Philips EM5E, Руководство по обслуживанию, Страница: 124 / 136

Circuit Descriptions and Abbreviation List EN 124 EM5E 9.
8. During start-up of the deflection, I
2
C traffic must be
disabled for 250 ms to avoid data corruption. If flashes or
spikes are generated during EHT start-up, I
2
C data could
be disturbed or corrupted.
9. After deflection is powered up completely, all the other
protection-algorithms are activated.
10. The black current stabilisation loop in the HOP is switched
on. Some extra checking is done to ensure that the loops
are completely stabilised.
11. The OTC sets all the necessary parameters for a correct
sound and image and unblanks the picture.
9.17 Abbreviation list
2DNR Spatial (2D) Noise Reduction
3DNR Temporal (3D) Noise Reduction
AARA Automatic Aspect Ratio Adaptation:
algorithm that adapts aspect ratio to
remove horizontal black bars; keeping
up the original aspect ratio
ACI Automatic Channel Installation:
algorithm that installs TV sets directly
from 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
ANR Automatic Noise Reduction: one of the
algorithms of Auto TV
AR Aspect Ratio: 4 by 3 or 16 by 9
Artistic see OTC 2.5: main processor
ASF Auto Screen Fit: algorithm that adapts
aspect ratio to remove horizontal black
bars but without throwing away video
information
ATV See Auto TV
AUDIO_C Audio Centre
AUDIO_L Audio Left
AUDIO_R Audio Right
AUDIO_SL Audio Surround Left
AUDIO-SR Audio surround right
AUDIO_SW Audio Subwoofer
Auto TV A hardware and software control
system that measures picture content,
and adapts image parameters in a
dynamic way
BC-PROT Protection signal to the uP for a too
high Beam Current.
BG System B and G
BLC-INFO Black Current Info
B-SC1-IN Blue SCART1 in
B-SC2-IN Blue SCART2 in
B-TXT Blue teletext
CL Constant Level: audio output to
connect with an external amplifier
ComPair Computer aided rePair
CRT Cathode Ray Tube or picture tube
CSM Customer Service Mode
CTI Colour Transient Improvement:
manipulates steepness of chroma
transients
CVBS Composite Video Blanking and
Synchronisation
CVBS-TER CVBS terrestrial
DAC Digital to Analogue Converter
DBE Dynamic Bass Enhancement: extra
low frequency amplification
DC-filament Filament supply voltage
DFU Direction For Use: description for the
end user
DNR Digital Noise Reduction: noise
reduction feature of the box
DSP Digital Signal Processing
DST Dealer Service Tool: special remote
control designed for dealers to enter
e.g. service mode
DVD Digital Versatile Disc
DYN-FASE-COR Dynamic phase correction, to correct
the phase of the H-drive
Eagle Feature box IC performing peaking,
zooming and sub pixel LTI in both
horizontal and vertical direction, CTI
and other colour features
EHT Extra High Tension
EHT-INFO Extra High Tension information, used
for contrast reduction, vertical and
horizontal amplitude correction, beam
current protection, and flash detection.
EPG Electronic Program Guide: system
used by broadcasters to transmit TV
guide information (= NexTView)
EW East West, related to horizontal
deflection of the set
EW-DRIVE The drive signal for the EW-transistor
EXT External (source), entering the set via
SCART or via cinches
FALCONIC SAA4992H, feature box IC performing
Digital Natural Motion, 3DNR, and
vertical zoom and vertical peaking
FBL Fast Blanking: DC signal
accompanying RGB signals
FBL-PIP The fast blanking signal for PIP
FBL-TXT The fast blanking signal for TXT. It has
a higher priority than FBL-PIP
FBSCO Fixed Beam Current Switch Off, a 140
V dip detection to activate the black
switch off circuit
FBX Feature Box: part of small signal /
separate module which contains 100
Hz processing, extra featuring and
AutoTV algorithms (FBX6= based on
PICNIC, FBX7= based on PICNIC and
Eagle)
FDS Full Dual Screen
FILAMENT Filament of CRT
FLASH Flash memory
FM Field Memory or Frequency
Modulation
G-TXT Green teletext
GND-DRIVE A separate ground for the line-drive
towards the line driver
H
A50
Horizontal Acquisition 1fh: horizontal
sync pulse coming out of the HIP
H
D100
Horizontal Drive 2fh: horizontal sync
pulse coming out of the feature-box
HD@HOME A signal from the OTC, to switch the
HOP to the Pixel Plus standard (75 Hz
frame)
HFB Horizontal Flyback Pulse: horizontal
sync pulse from large signal deflection
HIP High-end video Input Processor
(TDA9320): video and chroma
decoder of EM5E
HOP High-end video Output Processor
(TDA9330): video, sync, and
geometry controller of EM5E
HP Headphone
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
I
2
C Integrated IC bus