Once the signal source is selected, a chroma filter calibration is performed. The
received color burst sub-carrier frequency is used for this. Correspondingly, the chroma
band pass filter for PAL/NTSC processing or the cloche filter for SECAM processing is
switched on. The selected luminance (Y) signal is supplied to the horizontal and vertical
synchronization processing circuit and to the luminance processing circuit. In the
luminance-processing block, the luminance signal goes to the chroma trap filter. This
trap is switched "on" or "off" depending on the color burst detection of the chroma
calibration circuit.
The group delay correction part can be switched between the BG and a flat group delay
characteristic. This has the advantage that in multi-standard receivers no compromise
has to be made for the choice of the SAW filter.
Video demodulation
The color decoder circuit detects whether the signal is a PAL, NTSC or SECAM signal.
The result is made known to the auto system manager. The PAL/NTSC decoder has an
internal clock generator, which is stabilized to the required frequency by using the 12
MHz clock signal from the reference oscillator of the microcontroller / teletext decoder.
The base-band delay line is used to obtain a good suppression of cross color effects.
The Y signal and the delay line outputs U and V are applied to the luminance / chroma
signal processing part of the TV processor.
Luminance / Chrominance signal processing
The output of the YUV separator is fed to the internal YUV switch, which switches
between the output of the YUV separator or the external YUV (for DVD or PIP) on pins
51-53. Pin 50 is the input for the insertion control signal called ‘FBL-1’. When this signal
level becomes higher than 0.9 V (but less than 3 V), the RGB signals at pins 51, 52 and
53 are inserted into the picture by using the internal switches.
Also some picture improvement features are implemented in this part:
Summary of Contents for 7629
Page 1: ......
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Page 14: ...AV2 In SVHS Connector Kind Value Symbol 1 gnd v 2 gnd v 3 Y 1 Vpp 75 O j 4 C 0 3 Vpp 75 O j ...
Page 16: ...Figure ...
Page 18: ...Figure ...
Page 48: ...Hardware Alignments Figure Mono Carrier Top View LS ...
Page 76: ...Power Supply Figure Figure ...
Page 101: ...T8 7629 ...
Page 102: ...T8 7629 ...
Page 103: ...T8 7629 ...
Page 104: ...T8 7629 ...
Page 105: ...All Models 7629 PCB Locations ...
Page 106: ...All Models 7629 Power Supply Diagram A1 ...
Page 107: ...All Models 7629 Line Deflection Diagram A2 ...
Page 108: ...All Models 7629 Frame Deflection Diagram A3 ...
Page 109: ...All Models 7629 Tuner IF Diagram A4 ...
Page 110: ...All Models 7629 Video IF And Sound IF Diagram A5 ...
Page 111: ...All Models 7629 Synchronization Diagram A6 ...
Page 112: ...All Models 7629 Control Diagram A7 ...
Page 113: ...All Models 7629 Audio Amplifier Diagram A8 ...
Page 114: ...All Models 7629 BTSC Stereo SAP Decoder Diagram A9 ...
Page 115: ...All Models 7629 Audio Video Source Switching Diagram A10 ...
Page 116: ...All Models 7629 BTSC NDBX Stereo Decoder Diagram A11 ...
Page 117: ...All Models 7629 Front I O Control Headphone Diagram A12 ...
Page 118: ...All Models 7629 Rear I O Cinch Diagram A13 ...
Page 119: ...All Models 7629 PIP Interface Diagram A16 ...
Page 120: ...All Models 7629 CRT Panel Diagram B1 ...
Page 123: ...USED ONLY IN MODELS 27PS60S321 27RF72S325 32PS61S321 7629 PIP Panel Diagram P ...
Page 125: ...USED ONLY IN MODELS PC0125C321 PC0127C321 7629 EPS Panel Schematic ...
Page 126: ...USED ONLY IN MODELS PC0125C321 PC0127C321 7629 Card Interface Schematic ...
Page 128: ...All Models 7629 Main Panel component side ...
Page 129: ...All Models 7629 Main Panel copper side ...
Page 130: ...All Models 7629 CRT Panel component side ...
Page 131: ...All Models 7629 CRT Panel copper side ...
Page 132: ...All Models 7629 Headphone Panel component side ...
Page 133: ...All Models 7629 Side AV Panel component side ...
Page 134: ...All Models 7629 PIP panel component side ...
Page 135: ...All Models 7629 PIP panel copper side ...
Page 136: ...All Models 7629 Top Control Panel component side ...
Page 137: ...All Models 7629 EPS Panel PCB Top View only ...
Page 138: ...All Models 7629 Card Interface Panel PCB Top View ...
Page 139: ...All Models 7629 Card Interface Panel PCB Bottom View ...
Page 140: ...MAIN CABINET EXPLODED VIEW ...