBS
CVBS-EXT
CVBS-INT
CVBS-MON
CVBS-TER-OUT
DAC
DBE
DFU
DNR
DRAM
DSP
DST
SCART switch control signal on A/V
board. 0 = loop through (AUX to TV), 6
= play 16:9 format, 12 = play 4:3
format
1080 visible lines, interlaced
1080 visible lines, progressive scan
2 Carrier Sound (or 2 Channel Stereo)
480 visible lines, interlaced
480 visible lines, progressive scan
Automatic Channel Installation:
algorithm that installs TV channels
directly from a cable network by
means of a predefined TXT page
Analogue to Digital Converter
Automatic Frequency Control; Control
signal used to tune and lock to the
correct frequency
Automatic gain control (feedback)
signal to the tuner. This circuit ensures
a constant output amplitude
regardless of the input amplitude
Amplitude Modulation; A "data
encoding to a carrier" method, such
that the carrier amplitude is
proportional to the data value
Asia Pacific
Aspect Ratio: 4 by 3 or 16 by 9
Automatic Standard Detection
External Audio Video
Blue SCART1/EXT1 in
Blue SCART2/EXT2 in
Blue TeleteXT
Monochrome TV system. Sound
carrier distance is 5.5 MHz. B= VHF-
band, G= UHF-band
Bimos one Chip Mid-end Architecture:
video and chroma decoder
Chrominance front input
Circuit Board Assembly (also called
PCB or PWB)
Constant Level: audio output to
connect with an external amplifier
Colour Look-Up Table
COLour LUMinance Baseband
Universal Subsystem. IC performing
noise reduction and 2D/3D comb
filtering
Computer aided rePair. A tool for
diagnosing a TV through a PC
controlled interface
Customer Service Mode
Composite Video and Blanking Signal;
A single video signal that contains
luminance, colour, and timing
information
CVBS signal from external source
(VCR, VCD, etc.)
CVBS signal from internal Tuner
CVBS monitor signal
CVBS TERrestrial OUTput signal
Digital to Analogue Converter
Dynamic Bass Enhancement: extra
low frequency amplification
Directions For Use: Owner's manual
Dynamic Noise Reduction / Digital
Noise Reduction; Noise reduction
feature of the set
Dynamic RAM; dynamically refreshed
RAM
Digital Signal Processing
Dealer Service Tool; Special remote
control designed for dealers to enter
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