Service manual

CP-850FX Service Manual
Europe R&D
2
4.4.1.5 German 2-Carrier System (DUAL FM System).........................................................30
4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR .......33
4.5.1 DESCRIPTION ............................................................................................................33
4.5.2 FEATURES..................................................................................................................33
4.5.3 PINNING......................................................................................................................33
4.5.4 BLOCK DIAGRAM.......................................................................................................34
4.6 TDA8946J STEREO AUDIO AMPLIFIER .........................................................................35
4.6.1 FEATURES..................................................................................................................35
4.7 TDA8358J VERTICAL AMPLIFIER...................................................................................37
4.7.1 FEATURES..................................................................................................................37
4.8 TDA6108JF.......................................................................................................................39
4.9 24C16 - 16 KB EEPROM ..................................................................................................40
4.10 STR – W6754....................................................................................................................41
4.10.1 GENERAL DESCRIPTION ........................................................................................41
4.10.2 FEATURES................................................................................................................41
4.10.3 BLOCK DIAGRAM.....................................................................................................41
4.10.4 PIN DESCRIPTION ...................................................................................................42
4.10.5 MOSFET ELECTRICAL CHARACTERISTICS ..........................................................42
4.10.6 ELECTRICAL CHARACTERISTICS..........................................................................43
5 CP-850FX CHASSIS DESCRIPTION...................................................................................44
5.1 POWER SUPPLY BLOCK DIAGRAM...............................................................................44
5.2 VIDEO & STEREO AUDIO BLOCK DIAGRAM.................................................................45
5.3 IF SECTION......................................................................................................................46
5.3.1 BLOCK DIAGRAM.......................................................................................................46
5.3.2 VISION IF AMPLIFIER ................................................................................................47
5.3.3 TUNER-AND VIF-AGC ................................................................................................47
5.3.4 FPLL, VCO AND AFC..................................................................................................47
5.3.5 VIDEO DEMODULATION AND AMPLIFIER ...............................................................48
5.3.6 SOUND IF AMPLIFIER AND SIF-AGC........................................................................48
5.3.7 QUASI-PARALLEL-SOUND (QPS) MIXER .................................................................48
5.3.8 STANDARD SWITCH..................................................................................................48
5.3.9 L’ SWITCH...................................................................................................................48
5.3.10 INTERNAL VOLTAGE STABILISER .........................................................................48
5.4 VIDEO / RGB ....................................................................................................................48
5.4.1 FRONT END................................................................................................................48
5.4.1.1 CVBS Front-End .......................................................................................................48
5.4.1.2 Input Selector............................................................................................................49
5.4.1.3 Signal Levels And Gain Control ................................................................................49
5.4.1.4 Synchronization ........................................................................................................49
5.4.1.5 Chroma Decoder ......................................................................................................49
5.4.1.6 Luminance Processing..............................................................................................49
5.4.1.7 RGB Front-End .........................................................................................................49
5.4.1.8 Signal Processing .....................................................................................................49
5.3.1.8.1 Horizontal Prescaler...............................................................................................49
5.3.1.8.2 Noise Reduction .....................................................................................................50
5.3.1.8.3 Noise Measurement...............................................................................................50
5.3.1.8.4 Operation Modes ...................................................................................................50
5.3.1.8.5 Digital 656 Output ..................................................................................................50
5.4.2 BACK END ..................................................................................................................50
5.4.2.1 Digital Input Interface................................................................................................50
5.4.2.2 Horizontal Scaler ......................................................................................................50
5.4.2.3 Luma Contrast and Brightness .................................................................................51
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