Circuit Descriptions, List of Abbreviations, and IC Data Sheets
EN 47
L03.1U AA
9.
PW_ADJ
This signal is generated by the UOC through a PWM port. This
PWM port is configured in Push Pull mode to generate a square
wave signal of 0 to 100% duty cycle with a default value of 50%
duty cycle.
PW_ADJ will eliminate tolerance and can adjust the picture
wide slightly.
9.8.5
Protection Events
Several protection events are controlled by the UOC. In case
one of these protections is activated, the set will go to
"Standby" mode.
Deflection Protections
The main protections for deflection are X-ray protection, frame
amplifier failure detection, black current loop stability
protection, and +8V auxiliary supply protection. For X-ray
protection, the X-ray detection bit, XDT, must always be set to
"1" (detection mode). High EHT protection must be triggered
via software upon detection of the XPR bit switching to "1".
A suitable number of checks are done before putting the set
into protection mode in order to prevent false triggering.
For service requirements, the Enable Vertical Guard (RGB
blanking), EVG, can be disabled (set to "0") although this is not
necessary.
The following bits are monitored:
•
SUP (Supply voltage indication)
•
XPR (X-ray protection)
•
EVG (Enable Vertical Guard)
•
NDF (Output Vertical Guard)
•
BCF (Black Current Failure)
I2C Protection
To check whether all I2C IC's are functioning.
9.9
Abbreviation List
2CS
2 Carrier (or Channel) Stereo
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
AFT
Automatic Fine Tuning
AGC
Automatic Gain Control: algorithm that
controls the video input of the feature
box
AM
Amplitude Modulation
AP
Asia Pacific
AR
Aspect Ratio: 4 by 3 or 16 by 9
ATS
Automatic Tuning System
AV
External Audio Video
AVL
Automatic Volume Leveler
BCL
Beam Current Limitation
B/G
Monochrome TV system. Sound
carrier distance is 5.5 MHz
BTSC
Broadcast Television Standard
Committee. Multiplex FM stereo sound
system, originating from the USA and
used e.g. in LATAM and AP-NTSC
countries
CC
Closed Caption
ComPair
Computer aided rePair
CRT
Cathode Ray Tube or picture tube
CSM
Customer Service Mode
CTI
Color Transient Improvement:
manipulates steepness of chroma
transients
CVBS
Composite Video Blanking and
Synchronization
CVI
Component Video Input
DAC
Digital to Analogue Converter
DBX
Dynamic Bass Expander or noise
reduction system in BTSC
D/K
Monochrome TV system. Sound
carrier distance is 6.5 MHz
DFU
Direction For Use: description for the
end user
DNR
Dynamic Noise Reduction
DSP
Digital Signal Processing
DST
Dealer Service Tool: special remote
control designed for dealers to enter
e.g. service mode
DVD
Digital Versatile Disc
EEPROM
Electrically Erasable and
Programmable Read Only Memory
EHT
Extra High Tension
EHT-INFO
Extra High Tension information
EPG
Electronic Programming Guide
EU
Europe
EW
East West, related to horizontal
deflection of the set
EXT
External (source), entering the set via
SCART or Cinch
FBL
Fast Blanking: DC signal
accompanying RGB signals
FILAMENT
Filament of CRT
FM
Field Memory or Frequency
Modulation
H
Horizontal sync signal
HP
Headphone
I
Monochrome TV system. Sound
carrier distance is 6.0 MHz
I2C
Integrated IC bus
IF
Intermediate Frequency
IIC
Integrated IC bus
Содержание 29PT5445/85
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