Daewoo CHASSIS : SC-150 Model : DSC-3220E, Service Manual

Service manual SC-150

-3-

Fo

5-4-1 Introduction........................................................................................................................................... 51
5-4-2 CPU ...................................................................................................................................................... 51

............................................................................... 52

5-4-4 Tuning .................................................................................................................................................. 52
5-4-5 Automatic

rmat switching  and WSS ............................................................................................... 52

5-4-6 EXTERNAL  source  control  logic

........................................................................................................... 54

5-4-7 Over  Current  Protection

........................................................................................................................ 55

5-5Teletext  Display ................................................................................................................................................. 55
5-6 Sound  processing

............................................................................................................................................... 56

5-6-1 Analogue  sound  IF-input  section

............................................................................................................ 56

5-6-2 Quadrature  Mixers ........................................................................................................... ..................... 56
5-6-3 Phase  and  AM  discr imination........................................................................................................... 56
5-6-4 NICAM  decoder.................................................................................................................................... 57
5-6-5 DSP  section.......................................................................................................................................... 57
5-6-6 Sound  Mode switching.......................................................................................................................... 57

5-7 Sound  amplification........................................................................................................................................... 57

5-7-1 Power  amplifier..................................................................................................................................... 57
5-7-2 Mode selection....................................................................................................................................... 58

5-8 Vertical  deflection............................................................................................................................................. 58

5-8-1 Flyback voltage..................................................................................................................................... 58
5-8-2 Protection.............................................................................................................................................. 58
5-8-3 Guard circuit.......................................................................................................................................... 58
5-8-4 Damping  resistor................................................................................................................................... 58
5-8-5 EAST-WEST  Amplifier  (TDA8358J only)............................................................................................... 58

5-9 Power supply  (STR  F6653)

.. .............................................................................................................................. 59

5-9-1 STR-F6654  gener

aral description......................................................................................................... 59

5-9-2 Power  supply  primary  par t  operations

................................................................................................... 59

5-10TV start-up, TV  normal run  and  stand by  mode  operations

............................................................................... 63

5-10-1 TV  start-up  operations .......................................................................................................................... 63
5-10-2 TV normal run  and stand-by mode  operations

....................................................................................... 64

6 - Se

6 -1 Service  part list

rvice  parts  list..................................................................................................................................................

...........................................................................................................................................

. 69

69

6 -2 Service  part list option ............................................................................................................................... 79

7 - Exploded  View ........................................................................................................................................................ 80

........................................................................................................................................................ 81

........................................................................................................................................................ 83

8 - PCB Layout

................................................................................................................................................... 81

8 -1 MAIN PCB

................................................................................................................................................... 82

8 -2 UNION PCB

9 - Circuit Diagram

.................................................................................................................................... 83

9 - 1 Circuit Diagram(MAIN)

.................................................................................................................................. 84

9 - 2 Circuit Diagram(UNION)

5-4-3

    -Controller I/O pin configuration and function

5-3-17 Analogue  RGB  Insertion ..................................................................................................................... 50
5-3-18 Fast-Blank  Monitor .....................................................................................................

........................... 50

5-3-19 Vertical  and  East/West  Deflection ....................................................................................

................... 50

5-3-20 EHT Compensation ........................................................................................................

........................ 51

5-3-21 Reset  Function .........................................................................................................

............................. 51

5-3-22 Standby  and  Power-On ..................................................................................................

...................... 51

5-4 Micro-controller ...............................................................................................................

.......................................... 51