Daewoo DTF-2950-100D - Page 4

CP-850FX Service Manual
Europe R&D
3
5.4.2.4 Black Level Expander/Compressor (BLEC) ..............................................................51
5.4.2.5 Luma Sharpness Enhancer (LSE) ............................................................................51
5.4.2.6 Dynamic Peaking......................................................................................................51
5.4.2.7 Luma Transient Improvement (LTI) ..........................................................................51
5.4.2.8 Mixing of Dynamic Peaking and LTI .........................................................................51
5.4.2.9 Chroma Transient Improvement ...............................................................................51
5.4.2.10 Analog Back End ....................................................................................................53
5.4.2.11 Analog RGB Insertion .............................................................................................53
5.4.2.12 CRT Measurement and Control ..............................................................................53
5.4.2.13 Synchronization and Deflection ..............................................................................54
5.4.2.14 EHT Compensation ................................................................................................54
5.5 MICRONTROLLER ...........................................................................................................54
5.5.1 MICROCONTROLLER FEATURES ............................................................................54
5.5.2 ACQUISITION FEATURES .........................................................................................54
5.5.3 PORTS ........................................................................................................................55
5.5.4 μ-CONTROLLER I/O PIN CONFIGURATION AND FUNCTION TABLE .....................55
5.5.5 TUNING.......................................................................................................................55
5.5.6 AUTOMATIC PICTURE FORMAT SWITCHING .........................................................56
5.5.6.1 WSS Data .................................................................................................................56
5.5.6.2 SCART Pin 8 Data (Slow Switching) ........................................................................57
5.5.6.3 Picture Format Description .......................................................................................57
5.3.1.8.1 16:9 CRT ...............................................................................................................57
5.3.1.8.2 4:3 CRT .................................................................................................................58
5.5.7 EXTERNAL SOURCE CONTROL LOGIC...................................................................59
5.5.8 OVER CURRENT PROTECTION................................................................................60
5.6 TELETEXT DISPLAY........................................................................................................60
5.7 SOUND PROCESSING ....................................................................................................61
5.7.1 ANALOGUE SOUND IF - INPUT SECTION...............................................................61
5.7.2 QUADRATURE MIXERS.............................................................................................61
5.7.3 PHASE AND AM DISCRIMINATION ...........................................................................61
5.7.4 NICAM DECODER ......................................................................................................62
5.7.5 DSP SECTION ............................................................................................................62
5.7.6 SOUND MODE SWITCHING.......................................................................................62
5.8 SOUND AMPLIFICATION.................................................................................................62
5.8.1 POWER AMPLIFIER ...................................................................................................62
5.8.2 MODE SELECTION.....................................................................................................63
5.9 VERTICAL DEFLECTION.................................................................................................63
5.9.1 FLYBACK VOLTAGE ..................................................................................................63
5.9.2 PROTECTION .............................................................................................................63
5.9.3 GUARD CIRCUIT ........................................................................................................63
5.9.4
DAMPING RESISTOR.................................................................................................63
5.9.5 EAST-WEST AMPLIFIER............................................................................................63
5.10 POWER SUPPLY (STR-W6754) - FUNCTIONS OF EACH TERMINAL ..........................64
5.10.1 Vcc Terminal (Pin 4)...................................................................................................64
5.10.1.1 Start-up Circuit........................................................................................................64
5.10.1.2 Auxiliary/Drive Winding...........................................................................................65
5.10.1.3 Overvoltage Protection Circuit ................................................................................66
5.10.1.4 Latch Circuit............................................................................................................67
5.10.2 SS/OLP Terminal (Pin 5)..........................................................................................67
5.10.2.1
Soft-Start Operation at Start-up of Power Supply ...................................................67
5.10.2.2
Overload Protection ................................................................................................68
5. 10. 2. 3
Operation at Power Supply OFF ...........................................................................69
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