Philips 286NS-05, Руководство по обслуживанию

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11 List of Abbreviations
36 Comet
11 List of Abbreviations
+96S Supply voltage from the SMPS to the line
output stage.This voltage is 104V for 21" sets.
+160V Supply voltage from the LOT for the CRT-
panel.
+40D Supply voltage from the LOT for vertical
deflection.
+8V Supply voltage for AM-sound.
+8Vx +8V Supply voltage from the SMPS for the
whole small signal part. x can be (a,b,c,d).
+5Sx +5V supply voltage from the SMPS to the
µ
C
and periphery. x can be (a,b,c,d).
mC Microcomputer.
AFC Automatic Frequency Control.
AGC Automatic Gain Control.
AQUA Aquadag on the rear side of the picture tube to
pin 8 of the LOT.
ATS Automatic Table Setting (auto install system
for Germany only).
AUDIO-OUT Outgoing audio signal from pin 15 IC7140 to
pin 1 and 3 from scart.
B-SC-IN Blue input signal from the scart to the video
controller IC7015-6D.
BASEBAND CVBSBaseband CVBS signal from the IF-
detector IC7015-6B to the FM-demodulator
IC7015-6F.
BEAM INFO Beam Current Info; If beam current increases
the BCI signal decreases. BCI is used for
contrast reduction (if beam current is too high)
and picture correction (if beam current
increases (more white), EHT decreases so
picture will become too big, BCI decreases and
the picture will be corrected).
BRIGHTNESS Control signal (from
µ
C, but on DC level via RC
network) for brightness control of the video
controller IC7015-6D (0-5V).
BS1 Switching signal from the
µ
C to select tuner-
band.
BS2 Switching signal from the
µ
C to select tuner-
band.
C Chrominance part of the video signal; this
signal is also directly input at the SVHS plug.
CCT Computer Controlled Teletext.
CONTRAST Control signal (from
µ
C, but on DC level via RC
network) for contrast control of the video
controller IC7015-6D (0-4V5).
CVBS Colour Video Blanking Synchronisation
(present behind soundtrap 1102).
CVBS-SC-IN Incoming CVBS signal from pin 20 of scart to
the external input pin 15 IC7015-6B.
EEPROM Electrical Erasable Programmable Read Only
Memory.
ESD Electrical Static Discharge.
FBL Fast blanking signal made by adding the fast
blanking signals of the
µ
C and the SCART fast
blanking signals.
FBL-SCART Fast blanking input signal from scart which is
added to the other fast blanking signals to
control the video controller IC7015-6D.
FBL-
µ
P Fast blanking signal from the
µ
P which is
added to the other fast blanking signals to
control the video controller IC7015-6D.
ff Filament (heater voltage) from LOT to the
picture tube.
FLOF Full Level One Feature.
FM FM demodulated sound from the FM-
demodulator IC7015-6F.
G-SC-IN Green input signal from the scart to the video
controller IC7015-6D.
H.DRIVE Horizontal drive signal from IC7015-6E to line
output stage.
HFB Horizontal flyback pulse (15625 Hz) used for
locking the horizontal oscillator in IC7015-6E.
I2C Digital control bus of the microcomputer.
IDENT Status signal from IC7015-6B; "low" for no
CVBS signal (horizontal sync not present),
"high" in case CVBS signal is present
(horizontal sync present) from the IF-detector
IC7015-6B to the
µ
C.
IF Intermediate frequency signal from the tuner to
the AM-demodulator IC7125.
LF-input Low frequency sound-signal. Input signal for
sound amplifier.
L/BG Switching signal from
µ
C; "low" for LL
reception (positive modulation, AM sound),
"high" for BGIDK reception (negative
modulation, FM sound). The
µ
C makes BG/L
"high" in case EUROPE or UK is selected, and
"low" in case FRANCE is selected.
L/L' or BGDK In case of a LL' set, selection is made between
L and L'. In case of a BGDK set, selection is
made between BG and DK. If this pin is "high"
then L' or DK is selected.
NIL Non Inter Lace; 25 Hz block-shaped signal
from the_
µ
C to the frame amplifier for
coinciding the odd & even frames.
OSD-B Blue info from OSD generator in
µ
C to the
video controller IC7015-6D for inserting blue
info on the screen.
OSD-G Green info from OSD generator in
µ
C to the
video controller IC7015-6D for inserting green
info on the screen.
OSD-R Red info from OSD generator in
µ
C to the
video controller IC7015-6D for inserting red
info on the screen.
POR Power On Reset; ensures the
µ
C starts up its
software only if the power supply of the
µ
C
itself is high enough.
PP Personal Preference.
R-SC-IN Red input signal from the scart to the video
controller IC7015-6D.
RAM Random Access Memory.
ROM Read Only Memory.
SANDCASTLE Sandcastle signal from IC7015-6F to delay line
IC7271 and SECAM chroma decoder IC7250.
SANDCASTLE1 Sandcastle signal from IC7015-6F to
µ
C.
SATURATION Control signal (from
µ
C, but on DC level via RC
network) for saturation control of the video
controller IC7015-6D (0-2V5).
SAW Surface Acoustic Wave; high precision
bandpass filter.
SCL Clock line of the I2C-bus.
SDA Data line of the I2C-bus.
SDAM Service Default-Alignment Mode; predefined
mode for faultfinding (see chapter 8).
SHARPNESS Control signal on DC level (0-5V) from
µ
C to
IF-detector IC7015-6B) for sharpness control.
SM Service Menu.
SMPS Switched Mode Power Supply.
SND-SC-l Incomming audio signal from pin 6 from the
scart. This signal is the left audio-channel.
SND-SC-r Incoming audio signal from pin 2 and pin 6
from scart. In case of a stereo set this is the
scart-input for the right sound channel.
SND-SC-L Outgoing audio signal from pin 3 to the scart.
This signal is the left audio-channel.
SND-SC-R Outgoing audio signal from pin 1 and pin 3 to
scart. In case of a stereo set this is the scart-
output for the right sound channel.
STANDBY/AFC Switching signal from
µ
C; "low" for standby
(power supply will be switched to stand-by
mode), "high" for normal operation. This pin
acts also as an input for AFC.
STATUS Switching signal; "low" for internal CVBS,
"high" for external CVBS.
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