Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 31
SK5.1L CA
9.
9.3
Abbreviation List
2CS
2 Carrier Sound
A2
Commonly known as 2 Carrier Sound
(2CS) system
AC
Alternating Current
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 to the correct
frequency
AGC
Automatic Gain Control: algorithm that
controls the video input of the feature
box
AM
Amplitude Modulation
ANC
Automatic Noise Reduction; One of
the algorithms of Auto TV
AP
Asia Pacific
AR
Aspect Ratio: 4 by 3 or 16 by 9
AV
Audio Video
AVL
Automatic Volume Level control
B/G
Monochrome TV system. Sound
carrier distance is 5.5 MHz
BCL
Beam Current Limiter
CBA
Circuit Board Assembly (or PWB)
CFR
Carbon Film Resistor
ComPair
Computer aided rePair
CRT
Cathode Ray Tube (or picture tube)
CVBS
Composite Video Blanking and
Synchronisation
CVI
Component Video Input
D/K
Monochrome TV system. Sound
carrier distance is 6.5 MHz. D= VHF-
band, K= UHF-band
DAC
Digital to Analogue Converter
DC
Direct Current
DC-filament
Filament supply voltage
DFU
Directions For Use: owner's manual
DPL
Dolby Pro Logic
DRAM
Dynamic RAM; dynamically refreshed
RAM
DVD
Digital Versatile Disc
EEPROM
Electrically Erasable and
Programmable Read Only Memory
EHT
Extreme High Tension; the voltage
between the cathode and the shadow
mask that accelerates the electrons
towards the screen (around 25 kV)
EMI
Electro Magnetic Interference;
Leakage of high-frequency radiation
from a transmission medium
EU
EUrope
EW
East West, related to horizontal
deflection of the set
EW-DRIVE
East -West correction drive signal.
EXT
EXTernal (source), entering the set by
SCART or by cinches (jacks)
FBL
Fast Blanking: DC signal
accompanying RGB signals
FE
Front End; Tuner and RF part together
Field
Each interlaced broadcast FRAME is
composed of two Fields, each Field
consists of either Odd or Even lines
Filament
Filament of CRT
FM
Field Memory / Frequency Modulation
Frame
A complete TV picture comprising all
lines (625/525)
FTV
Flat TeleVision
G
Green
H
H_sync to the module
H-DRIVE
Horizontal Drive
H-FLYBACK
Horizontal Flyback
H-OUT
H_sync output of the module /
Horizontal Output pulse
HA
Horizontal Acquisition; horizontal sync
pulse
HFB
Horizontal Flyback Pulse; Horizontal
sync pulse from large signal deflection
HW
Hardware
I
Monochrome TV system. Sound
carrier distance is 6.0 MHz. VHF- and
UHF-band
I
2
C
Inter IC bus (also called IIC)
I
2
S
Inter IC Sound bus
IC
Integrated Circuit
IF
Intermediate Frequency
IIC
Inter IC bus (also called I2C)
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.
IO
In/Out
IR
Infra Red
L
Left audio channel
L/L’
Monochrome TV system. Sound
carrier distance is 6.5 MHz. L' is Band
I, L is all bands except for Band I
LATAM
LATin AMerica
LED
Light Emitting Diode
LOT
Line Output Transformer (also called
FBT); The transformer in which the
EHT is generated
LS
Loud Speaker
M/N
Monochrome TV system. Sound
carrier distance is 4.5 MHz. M= 525
lines @ 60 Hz, N= 625 lines @ 50 Hz
MOFR
Metal Oxide Film Resistor
MOSFET
Metal Oxide Semiconductor Field
Effect Transistor
MPX
MultiPleX
NAFTA
North American Free Trade
Association: Trade agreement
between Canada, USA and Mexico
NC
Not Connected
NICAM
Near Instantaneously Companded
Audio Multiplexing; This is a digital
sound system, mainly used in Europe
NTC
Negative Temperature Coefficient,
non-linear resistor (resistance
decreases if temperature increases)
NTSC
National Television Standard
Committee. Colour system used
mainly in North America and Japan.
Colour carrier NTSC M/N = 3.579545
MHz, NTSC 4.43 = 4.433619 MHz
(this is a VCR norm, it is not
transmitted off-air)
NVM
Non Volatile Memory; IC containing
data such as alignment values, preset
stations
OB
Option Byte
OC
Open Circuit
OP
OPtion byte
OSD
On Screen Display
P50
Project 50; Communication protocol
between TV and peripherals
PAL
Phase Alternating Line; Colour system
mainly used in West Europe (colour
carrier= 4.433619 MHz) and South
America (colour carrier PAL M=
3.575612 MHz and PAL N= 3.582056
MHz)
PCB
Printed Circuit Board (or PWB)
PLL
Phase Locked Loop; Used for e.g.
FST tuning systems. The customer
