Philips a10, A10E Schematic

ADDITIONAL INFORMATION CHASSIS A 10

LIST OF ABBREVIATIONS

NAME Description

+13V +13V from line deflection
+13V_SCAVEM +13V supply for SCAVEM
+14V +14V from power supply
+15V +15V from power supply for sound amp.
+200V +200V for RGB amp.
+33V +33V tuner voltage
+5V +5V supply from supply
+5V_STBY +5V standby from power supply
+5VA +5V supply for tuner
+5VD +5V standby supply for µP
+5VSOUND +5V for sound processing
+8V +8V from power supply
+8VA +8V for I/O switching
+8VB +8V for BI-MOS
+8VSOUND +8V for sound processing
+L SPK pos. audio output to left speaker
+R SPK pos. audio output to right speaker

-13V -13V from power supply
2CS 2 Carrier Stereo
ACI Automatic Channel Installation: algorithm that installs

TV sets directly from cable network by means of a

predefined TXT page
ADC Analogue 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 featurebox
AM Amplitude Modulation
AMP_MUTE1 signal from µP to mute audio amp.
AR Aspect Ratio: 4 by 3 or 16 by 9
Artistic see Painter 2.5: main processor
AVL Automatic Volume Level
B_TXT_OSD Bleu signal from TXT/OSD
B_Y_IN (B-Y) input of BI-MOS (from TDA9178)
B_Y_OUT (B-Y) output from BI-MOS (to TDA9178)
BASEBAND_AUDIO Baseband audio from BI-MOS or QSS
BG System B and G
BLKIN Black current information
BOCMA Bimos one Chip Mid-end Architecture

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ADDITIONAL INFORMATION CHASSIS A 10

BOCMA High-end video Input Processor: video and chroma

decoder of A10E
B-SC1-IN Blue SCART1 in
B-SC2-IN Blue SCART2 in
B-TXT Blue teletext
C_EXT Chroma signal coming from EXT. source
C_FRNT Chroma signal coming from side AV.
C_REAR Chroma signal coming from rear I/O
C-FRONT Chrominance front input
CL Constant Level: audio output to connect with an

external amplifier
COMB_ON control signal from BI-MOS to switch on/off the comb +

sub carrier
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_INT CVBS signal from BI-MOS (tuner)
CVBS_MON CVBS monitor signal form BI-MOS
CVBS_PIP_EXT CVBS signal from EXT. source for PIP
CVBS_PIP_FRNT CVBS signal from side AV. for PIP
CVBS_PIP_INT CVBS signal from tuner for PIP
CVBS_PIP_REAR CVBS signal from rear I/O for PIP
CVBS_TERR CVBS signal from BI-MOS (tuner)
CVBS+SIF_MAIN CVBS + SIF from main for 2 tuner PIP (USA)
CVBS-EXT CVBS signal from external source (VCR, VCD, etc.)
CVBS-INT CVBS signal from Tuner
CVBS-MON CVBS monitor signal
CVBS-TER-OUT CVBS terrestrial out
D1_DAF1 Flyback voltage
D2_P1 Flyback voltage
DAF2_P2 Flyback voltage
DATA in Reserved for MM (combined with STET_EXT1)
DATA out Reserved for MM (combined with SEL_PIP_R1R2 and

STAT_EXT2)
DEGAUSS Signal from µP to control the degaussing
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-PHASE-CORR Dynamic phase correction

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ADDITIONAL INFORMATION CHASSIS A 10

E_W _DRIVE EW signal from BI-MOS to EW panels
EHT Extra High Tension
EHT_INFO Beam current info signal
EHT-INFO Extra High Tension information
EPG Electronic Program Guide: system used by

broadcasters to transmit TV guide information (=

NexTView)
EW East West, related to horizontal deflection of the set
EXT External (source), entering the set via SCART or via

cinches
FBL Fast Blanking: DC signal accompanying RGB signals
FBL_EXT Fastblanking signal from SCART
FBL_OSD Fastblanking from OSD gen
FBL_TXT_OSD Fastblanking signal from TXT/OSD
FBL-SC1-IN Fast blanking signal for SCART1 in
FBL-SC2-IN Fast blanking signal for SCART2 in
FBL-TXT Fast Blanking Teletext
FF Heater voltage
FFBL_EXT Control signal to ident. full screen EXT RGB
FIL Filament supply voltage
FM Field Memory or Frequency Modulation
FRNT_CNTRL AD input signal of µP from front control
FRONT-C Front input chrominance (SVHS)
FRONT-DETECT Front input detection
FRONT-Y_CVBS Front input luminance or CVBS (SVHS)
G_TXT_OSD Green signal from TXT/OSD
GND Ground
GND_LOT Ground from LOT
GNDHOT Live ground
G-SC1-IN Green SCART1 in
G-SC2-IN Green SCART2 in
G-TXT Green teletext
H_DRIVE Horizontal drive pulse from BI-MOS
H_NEG Negative horizontal pulse for PIP, OSD gen. and MM
HA Horizontal Acquisition: horizontal sync pulse coming out

of the BOCMA
HFB Horizontal flyback pulse
HFB Horizontal Flyback Pulse: horizontal sync pulse from

large signal deflection
HP Headphone
IF1 IF signal from tuner to BI-MOS and QSS
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-BUS In/Out - Bus

-L SPK neg. audio output to left speaker

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