Abbreviation List - Philips 32PF9968/10 Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets
The description of each functional pin is explained below:
• LED. This signal is used as an indication for the Standby,
Remote and Error Indicator. Region diversity:
– During protection mode, the LED blinks and the set is
in standby mode.
– During error conditions it blinks at a predefined rate.
– After receiving a valid RC-5 or local keyboard
command it flashes once.
– For sets with error message indication, the LED blinks
when message is active and the set is in standby
mode.
• SCL. This is the clock wire of the two-wire single master bi-
2
directional I C bus.
• SDA. This is the data wire of the two-wire single master bi-
2
directional I C bus.
• STANDBY. The Hercules generates this signal. This can
enable the power supply in normal operation and disable it
during Standby. It is of logic "high" (3.3 V) under normal
operation and "low" (0 V) during Standby.
• IR. This input pin is connected to an RC5 remote control
receiver.
• SEL-IF. This is an output pin to switch the Video SAW filter
between M system and other systems.
– 0: NTSC M (default)
– 1: PAL B/G, DK, I, L
• NVM_WP. The global protection line is used to enable and
disable write protection to the NVM. When write to the NVM
is required, pin 7 of the NVM must be pulled to logic '0' first
(via Write_Protect of the micro-controller pin) before a write
is performed. Otherwise pin 7 of NVM must always be at
logic "1"
– 0: Disabled
– 1: Enabled (default)
• SOUND_ENABLE. This pin is used to MUTE the audio
amplifier. It is configured as push pull.
• STATUS_1. This signal is used to read the status of the
SCART 1 input.
• STATUS_2. This signal is used to read the status of the
SCART 2 input.
• HERC_RESET. This pin is used to switch the +1.8V
supply.
• POWER_DOWN. The power supply generates this signal.
Logic "high" (3.3 V) under normal operation of the TV and
goes "low" (0 V) when the Mains input voltage supply goes
below 70 V .
AC
• KEYBOARD. Following are the Keyboard functions and
the step values (8 bit) for it.
Table 9-3 Local keyboard values
Voltage
Function (V
NAFTA Standby 0
Ch + 0.43
Exit Factory (Ch- and Vol-) 0.69
Ch - 0.93
Menu (Vol - and Vol +) 1.19
Vol - 1.49
DVD Eject 1.8
Vol + 2.12
• TV_IRQ. This signal is the interrupt from the Scaler IC.
• TV_SC_COM. This signal is used for the communication
with the Scaler IC.
• EXT_MUTE. This signal is used to reduce the Switch-off
plop.
Step values (8
) bit)
DC
0 - 6
7 - 33
34 - 53
54 - 73
74 - 96
97 - 121
122 - 147
148 - 169
LC4.8L LA

9.10 Abbreviation List

1080i
1080p
2CS
480i
480p
ADC
AFC
AGC
AM
AP or A/P
AR
ASD
AV
B/G
CBA
CL
CLUT
COLUMBUS
ComPair
CSM
CVBS
DAC
DBE
DFU
DNR
DRAM
DSP
EEPROM
EPG
EU
EXT
FBL
FM
FRC
FRONT-C
9. EN 81
1080 visible lines, interlaced
1080 visible lines, progressive scan
2 Carrier Sound (or 2 Channel Stereo)
480 visible lines, interlaced
480 visible lines, progressive scan
Analogue to Digital Converter
Automatic Frequency Control; Control
signal used to tune and lock to the
correct frequency
Automatic gain control (feedback)
signal to the tuner. This circuit ensures
a constant output amplitude
regardless of the input amplitude
Amplitude Modulation; A "data
encoding to a carrier" method, such
that the carrier amplitude is
proportional to the data value
Asia Pacific
Aspect Ratio: 4 by 3 or 16 by 9
Automatic Standard Detection
External Audio Video
Monochrome TV system. Sound
carrier distance is 5.5 MHz. B= VHF-
band, G= UHF-band
Circuit Board Assembly (also called
PCB or PWB)
Constant Level: audio output to
connect with an external amplifier
Color Look-Up Table
Color LUMinance Baseband Universal
Subsystem. IC performing noise
reduction and 2D/3D comb filtering
Computer aided rePair. A tool for
diagnosing a TV through a PC
controlled interface
Customer Service Mode
Composite Video and Blanking Signal;
A single video signal that contains
luminance, color, and timing
information
Digital to Analogue Converter
Dynamic Bass Enhancement: extra
low frequency amplification
Directions For Use: Owner's manual
Dynamic Noise Reduction / Digital
Noise Reduction; Noise reduction
feature of the set
Dynamic RAM; dynamically refreshed
RAM
Digital Signal Processing
Electrically Erasable and
Programmable Read Only Memory
Electronic Program Guide: system
used by broadcasters to transmit TV
guide information (= NexTView)
Europe
EXTernal (source), entering the set by
SCART or by cinches (jacks)
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
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
Frame Rate Converter
Front input chrominance (SVHS)