Philips LC4.9E, Руководство по обслуживанию

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Circuit Descriptions, Abbreviation List, and IC Data Sheets EN 141 LC4.9E AB 9.
9.10.2 Passive Standby State
The set is in standby mode. The module is in off state.
9.10.3 Active Standby State
The set is in “Semi-Standby” mode. All the circuits in the set,
except the audio output and the LCD display are powered up
and fully active. The set appears to be in normal standby mode
for the customer.
The module is in “On” or “Logical Standby” state.
•
On state. In this state the module can perform the following
pre-programmed functions:
–
VCR (digital program) records
– EPG updates
– Over-the-air software download signaling detection
and software downloads
• Logial Standby state. In this state only over-the-air
software download signaling detection and software
downloads can be performed.
9.10.4 On State
The set is fully functional and the module is powered up. The
module is in “On” or “Logical Standby” state.
•
On state. In this state all system functionality is available or
the module is in software downloading process.
• Logial Standby state. In this state only over-the-air
software download signaling detection and software
downloads can be performed.
9.11 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
BOCMA Bimos one Chip Mid-end Architecture:
video and chroma decoder
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
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
CVBS-EXT CVBS signal from external source
(VCR, VCD, etc.)
CVBS-INT CVBS signal from internal Tuner
CVBS-MON CVBS monitor signal
CVBS-TER-OUT CVBS TERrestrial OUTput signal
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