Roadstar CTV-1015, Руководство по обслуживанию

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TV Signal processor- Teletext decoder with embedded -controller
TDA935X/6X/8X PS/N2 Series
General description & features
TDA 9361/9381 PS/N2 combine the functions of a TV signal
processor together with a -controller and US Closed Caption
Decoder.
TDA 9361 has a Teletext decoder on board.
The Teletext decoder has an internal RAM memory for 10 page
text.
Multi-standard vision IF circuit with alignment-free PLL demodulator
Internal(switchable)time-constant for the IF-AGC circuit
A choice can be made between versions with mono intercarrier sound FM demodulator
and version with QSS IF amplifier
The mono intercarrier sound versions have a selective FM-PLL demodulator which
can be switched to the different FM sound frequencies(4.5/5.5/6.0/6.5MHz)
The quality of this system is such that the external band-pass filters can be omitted
Source selection between ‘internal’ CVBS and external CVBS or Y/C signals
Intergrated chrominance trap circuit
Intergrated luminance delay line with adjustable delay time
Picture improvement features with peaking (with variable centre frequency
and positive/negative overshoot ratio)and black stretching
Integrated chroma band-pass filter with switchable centre frequency
Only one reference(12MHz)crystal required for the -Controller, Teletext and the
colour decoder
PAL/NTSC or multi-standard colour decoder with automatic search system
Internal base-band delay line
RGB control circuit with ‘continuous Cathode Calibration’, white point and black
level offset adjustment so that the colour temperature of the dark and the light
parts of the screen can be chosen independently
Linear RGB or YUV input with fast blanking for external RGB/YUV sources
The text/OSD signals are internally supplied from the -controller/Teletext decoder
Contrast reduction possibility during mixde-mode of OSD and Text signals
Horizontal synchronization with two control loops and alignment-free horizontal oscillator
Vertical count-down circuit
Vertical driver optimized for DC-coupled vertical output stages
Low-power start-up of the horizontal drive circuit
General description & features
TDA 9361/9381 PS/N2 combine the functions of a TV signal
processor together with a -controller and US Closed Caption
Decoder.
TDA 9361 has a Teletext decoder on board.
The Teletext decoder has an internal RAM memory for 10 page
text.