Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 75
LC4.41A AA
9.
9.4
Abbreviation List
0/6/12
SCART switch control signal on A/V
board. 0 = loop through (AUX to TV), 6
= play 16:9 format, 12 = play 4:3
format
1080i
1080 visible lines, interlaced
1080p
1080 visible lines, progressive scan
2CS
2 Carrier Sound (or 2 Channel Stereo)
480i
480 visible lines, interlaced
480p
480 visible lines, progressive scan
ACI
Automatic Channel Installation:
algorithm that installs TV channels
directly from a cable network by
means of a predefined TXT page
ADC
Analogue to Digital Converter
AFC
Automatic Frequency Control; Control
signal used to tune and lock to the
correct frequency
AGC
Automatic Gain Control (feedback)
signal to the tuner. This circuit ensures
a constant output amplitude
regardless of the input amplitude
AM
Amplitude Modulation; A "data
encoding to a carrier" method, such
that the carrier amplitude is
proportional to the data value
AP or A/P
Asia Pacific
AR
Aspect Ratio: 4 by 3 or 16 by 9
ASD
Automatic Standard Detection
AV
External Audio Video
B-SC1-IN
Blue SCART1/EXT1 in
B-SC2-IN
Blue SCART2/EXT2 in
B-TXT
Blue TeleteXT
B/G
Monochrome TV system. Sound
carrier distance is 5.5 MHz. B= VHF-
band, G= UHF-band
C-FRONT
Chrominance front input
CBA
Circuit Board Assembly (also called
PCB or PWB)
CL
Constant Level: audio output to
connect with an external amplifier
CLUT
Colour Look-Up Table
COFDM
Coded Orthogonal Frequency Division
Multiplexing: a multiplexing technique,
that distributes the data to be
transmitted, over many carriers
COLUMBUS
COLour LUMinance Baseband
Universal Subsystem. IC performing
noise reduction and 2D/3D comb
filtering
ComPair
Computer aided rePair. A tool for
diagnosing a TV through a PC
controlled interface
CSM
Customer Service Mode
CVBS
Composite Video and Blanking Signal;
A single video signal that contains
luminance, colour, and timing
information
DAC
Digital to Analogue Converter
DBE
Dynamic Bass Enhancement: extra
low frequency amplification
DFU
Directions For Use: Owner's manual
DNR
Dynamic Noise Reduction / Digital
Noise Reduction; Noise reduction
feature of the set
DRAM
Dynamic RAM; dynamically refreshed
RAM
DSP
Digital Signal Processing
DST
Dealer Service Tool; Special remote
control designed for dealers to enter
e.g. service mode (a DST-emulator is
available in ComPair)
EEPROM
Electrically Erasable and
Programmable Read Only Memory
EPG
Electronic Program Guide: system
used by broadcasters to transmit TV
guide information (= NexTView)
EU
Europe
EXT
EXTernal (source), entering the set by
SCART or by cinches (jacks)
FBL
Fast BLanking; DC signal
accompanying RGB signals. To blank
the video signal when it is returning
from the right side of the screen to the
left side. The video level is brought
down below the black video level
FM
Field Memory; A memory chip that is
capable of storing one or more TV
picture fields / Frequency Modulation;
A technique that sends data as
frequency variations of a carrier signal
FRC
Frame Rate Converter
H
H_sync to the module
HA
Horizontal Acquisition; horizontal sync
pulse
HD
High Definition
HP
HeadPhone
I
Monochrome TV system. Sound
carrier distance is 6.0 MHz. VHF- and
UHF-band
I
2
C
Integrated IC bus
I
2
S
Integrated IC Sound bus
IC
Integrated Circuit
IF
Intermediate Frequency
Interlaced
Scan mode where two fields are used
to form one frame. Each field contains
half the number of the total amount of
lines. The fields are written in "pairs",
causing line flicker.
IR
Infra Red
IRQ
Interrupt ReQuest
Last Status
The settings last chosen by the
customer and read and stored in RAM
or in the NVM. They are called at start-
up of the set to configure it according
to the customer's preferences
LATAM
LATin AMerica
LED
Light Emitting Diode; A semiconductor
diode that emits light when a current is
passed through it
L/L'
Monochrome TV system. Sound
carrier distance is 6.5 MHz. L' is Band
I, L is all bands except for Band I
LS
LoudSpeaker
LVDS
Low Voltage Differential Signalling,
data transmission system for high
speed and low EMI communication.
M/N
Monochrome TV system. Sound
carrier distance is 4.5 MHz. M= 525
lines @ 60 Hz, N= 625 lines @ 50 Hz
MOSFET
Metal Oxide Semiconductor Field
Effect Transistor
MPEG
Motion Pictures Experts Group. An
ISO/IEC body that has given its name
to an image compressing scheme for
moving video
MSP
Multi-standard Sound Processor: ITT
sound decoder
MUTE
MUTE Line
NC
Not Connected
NICAM
Near Instantaneously Companded
Audio Multiplexing; This is a digital
sound system, mainly used in Europe
NTSC
National Television Standard
Committee. Colour system used
mainly in North America and Japan.
Colour carrier NTSC M/N = 3.579545
