Circuit description new circuits
GB 63L9.2A 9.
RGB_Blanking Red Green Blue Blanking signal
(combined with AV_MUTE)
RightOut Audio right signal output
R_TXT_OSD Red TXT or OSD signal from uC to the
video controller IC7250 (BIMOS)
ROM Read Only Memory
SAM Service Alignment Mode. Service
mode for alignments and error buffer
display
SAP Second audio program (only for USA
& A/P sets)
SCL Clock line of the I2C-bus
SCL2 2nd Clock line of the IIC-bus (only
used in L9-ITV sets)
SDA Data line of the I2C-bus
SDA2 2nd Data line of the I2C-bus (only
used in L9-ITV sets)
SDM Service Default Mode. Service mode
with predefined settings for waveform
and voltage measurements, error
buffer display and option (byte)
setting.
SIF Sound IF signal for FM audio
demodulator
SMPS Switching Mode Power Supply
STANDBY Switching signal from micro controller;
"low" for standby (power supply will be
switched to stand-by mode), "high" for
normal operation
SW_OUT Selected Output signal from source
SYNC Synchronisation
TBD To Be Defined
TREBLE Control signal for treble
TXT Teletext
µ
C Micro controller
USA United States; schematic/PCB
information (only) applicable for North
American sets
V_TUNE Tuning voltage for tuner
Vdrive - Negative Vertical drive pulse signal
Vdrive + Positive Vertical drive pulse signal
VD Vertical pulse derivation
VFL Vertical flyback pulse used to inform
the micro controller that flyback is
occurring. This is critical for the correct
OSD and TXT
Vflybk Vertical flyback pulse
VG2 Voltage on grid 2 of the picture tube
(screen control)
VideoOut CVBS output signal
VOLUME Control signal (from micro controller,
but on DC level via RC network) for
sound processing in sound IC
XRAY-PROT XRAY protection (only for USA sets)
YC Luminance (Y) and Chrominance (C)
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